Initialisierung: Übertragung aus altem Repository

.gitignore

@@ -0,0 +1,8 @@
+/NateMan.egg-info/
+/build/
+/dist/
+/instance/
+/venv/
+
+# pycache-Verzeichnisse überall ignorieren
+__pycache__/

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

MANIFEST.in

@@ -0,0 +1,5 @@
+include wsgi.py
+graft nateman/resources
+graft nateman/static
+graft nateman/templates
+global-exclude *.pyc

README.md

@@ -0,0 +1,20 @@
+# NateMan
+
+NateMan (**Na**chschreib**te**rmin-**Man**ager) ist eine Webanwendung zur Koordination von Klausuren gymnasialer Oberstufen. Klausurpläne können aus verschiedenen Formaten (z.B. Kurs42, bald auch UNTIS) importiert oder direkt im Webinterface erstellt werden und sind anschließend öffentlich einsehbar. Über eigene Lehrerkonten können Klausuraufsichten nach einer Klausur Versäumnisse eintragen. Beratungslehrer und Oberstufenkoordinatoren können diese Bearbeitungen einsehen, bei Bedarf ändern und Atteste für Versäumnisse eintragen.
+
+![Klausurliste in NateMan](./screenshots/klausurliste.png)
+
+## Funktionen
+* Import und Bearbeitung von Klausurlisten (aus Kurs42, bald auch UNTIS)
+* administrierbares Anmeldesystem für Lehrkräfte
+* Eintragung von Klausurversäumnissen und Attesten
+* Einsicht und Export (Excel) von Versäumnislisten
+* Klausurerinnerungen per E-Mail
+* öffentlich einsehbare Klausurpläne
+
+## Installation
+NateMan kann wie jede andere Flask-App installiert werden.
+
+Nach dem ersten Start wird automatisch eine ausführlich kommentierte Konfigurationsdatei `config.yml` angelegt. Hier müssen die Einträge `server-name` sowie `uses-ssl` entsprechend angepasst werden. Für die Nutzung des E-Mail-Versands müssen auch die Einträge unter `mail` geändert werden.
+
+Die erste Einrichtung erfolgt über den CLI-Befehl `nateman`. Um ein neues Lehrerkonto mit Administratorrechten anzulegen, führen Sie `nateman add-lehrer --admin <KÜRZEL>` aus. Mit diesem Konto können Sie sich anschließend im Webinterface anmelden.

logo-sources/icon-apple.svg

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg height="180" width="180" xmlns="http://www.w3.org/2000/svg">
+  <rect width="100%" height="100%" fill="#143d59" />
+  <text x="50%" y="50%" dominant-baseline="central" text-anchor="middle" fill="#87aa25" font-family="Pridi" font-size="156px">N</text>
+</svg>

logo-sources/logo.svg

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg height="192" width="192" xmlns="http://www.w3.org/2000/svg">
+  <circle cx="50%" cy="50%" r="50%" fill="#143d59" />
+  <text x="50%" y="50%" dominant-baseline="central" text-anchor="middle" fill="#87aa25" font-family="Pridi" font-size="156px">N</text>
+</svg>

nateman/__init__.py

@@ -0,0 +1,166 @@
+# NateMan – Nachschreibtermin-Manager
+# __init__.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält die Initialisierungsfunktion der NateMan-Webapp.
+"""
+
+import locale
+import logging.handlers
+import os
+import sys
+from datetime import datetime
+
+import sqlalchemy
+from flask import abort, Flask, request, send_from_directory
+from flask.logging import default_handler
+from werkzeug.utils import find_modules, import_string
+
+from . import util
+from .config_manager import config_file_exists, create_config_file, config
+from .config_manager import read_config_file
+from .models import Klausur, Klausurteilnahme, Koopschule, Lehrer, Schueler, Stufe, db
+
+
+def create_app() -> Flask:
+    """Initialisiert die NateMan-Webapp"""
+
+    app: Flask = Flask(__name__, instance_relative_config=True)
+
+    # Sprache festlegen
+    locale.setlocale(locale.LC_ALL, "")
+
+    setup_logging(app)
+
+    # falls nötig, instance-Ordner anlegen
+    os.makedirs(app.instance_path, exist_ok=True)
+
+    load_config(app)
+
+    secret_key = read_or_generate_secret_key(app)
+
+    configure_jinja(app)
+
+    # Falls in der Konfiguration aktiviert, Datei-Logging einrichten
+    if config["logging"].get("syslog", False):
+        setup_syslog(app)
+
+    # Logging-Level ändern
+    app.logger.setLevel(config["logging"]["level"])
+
+    # Flask und Flask-SQLAlchemy konfigurieren
+    app.config.from_mapping(
+        SERVER_NAME=config["server-name"],
+        SECRET_KEY=secret_key,
+        PREFERRED_URL_SCHEME="https" if config["uses-ssl"] else "http",
+        SESSION_COOKIE_SECURE=config["uses-ssl"],
+        MAX_CONTENT_LENGTH=16 * 1024 * 1024,  # 16 MiB upload limit
+        SQLALCHEMY_DATABASE_URI="sqlite:///" + os.path.join(app.instance_path, "nateman.sqlite3"),
+        SQLALCHEMY_TRACK_MODIFICATIONS=False
+    )
+
+    db.init_app(app)
+    db.create_all(app=app)
+
+    # Blueprints registrieren
+    register_blueprints(app)
+
+    return app
+
+
+def setup_logging(app: Flask):
+    stdout_handler = logging.StreamHandler(sys.stdout)
+    formatter = logging.Formatter(
+        fmt="[%(asctime)s | %(levelname)s]: %(message)s"
+    )
+    stdout_handler.setFormatter(formatter)
+    app.logger.removeHandler(default_handler)
+    app.logger.addHandler(stdout_handler)
+
+
+def load_config(app: Flask):
+    """
+    Liest die Konfigurationsdatei.
+    Falls keine vorhanden ist, erstellt eine und beendet anschließend NateMan.
+    """
+    if not config_file_exists(app):
+        app.logger.critical("Die Konfigurationsdatei konnte nicht gefunden werden, erstellt eine neue...")
+        config_path = create_config_file(app)
+        app.logger.critical(f"Da die Konfigurationsdatei nicht gefunden werden konnte, "
+                            f"wurde eine neue erstellt ({config_path}). NateMan wird nun beendet.")
+        sys.exit(1)
+
+    # Konfigurationsdatei laden
+    read_config_file(app)
+
+
+def read_or_generate_secret_key(app: Flask) -> bytes:
+    """ Liest den Secret Key aus bzw. generiert ihn, falls noch keiner vorhanden ist. """
+    secret_key_path = os.path.join(app.instance_path, "SECRET_KEY")
+
+    if not os.path.isfile(secret_key_path):
+        with open(os.open(secret_key_path, os.O_WRONLY | os.O_CREAT, mode=0o600), "wb") as file:
+            secret_key = os.urandom(128)
+            file.write(secret_key)
+    else:
+        with open(secret_key_path, "rb") as file:
+            secret_key = file.read()
+
+    return secret_key
+
+
+def configure_jinja(app: Flask):
+    app.jinja_env.globals.update(
+        nateman_config=config,
+        util=util,
+        sqlalchemy=sqlalchemy,
+        datetime=datetime,
+        db=db,
+        Klausurteilnahme=Klausurteilnahme,
+        Stufe=Stufe,
+        Schueler=Schueler,
+        Lehrer=Lehrer,
+        Klausur=Klausur,
+        Koopschule=Koopschule
+    )
+    app.jinja_env.trim_blocks = True
+    app.jinja_env.lstrip_blocks = True
+    app.jinja_env.strip_trailing_newlines = False
+
+
+def setup_syslog(app: Flask):
+    """ Erstellt Logging-Handler zum loggen in Syslog. """
+    file_handler = logging.handlers.SysLogHandler(address="/dev/log")
+    file_formatter = logging.Formatter(fmt="nateman: [%(levelname)s] %(message)s")
+    file_handler.setFormatter(file_formatter)
+    app.logger.addHandler(file_handler)
+
+
+def register_blueprints(app: Flask):
+    """ Registriert die Flask-Blueprints """
+    from . import blueprints
+    from .blueprints import admin, auth, error, fileio, info, klausuren, schueler
+    from .blueprints.admin import lehrer as admin_lehrer
+    app.register_blueprint(blueprints.bp)
+    app.register_blueprint(admin.bp)
+    app.register_blueprint(admin_lehrer.bp, name="admin.lehrer")
+    app.register_blueprint(auth.bp)
+    app.register_blueprint(error.bp)
+    app.register_blueprint(fileio.bp)
+    app.register_blueprint(info.bp)
+    app.register_blueprint(klausuren.bp)
+    app.register_blueprint(schueler.bp)

nateman/assigner.py

@@ -0,0 +1,186 @@
+# NateMan – Nachschreibtermin-Manager
+# assigner.py
+# Copyright © 2020  Johannes Bingel
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# Zuordenen Methode
+from typing import List
+
+
+def iscoopLk(kurs: List):
+    for k in kurs:
+        if k.schueler.stammschule is not None:
+            return True
+    return False
+
+
+def zuordnen(k_schueler):
+    # initziert Variablen
+    termin_1_kurse: [int, int] = []
+    termin_2_kurse: [int, int] = []
+
+    probleme_kurse = []
+
+    termin_1_kurse_s = []
+    termin_2_kurse_s = []
+    probleme_kurse_s = []
+
+    if len(k_schueler) != 0:
+        s_list = [[k_schueler.pop(0)]]
+
+        # Ordnet die Schüler den ihren Kursen zu
+        i = 0
+
+        for s in k_schueler:
+            while i < len(s_list):
+                if s.klausur.id == s_list[i][0].klausur.id:
+                    s_list[i].append(s)
+                    break
+                i += 1
+            else:
+                s_list.append([s])
+            i = 0
+        del i
+
+        # Findet und speichert die Konflikte in ein Dictionary
+        h_list = []
+
+        dic = {}
+
+        i = 0
+        i2 = 0
+        i3 = 0
+        i4 = 0
+
+        while i < len(s_list):
+            while i2 < len(s_list[i]):
+                while i3 < len(s_list):
+                    while i4 < len(s_list[i3]):
+                        if s_list[i][i2].schueler == s_list[i3][i4].schueler and i != i3 and str(i3) not in h_list:
+                            h_list.append(str(i3))
+                        i4 += 1
+                    i3 += 1
+                    i4 = 0
+                i2 += 1
+                i3 = 0
+            if h_list:
+                dic[str(i)] = h_list
+                h_list = []
+            i += 1
+            i2 = 0
+
+        del i
+        del i2
+        del i3
+        del i4
+
+        if dic != {}:
+
+            # Fügt die LKs Termin 1 zu
+            i = 0
+
+            while i < len(s_list):
+                if iscoopLk(s_list[i]) and str(i) in dic:
+                    termin_1_kurse.append(str(i))
+                i += 1
+
+            while i < len(s_list):
+                if s_list[i][0].klausur.kursname[-2] == "L" and str(i) not in termin_1_kurse and str(i) in dic:
+                    termin_1_kurse.append(str(i))
+                i += 1
+
+            del i
+
+            # Ordnet die LKs Fest ein
+            i = 0
+
+            while i < len(termin_1_kurse):
+                if str(i) not in termin_2_kurse:
+                    for kurs in dic[termin_1_kurse[i]]:
+                        if not (kurs in termin_2_kurse):
+                            termin_2_kurse.append(kurs)
+                    i += 1
+                else:
+                    termin_1_kurse.remove(str(i))
+
+            i2 = 0
+
+            if not termin_1_kurse:
+                for d in dic:
+                    termin_1_kurse.append(d)
+                    break
+
+            # Füllt die Termine
+            finished = False
+            while not finished:
+                while not (i >= len(termin_1_kurse) and i2 >= len(termin_2_kurse)):
+                    if i < len(termin_1_kurse):
+                        for kurs in dic[termin_1_kurse[i]]:
+                            if kurs in termin_1_kurse[:i]:
+                                probleme_kurse.append(termin_1_kurse.pop(i))
+                                break
+                        else:
+                            for kurs in dic[termin_1_kurse[i]]:
+                                if not (kurs in termin_2_kurse):
+                                    termin_2_kurse.append(kurs)
+                            i += 1
+
+                    if i2 < len(termin_2_kurse):
+                        for kurs in dic[termin_2_kurse[i2]]:
+                            if kurs in termin_2_kurse[:i2]:
+                                probleme_kurse.append(termin_2_kurse.pop(i2))
+                                break
+                        else:
+                            for kurs in dic[termin_2_kurse[i2]]:
+                                if not (kurs in termin_1_kurse):
+                                    termin_1_kurse.append(kurs)
+                            i2 += 1
+                probleme_kurse = list(set(probleme_kurse))
+
+                for kurs in dic:
+                    if kurs not in termin_1_kurse and kurs not in termin_2_kurse \
+                            and kurs not in probleme_kurse:
+                        termin_2_kurse.append(kurs)
+                        break
+                else:
+                    finished = True
+
+        # Ordnet die nicht problematischen Kurse zu
+
+        i = 0
+        while i < len(s_list):
+            if str(i) not in termin_1_kurse and str(i) not in termin_2_kurse and str(i) not in probleme_kurse:
+                termin_1_kurse.append(str(i))
+            i += 1
+
+        for kurs in termin_1_kurse:
+            for s in s_list[int(kurs)]:
+                termin_1_kurse_s.append(s)
+
+        for kurs in termin_2_kurse:
+            for s in s_list[int(kurs)]:
+                termin_2_kurse_s.append(s)
+
+        for kurs in probleme_kurse:
+            for s in s_list[int(kurs)]:
+                probleme_kurse_s.append(s)
+
+        k_schueler.insert(0, s_list[0][0])
+
+        # Ruft die Methode rekursiv auf bis keine Problemkurse vorhanden sind
+        if not probleme_kurse_s:
+            return [termin_1_kurse_s, termin_2_kurse_s]
+        else:
+            return [termin_1_kurse_s] + [termin_2_kurse_s] + zuordnen(probleme_kurse_s)

nateman/blueprints/__init__.py

@@ -0,0 +1,33 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/__init__.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Index-Blueprint
+"""
+
+from flask import Blueprint, g, redirect, url_for, render_template
+
+bp = Blueprint("index", __name__)
+
+
+@bp.route("/")
+def index():
+    """ Startseite (Pfad ``/``, leitet bei angemeldetem Lehrer auf Klausurseite um) """
+    if g.lehrer is not None:
+        return redirect(url_for("klausuren.mine"), code=303)
+    else:
+        return render_template("index/index.html.j2")

nateman/blueprints/admin/__init__.py

@@ -0,0 +1,69 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/admin/__init__.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Administrations-Blueprint
+"""
+
+from flask import Blueprint, flash, g, redirect, render_template, request, url_for, current_app
+from sqlalchemy.exc import StatementError
+
+from ..auth import admin_required
+from ...models import db
+
+bp = Blueprint("admin", __name__, url_prefix="/admin")
+
+
+@bp.route("/")
+@admin_required
+def index():
+    """ enthält Links zur Administration (Seite *Administration*)"""
+    return render_template("admin/index.html.j2")
+
+
+@bp.route("/sql-access", methods=("GET", "POST"))
+@admin_required
+def sql_access():
+    """ SQL-Zugriffsseite """
+    reload_response = redirect(url_for(".sql_access"), code=303)
+
+    if request.method != "POST":
+        return render_template("admin/sql_access.html.j2", query="", result=None)
+
+    # ELSE
+
+    query = request.form["query"].strip()
+
+    if not query:
+        flash("Bitte geben Sie eine SQL-Abfrage ein.", "error")
+        return reload_response
+
+    # Query ausführen
+    try:
+        result = db.session.execute(query)
+    except StatementError as exc:
+        flash(f"Die SQL-Abfrage konnte nicht ausgeführt werden.\n\nFehlerbeschreibung:\n{exc.orig}", "error")
+        return render_template("admin/sql_access.html.j2", query=query, result=None)
+
+    if not result.returns_rows:
+        db.session.commit()
+
+    logged_query = query.replace('\r\n', ' ').replace('\n', ' ')
+    current_app.logger.info(f"{g.lehrer} hat eine SQL-Abfrage ausgeführt: {logged_query}")
+    flash("Die SQL-Abfrage wurde erfolgreich ausgeführt.", "success")
+
+    return render_template("admin/sql_access.html.j2", query=query, result=result)

nateman/blueprints/admin/lehrer.py

@@ -0,0 +1,206 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/admin/lehrer.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Lehrerkonten-Administrations-Blueprint
+"""
+
+from flask import Blueprint, abort, current_app, flash, g, redirect, render_template, request, url_for
+
+from ..auth import admin_required
+from ... import util
+from ...models import Lehrer, Stufe, db
+
+bp = Blueprint("lehrer", __name__, url_prefix="/admin/lehrer")
+
+
+@bp.route("/")
+@admin_required
+def index():
+    """ Lehrerliste """
+    return render_template("admin/lehrer/index.html.j2")
+
+
+@bp.route("/<int:lehrer_id>", methods=("GET", "POST"))
+@admin_required
+def edit(lehrer_id):
+    """ Lehrerbearbeitung """
+    lehrer: Lehrer = Lehrer.query.filter_by(id=lehrer_id).first()
+
+    # HTTP 404 Fehler erzeugen, wenn kein Lehrer unter der ID gefunden wurde
+    if not lehrer:
+        abort(404)
+        return
+
+    if request.method != "POST":
+        return render_template("admin/lehrer/edit.html.j2", lehrer=lehrer)
+
+    # ELSE
+
+    action = request.form["action"]
+
+    # Benutzerdaten ändern
+    if action == "change-credentials":
+        new_kuerzel = request.form["new-kuerzel"].strip()
+        new_email = request.form["new-email"].strip() or None
+        new_password = request.form["new-password"]
+
+        new_beraet_name = request.form["new-beraet"]
+
+        new_is_admin = ("new-admin" in request.form)
+
+        error_msg = None
+
+        change_kuerzel = False
+        change_email = False
+        change_password = False
+        change_beraet = False
+        change_is_admin = False
+
+        # Neues Kürzel, falls angegeben und nicht das aktuelle Kürzel
+        if new_kuerzel and new_kuerzel != lehrer.kuerzel:
+            change_kuerzel = True
+            # existiert das Kürzel bereits?
+            if Lehrer.query.filter_by(kuerzel=new_kuerzel).count() != 0:
+                error_msg = "Das angegebene Kürzel ist bereits registriert."
+
+        # Neue E-Mail-Adresse, falls angegeben und nicht die aktuelle Adresse
+        if new_email != lehrer.email:
+            change_email = True
+            # ist die neue E-Mail-Adresse syntaktisch ungültig?
+            if new_email is not None and not util.EMAIL_ADDRESS_REGEX.match(new_email):
+                error_msg = "Bitte geben Sie eine gültige E-Mail-Adresse ein."
+
+        # Neues Passwort, falls angegeben
+        if new_password:
+            change_password = True
+            # ist das neue Passwort zu groß?
+            if not util.validate_bcrypt_password(new_password):
+                error_msg = "Das neue Passwort darf höchstens 72 Zeichen lang sein."
+
+        if new_beraet_name == "":
+            new_beraet = None
+        else:
+            new_beraet = Stufe.query.filter_by(name=new_beraet_name).first()
+            if new_beraet is None:
+                abort(400)
+                return
+
+        if new_beraet != lehrer.beraet:
+            change_beraet = True
+
+        # Administratorstatus ändern
+        if new_is_admin != lehrer.is_admin:
+            change_is_admin = True
+
+        # Änderungen vornehmen, falls kein Fehler aufgetreten ist
+        if error_msg is not None:
+            # Es ist ein Fehler aufgetreten
+            flash(error_msg, "error")
+            return redirect(url_for(".edit", lehrer_id=lehrer_id), code=303)
+
+        if not (change_kuerzel or change_email or change_password or change_beraet or change_is_admin):
+            flash("Es wurde nichts geändert.", "error")
+            return redirect(url_for(".edit", lehrer_id=lehrer_id), code=303)
+
+        if change_kuerzel:
+            old_kuerzel = lehrer.kuerzel
+            lehrer.kuerzel = new_kuerzel
+            current_app.logger.info(f"{g.lehrer} hat das Lehrerkürzel des Kontos mit der ID {lehrer.id}"
+                                    f" von {old_kuerzel} auf {new_kuerzel} geändert.")
+
+        if change_email:
+            # E-Mail-Adresse wird als confirmed markiert, wenn ein Admin sie ändert
+            lehrer.email = new_email
+            lehrer.confirmation_token = None
+            lehrer.is_confirmed = True
+            current_app.logger.info(f"{g.lehrer} hat die E-Mail-Adresse von {lehrer} auf {new_email} gesetzt.")
+
+        if change_password:
+            lehrer.set_password(new_password)
+            current_app.logger.info(f"{g.lehrer} hat das Passwort von {lehrer} geändert.")
+
+        if change_beraet:
+            lehrer.beraet = new_beraet
+            if new_beraet:
+                current_app.logger.info(f"{g.lehrer} hat {lehrer} als Beratungslehrer(in) für die {new_beraet.name} "
+                                        f"festgelegt.")
+            else:
+                current_app.logger.info(f"{g.lehrer} hat den Beratungslehrerstatus von {lehrer} entfernt.")
+
+        if change_is_admin:
+            lehrer.is_admin = new_is_admin
+            if new_is_admin:
+                current_app.logger.info(f"{g.lehrer} hat {lehrer} den Administratorstatus vergeben.")
+            else:
+                current_app.logger.info(f"{g.lehrer} hat {lehrer} den Administratorstatus entfernt.")
+
+        db.session.commit()
+        flash("Benutzerdaten erfolgreich geändert.", "success")
+        return redirect(url_for(".edit", lehrer_id=lehrer_id), code=303)
+
+    # Account löschen
+    elif action == "delete-account":
+        current_app.logger.info(f"{g.lehrer} hat das Konto {lehrer} gelöscht.")
+
+        db.session.delete(lehrer)
+        db.session.commit()
+        flash("Benutzerkonto erfolgreich gelöscht.", "success")
+
+        return redirect(url_for(".index"), code=303)
+
+    abort(400)  # Bad Request, wenn ungültige action
+
+
+@bp.route("/add", methods=("GET", "POST"))
+@admin_required
+def add():
+    """ Lehrerhinzufügung """
+    if request.method != "POST":
+        return render_template("admin/lehrer/add.html.j2")
+
+    # ELSE
+
+    kuerzel = request.form["kuerzel"]
+    password = request.form["password"]
+    force_pwd_change = ("force-password-change" in request.form)
+
+    error_msg = None
+
+    # existiert das Kürzel bereits?
+    if Lehrer.query.filter_by(kuerzel=kuerzel).count() != 0:
+        error_msg = "Ein(e) Lehrer(in) mit diesem Kürzel existiert bereits."
+
+    # ist das neue Passwort zu groß?
+    elif not util.validate_bcrypt_password(password):
+        error_msg = "Das neue Passwort darf höchstens 72 Zeichen lang sein."
+
+    if error_msg:
+        flash(error_msg, "error")
+        return redirect(url_for(".add"), code=303)
+
+    new_lehrer = Lehrer(kuerzel=kuerzel)
+
+    new_lehrer.set_password(password, set_pwd_changed=not force_pwd_change)
+
+    db.session.add(new_lehrer)
+    db.session.commit()
+
+    flash("Lehrer(in) erfolgreich hinzugefügt.", "success")
+    current_app.logger.info(f"{g.lehrer} hat den/die Lehrer(in) {new_lehrer} hinzugefügt")
+
+    return redirect(url_for(".edit", lehrer_id=new_lehrer.id), code=303)

nateman/blueprints/auth.py

@@ -0,0 +1,477 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/auth.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Authentifizierungs-Blueprint
+"""
+
+import functools
+import time
+from datetime import datetime, timedelta
+from smtplib import SMTPRecipientsRefused
+
+from flask import Blueprint, abort, current_app, flash, g, redirect, render_template, request, url_for, make_response
+
+from .. import emails, util
+from ..config_manager import config
+from ..models import Lehrer, db, Session
+
+bp = Blueprint("auth", __name__)
+
+SESSION_COOKIE_NAME = "login_session"
+
+
+@bp.before_app_request
+def load_logged_in_lehrer():
+    """
+    Lädt den angemeldeten Lehrer vor jeder HTTP-Anfrage in die g.lehrer-Variable.
+    """
+    session_key = request.cookies.get(SESSION_COOKIE_NAME)
+    session = Session.get(session_key)
+
+    g.session = session
+
+    if g.session is None:
+        g.lehrer = None
+    else:
+        g.lehrer = g.session.lehrer
+
+
+@bp.after_app_request
+def clear_rotten_session_cookie(response):
+    """
+    Löscht veraltete Session-Cookies.
+    """
+    if request.cookies.get(SESSION_COOKIE_NAME) and not g.lehrer:
+        response.delete_cookie(SESSION_COOKIE_NAME)
+
+    return response
+
+
+def login_required(view):
+    """
+    Dieser Decorator kann an Views angehängt werden, die einen angemeldeten Lehrer erfordern.
+    """
+
+    @functools.wraps(view)
+    def wrapped_view(**kwargs):
+
+        # Kein Lehrer angemeldet?
+        if g.lehrer is None:
+            flash("Bitte melden Sie sich an.", "error")
+            return redirect(url_for("auth.login", r=request.path), code=303)
+
+        # muss der Lehrer sein Passwort ändern?
+        if g.lehrer and not g.lehrer.pwd_changed:
+            return redirect(url_for("auth.password_change"), code=303)
+
+        return view(**kwargs)
+
+    return wrapped_view
+
+
+def beratungslehrer_required(view):
+    """
+    Dieser Decorator kann an Views angehängt werden,
+    die einen angemeldeten Beratungslehrer oder Administrator erfordern.
+    """
+
+    @functools.wraps(view)
+    def wrapped_view(**kwargs):
+
+        # Kein Lehrer angemeldet?
+        if g.lehrer is None:
+            flash("Bitte melden Sie sich an.", "error")
+            return redirect(url_for("auth.login", r=request.path), code=303)
+
+        # Lehrer kein Beratungslehrer oder Administrator?
+        if not g.lehrer.can_access():
+            abort(403)
+            return
+
+        # muss der Lehrer sein Passwort ändern?
+        if g.lehrer and not g.lehrer.pwd_changed:
+            return redirect(url_for("auth.password_change"), code=303)
+
+        return view(**kwargs)
+
+    return wrapped_view
+
+
+def admin_required(view):
+    """
+    Dieser Decorator kann an Views angehängt werden, die einen angemeldeten Administrator erfordern.
+    """
+
+    @functools.wraps(view)
+    def wrapped_view(**kwargs):
+
+        # Kein Lehrer angemeldet?
+        if g.lehrer is None:
+            flash("Bitte melden Sie sich an.", "error")
+            return redirect(url_for("auth.login", r=request.path), code=303)
+
+        # Lehrer kein Administrator?
+        if not g.lehrer.is_admin:
+            abort(403)
+            return
+
+        # muss der Lehrer sein Passwort ändern?
+        if g.lehrer and not g.lehrer.pwd_changed:
+            return redirect(url_for("auth.password_change"), code=303)
+
+        return view(**kwargs)
+
+    return wrapped_view
+
+
+@bp.route("/login", methods=("GET", "POST"))
+def login():
+    """ Anmeldung (Seite *Anmelden*)"""
+    if request.method != "POST":
+        return render_template("auth/login.html.j2")
+
+    # ELSE
+
+    request_start_time = time.process_time()
+
+    kuerzel = request.form["kuerzel"].strip()
+    password = request.form["password"]
+    remember_me = ("remember-me" in request.form)
+
+    error = False
+
+    lehrer = Lehrer.query.filter_by(kuerzel=kuerzel).first()
+
+    # existiert Lehrer nicht?
+    if lehrer is None:
+        error = True
+        current_app.logger.info(f"Fehlgeschlagener Anmeldeversuch von {request.remote_addr} "
+                                f"(Ungültiges Kürzel '{kuerzel}')")
+
+    # ist das Passwort falsch?
+    elif not lehrer.check_password(password):
+        error = True
+        current_app.logger.info(f"Fehlgeschlagener Anmeldeversuch von {request.remote_addr} "
+                                f"(Falsches Passwort für {lehrer.kuerzel})")
+
+    if error:
+        # Bei fehlgeschlagenem Anmeldeversuch 2 Sekunden vor Antwort warten
+        time.sleep(request_start_time - time.process_time() + 2)
+        flash("Ungültige Anmeldedaten.", "error")
+        return redirect(url_for(".login", r=request.args.get("r", None)), code=303)
+
+    # Kein Fehler -> Lehrer anmelden
+
+    current_app.logger.info(f"{lehrer} hat sich angemeldet.")
+
+    session_expiry_delta = timedelta(days=12) if remember_me else timedelta(hours=1)
+    session = Session.create(lehrer, session_expiry_delta)
+
+    if not lehrer.pwd_changed:
+        red = redirect(url_for(".password_change"), code=303)
+
+    else:
+        redirect_path = request.args.get("r", None)
+        # Wenn ein Weiterleitungspfad als GET-Parameter übergeben wurde
+        # (wie es z.B. der login_required-Wrapper macht, wenn kein Benutzer
+        # angemeldet ist), auf diesen Pfad weiterleiten, falls er mit einem
+        # Schrägstrich beginnt (also kein externer Link ist).
+        if redirect_path and len(redirect_path) > 0 and redirect_path[0] == "/":
+            red = redirect(redirect_path, code=303)
+        else:
+            red = redirect(url_for("klausuren.mine"), code=303)
+
+    db.session.commit()
+
+    resp = make_response(red)
+    resp.set_cookie(SESSION_COOKIE_NAME, session.key,
+                    max_age=session_expiry_delta.total_seconds() if remember_me else None,
+                    expires=session.expiry if remember_me else None, secure=config["uses-ssl"], httponly=True,
+                    samesite="Strict")
+    return resp
+
+
+@bp.route("/logout")
+def logout():
+    """ Abmeldung (Seite *Abmelden*)"""
+    resp = make_response(redirect(url_for("auth.login"), code=303))
+    if g.lehrer:
+        current_app.logger.info(f"{g.lehrer} hat sich abgemeldet.")
+        resp.delete_cookie("login_session")
+        db.session.delete(g.session)
+        db.session.commit()
+
+    return resp
+
+
+@bp.route("/confirm-email")
+def confirm_email():
+    """ Emailbestätigung """
+    red = redirect(url_for(".login" if g.lehrer is None else "klausuren.mine"), code=303)
+
+    token = request.args.get("token", None)
+
+    if token is None:
+        flash("Ungültiger/veralteter Bestätigungslink.", "alert")
+        return red
+
+    lehrer = Lehrer.query.filter_by(confirmation_token=token).first()
+
+    if lehrer is None:
+        flash("Ungültiger/veralteter Bestätigungslink.", "alert")
+        return red
+
+    # ELSE
+
+    lehrer.confirmation_token = None
+    lehrer.is_confirmed = True
+    db.session.commit()
+
+    current_app.logger.info(f"{lehrer} hat die eigene E-Mail-Adresse ({lehrer.email}) bestätigt.")
+    flash("Die E-Mail-Adresse wurde erfolgreich bestätigt.", "success")
+
+    return red
+
+
+@bp.route("/password-change", methods=("GET", "POST"))
+def password_change():
+    """ Passwortänderung nach erstem Login """
+    # login_required kann hier nicht verwendet werden,
+    # da es ein verändertes Passwort erfordert
+    if not g.lehrer:
+        return redirect(url_for("auth.login"), code=303)
+
+    if g.lehrer.pwd_changed:
+        return redirect(url_for(".account"), code=303)
+
+    if request.method != "POST":
+        return render_template("auth/password-change.html.j2")
+
+    # ELSE
+
+    new_pass = request.form["new-password"]
+    new_pass_confirm = request.form["new-password-confirm"]
+
+    error_msg = None
+
+    if not new_pass or not new_pass_confirm:
+        error_msg = "Bitte geben Sie ein neues Passwort ein."
+
+    # ist das neue Passwort kürzer als 6 Zeichen?
+    if len(new_pass) < 6:
+        error_msg = "Das neue Passwort muss mindestens 6 Zeichen lang sein."
+    # ist das neue Passwort zu groß?
+    elif not util.validate_bcrypt_password(new_pass):
+        error_msg = "Das neue Passwort darf höchstens 72 Zeichen lang sein."
+    # stimmen die neuen Passwörter nicht überein?
+    elif new_pass != new_pass_confirm:
+        error_msg = "Die neuen Passwörter stimmen nicht überein."
+
+    # Änderungen vornehmen, falls kein Fehler aufgetreten ist
+    if error_msg:
+        # Es ist ein Fehler aufgetreten
+        flash(error_msg, "error")
+        return redirect(url_for(".account"), code=303)
+
+    g.lehrer.set_password(new_pass)
+    db.session.commit()
+
+    current_app.logger.info(f"{g.lehrer} hat das eigene Passwort geändert.")
+
+    return redirect(url_for("klausuren.mine"), code=303)
+
+
+@bp.route("/password-reset", methods=("GET", "POST"))
+def password_reset():
+    """ Passwortzurücksetzung (Seite *Passwort vergessen*)"""
+    red = redirect(url_for(".login" if g.lehrer is None else "klausuren.mine"), code=303)
+
+    token = request.args.get("token", None)
+
+    t_lehrer = None
+    if token is not None:
+        t_lehrer = Lehrer.query.filter_by(password_reset_token=token).first()
+
+        expired = False
+        if t_lehrer is not None:
+            expired = t_lehrer.password_reset_expiry < datetime.utcnow()
+            if expired:
+                t_lehrer.password_reset_token = None
+                t_lehrer.password_reset_expiry = None
+                db.session.commit()
+
+        if t_lehrer is None or expired:
+            flash("Ungültiger/veralteter Zurücksetzungslink.", "alert")
+            return red
+
+    if request.method == "POST":
+        if token is None:
+            # --- Antragstellung ---
+            lehrer_kuerzel = request.form["lehrer-kuerzel"]
+            email_address = request.form["email-address"]
+
+            lehrer = Lehrer.query.filter_by(kuerzel=lehrer_kuerzel, email=email_address).first()
+
+            if lehrer is None:
+                flash("Es gibt keine(n) Lehrer(in) mit den angegebenen Kriterien.", "error")
+                return redirect(url_for(".password_reset"), code=303)
+
+            if not lehrer.is_confirmed:
+                flash("Es gibt eine(n) Lehrer(in) mit den angegebenen Kriterien, allerdings ist dessen/deren "
+                      "E-Mail-Adresse nicht bestätigt.\nWenden Sie sich an eine(n) Administrator(in).", "error")
+                return redirect(url_for(".password_reset"), code=303)
+
+            new_token = util.random_uri_safe_string(64)
+            lehrer.password_reset_token = new_token
+            lehrer.password_reset_expiry = datetime.utcnow() + timedelta(hours=1)
+
+            # Zurücksetzungsemail senden
+            try:
+                emails.send_password_reset_mail(lehrer.email, new_token)
+            except SMTPRecipientsRefused:
+                flash(f"Es konnte keine E-Mail an {lehrer.email} gesendet werden.\n"
+                      f"Wahrscheinlich existiert diese Adresse nicht mehr.\n"
+                      f"Wenden Sie sich an eine(n) Administrator(in).", "error")
+                return redirect(url_for(".password_reset"), code=303)
+
+            db.session.commit()
+
+            flash("Sie müssten nun eine E-Mail bekommen mit einem Link, über den Sie Ihr Passwort ändern können.\n"
+                  "Der Link ist eine Stunde lang gültig.", "success")
+            current_app.logger.info(f"Für {lehrer} wurde eine Passwortzurücksetzung beantragt.")
+
+        else:
+            # --- Passwortänderung ---
+            new_pass = request.form["new-password"]
+            new_pass_confirm = request.form["new-password-confirm"]
+            error_msg = None
+            # ist das neue Passwort kürzer als 6 Zeichen?
+            if len(new_pass) < 6:
+                error_msg = "Das neue Passwort muss mindestens 6 Zeichen lang sein."
+            # ist das neue Passwort zu groß?
+            elif not util.validate_bcrypt_password(new_pass):
+                error_msg = "Das neue Passwort darf höchstens 72 Zeichen lang sein."
+            # stimmen die neuen Passwörter nicht überein?
+            elif new_pass != new_pass_confirm:
+                error_msg = "Die neuen Passwörter stimmen nicht überein."
+
+            if error_msg:
+                flash(error_msg, "error")
+                return redirect(url_for(".password_reset", token=token), code=303)
+
+            # ELSE
+
+            t_lehrer.password_reset_token = None
+            t_lehrer.set_password(new_pass)
+            db.session.commit()
+
+            current_app.logger.info(f"{t_lehrer} hat das eigene Passwort zurückgesetzt.")
+            flash("Das Passwort wurde erfolgreich zurückgesetzt.", "success")
+
+        return red
+
+    else:
+        if token is None:
+            # --- Formular zur Antragstellung ---
+            return render_template("auth/password-reset-send.html.j2")
+        else:
+            # --- Formular zur Passwortänderung ---
+            return render_template("auth/password-reset-do.html.j2")
+
+
+@bp.route("/account", methods=("GET", "POST"))
+@login_required
+def account():
+    """ Kontoeinstellungen (Seite *Mein Konto*) """
+    if request.method != "POST":
+        return render_template("auth/account.html.j2")
+
+    # ELSE
+
+    current_password = request.form["current-password"]
+    new_email = request.form["new-email"].strip() or None
+    new_pass = request.form["new-password"]
+    new_pass_confirm = request.form["new-password-confirm"]
+
+    error_msg = None
+
+    change_kuerzel = False
+    change_email = False
+    change_password = False
+
+    # ist das aktuelle Passwort falsch?
+    if not g.lehrer.check_password(current_password):
+        error_msg = "Falsches aktuelles Passwort."
+    else:
+        # Neue E-Mail-Adresse, falls angegeben und nicht die aktuelle Adresse
+        if new_email != g.lehrer.email:
+            change_email = True
+            # ist die neue E-Mail-Adresse syntaktisch ungültig?
+            if new_email is not None and not util.EMAIL_ADDRESS_REGEX.match(new_email):
+                error_msg = "Bitte geben Sie eine gültige E-Mail-Adresse ein."
+
+        # Neues Passwort, falls angegeben
+        if new_pass:
+            change_password = True
+            # ist das neue Passwort kürzer als 6 Zeichen?
+            if len(new_pass) < 6:
+                error_msg = "Das neue Passwort muss mindestens 6 Zeichen lang sein."
+            # ist das neue Passwort zu groß?
+            elif not util.validate_bcrypt_password(new_pass):
+                error_msg = "Das neue Passwort darf höchstens 72 Zeichen lang sein."
+            # stimmen die neuen Passwörter nicht überein?
+            elif new_pass != new_pass_confirm:
+                error_msg = "Die neuen Passwörter stimmen nicht überein."
+
+    # Änderungen vornehmen, falls kein Fehler aufgetreten ist
+    if error_msg:
+        # Es ist ein Fehler aufgetreten
+        flash(error_msg, "error")
+        return redirect(url_for(".account"), code=303)
+
+    # ELSE
+    if not change_kuerzel and not change_email and not change_password:
+        return redirect(url_for(".account"), code=303)
+
+    if change_email:
+        if new_email is not None:
+            token = util.random_uri_safe_string(32)
+            # Bestätigungsemail senden
+            try:
+                emails.send_confirmation_link_mail(new_email, token)
+            except SMTPRecipientsRefused:
+                flash(f"Wir konnten keine Bestätigungsemail an {new_email} senden. "
+                      f"Wahrscheinlich existiert diese Adresse nicht.", "error")
+                return redirect(url_for(".account"), code=303)
+
+            g.lehrer.confirmation_token = token
+
+        old_email = g.lehrer.email
+        g.lehrer.email = new_email
+        g.lehrer.is_confirmed = new_email is None
+
+        current_app.logger.info(f"{g.lehrer} hat die eigene E-Mail-Adresse von {old_email} "
+                                f"auf {g.lehrer.email} geändert.")
+
+    if change_password:
+        g.lehrer.set_password(new_pass)
+        current_app.logger.info(f"{g.lehrer} hat das eigene Passwort geändert.")
+
+    db.session.commit()
+    flash("Benutzerdaten erfolgreich geändert.", "success")
+    return redirect(url_for(".account"), code=303)

nateman/blueprints/error.py

@@ -0,0 +1,48 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/error.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält ausschließlich Errorhandler.
+"""
+
+from flask import Blueprint, render_template
+
+bp = Blueprint("error", __name__)
+
+
+@bp.app_errorhandler(400)
+def error_400(error):
+    """400 - Ungültige Anfrage"""
+    return render_template("error/400.html.j2"), 400
+
+
+@bp.app_errorhandler(403)
+def error_403(error):
+    """403 - Verboten"""
+    return render_template("error/403.html.j2"), 403
+
+
+@bp.app_errorhandler(404)
+def error_404(error):
+    """404 - Seite nicht gefunden"""
+    return render_template("error/404.html.j2"), 404
+
+
+@bp.app_errorhandler(500)
+def error_500(error):
+    """500 - serverseitiger Fehler"""
+    return render_template("error/500.html.j2"), 500

nateman/blueprints/fileio.py

@@ -0,0 +1,163 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/fileio.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Export- und Import-Blueprint
+"""
+import os
+import tempfile
+from datetime import datetime
+
+from flask import abort, Blueprint, current_app, g, redirect, url_for, flash, request, render_template
+from openpyxl.utils.exceptions import InvalidFileException
+from pyexpat import ExpatError
+
+from .auth import beratungslehrer_required, admin_required
+from .. import exporter, util
+from ..importer import KlausurplanImportError, import_plan, excelimport, KoopSchuelerImportError
+from ..models import db, Stufe, Klausur, Schueler
+
+bp = Blueprint("fileio", __name__)
+
+
+@bp.route("/export")
+@beratungslehrer_required
+def export():
+    """ Export (Seite *Nachschreibplan exportieren*)"""
+    with tempfile.NamedTemporaryFile(prefix="nateman_export_") as fp:
+        exporter.excelexport(fp.name, g.lehrer.accessible_stufen())
+        # XLSX-Datei wird in ``filebytes`` geladen, damit die temporäre Datei gelöscht werden kann
+        fp.seek(0)
+        filebytes = fp.read()
+
+    download_name = "NateMan-Export " + datetime.now().strftime("%Y-%m-%d") + ".xlsx"
+    xlsx_mimetype = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
+    response = current_app.response_class(filebytes, mimetype=xlsx_mimetype)
+    response.headers.set("Content-Disposition", "attachment", filename=download_name)
+
+    return response
+
+
+@bp.route("/import", methods=("GET", "POST"), endpoint="import")
+@admin_required
+def import_():
+    """ Import (Seite *Klausurpläne importieren*) """
+    if request.method != "POST":
+        return render_template("fileio/import.html.j2")
+
+    # ELSE
+
+    all_stufen = Stufe.query.all()
+
+    for stufe in all_stufen:
+        if "del_" + stufe.name in request.form:
+            if not g.lehrer.can_access(stufe):
+                abort(400)
+                return
+
+            _del_plan(stufe)
+            db.session.commit()
+
+            flash("Klausurplan erfolgreich gelöscht.", "success")
+            current_app.logger.info(f"{g.lehrer} hat den Klausurplan für die {stufe.name} gelöscht.")
+            return redirect(url_for(".import"), code=303)
+
+    new_lehrer_password = request.form["new-lehrer-password"]
+
+    error_msg = None
+    if not new_lehrer_password:
+        error_msg = "Bitte geben Sie das Passwort für neu registrierte Lehrer(innen) an."
+    elif not util.validate_bcrypt_password(new_lehrer_password):
+        error_msg = "Das Passwort für neue Lehrer(innen) darf nicht mehr als 72 Zeichen enthalten."
+    if error_msg is not None:
+        flash(error_msg, "error")
+        return redirect(url_for(".import"), code=303)
+
+    plan_given = []
+
+    for stufe in all_stufen:
+        plan = request.files.get("plan_" + stufe.name, None)
+
+        # Klausurplan importieren
+        if plan and plan.filename:
+            plan_given.append(stufe.name)
+
+            _del_plan(stufe)
+
+            try:
+                import_plan(plan, stufe, new_lehrer_password)
+            except (KeyError, ValueError, ExpatError, KlausurplanImportError) as exc:
+                db.session.rollback()
+
+                flash(f"Beim Importieren des Klausurplans für die {stufe.name} ist ein Fehler aufgetreten.\n"
+                      f"Wahrscheinlich ist die Klausurplandatei ungültig oder es gibt einen Konflikt mit den "
+                      f"bisherigen Daten.\n\nFehlerbeschreibung: {type(exc).__name__}\n{exc}", "error")
+
+                current_app.logger.warning(f"Beim Versuch von {g.lehrer}, einen Klausurplan zu importieren, "
+                                           f"ist ein Fehler aufgetreten.", exc_info=exc)
+                return redirect(url_for(".import"), code=303)
+
+    ks_file = request.files.get("koopschueler", None)
+    ks_file_given = False
+
+    # Koopschülerdatei importieren
+    ks_import_failures = []
+    if ks_file and ks_file.filename:
+        ks_file_given = True
+        _del_koopschueler()
+
+        filename_ext = os.path.splitext(ks_file.filename)[1]
+        with tempfile.NamedTemporaryFile(prefix="nateman_ks_import_", suffix=filename_ext) as fp:
+            ks_file.save(fp.name)
+
+            try:
+                ks_import_failures = excelimport(fp.name)
+            except (InvalidFileException, KoopSchuelerImportError) as exc:
+                db.session.rollback()
+
+                flash(f"Beim Importieren der Koopschülerliste ist ein Fehler aufgetreten.\n\n"
+                      f"Fehlerbeschreibung: {type(exc).__name__}\n{exc}", "error")
+
+                current_app.logger.warning(f"Beim Versuch von {g.lehrer}, eine Koopschülerliste zu importieren, "
+                                           f"ist ein Fehler aufgetreten.", exc_info=exc)
+            return redirect(url_for(".import"), code=303)
+
+    if len(plan_given) == 0 and not ks_file_given:
+        flash("Es wurden keine Pläne angegeben.", "error")
+    else:
+        if len(ks_import_failures) == 0:
+            flash("Pläne importiert.", "success")
+        else:
+            flash("Pläne importiert.\n\nKoopschülerimport: Folgende SuS konnten nicht importiert werden:\n"
+                  + "; ".join(f"{failure[0]}, {failure[1]}" for failure in ks_import_failures) + ".\n"
+                  "Die restlichen KoopSuS wurden trotzdem importiert.", "warning")
+        current_app.logger.info(f"{g.lehrer} hat Pläne importiert.")
+        db.session.commit()
+
+    return redirect(url_for(".import"), code=303)
+
+
+def _del_plan(stufe: Stufe):
+    """Löscht alle Klausuren und Schüler der angegebenen Stufe"""
+    stufe.import_date = None
+    Klausur.query.filter_by(stufe=stufe).delete()
+    Schueler.query.filter_by(stufe=stufe).delete()
+
+
+def _del_koopschueler():
+    """Löscht alle Koopschüler"""
+    Schueler.query.filter(Schueler.stammschule != None).delete()

nateman/blueprints/info.py

@@ -0,0 +1,30 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/info.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Informations-Blueprint
+"""
+
+from flask import Blueprint, render_template
+
+bp = Blueprint("info", __name__, url_prefix="/info")
+
+
+@bp.route("/licenses")
+def licenses():
+    """ Lizenzen """
+    return render_template("info/licenses.html.j2")

nateman/blueprints/klausuren.py

@@ -0,0 +1,338 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/klausuren.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Klausurlisten-Blueprint
+"""
+
+from datetime import datetime
+
+from flask import Blueprint, abort, current_app, flash, g, redirect, render_template, request, url_for, Response
+
+from .auth import login_required, beratungslehrer_required
+from ..config_manager import config
+from ..models import Klausur, Klausurteilnahme, Koopschule, Lehrer, Schueler, db, \
+    get_next_new_schueler_id, Stufe
+
+bp = Blueprint("klausuren", __name__, url_prefix="/klausuren")
+
+
+@bp.route("/")
+@login_required
+def mine():
+    """ Ansicht der eigenen Klausuren (Seite *Meine Klausuren*) """
+    klausur_query = Klausur.query.filter(Klausur.lehrer == g.lehrer).order_by(Klausur.date.desc())
+
+    klausuren_anstehend = klausur_query.filter(Klausur.date > datetime.now().date()).all()
+    klausuren_vergangen = klausur_query.filter(Klausur.date <= datetime.now().date()).all()
+
+    return render_template("klausuren/mine.html.j2", klausuren_anstehend=klausuren_anstehend,
+                           klausuren_vergangen=klausuren_vergangen)
+
+
+@bp.route("/<stufe_name>/", endpoint="stufe")
+def stufe_(stufe_name):
+    """ Ansicht der Klausuren einer Stufe (Seite *Klausuren [Stufe]*) """
+    stufe = Stufe.query.filter_by(name=stufe_name).first()
+    if stufe is None:
+        abort(404)
+        return
+
+    dates_query = db.session.query(Klausur.date).filter_by(stufe=stufe).order_by(Klausur.date.desc())
+    dates_anstehend = [t.date for t in dates_query.filter(Klausur.date > datetime.now().date()).distinct()]
+    dates_vergangen = [t.date for t in dates_query.filter(Klausur.date <= datetime.now().date()).distinct()]
+
+    return render_template("klausuren/stufe.html.j2", stufe=stufe, dates_anstehend=dates_anstehend,
+                           dates_vergangen=dates_vergangen)
+
+
+@bp.route("/<stufe_name>/add", methods=("GET", "POST"))
+@beratungslehrer_required
+def add(stufe_name):
+    """ Klausurhinzufügung """
+    reload_resp = redirect(url_for(".add", stufe_name=stufe_name), code=303)
+
+    stufe = Stufe.query.filter_by(name=stufe_name).first()
+    if stufe is None:
+        abort(404)
+        return
+
+    if not g.lehrer.can_access(stufe):
+        abort(403)
+        return
+
+    if request.method != "POST":
+        return render_template("klausuren/add.html.j2", stufe=stufe)
+
+    # ELSE
+
+    kursname = request.form["kursname"]
+    lehrer_id = request.form["lehrer"]
+    date_str = request.form["date"]
+    try:
+        startperiod = int(request.form["startperiod"])
+        endperiod = int(request.form["endperiod"])
+    except ValueError:
+        abort(400)
+        return
+
+    if startperiod < 0 or startperiod > endperiod or endperiod.bit_length() > 32:
+        flash("Ungültiger Zeitraum", "error")
+        return reload_resp
+
+    if not kursname:
+        flash("Bitte geben Sie einen Kursnamen an.", "error")
+        return reload_resp
+
+    try:
+        date = datetime.strptime(date_str, "%Y-%m-%d").date()
+    except ValueError:
+        abort(400)
+        return
+
+    lehrer = Lehrer.query.filter_by(id=lehrer_id).first()
+    if lehrer is None:
+        abort(400)
+        return
+
+    new_klausur = Klausur(kursname=kursname, date=date, startperiod=startperiod, endperiod=endperiod, stufe=stufe,
+                          lehrer=lehrer)
+    db.session.add(new_klausur)
+    db.session.commit()
+
+    flash("Die Klausur wurde erfolgreich hinzugefügt.", "success")
+    current_app.logger.info(f"{g.lehrer} hat die Klausur {new_klausur} hinzugefügt.")
+    return redirect(url_for(".edit", klausur_id=new_klausur.id), code=303)
+
+
+@bp.route("/<int:klausur_id>", methods=("GET", "POST"))
+@login_required
+def edit(klausur_id):
+    """ Klausurbearbeitung """
+    klausur = Klausur.query.filter_by(id=klausur_id).first()
+    if klausur is None:
+        abort(404)
+        return
+
+    if not g.lehrer.can_access(klausur.stufe) and klausur.lehrer != g.lehrer:
+        abort(403)
+        return
+
+    # ELSE
+    if request.method != "POST":
+        kt_list = Klausurteilnahme.query \
+            .filter_by(klausur=klausur) \
+            .join(Schueler) \
+            .order_by(Schueler.nachname, Schueler.vorname) \
+            .all()
+
+        not_in_klausur_list = Schueler.query \
+            .filter_by(stufe=klausur.stufe) \
+            .filter(Schueler.id.notin_(db.session.query(Klausurteilnahme.schueler_id).filter_by(klausur=klausur))) \
+            .order_by(Schueler.nachname, Schueler.vorname) \
+            .all()
+
+        return render_template("klausuren/edit.html.j2", klausur=klausur, kt_list=kt_list,
+                               not_in_klausur_list=not_in_klausur_list)
+
+    # ELSE
+    reload_resp = redirect(url_for(".edit", klausur_id=klausur_id), code=303)
+
+    exit_resp: Response
+    if klausur.lehrer == g.lehrer:
+        exit_resp = redirect(url_for(".mine"), code=303)
+    else:
+        exit_resp = redirect(url_for(".stufe", stufe_name=klausur.stufe.name), code=303)
+
+    if klausur.edited and not g.lehrer.can_access(klausur.stufe):
+        abort(400)
+        return
+
+    action = request.form["action"]
+
+    if action == "edit":
+        lehrer_can_access = g.lehrer.can_access(klausur.stufe)
+
+        annotation = request.form["annotation"].strip()
+        flag_as_edited = ("flag-as-edited" in request.form)
+
+        klausur_laenge_str = request.form.get("laenge", None)
+        if lehrer_can_access and not klausur_laenge_str:
+            klausur_laenge = None
+        else:
+            try:
+                klausur_laenge = int(klausur_laenge_str)
+            except ValueError:
+                abort(400)
+                return
+
+            if klausur_laenge not in config["klausuren"]["klausurlaengen"]:
+                abort(400)
+                return
+
+        klausur.laenge = klausur_laenge
+
+        for kt in Klausurteilnahme.query.filter_by(klausur=klausur).all():
+            kt.versaeumt = (f"s_{kt.schueler.id}" in request.form)
+
+        if annotation:
+            if len(annotation) > config["klausuren"]["max-annotation-length"]:
+                abort(400)
+                return
+            klausur.annotation = annotation
+        else:
+            klausur.annotation = None
+
+        if lehrer_can_access:
+            klausur.edited = flag_as_edited
+        else:
+            klausur.edited = True
+
+        current_app.logger.info(f"{g.lehrer} hat die Klausur {klausur} bearbeitet.")
+        flash("Klausur erfolgreich bearbeitet.", "success")
+        db.session.commit()
+
+        return exit_resp
+
+    elif action == "edit-advanced":
+        if not g.lehrer.can_access(klausur.stufe):
+            abort(400)
+            return
+
+        new_lehrer_id = request.form["new-lehrer"]
+        new_date_str = request.form["new-date"]
+        try:
+            new_startperiod = int(request.form["new-startperiod"])
+            new_endperiod = int(request.form["new-endperiod"])
+        except ValueError:
+            abort(400)
+            return
+
+        if new_startperiod < 0 or new_startperiod > new_endperiod or new_endperiod.bit_length() > 32:
+            flash("Ungültiger Zeitraum", "error")
+            return reload_resp
+
+        try:
+            new_date = datetime.strptime(new_date_str, "%Y-%m-%d").date()
+        except ValueError:
+            abort(400)
+            return
+
+        new_lehrer = Lehrer.query.filter_by(id=new_lehrer_id).first()
+        if new_lehrer is None:
+            abort(400)
+            return
+
+        klausur.lehrer = new_lehrer
+        klausur.date = new_date
+        klausur.startperiod = new_startperiod
+        klausur.endperiod = new_endperiod
+
+        current_app.logger.info(f"{g.lehrer} hat die Klausur {klausur} erweitert bearbeitet.")
+        flash("Klausur erfolgreich bearbeitet.", "success")
+        db.session.commit()
+
+        return reload_resp
+
+    elif action == "delete":
+        if not g.lehrer.can_access(klausur.stufe):
+            abort(400)
+            return
+
+        current_app.logger.info(f"{g.lehrer} hat die Klausur {klausur} gelöscht.")
+        flash("Die Klausur wurde erfolgreich gelöscht.", "success")
+
+        db.session.delete(klausur)
+        db.session.commit()
+        return exit_resp
+
+    elif action == "add-schueler":
+        schueler_id = request.form.get("added-schueler", None)
+        add_to = request.form["add-to"]
+
+        if schueler_id is None:
+            flash("Bitte wählen Sie eine(n) Schüler(in) zum Hinzufügen aus.", "error")
+            return reload_resp
+
+        is_new = False
+        if schueler_id == "new-schueler":
+            is_new = True
+            new_schueler_nachname = request.form["new-schueler-nachname"].strip()
+            new_schueler_vorname = request.form["new-schueler-vorname"].strip()
+            new_schueler_stammschule_kuerzel = request.form.get("new-schueler-stammschule", None)
+
+            stammschule = None
+            if new_schueler_stammschule_kuerzel:
+                stammschule = Koopschule.query.filter_by(kuerzel=new_schueler_stammschule_kuerzel).first()
+
+                if stammschule is None:
+                    abort(400)
+                    return
+
+            if not new_schueler_nachname or not new_schueler_vorname:
+                flash("Bitte geben Sie einen vollständigen Namen für den/die neue(n) Schüler(in) an.", "error")
+                return reload_resp
+
+            schueler = Schueler(id=get_next_new_schueler_id(), nachname=new_schueler_nachname,
+                                vorname=new_schueler_vorname, stufe=klausur.stufe,
+                                stammschule=stammschule)
+            db.session.add(schueler)
+
+        else:
+            schueler = Schueler.query.filter_by(id=schueler_id).first()
+            if schueler is None:
+                abort(400)
+                return
+
+        if Klausurteilnahme.query.filter_by(klausur=klausur, schueler=schueler).first() is not None:
+            abort(400)
+            return
+
+        if add_to == "klausur":
+            klausuren = [klausur]
+        elif add_to == "kurs":
+            klausuren = Klausur.query.filter_by(stufe=klausur.stufe).filter_by(kursname=klausur.kursname).all()
+        else:
+            abort(400)
+            return
+
+        for k in klausuren:
+            kt_entity = Klausurteilnahme(klausur=k, schueler=schueler)
+            db.session.add(kt_entity)
+
+        current_app.logger.info(f"{g.lehrer} hat den/die{' neue(n)' if is_new else ''} Schüler(in) {schueler} "
+                                f"zur Klausur {klausur} hinzugefügt.")
+
+        db.session.commit()
+        return reload_resp
+
+    elif action == "remove-schueler":
+        for kt in Klausurteilnahme.query.join(Klausur)\
+                .filter_by(stufe=klausur.stufe)\
+                .filter_by(kursname=klausur.kursname)\
+                .all():
+            if f"r_{kt.schueler.id}" in request.form:
+                db.session.delete(kt)
+                current_app.logger.info(f"{g.lehrer} hat den/die Schüler(in) {kt.schueler} aus der Klausur "
+                                        f"{kt.klausur} entfernt.")
+
+        db.session.commit()
+        return reload_resp
+
+    else:
+        # Bad Request, wenn ungültige action
+        abort(400)

nateman/blueprints/schueler.py

@@ -0,0 +1,61 @@
+# NateMan – Nachschreibtermin-Manager
+# blueprints/schueler.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Schüler-Blueprint
+"""
+from typing import Dict, List, Tuple
+
+from flask import Blueprint, current_app, flash, g, redirect, render_template, request, url_for
+
+from .auth import beratungslehrer_required
+from ..models import Klausurteilnahme, db, Schueler, Klausur, Stufe
+
+bp = Blueprint("schueler", __name__, url_prefix="/schueler")
+
+
+@bp.route("/versaeumnisse/", methods=("GET", "POST"))
+@beratungslehrer_required
+def versaeumnisse():
+    """ Versäumnisliste (Seite *Versäumnisse*) """
+    if request.method != "POST":
+        versaeumt_dict: Dict[Stufe, Tuple[List[Klausurteilnahme], List[Klausurteilnahme]]] = {}
+        for stufe in g.lehrer.accessible_stufen():
+            base_query = Klausurteilnahme.query.join(Schueler).join(Klausur) \
+                .filter(Klausurteilnahme.versaeumt) \
+                .filter(Klausur.stufe == stufe) \
+                .order_by(Schueler.nachname, Schueler.vorname)
+
+            versaeumt_dict[stufe] = (
+                base_query.filter(~Klausurteilnahme.nachgeschrieben).all(),
+                base_query.filter(Klausurteilnahme.nachgeschrieben).all(),
+            )
+
+        return render_template("schueler/versaeumnisse.html.j2", versaeumt_dict=versaeumt_dict)
+
+    # ELSE
+
+    for kt in Klausurteilnahme.query.filter_by(versaeumt=True).all():
+        if g.lehrer.can_access(kt.klausur.stufe):
+            kt.attestiert = (f"a_{kt.klausur.id}:{kt.schueler.id}" in request.form)
+            kt.nachgeschrieben = (f"n_{kt.klausur.id}:{kt.schueler.id}" in request.form)
+
+    current_app.logger.info(f"{g.lehrer} hat die Versäumnisliste bearbeitet.")
+    flash("Versäumnisliste erfolgreich bearbeitet.", "success")
+    db.session.commit()
+
+    return redirect(url_for(".versaeumnisse"), code=303)

nateman/commands.py

@@ -0,0 +1,260 @@
+# NateMan – Nachschreibtermin-Manager
+# commands.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält Befehle zur Verwendung im Terminal (Command Line Interface).
+"""
+
+import click
+from flask.cli import with_appcontext
+
+from nateman.exporter import excelexport
+from nateman.importer import excelimport, KoopSchuelerImportError
+from . import emails, util, assigner
+from .models import Koopschule, Lehrer, Stufe, db, Session
+from .config_manager import config
+
+
+@click.group()
+def cli():
+    """Enthält Befehle zur Steuerung der NateMan-Webanwendung."""
+    pass
+
+
+@click.command("add-lehrer")
+@click.argument("kuerzel", type=click.STRING)
+@click.option("--password", type=click.STRING, default=None)
+@click.option("--admin", is_flag=True)
+@with_appcontext
+def add_lehrer_command(kuerzel, password, admin):
+    """Erstellt einen Lehreraccount."""
+
+    lehrer = Lehrer.query.filter_by(kuerzel=kuerzel).first()
+
+    if lehrer is not None:
+        click.echo("Fehler: Ein(e) Lehrer(in) mit diesem Kürzel ist bereits registriert.", err=True)
+        return 1
+
+    if not password:
+        password = click.prompt("Neues Passwort eingeben (unsichtbar)", hide_input=True)
+
+    if not util.validate_bcrypt_password(password):
+        click.echo("Fehler: Das Passwort darf höchstens 72 Bytes groß sein.", err=True)
+        return 1
+
+    new_lehrer = Lehrer(kuerzel=kuerzel, is_admin=admin)
+    new_lehrer.set_password(password)
+    db.session.add(new_lehrer)
+    db.session.commit()
+
+    click.echo("Lehrer(in) wurde erfolgreich registriert.")
+    return 0
+
+
+@click.command("add-stufe")
+@click.argument("names", type=click.STRING, nargs=-1)
+@with_appcontext
+def add_stufe_command(names):
+    """Fügt eine neue Stufe zur Datenbank hinzu."""
+
+    if len(names) == 0:
+        click.echo("Fehler: Bitte geben Sie mindestens eine Stufe an.", err=True)
+        return 1
+
+    for name in names:
+        if util.is_integer_string(name):
+            click.echo(f"Fehler: Stufenname darf keine Ganzzahl sein.", err=True)
+            return 1
+
+        stufe = Stufe.query.filter_by(name=name).first()
+
+        if stufe is not None:
+            click.echo(f"Fehler: Die Stufe {name} existiert bereits.", err=True)
+            return 1
+
+        new_stufe = Stufe(name=name)
+        db.session.add(new_stufe)
+
+    db.session.commit()
+
+    click.echo("Die Stufe(n) wurde(n) erfolgreich hinzugefügt.")
+    return 0
+
+
+@click.command("remove-stufe")
+@click.argument("name", type=click.STRING)
+@click.option("--yes", is_flag=True)
+@with_appcontext
+def remove_stufe_command(name, yes):
+    """Entfernt eine Stufe und alle mit ihr verknüpften Daten von der Datenbank."""
+
+    stufe = Stufe.query.filter_by(name=name).first()
+
+    if stufe is None:
+        click.echo("Fehler: Diese Stufe existiert nicht.", err=True)
+        return 1
+
+    if not yes:
+        if not click.confirm(f"Durch diesen Vorgang werden alle mit der Stufe {stufe.name} verknüpften Daten gelöscht. "
+                             f"Fortfahren?"):
+            click.echo("Vorgang abgebrochen.")
+            return 0
+
+    db.session.delete(stufe)
+    db.session.commit()
+
+    click.echo("Die Stufe wurde erfolgreich entfernt.")
+    return 0
+
+
+@click.command("add-koopschule")
+@click.argument("kuerzel", type=click.STRING)
+@click.argument("name", type=click.STRING)
+@with_appcontext
+def add_koopschule_command(kuerzel, name):
+    """Fügt eine Koop-Schule zur Datenbank hinzu."""
+    koop_schule = Koopschule.query.filter_by(name=name).first()
+
+    if koop_schule is not None:
+        click.echo(f"Fehler: Eine Koop-Schule mit dem Kürzel {kuerzel} existiert bereits.", err=True)
+        return 1
+
+    new_koop_schule = Koopschule(kuerzel=kuerzel, name=name)
+    db.session.add(new_koop_schule)
+
+    db.session.commit()
+
+    click.echo("Die Koop-Schule wurde erfolgreich hinzugefügt.")
+    return 0
+
+
+@click.command("remove-koopschule")
+@click.argument("kuerzel", type=click.STRING)
+@with_appcontext
+def remove_koopschule_command(kuerzel):
+    """Entfernt eine Koop-Schule und alle mit ihr verknüpften Daten von der Datenbank."""
+
+    koop_schule = Koopschule.query.filter_by(kuerzel=kuerzel).first()
+
+    if koop_schule is None:
+        click.echo(f"Fehler: DEine Koop-Schule mit dem Kürzel {kuerzel} existiert nicht.", err=True)
+        return 1
+
+    db.session.delete(koop_schule)
+    db.session.commit()
+
+    click.echo("Die Koop-Schule wurde erfolgreich entfernt.")
+    return 0
+
+
+@click.command("make-admin")
+@click.argument("kuerzel")
+@with_appcontext
+def make_admin_command(kuerzel):
+    """Gibt einem/einer Lehrer(in) Administratorrechte."""
+
+    lehrer = Lehrer.query.filter_by(kuerzel=kuerzel).first()
+
+    if lehrer is None:
+        click.echo("Fehler: Das angegebene Kürzel ist nicht registriert.", err=True)
+        return 1
+
+    if lehrer.is_admin:
+        click.echo(kuerzel + " ist bereits Administrator.")
+        return 0
+
+    lehrer.is_admin = True
+    db.session.commit()
+    click.echo(kuerzel + " ist jetzt Administrator.")
+    return 0
+
+
+@click.command("take-admin")
+@click.argument("kuerzel")
+@with_appcontext
+def take_admin_command(kuerzel):
+    """Nimmt einem/einer Lehrer(in) seine/ihre Administratorrechte."""
+
+    lehrer = Lehrer.query.filter_by(kuerzel=kuerzel).first()
+
+    if lehrer is None:
+        click.echo("Fehler: Das angegebene Kürzel ist nicht registriert.", err=True)
+        return 1
+
+    if not lehrer.is_admin:
+        click.echo(kuerzel + " ist bereits kein Administrator.")
+        return 0
+
+    lehrer.is_admin = False
+    db.session.commit()
+    click.echo(kuerzel + " ist jetzt kein Administrator mehr.")
+    return 0
+
+
+@click.command("cleanup")
+@with_appcontext
+def cleanup_command():
+    """Entfernt abgelaufene Daten aus der NateMan-Datenbank."""
+    Session.cleanup()
+    Lehrer.password_reset_cleanup()
+    db.session.commit()
+    return 0
+
+
+@click.command("send-reminder-mails")
+@with_appcontext
+def send_reminder_mails_command():
+    """Sendet Erinnerungsemails an alle Lehrer(innen), die unbearbeitete vergangene Klausuren haben."""
+    emails.send_reminder_mails()
+    return 0
+
+
+@click.command("apply-email-format")
+@click.option("-f", "--format", "fmt", type=click.STRING, default=None)
+@click.option("-o", "--override", is_flag=True)
+@with_appcontext
+def apply_email_format_command(fmt, override):
+    """Wendet das E-Mail-Adressen-Format auf Lehrer an."""
+    fmt = fmt or config.get("email-address-format", None)
+    if fmt is None:
+        click.echo("Fehler: Ein Format ist weder konfiguriert, noch wurde eines angegeben.", err=True)
+        return 1
+
+    query = Lehrer.query if override else Lehrer.query.filter_by(email=None)
+    lehrer = query.all()
+    for l in lehrer:
+        l.set_default_email_address(fmt)
+
+    db.session.commit()
+
+    return 0
+
+
+def init_commands():
+    cli.add_command(add_lehrer_command)
+    cli.add_command(make_admin_command)
+    cli.add_command(take_admin_command)
+    cli.add_command(add_stufe_command)
+    cli.add_command(remove_stufe_command)
+    cli.add_command(add_koopschule_command)
+    cli.add_command(remove_koopschule_command)
+    cli.add_command(send_reminder_mails_command)
+    cli.add_command(apply_email_format_command)
+    cli.add_command(cleanup_command)
+
+
+init_commands()

nateman/config_manager.py

@@ -0,0 +1,56 @@
+# NateMan – Nachschreibtermin-Manager
+# config_manager.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält Funktionen zum Laden/Erstellen der Konfigurationsdatei.
+"""
+
+import os
+from shutil import copyfile
+
+import yaml
+
+config: dict = {}
+
+
+def read_config_file(app):
+    """Liest die Konfigurationsdatei."""
+    with open(os.path.join(app.instance_path, "config.yml"), "r", encoding="utf-8") as yaml_file:
+        yamlobj = yaml.safe_load(yaml_file)
+        if not isinstance(yamlobj, dict):
+            raise RuntimeError(f"Invalid config file: yaml.load returned an object "
+                               f"of type {type(yamlobj).__name__} instead of a dict")
+
+    config.clear()
+    config.update(yamlobj)
+
+
+def create_config_file(app) -> str:
+    """Initialisiert die Konfigurationsdatei und gibt den Pfad der neuen Datei zurück."""
+    new_file_path = os.path.join(app.instance_path, "config.yml")
+    copyfile(
+        os.path.join(app.root_path, "resources", "default-config.yml"),
+        new_file_path
+    )
+    return new_file_path
+
+
+def config_file_exists(app) -> bool:
+    """Überprüft, ob die Konfigurationsdatei existiert."""
+    return os.path.isfile(
+        os.path.join(app.instance_path, "config.yml")
+    )

nateman/emails.py

@@ -0,0 +1,152 @@
+# NateMan – Nachschreibtermin-Manager
+# emails.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält Funktionen für den E-Mail-Versand.
+"""
+
+import smtplib
+from datetime import datetime
+from email.mime.text import MIMEText
+from typing import Optional, Union
+
+from flask import current_app, render_template
+from sqlalchemy.sql.elements import and_
+
+from .config_manager import config
+from .models import Klausur, Lehrer
+
+
+def _smtp_create() -> Union[smtplib.SMTP, smtplib.SMTP_SSL]:
+    """Erstellt die der Konfiguration entsprechende SMTP-Instanz und verbindet zum SMTP-Server."""
+    logger = current_app.logger
+    logger.debug("Stellt Verbindung zum SMTP-Server her...")
+
+    smtp_constr = smtplib.SMTP_SSL if config["mail"]["use-ssl"] else smtplib.SMTP
+    smtp = smtp_constr(config["mail"]["smtp"]["hostname"], config["mail"]["smtp"]["hostport"])
+
+    smtp.login(config["mail"]["smtp"]["user"], config["mail"]["smtp"]["password"])
+
+    logger.debug("Erfolgreich mit SMTP-Server verbunden.")
+
+    return smtp
+
+
+def _send_mail(address: str, subject: str, content: str, content_type="html", content_charset="utf-8",
+               smtp: Optional[smtplib.SMTP] = None) -> None:
+    """
+    Sendet eine E-Mail mit den in der NateMan-Konfiguration angegebenen SMTP-Daten.
+
+    :param address: Adresse, zu der die E-Mail gesendet werden soll
+    :param subject: Betreff der E-Mail
+    :param content: Inhalt der E-Mail
+    :param content_type: Inhaltstyp der E-Mail
+    :param content_charset: Zeichensatz des E-Mail-Inhalts
+    :param smtp: SMTP-Verbindung. Falls keine Verbindung angegeben wird, wird eine erstellt
+    (und nach dem E-Mail-Versand geschlossen).
+    """
+    logger = current_app.logger
+    sender_address = config["mail"]["sender-address"]
+
+    msg = MIMEText(content, content_type, content_charset)
+    msg["From"] = f"NateMan <{sender_address}>"
+    msg["Subject"] = subject
+
+    smtp_param = smtp is not None
+    if not smtp_param:
+        smtp = _smtp_create()
+
+    logger.debug(f"E-Mail wird an {address} versandt...")
+    try:
+        smtp.sendmail(sender_address, address, msg.as_string())
+    except smtplib.SMTPRecipientsRefused as exc:
+        if not smtp_param:
+            smtp.close()
+        logger.debug(f"E-Mail an {address} konnte nicht versandt werden "
+                     f"(wahrscheinlich ungültige Adresse).", exc_info=exc)
+        raise
+    else:
+        logger.debug(f"E-Mail an {address} erfolgreich versandt.")
+
+    if not smtp_param:
+        smtp.close()
+
+
+def send_confirmation_link_mail(address: str, token: str) -> None:
+    """Sendet die Bestätigungsemail nach dem Festlegen der E-Mail-Adresse."""
+    content = render_template("email/confirmation.html.j2", token=token)
+    _send_mail(address, "NateMan: Bestätigung der E-Mail-Adresse", content)
+
+
+def send_password_reset_mail(address: str, token: str) -> None:
+    """Sendet die Passwortzurücksetzungsemail."""
+    content = render_template("email/password-reset.html.j2", token=token)
+    _send_mail(address, "NateMan: Passwortzurücksetzung", content)
+
+
+def send_reminder_mails() -> int:
+    """
+    Sendet Erinnerungsemails an alle Lehrer, die unbearbeitete vergangene Klausuren haben.
+
+    :return: Anzahl der E-Mails, die nicht versandt werden konnten
+    """
+    logger = current_app.logger
+    logger.info("Startet den Versand von Erinnerungsemails...")
+
+    # SMTP-Connect
+    smtp = _smtp_create()
+
+    fail_count = 0
+    for lehrer in Lehrer.query.all():
+        not_edited_list = Klausur.query \
+            .filter(and_(Klausur.date <= datetime.now().date(), Klausur.lehrer == lehrer, ~Klausur.edited)) \
+            .order_by(Klausur.date.desc()).all()
+
+        if len(not_edited_list) == 0:
+            fail_count += 1
+            continue
+
+        if lehrer.email is None:
+            fail_count += 1
+            logger.info(f"Erinnerungsemail an {lehrer} konnte nicht versandt werden, da für diesen Lehrer keine "
+                        f"E-Mail-Adresse eingetragen ist.")
+            continue
+
+        if not lehrer.is_confirmed:
+            fail_count += 1
+            logger.info(f"Erinnerungsemail an {lehrer} konnte nicht versandt werden, da die E-Mail-Adresse dieses "
+                        f"Lehrers ({lehrer.email}) nicht bestätigt ist.")
+            continue
+
+        content = render_template("email/reminder.html.j2", not_edited_list=not_edited_list)
+        try:
+            _send_mail(lehrer.email, "NateMan: zur Erinnerung", content, smtp=smtp)
+        except smtplib.SMTPRecipientsRefused as exc:
+            logger.info(f"Erinnerungsemail an {lehrer} mit der Adresse {lehrer.email} konnte nicht versandt werden "
+                        f"(wahrscheinlich ungültige Adresse).", exc_info=exc)
+        else:
+            logger.info(f"Erinnerungsemail an {lehrer} erfolgreich versandt.")
+
+    smtp.close()
+
+    if fail_count == 0:
+        logger.info("Versand von Erinnerungsemails abgeschlossen.")
+    else:
+        logger.info(f"Versand von Erinnerungsemails abgeschlossen. "
+                    f"{fail_count} E-Mail(s) konnten nicht versandt werden.")
+
+    return fail_count

nateman/exporter.py

@@ -0,0 +1,105 @@
+# NateMan – Nachschreibtermin-Manager
+# exporter.py
+# Copyright © 2020  Johannes Bingel
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+from typing import Iterable, Optional
+
+from openpyxl import Workbook
+from openpyxl.styles import Font
+
+from nateman import assigner
+from .models import Klausur, Klausurteilnahme, Schueler, Stufe
+
+
+def excelexport(filepath: str, stufen: Optional[Iterable[Stufe]] = None):
+    # Intiziert die Exceldatei
+    workbook = Workbook()
+
+    # Holt sich alle Stufen falls keinen Angegeben sind
+    if stufen is None:
+        stufen = Stufe.query.all()
+
+    # exstellt für jede Stufe ein Excelsheet
+    for s in stufen:
+
+        # Holt sich alle vNachschreiben in eine List aus der Datenbank
+        k_schueler = Klausurteilnahme.query.join(Klausur).join(Schueler).filter(Klausurteilnahme.versaeumt) \
+            .filter(~Klausurteilnahme.nachgeschrieben).filter(Klausur.stufe == s) \
+            .order_by(Schueler.nachname, Schueler.vorname).all()
+
+        # Holt sich die Zuordnugsvoschläge
+        suggestions = assigner.zuordnen(k_schueler)
+
+        # Initialisiert das Excelsheet
+        workbook.create_sheet(s.name)
+        worksheet = workbook[s.name]
+
+        # Fügt die Schüle in die Exceltabelle ein.
+
+        if len(k_schueler) != 0:
+
+            worksheet.cell(1, 1, "Nr")
+            worksheet.cell(1, 2, "Name")
+            worksheet.cell(1, 3, "Vorname")
+            worksheet.cell(1, 4, "Kurs")
+            worksheet.cell(1, 5, "Lehrer")
+            worksheet.cell(1, 6, "Dauer [min]")
+            worksheet.cell(1, 7, "Attest")
+            if suggestions is None:
+                worksheet.cell(1, 8, "Bemerkung")
+            else:
+                worksheet.cell(1, 8, "Termin(Vorschlag)")
+                worksheet.cell(1, 9, "Bemerkung")
+
+            i = 0
+
+            while i < len(k_schueler):
+                worksheet.cell(i + 2, 1, i + 1)
+                worksheet.cell(i + 2, 2, k_schueler[i].schueler.nachname)
+                worksheet.cell(i + 2, 3, k_schueler[i].schueler.vorname)
+                worksheet.cell(i + 2, 4, k_schueler[i].klausur.kursname)
+                worksheet.cell(i + 2, 5, str(k_schueler[i].klausur.lehrer.kuerzel))
+                worksheet.cell(i + 2, 6, k_schueler[i].klausur.laenge)
+                if k_schueler[i].attestiert:
+                    worksheet.cell(i + 2, 7, "Ja")
+                else:
+                    worksheet.cell(i + 2, 7, "Nein")
+
+                nichtgefunden = True
+                if suggestions is not None:
+                    for i2 in range(0, len(suggestions)):
+                        if k_schueler[i] in suggestions[i2]:
+                            worksheet.cell(i + 2, 8, i2 + 1)
+                            nichtgefunden = False
+                    if nichtgefunden:
+                        worksheet.cell(i + 2, 8, "problem")
+                        nichtgefunden = True
+                    worksheet.cell(i + 2, 9, k_schueler[i].klausur.annotation)
+                else:
+                    worksheet.cell(i + 2, 8, k_schueler[i].klausur.annotation)
+                i += 1
+
+            del i
+            del nichtgefunden
+
+        else:
+            bold = Font(bold=True)
+            worksheet.cell(1, 1, "Keine Schüler fehlen")
+            worksheet.cell(1, 1, ).font = bold
+
+    workbook.remove(workbook["Sheet"])
+    workbook.close()
+    workbook.save(filepath)

nateman/importer.py

@@ -0,0 +1,218 @@
+# NateMan – Nachschreibtermin-Manager
+# importer.py
+# Copyright © 2020  Niklas Elsbrock und Johannes Bingel
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält Funktionen zum Import von Daten.
+"""
+
+from datetime import datetime
+from typing import TextIO, SupportsInt, Union
+
+import bcrypt
+from openpyxl import load_workbook
+from sqlalchemy.sql import and_, exists
+from xml.dom import minidom
+
+from . import util
+from .config_manager import config
+from .models import Klausur, Klausurteilnahme, Lehrer, Schueler, Stufe, db, get_next_new_schueler_id, Koopschule
+
+
+class KlausurplanImportError(Exception):
+    """Beim Versuch, einen Klausurplan zu importieren aufgrund einer ungültigen Klausurdatei aufgetretener Fehler"""
+    pass
+
+
+class KoopSchuelerImportError(Exception):
+    """Beim Versuch, Koop-Schueler zu importieren aufgrund einer ungültigen Klausurdatei aufgetretener Fehler"""
+    pass
+
+
+def _nbit_int(x: Union[str, bytes, SupportsInt], base=10, maxbits=32):
+    result = int(x, base)
+    if result.bit_length() > maxbits:
+        raise ValueError(f"integer exceeds {maxbits}-bit limit")
+
+    return result
+
+
+def import_plan(xml_file: TextIO, stufe: Stufe, new_lehrer_pwd: str) -> None:
+    """
+    Importiert eine Klausurliste aus dem gegebenen XML-Klausurexport für die angegebene Stufe.
+    Registriert noch nicht registrierte Lehrer mit dem angegebenen Passwort.
+    von Niklas Elsbrock
+
+    :param xml_file: zu importierende XML-Datei
+    :param stufe: Stufe, für die die
+    :param new_lehrer_pwd: Passwort für neu registrierte Lehrerkonten
+    """
+    assert util.validate_bcrypt_password(new_lehrer_pwd)
+
+    # Importdatum setzen
+    stufe.import_date = datetime.now().date()
+
+    new_lehrer_pwd_hash = bcrypt.hashpw(new_lehrer_pwd.encode("utf-8"), bcrypt.gensalt())
+
+    xmldoc = minidom.parse(xml_file)
+
+    # Klausurschienen durchgehen
+    for termin in xmldoc.getElementsByTagName("KLAUSURSCHIENE"):
+
+        date = datetime.strptime(termin.attributes["Datum"].value, "%d.%m.%Y").date()
+        startperiod = _nbit_int(termin.attributes["VonStd"].value)
+        endperiod = _nbit_int(termin.attributes["BisStd"].value)
+
+        if startperiod < 0 or startperiod > endperiod:
+            raise KlausurplanImportError(f"Zu importierender Plan für die Stufe {stufe.name} enthält ungültigen "
+                                         f"Zeitraum (Termin: {util.format_date(date)}; VonStd: {startperiod} BisStd: "
+                                         f"{endperiod})")
+
+        if db.session.query(exists().where(and_(Klausur.date == date, Klausur.stufe == stufe))).scalar():
+            raise KlausurplanImportError(f"Zu importierender Plan für die {stufe.name} enthält zwei Klausurtermine "
+                                         f"(Klausurschienen) für dasselbe Datum.")
+
+        # Kurse dieser Schiene durchgehen
+        for kurs in termin.getElementsByTagName("KURS"):
+            kursname = kurs.attributes["Bez"].value
+            kurs_lehrerkuerzel = kurs.attributes["Lehrer"].value
+
+            # eventuell bereits registrierten Lehrer bekommen
+            kurs_lehrer_entity = Lehrer.query.filter_by(kuerzel=kurs_lehrerkuerzel).first()
+
+            # Falls der Lehrer noch nicht registriert ist, registrieren
+            if kurs_lehrer_entity is None:
+                kurs_lehrer_entity = Lehrer(kuerzel=kurs_lehrerkuerzel, is_confirmed=True, pwd_hash=new_lehrer_pwd_hash)
+                # Falls ein E-Mailadressenformat konfiguriert ist, dieses nutzen.
+                email_address_format = config.get("email-address-format", None)
+                if email_address_format is not None:
+                    kurs_lehrer_entity.set_default_email_address(email_address_format)
+
+                db.session.add(kurs_lehrer_entity)
+
+            klausur_entity = Klausur(kursname=kursname, date=date, startperiod=startperiod, endperiod=endperiod,
+                                     stufe=stufe, lehrer=kurs_lehrer_entity)
+            db.session.add(klausur_entity)
+
+            # Schüler dieses Kurses durchgehen
+            for schueler in kurs.getElementsByTagName("SCHUELER"):
+                schueler_dbid = _nbit_int(schueler.attributes["DbIdnr"].value)
+
+                schueler_nachname = schueler.attributes["Name"].value.strip()
+                schueler_vorname = schueler.attributes["Vorname"].value.strip()
+
+                # eventuell bereits eingetragenen Schüler bekommen
+                schueler_entity = Schueler.query.filter_by(id=schueler_dbid).first()
+
+                # Falls der Schüler noch nicht eingetragen ist, eintragen
+                if schueler_entity is None:
+                    schueler_entity = Schueler(id=schueler_dbid, nachname=schueler_nachname,
+                                               vorname=schueler_vorname, stufe=stufe)
+                    db.session.add(schueler_entity)
+
+                else:
+                    # Ist dieser Schüler bereits für eine andere Stufe eingetragen? -> Fehler
+                    if schueler_entity.stufe != stufe:
+                        raise KlausurplanImportError(f"Zu importierender Plan für die {stufe.name} enthält Schüler(in) "
+                                                     f"({schueler_vorname} {schueler_nachname}, "
+                                                     f"DbIdNr: {schueler_dbid}), der/die bereits für die "
+                                                     f"{schueler_entity.stufe.name} eingetragen ist.")
+
+                    # Ist derselbe Schüler bereits in dieser Klausur? -> Fehler
+                    if db.session.query(exists().where(and_(Klausurteilnahme.schueler == schueler_entity,
+                                                            Klausurteilnahme.klausur == klausur_entity))).scalar():
+                        raise KlausurplanImportError(f"Zu importierender Plan für die {stufe.name} enthält selbe(n) "
+                                                     f"Schüler(in) ({schueler_vorname} {schueler_nachname}, "
+                                                     f"DbIdNr: {schueler_dbid}) mehrfach in "
+                                                     f"derselben Klausur ({kursname}).")
+
+                # Falls der Schüler die Klausur mitschreibt, zur Klausur hinzufügen
+                if schueler.attributes["Klausurschreiber"].value == "j":
+                    klausurteilnahme = Klausurteilnahme(klausur=klausur_entity, schueler=schueler_entity)
+                    db.session.add(klausurteilnahme)
+
+
+# Von Johannes
+def excelimport(filepath: str):
+    # Initialisiert Startdaten
+    if Stufe.import_date is not None:
+        workbook = load_workbook(filepath)
+        worksheet = workbook["Datenblatt"]
+        schueler = []
+        exceptions = []
+
+        # Holt die Daten der Schüler aus der Exceltabelle
+        i = 10
+
+        while worksheet.cell(row=i, column=3).value is not None and worksheet.cell(row=i + 1,
+                                                                                   column=3).value is not None:
+            if worksheet.cell(row=i, column=3).value is not None:
+                schueler.append([worksheet.cell(row=i, column=6).value, worksheet.cell(row=i, column=3).value,
+                                 worksheet.cell(row=i, column=4).value])
+            i += 1
+
+        # Spalten die Daten in ihre Bestandteile
+        i = 0
+        i2 = 0
+        i3 = 0
+
+        while i < len(schueler):
+            while i2 < len(schueler[i][0]):
+                if schueler[i][0][i2] == ",":
+                    break
+                i2 += 1
+            while i3 < len(schueler[i][1]):
+                if schueler[i][1][i3] == " ":
+                    break
+                i3 += 1
+            schueler[i] = [schueler[i][0][:i2], schueler[i][0][i2 + 2:], schueler[i][1][:i3], schueler[i][1][i3 + 2:-1],
+                           schueler[i][2]]
+            i2 = 0
+            i3 = 0
+            i += 1
+
+        # s 0 Nachname, 1 Vorname, 2 Fach , 3 Lehrer, 4 KOOP_Schuhle
+        # Erstellt für jeden schüler einen Eintrag und prüft ob die Lks und Koopschulen existieren
+        for s in schueler:
+            if s[2] == "E":
+                s[2] = "E5"
+            klausuren = Klausur.query.join(Lehrer).filter(Lehrer.kuerzel == s[3]).all()
+            i = 0
+            while i < len(klausuren):
+                if klausuren[i].kursname[:-2] in ((str(s[2]) + suffix) for suffix in ("-L", " L")):
+                    i += 1
+                else:
+                    klausuren.pop(i)
+            if len(klausuren) > 0:
+                schueler_entity = Schueler(id=get_next_new_schueler_id(), nachname=s[0], vorname=s[1],
+                                           stufe=klausuren[0].stufe)
+                schule_entity = Koopschule.query.filter_by(kuerzel=s[4]).first()
+                if schule_entity is not None:
+                    schueler_entity.stammschule = schule_entity
+                    for klausur in klausuren:
+                        teilnahme_entity = Klausurteilnahme(klausur=klausur, schueler=schueler_entity)
+                        db.session.add(schueler_entity)
+                        db.session.add(teilnahme_entity)
+                else:
+                    raise KoopSchuelerImportError("Für den/die Schüler(in) " + s[0] + ", " + s[1]
+                                                  + "konnte keine Koopschule mit dem Kürzel " + s[4]
+                                                  + " gefunden werden.")
+            else:
+                exceptions.append(s)
+
+        return exceptions
+    else:
+        raise KoopSchuelerImportError("Für die Stufe ist noch kein Klausurplan importiert")

nateman/models.py

@@ -0,0 +1,275 @@
+# NateMan – Nachschreibtermin-Manager
+# models.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält die SQLAlchemy-Modelle.
+"""
+from datetime import datetime, timedelta
+from sqlite3 import Connection as Sqlite3_Connection
+from typing import Optional, Tuple, Union, AnyStr
+
+import bcrypt
+from flask_sqlalchemy import SQLAlchemy
+from sqlalchemy import CheckConstraint
+from sqlalchemy.engine import Engine
+from sqlalchemy.sql import func
+
+from . import util
+from .config_manager import config
+
+db: SQLAlchemy = SQLAlchemy()
+
+
+class Klausurteilnahme(db.Model):
+    klausur_id = db.Column(db.Integer, db.ForeignKey("klausur.id", onupdate="CASCADE", ondelete="CASCADE"),
+                           primary_key=True)
+    schueler_id = db.Column(db.Integer, db.ForeignKey("schueler.id", onupdate="CASCADE", ondelete="CASCADE"),
+                            primary_key=True)
+    versaeumt = db.Column(db.Boolean, default=False, nullable=False)
+    attestiert = db.Column(db.Boolean, default=False, nullable=False)
+    nachgeschrieben = db.Column(db.Boolean, default=False, nullable=False)
+
+    klausur = db.relationship("Klausur", lazy="joined")
+    schueler = db.relationship("Schueler", lazy="joined")
+
+
+class Stufe(db.Model):
+    name = db.Column(db.String(), primary_key=True)
+    import_date = db.Column(db.Date(), default=None)
+
+
+class Schueler(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    nachname = db.Column(db.String(collation="NOCASE"), nullable=False)
+    vorname = db.Column(db.String(collation="NOCASE"), nullable=False)
+    stufe_name = db.Column(db.String(), db.ForeignKey("stufe.name", onupdate="CASCADE", ondelete="CASCADE"),
+                           nullable=False)
+    stammschule_name = db.Column(db.String(),
+                                 db.ForeignKey("koopschule.kuerzel", onupdate="CASCADE", ondelete="CASCADE"))
+
+    stufe = db.relationship("Stufe", lazy="select")
+    stammschule = db.relationship("Koopschule", lazy="select")
+
+    def __str__(self):
+        return f"{self.nachname}, {self.vorname} ({self.stufe.name}, ID:{self.id})"
+
+
+class Lehrer(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    kuerzel = db.Column(db.String(collation="NOCASE"), unique=True, nullable=False)
+    email = db.Column(db.String())
+    is_confirmed = db.Column(db.Boolean, default=False, nullable=False)
+    pwd_hash = db.Column(db.String(), nullable=False)
+    is_admin = db.Column(db.Boolean, default=False, nullable=False)
+    beraet_name = db.Column(db.String(), db.ForeignKey("stufe.name", onupdate="CASCADE", ondelete="SET NULL"))
+    pwd_changed = db.Column(db.Boolean, default=False, nullable=False)
+    confirmation_token = db.Column(db.String(), unique=True)
+    password_reset_token = db.Column(db.String(), unique=True)
+    password_reset_expiry = db.Column(db.DateTime)
+
+    beraet = db.relationship("Stufe", lazy="select")
+
+    @staticmethod
+    def password_reset_cleanup() -> None:
+        """
+        Entfernt alle abgelaufenen Passwortzurücksetzungsanfragen aus der Datenbank.
+        """
+        Lehrer.query.filter(Lehrer.password_reset_expiry < datetime.utcnow()) \
+            .update({Lehrer.password_reset_token: None, Lehrer.password_reset_expiry: None})
+
+    def __str__(self):
+        return f"{self.kuerzel} (ID:{self.id})"
+
+    def can_access(self, stufe: Optional[Stufe] = None) -> bool:
+        """
+        Überprüft, ob dieser Lehrer erweiterten Zugriff auf die angegebene Stufe hat
+        (d.h. ob er Administrator oder Beratungslehrer der angegebenen Stufe ist).
+
+        Wenn die Stufe ``None`` ist, wird überprüft, ob dieser Lehrer
+        Administrator oder Beratungslehrer irgendeiner Stufe ist.
+
+        :return: ``True`` falls ja, ``False`` falls nicht
+        """
+        if self.is_admin:
+            return True
+        # ELSE
+        if stufe is None:
+            return self.beraet is not None
+        # ELSE
+        return self.beraet == stufe
+
+    def accessible_stufen(self, names: bool = False) -> Union[Tuple[Stufe, ...], Tuple[AnyStr, ...]]:
+        """
+        :param names: Falls ``True``, werden die Namen der Stufen anstelle der Stufenobjekte zurückgegeben
+        :return: Tupel mit allen Stufen, auf die dieser Lehrer erweiterten Zugriff hat
+        """
+        stufen = Stufe.query.all()
+        if self.is_admin:
+            return tuple(stufen) if not names else tuple(s.name for s in stufen)
+        # ELSE
+        if self.beraet:
+            return (self.beraet,) if not names else (self.beraet.name,)
+        # ELSE
+        return ()
+
+    def set_password(self, new_password: str, set_pwd_changed=True) -> None:
+        """
+        Legt das neue Passwort des Lehrers fest.
+
+        :param new_password: neues Passwort
+        :param set_pwd_changed: legt fest, ob der ``pwd_changed``-Eintrag in der Datenbank angepasst werden soll
+        """
+        assert util.validate_bcrypt_password(new_password)
+        self.pwd_hash = bcrypt.hashpw(new_password.encode("utf-8"), bcrypt.gensalt())
+        if set_pwd_changed:
+            self.pwd_changed = True
+
+    def check_password(self, password) -> bool:
+        """
+        Vergleicht ``password`` mit dem Passwort des Lehrers.
+
+        :param password: zu überprüfendes Passwort
+        :return: ``True`` falls die Passwörter übereinstimmen, ``False`` falls nicht
+        """
+        return bcrypt.checkpw(password.encode("utf-8"), self.pwd_hash)
+
+    def set_default_email_address(self, fmt) -> bool:
+        email_address = fmt.replace("?", util.email_address_safe(self.kuerzel))
+        if util.EMAIL_ADDRESS_REGEX.match(email_address):
+            self.email = email_address
+            self.is_confirmed = True
+            return True
+
+        return False
+
+
+class Klausur(db.Model):
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    kursname = db.Column(db.String(collation="NOCASE"), nullable=False)
+    date = db.Column(db.Date, nullable=False)
+    startperiod = db.Column(db.Integer, nullable=False)
+    endperiod = db.Column(db.Integer, nullable=False)
+    laenge = db.Column(db.Integer, default=None)
+    edited = db.Column(db.Boolean, default=False, nullable=False)
+    annotation = db.Column(db.String())
+    stufe_name = db.Column(db.String(), db.ForeignKey("stufe.name", onupdate="CASCADE", ondelete="CASCADE"),
+                           nullable=False)
+    lehrer_id = db.Column(db.Integer, db.ForeignKey("lehrer.id", onupdate="CASCADE", ondelete="CASCADE"),
+                          nullable=False)
+
+    stufe = db.relationship("Stufe", lazy="select")
+    lehrer = db.relationship("Lehrer", lazy="joined")
+
+    __table_args__ = (
+        CheckConstraint("startperiod >= 0"),
+        CheckConstraint("startperiod <= endperiod")
+    )
+
+    def __str__(self):
+        return f"{self.kursname}, {self.stufe.name} (ID:{self.id})"
+
+    def date_formatted(self) -> str:
+        """
+        :return: Klausurdatum als String im Format WW, DD.MM.YYYY (siehe util.format_date)
+        """
+        return util.format_date(self.date)
+
+    def is_bygone(self):
+        """
+        :return: ``True``, falls diese Klausur vergangen ist, ``False``, falls nicht
+        """
+        return self.date <= datetime.now().date()
+
+
+class Koopschule(db.Model):
+    kuerzel = db.Column(db.String(), primary_key=True)
+    name = db.Column(db.String())
+
+
+class Session(db.Model):
+    key = db.Column(db.String(), primary_key=True)
+    expiry = db.Column(db.DateTime, nullable=False)
+    lehrer_id = db.Column(db.Integer, db.ForeignKey("lehrer.id", onupdate="CASCADE", ondelete="CASCADE"),
+                          nullable=False)
+
+    lehrer = db.relationship("Lehrer", lazy="joined")
+
+    @staticmethod
+    def get(key: str) -> Optional["Session"]:
+        """
+        Gibt die Sitzung zurück, die zum Key gehört oder ``None``,
+        falls keine Sitzung mit dem Key existiert oder die Sitzung abgelaufen ist.
+
+        :param key: Sitzungs-Key
+        :return: Sitzung
+        """
+        session = Session.query.filter_by(key=key).first()
+        if session is not None and session.expired():
+            return None
+
+        return session
+
+    @staticmethod
+    def create(lehrer: Lehrer, expiry_delta: timedelta) -> "Session":
+        """
+        Erstellt eine neue Sitzung für den Lehrer ``lehrer``.
+
+        :param lehrer: Lehrer, für den eine Sitzung erstellt werden soll
+        :param expiry_delta: Zeitraum, nach dem die Sitzung ablaufen soll
+        :return: neue Sitzung
+        """
+        new_session = Session(key=util.random_uri_safe_string(64), expiry=datetime.utcnow() + expiry_delta,
+                              lehrer=lehrer)
+        db.session.add(new_session)
+        return new_session
+
+    @staticmethod
+    def cleanup() -> None:
+        """
+        Entfernt alle abgelaufenen Sitzungen aus der Datenbank.
+        """
+        Session.query.filter(Session.expiry < datetime.utcnow()).delete()
+
+    def expired(self) -> bool:
+        """
+        Überprüft, ob die Sitzung abgelaufen ist.
+        """
+        return self.expiry < datetime.utcnow()
+
+
+@db.event.listens_for(Engine, "connect")
+def set_sqlite_pragma(dbapi_connection, connection_record):
+    """
+    Falls SQLite verwendet wird, wird bei jedem Verbindungsaufbau zur Datenbank ``foreign_keys`` aktiviert, damit
+    Fremdschlüssel richtig funktionieren.
+    Von https://stackoverflow.com/questions/4477269.
+    """
+    if type(dbapi_connection) is Sqlite3_Connection:
+        cursor = dbapi_connection.cursor()
+        cursor.execute("PRAGMA foreign_keys=ON")
+        cursor.close()
+
+
+def get_next_new_schueler_id():
+    """
+    :return: ID, die der nächste manuell hinzugefügte Schüler haben soll
+    """
+    lowest_id = db.session.query(func.min(Schueler.id).label("min_id")).one().min_id
+    if lowest_id is None or lowest_id > -1:
+        return -1
+    # ELSE
+    return lowest_id - 1

nateman/resources/default-config.yml

@@ -0,0 +1,67 @@
+# Konfiguration der NateMan-Webanwendung.
+
+
+# Name, unter dem der Webserver normalerweise erreicht wird
+server-name: "nateman.example.com"
+
+# Benutzt der Webserver SSL (HTTPS)?
+uses-ssl: No
+
+# Passwort, das standardmäßig als Passwort für neu reistrierte Lehrer verwendet wird
+default-new-lehrer-password: ""
+
+# Format für E-Mail-Adressen neu hinzugefügter Lehrer.
+# Fragezeichen werden durch das jeweilige Kürzel des neuen Lehrers ersetzt.
+# Auskommentieren zum Deaktivieren.
+# Beispiel: email-address-format: "?@example.com"
+#email-address-format: ""
+
+
+schule:
+  # Name der Schule
+  name: "Max-Mustermann-Schule"
+  # URL zur Website der Schule
+  website-url: "https://example.com/"
+  # Optional: URL zum Schullogo.
+  # Optimal ist ein PNG-Bild mit maximal 100 Pixeln Höhe.
+  #logo-url
+  # Url zum Impressum
+  imprint-url: "https://example.com/impressum"
+  # Url zur Datenschutzerklärung
+  privacy-policy-url: "https://example.com/datenschutz"
+
+
+klausuren:
+  # Maximale Zeichenanzahl für Bemerkungen
+  max-annotation-length: 64
+  # Bei der Klausurbearbeitung auswählbare Klausurlängen.
+  # Bestehende Daten werden von einer Änderung nicht beeinflusst.
+  klausurlaengen:
+    - 45
+    - 60
+    - 135
+    - 180
+
+
+# Logging-Einstellungen
+logging:
+  # Logging-Level. Mögliche Werte: NOTSET, DEBUG, INFO, WARNING, ERROR, CRITICAL
+  level: "INFO"
+  # Legt fest, ob Lognachrichten zu syslog (/dev/log) gesendet werden sollen
+  syslog: No
+
+
+# Mailserver-Einstellungen
+mail:
+  # Addresse, von der von NateMan automatisch gesendete E-Mails ausgehen
+  sender-address: "nateman@example.com"
+  # Legt, ob SSL zur Verbindung zum SMTP-Server verwendet werden soll.
+  # Empfohlen, falls der SMTP-Server dies unterstützt.
+  use-ssl: Yes
+
+  # SMTP-Host- und Anmeldedaten
+  smtp:
+    hostname: "smtp.example.com"
+    hostport: 25
+    user: "nateman@example.com"
+    password: ""

nateman/static/font/fontawesome/LICENSE.txt

@@ -0,0 +1,34 @@
+Font Awesome Free License
+-------------------------
+
+Font Awesome Free is free, open source, and GPL friendly. You can use it for
+commercial projects, open source projects, or really almost whatever you want.
+Full Font Awesome Free license: https://fontawesome.com/license/free.
+
+# Icons: CC BY 4.0 License (https://creativecommons.org/licenses/by/4.0/)
+In the Font Awesome Free download, the CC BY 4.0 license applies to all icons
+packaged as SVG and JS file types.
+
+# Fonts: SIL OFL 1.1 License (https://scripts.sil.org/OFL)
+In the Font Awesome Free download, the SIL OFL license applies to all icons
+packaged as web and desktop font files.
+
+# Code: MIT License (https://opensource.org/licenses/MIT)
+In the Font Awesome Free download, the MIT license applies to all non-font and
+non-icon files.
+
+# Attribution
+Attribution is required by MIT, SIL OFL, and CC BY licenses. Downloaded Font
+Awesome Free files already contain embedded comments with sufficient
+attribution, so you shouldn't need to do anything additional when using these
+files normally.
+
+We've kept attribution comments terse, so we ask that you do not actively work
+to remove them from files, especially code. They're a great way for folks to
+learn about Font Awesome.
+
+# Brand Icons
+All brand icons are trademarks of their respective owners. The use of these
+trademarks does not indicate endorsement of the trademark holder by Font
+Awesome, nor vice versa. **Please do not use brand logos for any purpose except
+to represent the company, product, or service to which they refer.**

nateman/static/font/lato/OFL.txt

@@ -0,0 +1,94 @@
+Copyright (c) 2010-2015, Łukasz Dziedzic (dziedzic@typoland.com),
+with Reserved Font Name Lato.
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

nateman/static/img/nateman-erm.svg

@@ -0,0 +1,714 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.2" width="297mm" height="175mm" viewBox="0 0 29700 17500" preserveAspectRatio="xMidYMid" fill-rule="evenodd" stroke-width="28.222" stroke-linejoin="round" xmlns="http://www.w3.org/2000/svg" xmlns:ooo="http://xml.openoffice.org/svg/export" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:presentation="http://sun.com/xmlns/staroffice/presentation" xmlns:smil="http://www.w3.org/2001/SMIL20/" xmlns:anim="urn:oasis:names:tc:opendocument:xmlns:animation:1.0" xml:space="preserve">
+ <defs class="ClipPathGroup">
+  <clipPath id="presentation_clip_path" clipPathUnits="userSpaceOnUse">
+   <rect x="0" y="0" width="29700" height="17500"/>
+  </clipPath>
+  <clipPath id="presentation_clip_path_shrink" clipPathUnits="userSpaceOnUse">
+   <rect x="29" y="17" width="29641" height="17465"/>
+  </clipPath>
+ </defs>
+ <defs>
+  <font id="EmbeddedFont_1" horiz-adv-x="2048">
+   <font-face font-family="Liberation Sans embedded" units-per-em="2048" font-weight="normal" font-style="normal" ascent="1852" descent="423"/>
+   <missing-glyph horiz-adv-x="2048" d="M 0,0 L 2047,0 2047,2047 0,2047 0,0 Z"/>
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+        <text class="TextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="423px" font-weight="400"><tspan class="TextPosition" x="26390" y="12792"><tspan fill="rgb(0,0,0)" stroke="none">startperiod</tspan></tspan></tspan></text>
+       </g>
+      </g>
+      <g class="com.sun.star.drawing.CustomShape">
+       <g id="id89">
+        <rect class="BoundingBox" stroke="none" fill="none" x="25516" y="13320" width="3757" height="1133"/>
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+        <path fill="none" stroke="rgb(0,0,0)" d="M 29271,13886 C 29271,13985 29184,14083 29020,14169 28855,14254 28618,14326 28332,14375 28047,14425 27723,14451 27394,14451 27065,14451 26741,14425 26455,14375 26170,14326 25933,14254 25768,14169 25604,14083 25517,13985 25517,13886 25517,13787 25604,13689 25768,13604 25933,13518 26170,13446 26455,13397 26741,13347 27065,13321 27394,13321 27723,13321 28047,13347 28332,13397 28618,13446 28855,13518 29020,13604 29184,13689 29271,13787 29271,13886 Z"/>
+        <text class="TextShape"><tspan class="TextParagraph" font-family="Liberation Sans, sans-serif" font-size="423px" font-weight="400"><tspan class="TextPosition" x="26448" y="14034"><tspan fill="rgb(0,0,0)" stroke="none">endperiod</tspan></tspan></tspan></text>
+       </g>
+      </g>
+      <g class="com.sun.star.drawing.ConnectorShape">
+       <g id="id90">
+        <rect class="BoundingBox" stroke="none" fill="none" x="23909" y="10160" width="1611" height="2487"/>
+        <path fill="none" stroke="rgb(0,0,0)" d="M 23910,10161 L 25518,12645"/>
+       </g>
+      </g>
+      <g class="com.sun.star.drawing.ConnectorShape">
+       <g id="id91">
+        <rect class="BoundingBox" stroke="none" fill="none" x="23909" y="10160" width="1611" height="3729"/>
+        <path fill="none" stroke="rgb(0,0,0)" d="M 23910,10161 L 25518,13887"/>
+       </g>
+      </g>
+     </g>
+    </g>
+   </g>
+  </g>
+ </g>
+</svg>

nateman/static/script.js

@@ -0,0 +1,33 @@
+// JavaScript des NateMan von Niklas Elsbrock
+
+// --- Flashnachrichten EventListener ---
+var flashNode;
+for (flashNode of document.getElementsByClassName('flash')) {
+  flashNode.onclick = function () {
+    this.style.display = 'none';
+  };
+
+  flashNode.onkeydown = function (event) {
+    if (event.keyCode === 13) {
+      this.style.display = 'none';
+    }
+  };
+}
+
+
+// --- Tabellenzeilen EventListener ---
+var trNode;
+var href;
+for (trNode of document.getElementsByTagName('tr')) {
+  if (trNode.getAttribute('data-href') !== null) {
+    trNode.onclick = function () {
+      window.location = this.getAttribute('data-href');
+    };
+
+    trNode.onkeydown = function (event) {
+      if (event.keyCode === 13) {
+        window.location = this.getAttribute('data-href');
+      }
+    };
+  }
+}

nateman/static/style.css

@@ -0,0 +1,507 @@
+/* Cascading Style Sheet des NateMan von Niklas Elsbrock */
+
+:root {
+  --bg-primary: #ffffff;
+  --bg-secondary: #eeeeee;
+  --bg-tertiary: #dddddd;
+  --fg-main: #000000;
+  --fg-warn: #ff8000;
+  --fg-detail: #777777;
+  --bg-marked: #ffff00;
+  --header-bg: #87aa25;
+  --header-fg: #ffffff;
+  --navbar-bg: #143d59;
+  --navbar-fg: #ffffff;
+  --navbar-link-hover-bg: rgba(255, 255, 255, 0.25);
+  --footer-fg: #777777;
+  --footer-fg-detail: #cccccc;
+  --footer-bg: #eeeeee;
+
+  --navbar-width: 220px;
+  --navbar-padding-top: 18px;
+  --header-height: 80px;
+  --header-border-width: 2px;
+  --header-full-height: calc(var(--header-height) + var(--header-border-width));
+
+  --labeled-hr-color: #ff8000;
+}
+
+
+@font-face {
+  font-family: 'Lato';
+  src: local('Lato Regular'),
+       url('./font/lato/LatoLatin-Regular.eot') format('embedded-opentype'),
+       url('./font/lato/LatoLatin-Regular.woff2') format('woff2'),
+       url('./font/lato/LatoLatin-Regular.woff') format('woff'),
+       url('./font/lato/LatoLatin-Regular.ttf') format('truetype');
+}
+
+@font-face {
+  font-family: 'Lato';
+  font-style: italic;
+  src: local('Lato Italic'),
+       url('./font/lato/LatoLatin-Italic.eot') format('embedded-opentype'),
+       url('./font/lato/LatoLatin-Italic.woff2') format('woff2'),
+       url('./font/lato/LatoLatin-Italic.woff') format('woff'),
+       url('./font/lato/LatoLatin-Italic.ttf') format('truetype');
+}
+
+@font-face {
+  font-family: 'Lato';
+  font-weight: bold;
+  src: local('Lato Bold'),
+       url('./font/lato/LatoLatin-Bold.eot') format('embedded-opentype'),
+       url('./font/lato/LatoLatin-Bold.woff2') format('woff2'),
+       url('./font/lato/LatoLatin-Bold.woff') format('woff'),
+       url('./font/lato/LatoLatin-Bold.ttf') format('truetype');
+}
+
+@font-face {
+  font-family: 'Font Awesome 5 Free';
+  font-weight: 900;
+  font-display: block;
+  src: url('./font/fontawesome/fa-solid-900.eot') format('embedded-opentype'),
+       url('./font/fontawesome/fa-solid-900.woff2') format('woff2'),
+       url('./font/fontawesome/fa-solid-900.woff') format('woff'),
+       url('./font/fontawesome/fa-solid-900.ttf') format('truetype'),
+       url('./font/fontawesome/fa-solid-900.svg#svg_fontregular') format('svg');
+}
+
+
+html,
+body {
+  width: 100%;
+  height: 100%;
+  position: fixed;
+}
+
+
+body {
+  margin: 0;
+  padding: 0;
+  font-family: 'Lato', sans-serif;
+  font-size: 16px;
+  line-height: 1.25;
+  background-color: var(--bg-primary);
+  color: var(--fg-main);
+}
+
+
+header {
+  display: table;
+  height: var(--header-height);
+  width: 100%;
+  position: fixed;
+  top: 0;
+  left: 0;
+  z-index: 1;
+  background-color: var(--header-bg);
+  border-bottom: 2px solid #607a18;
+  overflow-y: hidden;
+  white-space: nowrap;
+  user-select: none;
+}
+
+header .header-text {
+  display: table-cell;
+  height: 100%;
+  width: 100%;
+  color: var(--header-fg);
+  text-decoration: none;
+  font-size: 40px;
+  font-weight: bold;
+  text-align: center;
+  vertical-align: middle;
+}
+
+#nateman-logo-container {
+  display: block;
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: var(--navbar-width);
+  height: var(--header-height);
+  text-align: center;
+}
+
+#nateman-logo {
+  --img-margin: 10px;
+  height: calc(var(--header-height) - 2 * var(--img-margin));
+  margin: var(--img-margin);
+}
+
+
+nav {
+  width: var(--navbar-width);
+  height: calc(100% - var(--header-full-height) - var(--navbar-padding-top));
+  margin-top: var(--header-full-height);
+  position: fixed;
+  top: 0;
+  left: 0;
+  background-color: var(--navbar-bg);
+  overflow-x: hidden;
+  overflow-y: auto;
+  padding-top: var(--navbar-padding-top);
+  user-select: none;
+}
+
+nav a {
+  display: block;
+  padding: 8px 16px;
+  text-decoration: none;
+  font-size: 16px;
+  color: var(--navbar-fg);
+}
+
+nav a:hover {
+  background-color: var(--navbar-link-hover-bg);
+  text-decoration: none;
+}
+
+nav a > span {
+  display: table-cell;
+}
+
+nav a::before {
+  display: table-cell;
+  content: attr(data-icon);
+  width: 27px;
+  vertical-align: middle;
+}
+
+nav hr {
+  border: var(--navbar-link-hover-bg) solid 3px;
+  border-radius: 3px;
+  margin: 10px;
+}
+
+
+#page-section {
+  background-color: var(--bg-primary);
+  height: calc(100% - var(--header-full-height));
+  margin-left: var(--navbar-width);
+  margin-top: var(--header-full-height);
+  overflow-x: auto;
+  overflow-y: scroll;
+}
+
+#page {
+  display: flex;
+  flex-direction: column;
+  min-width: min-content;
+  min-height: 100%;
+}
+
+main {
+  flex: 1;
+  padding: 18px 25px 30px 25px;
+}
+
+main p {
+  text-align: justify;
+}
+
+
+footer {
+  display: table;
+  padding: 8px 10px;
+  color: var(--footer-fg);
+  font-size: 14px;
+  background-color: var(--footer-bg);
+  border-top: var(--footer-fg) solid 1px;
+}
+
+.footer-left,
+.footer-right {
+  display: table-cell;
+}
+
+.footer-left {
+  padding-right: 8px;
+  border-right: var(--footer-fg-detail) solid 1px;
+  vertical-align: middle;
+}
+
+#school-logo {
+  height: 35px;
+  vertical-align: middle;
+}
+
+.footer-right {
+  width: 100%;
+  padding-left: 8px;
+}
+
+
+#flash-container {
+  position: absolute;
+  width: 400px;
+  bottom: 0px;
+  right: 0px;
+  margin: 0px 27px 65px 0px;
+  display: flex;
+  flex-wrap: wrap-reverse;
+}
+
+.flash,
+.flash:hover {
+  text-decoration: none;
+  width: inherit;
+  margin-top: 10px;
+  padding: 10px;
+  border: 1px solid;
+  border-radius: 5px;
+  cursor: pointer;
+  transition: 0.2s;
+}
+
+.flash-success {
+  background-color: rgba(0, 255, 0, 0.5);
+  border-color: #008000 !important;
+}
+
+.flash-success:hover {
+  background-color: rgba(0, 255, 0, 0.7);
+}
+
+.flash-warning {
+  background-color: rgba(255, 255, 0, 0.5);
+  border-color: #808000 !important;
+}
+
+.flash-warning:hover {
+  background-color: rgba(255, 255, 0, 0.7);
+}
+
+.flash-error {
+  background-color: rgba(255, 0, 0, 0.5);
+  border-color: #800000 !important;
+}
+
+.flash-error:hover {
+  background-color: rgba(255, 0, 0, 0.6);
+}
+
+
+.table-aligned {
+  display: table;
+  box-sizing: border-box;
+  margin: -2px;
+}
+
+.table-aligned > div {
+  display: table-row;
+  box-sizing: content-box;
+}
+
+.table-aligned > div > div {
+  display: table-cell;
+  padding: 2px;
+}
+
+.table-aligned > div > div > input[type=text],
+.table-aligned > div > div > input[type=password],
+.table-aligned > div > div > input[type=email],
+.table-aligned > div > div > input[type=date],
+.table-aligned > div > div > select {
+  box-sizing: border-box;
+  width: 100%;
+}
+
+
+table {
+  border: 2px solid var(--fg-main);
+  border-collapse: collapse;
+}
+
+table tr.clickable {
+  cursor: pointer;
+}
+
+table tr.clickable:hover,
+table tr.clickable:focus {
+  background-color: var(--bg-tertiary);
+  outline: none;
+}
+
+table tbody tr:nth-child(odd) {
+  background-color: var(--bg-primary);
+}
+
+table tbody tr:nth-child(even) {
+  background-color: var(--bg-secondary);
+}
+
+table th,
+table td {
+  border-top: 1px solid var(--fg-main);
+  border-right: 1px dotted var(--fg-main);
+  border-bottom: 1px solid var(--fg-main);
+  border-left: 1px dotted var(--fg-main);
+  padding: 4px 6px;
+}
+
+table th {
+  background-color: var(--bg-tertiary);
+  border-bottom: 2px solid var(--fg-main);
+}
+
+
+[data-icon]::before {
+  font-family: 'Font Awesome 5 Free';
+  font-style: normal;
+  font-weight: normal;
+  content: attr(data-icon) '\00A0';
+}
+
+
+p {
+  margin: 0.5em 0;
+}
+
+h1, h2, h3, h4, h5, h6 {
+  margin: 1.2em 0 0.4em 0;
+}
+
+.page-heading {
+  margin: 0.8em 0 0.4em 0;
+}
+
+
+a {
+  color: inherit;
+  text-decoration: underline dotted;
+}
+
+a:hover {
+  text-decoration: underline solid;
+}
+
+
+a.scroll-anchor {
+  visibility: hidden;
+  color: #999999;
+  text-decoration: none;
+}
+
+a.scroll-anchor::before {
+  font-family: 'Font Awesome 5 Free';
+  font-weight: normal;
+  content: '\f0c1';
+}
+
+:hover > a.scroll-anchor {
+  visibility: inherit;
+}
+
+a.scroll-anchor:hover {
+  color: #555555;
+}
+
+
+.warn {
+  color: var(--fg-warn);
+}
+
+.warn::before {
+  content: '\f071\00A0';
+}
+
+.detail {
+  color: var(--fg-detail);
+}
+
+.description {
+  font-style: italic;
+}
+
+.negative-status {
+  color: #bb0000;
+  font-weight: bold;
+}
+
+.negative-status::before {
+  content: '\f00d\00A0';
+}
+
+.positive-status {
+  color: #00bb00;
+}
+
+.positive-status::before {
+  content: '\f00c\00A0';
+}
+
+.warn::before,
+.negative-status::before,
+.positive-status::before {
+  font-family: 'Font Awesome 5 Free';
+  font-weight: normal;
+}
+
+.marked {
+  border-radius: 3px;
+  background-color: var(--bg-marked);
+}
+
+.monospace {
+  font-family: 'Consolas', monospace;
+}
+
+
+hr,
+.labeled-hr::after {
+  border: var(--bg-secondary) solid 3px;
+  border-radius: 3px;
+  margin: 25px 0;
+}
+
+.labeled-hr {
+  display: flex;
+  margin: 20px 0;
+  color: var(--labeled-hr-color);
+  font-weight: bold;
+  white-space: nowrap;
+}
+
+.labeled-hr::after {
+  content: '';
+  width: 100%;
+  height: 0;
+  border-color: var(--labeled-hr-color);
+  margin: 7px 15px;
+}
+
+button.plain,
+input[type=submit].plain {
+  background: none;
+  border: none;
+  padding: 0;
+  font-family: inherit;
+  font-size: inherit;
+  font-weight: inherit;
+  line-height: inherit;
+  cursor: pointer;
+}
+
+button[disabled].plain,
+input[type=submit][disabled].plain {
+  cursor: default;
+}
+
+fieldset {
+  border: none;
+  margin: 0;
+  padding: 0;
+}
+
+input.small {
+  width: 40px;
+}
+
+
+@media only screen and (max-width: 1100px) {
+  .header-text .optional {
+    display: none;
+  }
+}

nateman/templates/admin/index.html.j2

@@ -0,0 +1,28 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/admin/index.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Administration{% endblock %}
+{% block header %}Administration{% endblock %}
+
+{% block content %}
+<p><a href="{{ url_for('admin.lehrer.index') }}" data-icon="&#xf0c0;">Lehrerkonten</a></p>
+<p><a href="{{ url_for('admin.sql_access') }}" data-icon="&#xf1c0;">SQL-Zugriff</a></p>
+{% endblock %}

nateman/templates/admin/lehrer/add.html.j2

@@ -0,0 +1,45 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/admin/lehrer/add.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Lehrer(in) hinzufügen{% endblock %}
+{% block header %}Lehrer(in) hinzufügen{% endblock %}
+
+{% block content %}
+<form method="post">
+  <div class="table-aligned">
+    <div>
+      <div><label for="kuerzel-input">Lehrerkürzel:</label></div>
+      <div><input type="text" name="kuerzel" id="kuerzel-input" autocomplete="off" required autofocus></div>
+    </div>
+    <div>
+      <div><label for="password-input">Passwort:</label></div>
+      <div><input type="password" name="password" id="password-input" autocomplete="off" required></div>
+    </div>
+  </div>
+
+  <label>
+    <input type="checkbox" name="force-password-change" id="force-password-change-cb">
+    bei Erstanmeldung Passwortänderung erzwingen
+  </label>
+
+  <p><input type="submit" value="Hinzufügen"></p>
+</form>
+{% endblock %}

nateman/templates/admin/lehrer/edit.html.j2

@@ -0,0 +1,90 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/admin/lehrer/edit.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Lehrer(in): {{ lehrer.kuerzel }}{% endblock %}
+{% block header %}Lehrer(in): {{ lehrer.kuerzel }}{% endblock %}
+
+{# lehrer #}
+{% set stufen_list = Stufe.query.all() %}
+
+{% block js_head %}
+  var delete_warn = "Durch das Löschen eines Lehrerkontos werden alle Klausuren,\ndie dem gelöschten Konto zugeordnet "
+                  + "sind, unwiderruflich gelöscht.\nWollen Sie wirklich fortfahren?"
+{% endblock %}
+
+{% block content %}
+<form method="post">
+  <input name="action" type="hidden" value="change-credentials">
+
+  <div class="table-aligned">
+    <div>
+      <div><label for="new-kuerzel-input">Lehrerkürzel:</label></div>
+      <div><input type="text" name="new-kuerzel" id="new-kuerzel-input" value="{{ lehrer.kuerzel }}" required></div>
+    </div>
+    <div>
+      <div><label for="new-email-input">E-Mail-Adresse:</label></div>
+      <div>
+        <input type="email" name="new-email" id="new-email-input"
+               value="{% if lehrer.email %}{{ lehrer.email }}{% endif %}" autocomplete="off">
+      </div>
+      {% if lehrer.email is not none %}
+        <div>
+          {% if lehrer.is_confirmed %}
+            <span class="positive-status" title="bestätigt"></span>
+          {% else %}
+            <span class="negative-status">nicht bestätigt</span>
+          {% endif %}
+        </div>
+      {% endif %}
+    </div>
+    <div>
+      <div><label for="new-password-input">Neues Passwort:</label></div>
+      <div><input type="password" name="new-password" id="new-password-input" autocomplete="new-password"></div>
+    </div>
+    <div>
+      <div><label for="new-beraet-select">Beratungslehrer(in) von:</label></div>
+      <div><select name="new-beraet" id="new-beraet-select">
+        <option value="">(keine Stufe)</option>
+        {% for stufe in stufen_list %}
+          <option {% if stufe.name == lehrer.beraet.name %}selected{% endif %}>{{ stufe.name }}</option>
+        {% endfor %}
+      </select></div>
+    </div>
+    <div>
+      <div><label for="new-admin-cb">Administrator(in):</label></div>
+      <div>
+        <input type="checkbox" name="new-admin" id="new-admin-cb" value="admin"
+               {% if lehrer.is_admin %}checked{% endif %}>
+      </div>
+    </div>
+  </div>
+
+  <p><input type="submit" value="Speichern"></p>
+</form>
+
+<br>
+
+<form method="post">
+  <h3>Benutzerkonto löschen</h3>
+  <input name="action" type="hidden" value="delete-account">
+  <p><input onclick="return confirm(delete_warn)" type="submit" value="Benutzerkonto jetzt löschen"></p>
+</form>
+{% endblock %}

nateman/templates/admin/lehrer/index.html.j2

@@ -0,0 +1,69 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/admin/lehrer/index.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Lehrerkonten{% endblock %}
+{% block header %}Lehrerkonten{% endblock %}
+
+{% set lehrer_list = Lehrer.query.order_by(Lehrer.kuerzel).all() %}
+
+{% block content %}
+<p><a href="{{ url_for('admin.lehrer.add') }}" data-icon="&#xf234;">Lehrer(in) hinzufügen</a></p>
+
+<p>Klicken Sie eine Zeile aus der folgenden Übersicht an, um ein bestehendes Benutzerkonto zu bearbeiten.</p>
+
+<table>
+  <thead>
+    <tr>
+      <th>Kürzel</th>
+      <th>E-Mail-Adresse</th>
+      <th>Admin</th>
+      <th>Beratungslehrer(in)</th>
+      <th>Passwort<br>gesetzt</th>
+    </tr>
+  </thead>
+  <tbody>
+    {% for l in lehrer_list %}
+      <tr class="clickable" tabindex="0" data-href="{{ url_for('admin.lehrer.edit', lehrer_id=l.id) }}">
+        <td>{{ l.kuerzel }}</td>
+        <td>
+          {% if l.email is not none %}
+            {{ l.email }}
+            {% if l.is_confirmed %}
+              <span class="positive-status" title="bestätigt"></span>
+            {% else %}
+              <span class="negative-status" title="nicht bestätigt"></span>
+            {% endif %}
+          {% else %}
+            <span class="detail">(keine)</span>
+          {% endif %}
+        </td>
+        <td>{{ 'ja' if l.is_admin else 'nein' }}</td>
+        <td>{{ l.beraet.name if l.beraet is not none else '<span class="detail">(keine Stufe)</span>' }}</td>
+        {% if l.pwd_changed %}
+          <td class="positive-status">ja</td>
+        {% else %}
+          <td class="negative-status">nein</td>
+        {% endif %}
+      </tr>
+    {% endfor %}
+  </tbody>
+</table>
+{% endblock %}

nateman/templates/admin/sql_access.html.j2

@@ -0,0 +1,83 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/admin/sql_access.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}SQL-Zugriff{% endblock %}
+{% block header %}SQL-Zugriff{% endblock %}
+
+{# result: Ergebnis einer SQL-Abfrage als sqlalchemy.engine.ResultProxy #}
+
+{% block content %}
+<p>
+  Diese Seite erlaubt direkten Zugriff auf die SQL-Datenbank von NateMan durch die Eingabe von SQL-Abfragen.<br>
+  <b>
+    Bei falscher Anwendung können Daten unwiderruflich verloren gehen.<br>
+    Außerdem kann es bei der Veränderung bestimmter Daten zu unerwarteten Fehlern in der NateMan-Anwendung kommen.<br>
+    <span class="marked">Benutzen Sie diese Seite nur, wenn Sie wissen, was Sie tun.</span>
+  </b>
+</p>
+
+<p>
+  {% set nateman_erm_url = url_for('static', filename='img/nateman-erm.svg') %}
+  <a href="{{ nateman_erm_url }}" target="_blank" rel="noreferrer noopener">
+    <img src="{{ nateman_erm_url }}" height="500" alt="Entity-Relationship-Modell der NateMan-Datenbank"
+         title="Entity-Relationship-Modell der NateMan-Datenbank">
+  </a>
+</p>
+
+<form method="post">
+  <p>
+    <textarea name="query" class="monospace" rows="8" cols="96" placeholder="SQL-Abfrage hier eingeben"
+              required autofocus>{{ query }}</textarea>
+  </p>
+
+  <p><input type="submit" value="Ausführen"></p>
+</form>
+
+{% if result is not none and result.returns_rows %}
+  {% set result_rows = result.fetchall() %}
+
+  <h3>Ergebnis ({{ result_rows|length }} Zeilen):</h3>
+
+  <table class="monospace">
+    <thead>
+      <tr>
+        {% for col_name in result.keys() %}
+          <th>{{ col_name }}</th>
+        {% endfor %}
+      </tr>
+    </thead>
+
+    <tbody>
+      {% for row in result_rows %}
+        <tr>
+          {% for value in row._mapping.values() %}
+            {% if value is none %}
+              <td class="detail">NULL</td>
+            {% else %}
+              <td>{{ value }}</td>
+            {% endif %}
+          {% endfor %}
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% endif %}
+{% endblock %}

nateman/templates/auth/account.html.j2

@@ -0,0 +1,67 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/auth/account.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Benutzereinstellungen{% endblock %}
+{% block header %}Benutzereinstellungen{% endblock %}
+
+{% block content %}
+<form method="post">
+  <div class="table-aligned">
+    <div>
+      <div><label for="current-password-input">Aktuelles Passwort:</label></div>
+      <div>
+        <input type="password" name="current-password" id="current-password-input" autocomplete="current-password"
+               required autofocus>
+      </div>
+    </div>
+    <div>
+      <div><label for="new-email-input">E-Mail-Adresse:</label></div>
+      <div>
+        <input type="email" name="new-email" id="new-email-input"
+               value="{% if g.lehrer.email %}{{ g.lehrer.email }}{% endif %}">
+      </div>
+      {% if g.lehrer.email is not none %}
+        <div>
+          {% if g.lehrer.is_confirmed %}
+            <span class="positive-status" title="bestätigt"></span>
+          {% else %}
+            <span class="negative-status">nicht bestätigt</span>
+          {% endif %}
+        </div>
+      {% endif %}
+    </div>
+    <div>
+      <div><label for="new-password-input">Neues Passwort:</label></div>
+      <div>
+        <input type="password" name="new-password" id="new-password-input" autocomplete="new-password" minlength="6">
+      </div>
+    </div>
+    <div>
+      <div><label for="new-password-confirm-input">&#x21B3; wiederholen:</label></div>
+      <div>
+        <input type="password" name="new-password-confirm" id="new-password-confirm-input" autocomplete="new-password">
+      </div>
+    </div>
+  </div>
+
+  <p><input type="submit" value="Speichern"></p>
+</form>
+{% endblock %}

nateman/templates/auth/login.html.j2

@@ -0,0 +1,48 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/auth/login.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Anmelden{% endblock %}
+{% block header %}Anmelden{% endblock %}
+
+{% block content %}
+<form method="post">
+
+  <div class="table-aligned">
+    <div>
+      <div><label for="kuerzel-input">Lehrerkürzel:</label></div>
+      <div><input type="text" name="kuerzel" id="kuerzel-input" autocomplete="username" required autofocus></div>
+    </div>
+    <div>
+      <div><label for="password-input">Passwort:</label></div>
+      <div><input type="password" name="password" id="password-input" autocomplete="current-password" required></div>
+    </div>
+    <div>
+      <div><label for="remember-me-cb">Angemeldet bleiben:</label></div>
+      <div><input type="checkbox" name="remember-me" id="remember-me-cb"></div>
+    </div>
+  </div>
+
+  <p>
+    <input type="submit" value="Anmelden">
+    <a href="{{ url_for('auth.password_reset') }}">Passwort vergessen</a>
+  </p>
+</form>
+{% endblock %}

nateman/templates/auth/password-change.html.j2

@@ -0,0 +1,48 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/auth/password-change.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Neues Passwort{% endblock %}
+{% block header %}Neues Passwort{% endblock %}
+
+{% block content %}
+<p>Bitte geben Sie ein neues Passwort für Ihr Benutzerkonto ein.</p>
+
+<form method="post">
+  <div class="table-aligned">
+    <div>
+      <div><label for="new-password-input">Neues Passwort:</label></div>
+      <div>
+        <input type="password" name="new-password" id="new-password-input" autocomplete="new-password" minlength="6"
+                  required autofocus>
+      </div>
+    </div>
+    <div>
+      <div><label for="new-password-confirm-input">&#x21B3; wiederholen:</label></div>
+      <div>
+        <input type="password" name="new-password-confirm" id="new-password-confirm-input" autocomplete="new-password"
+               required>
+      </div>
+    </div>
+  </div>
+
+  <p><input type="submit" value="Speichern"></p>
+</form>
+{% endblock %}

nateman/templates/auth/password-reset-do.html.j2

@@ -0,0 +1,46 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/auth/password-reset-do.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Passwort zurücksetzen{% endblock %}
+{% block header %}Passwort zurücksetzen{% endblock %}
+
+{% block content %}
+<form method="post">
+  <div class="table-aligned">
+    <div>
+      <div><label for="new-password-input">Neues Passwort:</label></div>
+      <div>
+        <input type="password" name="new-password" id="new-password-input" autocomplete="new-password" minlength="6"
+               required autofocus>
+      </div>
+    </div>
+    <div>
+      <div><label for="new-password-confirm-input">&#x21B3; wiederholen:</label></div>
+      <div>
+        <input type="password" name="new-password-confirm" id="new-password-confirm-input" autocomplete="new-password"
+               required>
+      </div>
+    </div>
+  </div>
+
+  <p><input type="submit" value="Passwort setzen"></p>
+</form>
+{% endblock %}

nateman/templates/auth/password-reset-send.html.j2

@@ -0,0 +1,43 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/auth/password-reset-send.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Passwort zurücksetzen{% endblock %}
+{% block header %}Passwort zurücksetzen{% endblock %}
+
+{% block content %}
+<form method="post">
+
+  <div class="table-aligned">
+    <div>
+      <div><label for="lehrer-kuerzel-input">Lehrerkürzel:</label></div>
+      <div>
+        <input type="text" name="lehrer-kuerzel" id="lehrer-kuerzel-input" autocomplete="username" required autofocus>
+      </div>
+    </div>
+    <div>
+      <div><label for="email-address-input">E-Mail-Adresse:</label></div>
+      <div><input type="email" name="email-address" id="email-address-input" required></div>
+    </div>
+  </div>
+
+  <p><input type="submit" value="Absenden"></p>
+</form>
+{% endblock %}

nateman/templates/base.html.j2

@@ -0,0 +1,203 @@
+<!DOCTYPE html>
+
+{# von Niklas Elsbrock #}
+
+
+{% macro zeitraum(klausur) -%}
+  {{- klausur.startperiod }}.
+  {%- if klausur.startperiod != klausur.endperiod -%}
+    &ndash;{{ klausur.endperiod }}.
+  {%- endif %}
+{%- endmacro %}
+
+
+<!-- generiert aus Template-Code von Niklas Elsbrock -->
+
+<html lang="de">
+<head>
+  <meta charset="utf-8">
+  <title>{% block title %}{% endblock %} &ndash; NateMan</title>
+
+  <link rel="icon" type="image/png" sizes="192x192"
+        href="{{ url_for('static', filename='img/logo.png') }}">
+  <link rel="apple-touch-icon" href="{{ url_for('static', filename='img/icon-apple.png') }}">
+
+  <!--[if !IE]><!-->
+  <link  rel="stylesheet" href="{{ url_for('static', filename='style.css') }}">
+  <!--<![endif]-->
+  <script>
+    window.onload = function() {
+      {% for message in get_flashed_messages(with_categories=True, category_filter='alert') %}
+        alert({{ message[1] | tojson }});
+      {% endfor %}
+
+      {% block js_window_onload %}{% endblock %}
+    };
+
+    {% block js_head %}{% endblock %}
+  </script>
+  {% block head %}{% endblock %}
+</head>
+
+
+<body>
+  <header>
+    <a id="nateman-logo-container" href="{{ url_for('klausuren.mine' if g.lehrer is not none else 'index.index') }}">
+      <img id="nateman-logo" alt="NateMan Logo"
+           src="{{ url_for('static', filename='img/logo.png') }}" draggable="false">
+    </a>
+    <h1 class="header-text">NateMan<span class="optional">&nbsp;&ndash;&nbsp;Nachschreibtermin-Manager</span></h1>
+  </header>
+
+  <!--[if IE]>
+    <p style="color: #ff0000; font-size: 25px;">
+      Diese Seite wird im Internet Explorer nicht richtig angezeigt.<br>
+      Um sie richtig angezeigt zu bekommen, benutzen Sie einen anderen Browser.
+    </p>
+  <![endif]-->
+
+  <nav>
+    {% if g.lehrer is not none %}
+      <a href="{{ url_for('auth.logout') }}" data-icon="&#xf2f5;">
+        <span>
+          Angemeldet als <b>{{ g.lehrer.kuerzel }}</b><br>
+          <b>Abmelden</b>
+        </span>
+      </a>
+    {% else %}
+      <a href="{{ url_for('auth.login') }}" data-icon="&#xf2f6;">
+        <span>Anmelden</span>
+      </a>
+
+      <a href="{{ url_for('auth.password_reset') }}" data-icon="&#xf1cd;">
+        <span>Passwort vergessen</span>
+      </a>
+    {% endif %}
+
+    <hr>
+    {% if g.lehrer is not none and g.lehrer.pwd_changed %}
+      <a href="{{ url_for('klausuren.mine') }}" data-icon="&#xf015;">
+        <span>Meine Klausuren</span>
+      </a>
+    {% endif %}
+
+    {% if g.lehrer is none or g.lehrer.pwd_changed %}
+      {% for stufe in Stufe.query.all() %}
+        <a href="{{ url_for('klausuren.stufe', stufe_name=stufe.name) }}" data-icon="&#xf00b;">
+          <span>Klausuren {{ stufe.name }}</span>
+        </a>
+      {% endfor %}
+    {% endif %}
+
+    {% if g.lehrer is not none and g.lehrer.pwd_changed %}
+      {% if g.lehrer.can_access() %}
+        <a href="{{ url_for('schueler.versaeumnisse') }}" data-icon="&#xf5ae;">
+          <span>Versäumnisse</span>
+        </a>
+
+        {%
+          if Klausurteilnahme.query.join(Klausur)
+             .filter(Klausurteilnahme.versaeumt)
+             .filter(Klausurteilnahme.nachgeschrieben == false)
+             .filter(Klausur.stufe_name.in_(g.lehrer.accessible_stufen(names=True)))
+             .count() != 0
+        %}
+          <hr>
+          <a href="{{ url_for('fileio.export') }}" data-icon="&#xf56e;">
+            <span>Nachschreibplan exportieren</span>
+          </a>
+        {% elif g.lehrer.is_admin %}
+          <hr>
+        {% endif %}
+
+        {% if g.lehrer.is_admin %}
+          <a href="{{ url_for('fileio.import') }}" data-icon="&#xf56f;">
+            <span>Klausurpläne importieren</span>
+          </a>
+        {% endif %}
+      {% endif %}
+      <hr>
+
+      <a href="{{ url_for('auth.account') }}" data-icon="&#xf4fe;">
+        <span>Mein Konto</span>
+      </a>
+
+      {% if g.lehrer.is_admin %}
+        <a href="{{ url_for('admin.index') }}" data-icon="&#xf084;">
+          <span>Administration</span>
+        </a>
+      {% endif %}
+    {% endif %}
+  </nav>
+
+  <div id="flash-container">
+    {% for message in get_flashed_messages(with_categories=True) %}
+      {% if message[0] != 'alert' %}
+        <div class="flash flash-{{ message[0] }}" tabindex="0">
+          {{ message[1] | replace('\n', '<br>') }}
+        </div>
+      {% endif %}
+    {% endfor %}
+  </div>
+
+  <div id="page-section">
+    <div id="page">
+      <main>
+        <noscript>
+          <p class="warn">
+            JavaScript ist in Ihrem Browser deaktiviert bzw. nicht unterstützt.
+            Diese Seite benötigt JavaScript, um richtig zu funktionieren.
+          </p>
+        </noscript>
+        {% if g.lehrer and g.lehrer.pwd_changed %}
+          {% if g.lehrer.email is none %}
+            <p class="warn">{#
+              #}Sie haben keine E-Mail-Adresse festgelegt.
+              <a href="{{ url_for('auth.account') }}">Festlegen</a>
+            </p>
+          {% elif not g.lehrer.is_confirmed %}
+            <p class="warn">Sie haben Ihre E-Mail-Adresse noch nicht bestätigt.</p>
+          {% endif %}
+        {% endif %}
+        <h2 class="page-heading">{% block header %}{% endblock %}</h2>
+        {% block content %}{% endblock %}
+      </main>
+
+      <footer>
+        <div class="footer-left">
+          <a href="{{ nateman_config['schule']['website-url'] }}">
+            <img id="school-logo"
+                 src="{{ nateman_config['schule'].get('schule.logo-url') or url_for('static', filename='img/school-logo.png') }}"
+                 alt="Schullogo" draggable="false">
+          </a>
+        </div>
+
+        <div class="footer-right">
+          <span style="float: left">
+            <a href="{{ nateman_config['schule']['website-url'] }}">
+              {{ nateman_config['schule']['name'] }}
+            </a>
+            <br>
+            <a href="https://github.com/nelsbrock/NateMan">
+              NateMan&nbsp;&ndash;&nbsp;Nachschreibtermin-Manager
+            </a>
+          </span>
+          <span style="float: right">
+            <a href="{{ nateman_config['schule']['imprint-url'] }}">Impressum</a>
+            &middot;
+            <a href="{{ nateman_config['schule']['privacy-policy-url'] }}">Datenschutz</a>
+            &middot;
+            <a href="{{ url_for('info.licenses') }}">Font-Lizenzen</a>
+          </span>
+        </div>
+      </footer>
+    </div>
+  </div>
+
+  <script src="{{ url_for('static', filename='script.js') }}" charset="utf-8"></script>
+  <script>
+    {% block js_body_end %}{% endblock %}
+  </script>
+
+</body>
+</html>

nateman/templates/email/base.html.j2

@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/email/base.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+<html lang="de">
+
+<head>
+  <meta charset="utf-8">
+</head>
+
+<body>
+  <h2>{% block header %}{% endblock %}</h2>
+  {% block content %}{% endblock %}
+  <hr>
+  <aside style="color: #777777">
+    Diese E-Mail wurde automatisch versandt. Eine Antwort ist nicht nötig.
+  </aside>
+</body>
+
+</html>

nateman/templates/email/confirmation.html.j2

@@ -0,0 +1,30 @@
+{% extends 'email/base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/email/confirmation.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block header %}Bestätigung Ihrer E-Mail-Adresse für NateMan{% endblock %}
+
+
+{% block content %}
+  <p>
+    Um die E-Mail-Adresse für Ihr Benutzerkonto beim Nachschreibtermin-Manager zu
+    bestätigen, klicken Sie <a href="{{ url_for('auth.confirm_email', token=token, _external=True) }}">hier</a>.
+  </p>
+{% endblock %}

nateman/templates/email/password-reset.html.j2

@@ -0,0 +1,31 @@
+{% extends 'email/base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/email/password-reset.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block header %}Passwortzurücksetzung{% endblock %}
+
+
+{% block content %}
+  <p>
+    Für Ihr Benutzerkonto beim Nachschreibtermin-Manager wurde eine Passwortzurücksetzung beantragt.<br>
+    Sie können Ihr Passwort <a href="{{ url_for('auth.password_reset', token=token, _external=True) }}">hier</a> ändern.
+    Der Link ist eine Stunde lang gültig.
+  </p>
+{% endblock %}

nateman/templates/email/reminder.html.j2

@@ -0,0 +1,43 @@
+{% extends 'email/base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/email/reminder.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block header %}Zur Erinnerung{% endblock %}
+
+
+{% block content %}
+  <p>
+    Folgende Klausuren müssen noch bearbeitet werden:
+    <ul>
+      {% for k in not_edited_list %}
+        <li>
+          <a href="{{ url_for('klausuren.edit', klausur_id=k.id, _external=True) }}">
+            {{ k.kursname }} ({{ k.date_formatted() }}; {{ k.stufe.name }})
+          </a>
+        </li>
+      {% endfor %}
+    </ul>
+  </p>
+
+  <p>
+    Klicken Sie <a href="{{ url_for('klausuren.mine', _external=True) }}">hier</a>,
+    um alle Klausuren von Ihnen zu sehen.
+  </p>
+{% endblock %}

nateman/templates/error/400.html.j2

@@ -0,0 +1,33 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/error/400.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Fehler{% endblock %}
+{% block header %}Fehler{% endblock %}
+
+{% block content %}
+<p>Ihr Browser hat eine ungültige Anfrage gesendet.</p>
+<p>
+  Dies kann passieren, wenn Sie versuchen Daten zu verändern,<br>
+  die in der Zwischenzeit von anderer Stelle verändert bzw. entfernt wurden.<br>
+  Versuchen Sie, die gerade ausgeführte Aktion zu wiederholen.
+</p>
+<p class="detail">400 BAD REQUEST</p>
+{% endblock %}

nateman/templates/error/403.html.j2

@@ -0,0 +1,28 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/error/403.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Kein Zugriff{% endblock %}
+{% block header %}Kein Zugriff{% endblock %}
+
+{% block content %}
+<p>Auf diese Seite haben Sie keinen Zugriff.</p>
+<p class="detail">403 FORBIDDEN</p>
+{% endblock %}

nateman/templates/error/404.html.j2

@@ -0,0 +1,28 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/error/404.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Fehler{% endblock %}
+{% block header %}Fehler{% endblock %}
+
+{% block content %}
+<p>Diese Seite existiert nicht.</p>
+<p class="detail">404 NOT FOUND</p>
+{% endblock %}

nateman/templates/error/500.html.j2

@@ -0,0 +1,28 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/error/500.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Serverfehler{% endblock %}
+{% block header %}Hoppala!{% endblock %}
+
+{% block content %}
+<p>Es ist ein serverseitiger Fehler aufgetreten.</p>
+<p class="detail">500 INTERNAL SERVER ERROR</p>
+{% endblock %}

nateman/templates/fileio/import.html.j2

@@ -0,0 +1,88 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/fileio/import.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Klausurpläne importieren{% endblock %}
+{% block header %}Klausurpläne importieren{% endblock %}
+
+{% set stufen_list = Stufe.query.all() %}
+
+{% block js_head %}
+  var plan_delete_warn = "Durch das Löschen eines Plans werden alle importierten sowie nachträglich hinzugefügten\n"
+                       + "Daten der Stufe (Klausurtermine, Klausuren, Schüler(innen)) unwiderruflich gelöscht.\n"
+                       + "Lehrerkonten bleiben unberührt.\n\nWollen Sie wirklich fortfahren?";
+
+  var import_warn = "Durch das Importieren von Klausurplänen werden bestehende importierte sowie nachträglich "
+                  + "hinzugefügte\nDaten (Klausurtermine, Klausuren, Schüler(innen)) aller Stufen, für die neue Pläne "
+                  + "importiert wurden, unwiderruflich gelöscht.\nBestehende Lehrerkonten bleiben unberührt.\n\n"
+                  + "Durch das Importieren von Koopschüler(inne)n werden alle bestehenden Koopschüler(innen) "
+                  + "gelöscht.\n\nWollen Sie wirklich fortfahren?";
+{% endblock %}
+
+{% block js_body_end %}
+  document.getElementById("import-button").onclick = function () {
+    if (!confirm(import_warn)) {
+      return false;
+    }
+    this.disabled = true;
+    this.value = 'Bitte warten...';
+    this.form.submit();
+    return true;
+  }
+{% endblock %}
+
+{% block content %}
+<form method="post" enctype="multipart/form-data">
+  <div class="table-aligned">
+    {% for stufe in stufen_list %}
+      <div>
+        <div><label for="plan_{{ stufe.name }}-input">Plan für {{ stufe.name }}:</label></div>
+        <div><input type="file" name="plan_{{ stufe.name }}" id="plan_{{ stufe.name }}-input" accept="text/xml"></div>
+        <div>
+          <input type="submit" name="del_{{ stufe.name }}" value="Plan löschen"
+                 onclick="return confirm(plan_delete_warn)" {% if stufe.import_date is none %}disabled{% endif %}>
+        </div>
+        <div class="detail">
+          {% if stufe.import_date is none %}
+            nicht importiert
+          {% else %}
+            importiert am {{ stufe.import_date.strftime("%d.%m.%Y") }}
+          {% endif %}
+        </div>
+      </div>
+    {% endfor %}
+  </div>
+  <p>
+    <label>
+      Koopschüler(innen)liste:
+      <input type="file" name="koopschueler" id="koopschueler-input" accept=".xlsx,.xlsm,.xltx,.xltm">
+    </label>
+  </p>
+  <p>
+    <label>
+      Passwort für neu registrierte Lehrer(innen):
+      <input name="new-lehrer-password" type="text" id="new-lehrer-password-input"
+             value="{{ nateman_config['default-new-lehrer-password'] }}">
+    </label>
+  </p>
+
+  <p><input type="submit" value="Importieren" id="import-button"></p>
+</form>
+{% endblock %}

nateman/templates/index/index.html.j2

@@ -0,0 +1,35 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/index/index.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Startseite{% endblock %}
+{% block header %}Startseite{% endblock %}
+
+{% block content %}
+<p>
+  Sie befinden sich auf der Startseite des Nachschreibtermin-Managers.<br>
+  Von hier aus können Sie die Klausurpläne für die Stufen
+  {% for stufe in Stufe.query.all() -%}
+    {%- if not loop.first -%}{%- if loop.last %} und {% else -%}, {% endif -%}{%- endif -%}
+    <a href="{{ url_for('klausuren.stufe', stufe_name=stufe.name) }}">{{ stufe.name }}</a>
+  {%- endfor %}
+  einsehen oder sich als Lehrer <a href="{{ url_for('auth.login') }}">anmelden</a>.
+</p>
+{% endblock %}

nateman/templates/info/licenses.html.j2

@@ -0,0 +1,38 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/info/licenses.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Lizenzen{% endblock %}
+{% block header %}Lizenzen{% endblock %}
+
+{% block content %}
+<h3>Schriftart: Lato</h3>
+<p>
+  Copyright (c) 2010-2015, Łukasz Dziedzic (dziedzic@typoland.com), with Reserved Font Name Lato.<br>
+  Licensed under the <a href="https://scripts.sil.org/OFL">SIL Open Font License, Version 1.1</a>.
+</p>
+
+<h3>Symbole (Icons): Font Awesome Free</h3>
+<p>
+  Font Awesome Free 5.13.1 by @fontawesome - <a href="https://fontawesome.com">https://fontawesome.com</a><br>
+  License - <a href="https://fontawesome.com/license/free">https://fontawesome.com/license/free</a>
+  (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License)
+</p>
+{% endblock %}

nateman/templates/klausuren/add.html.j2

@@ -0,0 +1,78 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/klausuren/add.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Klausur hinzufügen{% endblock %}
+{% block header %}Klausur hinzufügen{% endblock %}
+
+{% block js_body_end %}
+  var startperiod_input = document.getElementById('startperiod-input');
+  var endperiod_input = document.getElementById('endperiod-input');
+
+  startperiod_input.onchange = function () {
+    endperiod_input.min = parseInt(startperiod_input.value);
+  }
+
+  // beim Laden der Seite einmal ausführen
+  startperiod_input.onchange();
+{% endblock %}
+
+{% block content %}
+<form method="post">
+  <div class="table-aligned">
+    <div>
+      <div>Stufe:</div>
+      <div>{{ stufe.name }}</div>
+    </div>
+    <div>
+      <div><label for="kursname-input">Kursname:</label></div>
+      <div><input type="text" name="kursname" id="kursname-input" placeholder="z.B. M-GK3" required autofocus></div>
+    </div>
+    <div>
+      <div><label for="lehrer-select">Kurslehrer(in):</label></div>
+      <div>
+        <select name="lehrer" id="lehrer-select" required>
+          <option value="" selected disabled>Bitte auswählen</option>
+          {% for l in Lehrer.query.order_by(Lehrer.kuerzel).all() %}
+            <option value="{{ l.id }}">{{ l.kuerzel }}</option>
+          {% endfor %}
+        </select>
+      </div>
+    </div>
+    <div>
+      <div><label for="date-input">Klausurdatum:</label></div>
+      <div><input type="date" name="date" id="date-input" required></div>
+    </div>
+    <div>
+      <div>Klausurzeitraum:</div>
+      <div>
+            <input type="number" name="startperiod" id="startperiod-input" class="small" min="0" max="2147483647"
+                   required>{#
+            #}. bis
+            <input type="number" name="endperiod" id="endperiod-input" class="small" min="0" max="2147483647"
+                   required>{#
+            #}. Stunde
+          </div>
+    </div>
+  </div>
+
+  <p><input type="submit" value="Hinzufügen"></p>
+</form>
+{% endblock %}

nateman/templates/klausuren/edit.html.j2

@@ -0,0 +1,348 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/klausuren/edit.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}
+  Klausur: {{ klausur.kursname }}
+  ({{ klausur.date_formatted() }}; {{ klausur.lehrer.kuerzel }}, {{ klausur.stufe.name }})
+{% endblock %}
+{% block header %}
+  Klausur: {{ klausur.kursname }}
+  ({{ klausur.date_formatted() }}; {{ klausur.lehrer.kuerzel }}, {{ klausur.stufe.name }})
+{% endblock %}
+
+{# klausur #}
+{# kt_list: Liste aller Klausurteilnahmen dieser Klausur #}
+{# not_in_klausur_list: Liste aller Schüler dieser Stufe, die nicht in dieser Klausur sind #}
+{% set lehrer_can_access = g.lehrer.can_access(klausur.stufe) %}
+{% set is_bygone = klausur.is_bygone() %}
+{% set no_edit = (klausur.edited or not is_bygone) and not lehrer_can_access %}
+
+
+{% block js_body_end %}
+  var schuelerCBs = document.getElementsByClassName("schueler-cb");
+
+  for (scb of schuelerCBs) {
+    scb.onchange = function () {
+      if (this.checked) {
+        this.parentNode.classList.add("marked");
+      } else {
+        this.parentNode.classList.remove("marked");
+      }
+    }
+
+    // beim Laden der Seite einmal ausführen
+    scb.onchange();
+  }
+
+  {% if not no_edit %}
+
+    var noneVersaeumtCB = document.getElementById("none-versaeumt");
+
+    noneVersaeumtCB.onchange = function () {
+      for (scb of schuelerCBs) {
+        scb.disabled = this.checked;
+        if (this.checked) {
+          scb.checked = false;
+          scb.onchange();
+        }
+      }
+    };
+
+    // beim Laden der Seite einmal ausführen
+    noneVersaeumtCB.onchange();
+
+    {% if lehrer_can_access %}
+      var laengeSelect = document.getElementById("laenge-select");
+      var flagAsEditedCb = document.getElementById("flag-as-edited-cb");
+      flagAsEditedCb.onchange = function () {
+        laengeSelect.required = this.checked;
+      }
+
+      // beim Laden der Seite einmal ausführen
+      flagAsEditedCb.onchange();
+    {% endif %}
+
+    var editSubmit = document.getElementById("edit-submit");
+    editSubmit.onclick = function () {
+      if (!noneVersaeumtCB.checked) {
+        var ok = false;
+        for (scb of schuelerCBs) {
+          if (scb.checked) {
+            ok = true;
+            break;
+          }
+        }
+
+        if (!ok {% if lehrer_can_access %} && flagAsEditedCb.checked {% endif %}) {
+          alert("Bitte wählen Sie etwas aus.");
+          return false;
+        }
+      }
+
+      {% if not lehrer_can_access %}
+        return confirm("Wollen Sie wirklich speichern?\nSie können die Klausur danach nicht mehr bearbeiten.");
+      {% else %}
+        return true;
+      {% endif %}
+    };
+
+
+    var selectNode = document.getElementById("added-schueler");
+    var addNewKoopSchuelerFormNode = document.getElementById("add-new-schueler-form");
+    var nksNachnameInputNode = document.getElementById("new-schueler-nachname-input");
+    var nksVornameInputNode = document.getElementById("new-schueler-vorname-input");
+
+    selectNode.onchange = function() {
+      if (selectNode.value === "new-schueler") {
+        addNewKoopSchuelerFormNode.style.display = "";
+        nksNachnameInputNode.required = true;
+        nksVornameInputNode.required = true;
+      } else {
+        addNewKoopSchuelerFormNode.style.display = "none";
+        nksNachnameInputNode.required = false;
+        nksVornameInputNode.required = false;
+      }
+    };
+
+    // beim Laden der Seite einmal ausführen
+    selectNode.onchange();
+  {% endif %}
+
+  {% if lehrer_can_access %}
+    var new_startperiod_input = document.getElementById('new-startperiod-input');
+    var new_endperiod_input = document.getElementById('new-endperiod-input');
+
+    new_startperiod_input.onchange = function () {
+      new_endperiod_input.min = parseInt(new_startperiod_input.value);
+    }
+
+    // beim Laden der Seite einmal ausführen
+    new_startperiod_input.onchange();
+  {% endif %}
+{% endblock %}
+
+
+{% block content %}
+
+{% if not is_bygone %}
+  <p class="warn">Diese Klausur hat noch nicht stattgefunden.</p>
+{% endif %}
+
+{% if klausur.edited %}
+  <p class="warn">Diese Klausur wurde bereits bearbeitet.</p>
+{% endif %}
+
+<p class="description">
+  {{ zeitraum(klausur) }} Stunde;
+  {{ Klausurteilnahme.query.filter_by(klausur_id=klausur.id).count() }} Schüler(innen)
+</p>
+
+<form method="post">
+  <input type="hidden" name="action" value="edit">
+  <p>
+    <label>
+      Länge der Klausur:
+      <select name="laenge" id="laenge-select" required {% if no_edit %} disabled {% endif %}>
+        <option value="" {% if klausur.laenge is none %} selected {% endif %}
+                {% if not lehrer_can_access %} disabled {% endif %}>Bitte auswählen</option>
+        {% for l in nateman_config['klausuren']['klausurlaengen'] %}
+          <option value="{{ l }}" {% if l == klausur.laenge %} selected {% endif %}>{{ l }} Minuten</option>
+        {% endfor %}
+      </select>
+    </label>
+  </p>
+
+  {% if not no_edit %}
+    <p>
+      Setzen Sie <i>entweder</i> ein Häkchen dafür, dass kein(e) Schüler(in) die Klausur versäumt hat<br>
+      <i>oder</i> setzen Sie ein Häkchen bei allen Schüler(inne)n, die die Klausur versäumt haben.<br>
+      Gehört ein(e) Schüler(in) <i>nicht</i> mehr zum Kurs, entfernen Sie diese(n) durch Anklicken von 'x'.<br>
+      Klicken Sie anschließend auf 'Speichern'.
+    </p>
+  {% endif %}
+
+  <p>
+    <label>
+      <input type="checkbox" id="none-versaeumt" {% if no_edit %} disabled {% endif %}
+      {%
+        if klausur.edited and Klausurteilnahme.query.filter_by(klausur=klausur).filter_by(versaeumt=True).count() == 0
+      %}
+        checked
+      {% endif %}>
+      <b>kein(e)</b> Schüler(in) hat versäumt
+    </label>
+  </p>
+  <p id="schueler-list">
+    {% for kt in kt_list %}
+      <label class="schueler-cb-container">
+        <input type="checkbox" name="s_{{ kt.schueler.id }}" id="s_{{ kt.schueler.id }}" class="schueler-cb"
+               {% if kt.versaeumt %} checked {% endif %} {% if no_edit %} disabled {% endif %}>
+        {{ kt.schueler.nachname }}, {{ kt.schueler.vorname }}
+        <span class="detail">
+          ({% if kt.schueler.stammschule is not none %}{{ kt.schueler.stammschule.name }},
+           {% endif %}{{ kt.schueler.id }})
+        </span>
+      </label>
+      <input type="submit" form="remove-form" name="r_{{ kt.schueler.id }}" class="plain" value="&#xD7;"
+             title="entfernen" {% if no_edit %} disabled {% endif %}>
+      <br>
+    {% endfor %}
+  </p>
+  <p>
+    <label>
+      Bemerkung:
+      <input type="text" name="annotation" maxlength="{{ nateman_config['klausuren']['max-annotation-length'] }}"
+           value="{% if klausur.annotation %}{{ klausur.annotation }}{% endif %}" placeholder="optional"
+           {% if no_edit %} disabled {% endif %}>
+    </label>
+  </p>
+  {% if lehrer_can_access %}
+    <p>
+      <label>
+        <input type="checkbox" name="flag-as-edited" id="flag-as-edited-cb"
+               {% if is_bygone %} checked {% endif %}>
+        als bearbeitet markieren
+      </label>
+    </p>
+  {% endif %}
+  <p><input type="submit" id="edit-submit" value="Speichern" {% if no_edit %} disabled {% endif %}></p>
+</form>
+
+<form id="remove-form" method="post">
+  <input type="hidden" name="action" value="remove-schueler">
+</form>
+
+
+{% if not no_edit %}
+  <hr>
+
+  <form method="post">
+    <input type="hidden" name="action" value="add-schueler">
+
+    <p>
+      Fügen Sie eine(n) Schüler(in) hinzu, falls der/die Schüler(in) nicht bereits<br>
+      automatisch in der obigen Liste aufgeführt sein sollte.<br>
+      Nach dem Hinzufügen kann der/die Schüler(in) als versäumend markiert werden.
+    </p>
+
+    <h3>Schüler(in) hinzufügen:
+      <select name="added-schueler" id="added-schueler" required>
+        <option value="" selected disabled>Bitte auswählen</option>
+        <option value="new-schueler">Neue(n) Schüler(in) hinzufügen...</option>
+        {% for schueler in not_in_klausur_list %}
+          <option value="{{ schueler.id }}">{{ schueler.nachname }}, {{ schueler.vorname }}
+            ({% if schueler.stammschule is not none %}{{ schueler.stammschule.name }}, {% endif %}{{ schueler.id }})
+          </option>
+        {% endfor %}
+      </select>
+    </h3>
+
+    <div id="add-new-schueler-form">
+      <p>
+        Bevor Sie eine(n) neue(n) Schüler(in) hinzufügen, überprüfen Sie bitte,
+        ob diese(r) nicht bereits in der obigen Auswahl vorhanden ist.<br>
+        <b>Tipp:</b> In den meisten Browsern können Sie bei geöffneter Auswahl
+        den Nachnamen eingeben, um nach einem/einer Schüler(in) zu suchen.
+      </p>
+
+      <div class="table-aligned">
+        <div>
+          <div><label for="new-schueler-nachname-input">Nachname:</label></div>
+          <div><input type="text" name="new-schueler-nachname" id="new-schueler-nachname-input"></div>
+        </div>
+        <div>
+          <div><label for="new-schueler-nachname-input">Vorname:</label></div>
+          <div><input type="text" name="new-schueler-vorname" id="new-schueler-vorname-input"></div>
+        </div>
+        <div>
+          <div><label for="new-schueler-stammschule-select">Stammschule:</label></div>
+          <div>
+            <select name="new-schueler-stammschule" id="new-schueler-stammschule-select">
+              <option value="" selected>(kein(e) Koop-Schüler(in))</option>
+              {% for ks in Koopschule.query.all() %}
+                <option value="{{ ks.kuerzel }}">{{ ks.name }}</option>
+              {% endfor %}
+            </select>
+          </div>
+        </div>
+      </div>
+
+    </div>
+
+    <fieldset>
+      <label><input type="radio" name="add-to" value="klausur">Hinzufügen zu dieser Klausur</label><br>
+      <label><input type="radio" name="add-to" value="kurs" checked>Hinzufügen zu allen Klausuren dieses Kurses</label>
+    </fieldset>
+
+    <p><input type="submit" value="Hinzufügen"></p>
+  </form>
+
+  {% if lehrer_can_access %}
+    <hr>
+    <h3>Erweiterte Einstellungen</h3>
+
+    <form method="post">
+      <input type="hidden" name="action" value="edit-advanced">
+      <div class="table-aligned">
+        <div>
+          <div><label for="new-lehrer-select">Kurslehrer(in):</label></div>
+          <div>
+            <select name="new-lehrer" id="new-lehrer-select">
+              {% for l in Lehrer.query.order_by(Lehrer.kuerzel).all() %}
+                <option value="{{ l.id }}" {% if l == klausur.lehrer %}selected{% endif %}>{{ l.kuerzel }}</option>
+              {% endfor %}
+            </select>
+          </div>
+        </div>
+        <div>
+          <div><label for="new-date-input">Klausurdatum:</label></div>
+          <div>
+            <input type="date" name="new-date" id="new-date-input"
+                     value="{{ klausur.date.strftime('%Y-%m-%d') }}" required>
+          </div>
+        </div>
+        <div>
+          <div>Klausurzeitraum:</div>
+          <div>
+            <input type="number" name="new-startperiod" id="new-startperiod-input" class="small" min="0"
+                   max="2147483647" value="{{ klausur.startperiod }}" required>{#
+            #}. bis
+            <input type="number" name="new-endperiod" id="new-endperiod-input" class="small" min="0" max="2147483647"
+                   value="{{ klausur.endperiod }}" required>{#
+            #}. Stunde
+          </div>
+        </div>
+      </div>
+
+      <p><input type="submit" value="Speichern"></p>
+    </form>
+
+    <form method="post">
+      <input type="hidden" name="action" value="delete">
+      <p>
+        <input type="submit" value="Diese Klausur löschen"
+             onclick="return confirm('Soll diese Klausur wirklich gelöscht werden?')">
+      </p>
+    </form>
+  {% endif %}
+
+{% endif %}
+{% endblock %}

nateman/templates/klausuren/mine.html.j2

@@ -0,0 +1,91 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/klausuren/mine.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Meine Klausuren{% endblock %}
+{% block header %}Meine Klausuren{% endblock %}
+
+{# klausuren_anstehend #}
+{# klausuren_vergangen #}
+
+{% block content %}
+
+<h3>vergangen:</h3>
+
+{% if klausuren_vergangen|length == 0 %}
+  <p>keine</p>
+{% else %}
+  <table>
+    <thead>
+      <tr>
+        <th>Datum</th>
+        <th>Stufe</th>
+        <th>Kurs</th>
+        <th>Zeitraum</th>
+        <th>bearbeitet</th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for kv in klausuren_vergangen %}
+        <tr class="clickable" tabindex="0" data-href="{{ url_for('klausuren.edit', klausur_id=kv.id) }}">
+          <td>{{ kv.date_formatted() }}</td>
+          <td>{{ kv.stufe.name }}</td>
+          <td>{{ kv.kursname }}</td>
+          <td>{{ zeitraum(kv) }} Std.</td>
+          {% if kv.edited %}
+            <td class="positive-status">ja</td>
+          {% else %}
+            <td class="negative-status">nein</td>
+          {% endif %}
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% endif %}
+
+
+<h3>anstehend:</h3>
+
+{% if klausuren_anstehend|length == 0 %}
+  <p>keine</p>
+{% else %}
+  <table>
+    <thead>
+      <tr>
+        <th>Datum</th>
+        <th>Stufe</th>
+        <th>Kurs</th>
+        <th>Zeitraum</th>
+      </tr>
+    </thead>
+    <tbody>
+      {% for ka in klausuren_anstehend %}
+        <tr class="clickable" tabindex="0" data-href="{{ url_for('klausuren.edit', klausur_id=ka.id) }}">
+          <td>{{ ka.date_formatted() }}</td>
+          <td>{{ ka.stufe.name }}</td>
+          <td>{{ ka.kursname }}</td>
+          <td>{{ zeitraum(ka) }} Std.</td>
+        </tr>
+      {% endfor %}
+    </tbody>
+  </table>
+{% endif %}
+
+{% endblock %}

nateman/templates/klausuren/stufe.html.j2

@@ -0,0 +1,113 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/klausuren/stufe.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Klausuren {{ stufe.name }}{% endblock %}
+{% block header %}Klausuren {{ stufe.name }}{% endblock %}
+
+{# stufe #}
+{# dates_anstehend #}
+{# dates_vergangen #}
+{% set lehrer_can_access = g.lehrer is not none and g.lehrer.can_access(stufe) %}
+{% set klausur_count = dates_anstehend | length + dates_vergangen | length %}
+{% set beratungslehrer_list = Lehrer.query.filter_by(beraet=stufe).all() %}
+
+{% block content %}
+
+<p class="description">
+  Beratungslehrer(innen):
+  {% if beratungslehrer_list|length == 0 %}
+    keine
+  {% else %}
+    {% for l in beratungslehrer_list %}
+      {{ l.kuerzel }}{% if l.email is not none %} &lt;<a href="mailto:{{ l.email }}">{{ l.email }}</a>&gt;{% endif %}<!--
+      -->{% if not loop.last %},{% endif %}
+    {% endfor %}
+  {% endif %}
+</p>
+
+{% if lehrer_can_access %}
+  <p><a href="{{ url_for('klausuren.add', stufe_name=stufe.name) }}" data-icon="&#xf0fe;">Klausur hinzufügen</a></p>
+{% endif %}
+
+{% if klausur_count != 0 %}
+  <p><a href="#heute" data-icon="&#xf103;">zu heute springen</a></p>
+{% endif %}
+
+{% if klausur_count == 0 %}
+  <p>keine</p>
+{% else %}
+  {% for dates_list in (dates_anstehend, dates_vergangen) %}
+    {% if loop.index0 == 1 %}
+      <div id="heute" class="labeled-hr" data-icon="&#xf073;">heute ({{ util.format_date(datetime.now()) }})</div>
+    {% endif %}
+
+    {% for date in dates_list %}
+      {% set date_klausur_list = Klausur.query.filter_by(stufe=stufe, date=date).all() %}
+      {% set date_iso = date.strftime('%Y-%m-%d') %}
+
+      <h3>
+        <span>
+          {{ util.format_date(date) }}:
+          <a class="scroll-anchor" name="{{ date_iso }}" href="#{{ date_iso }}"></a>
+        </span>
+      </h3>
+
+      <table>
+        <thead>
+          <tr>
+            <th>Lehrer(in)</th>
+            <th>Kurs</th>
+            <th>Zeitraum</th>
+            {% if lehrer_can_access %}
+              <th>bearbeitet</th>
+              <th>Bemerkung</th>
+            {% endif %}
+          </tr>
+        </thead>
+        <tbody>
+          {% for k in date_klausur_list %}
+            <tr {% if lehrer_can_access %} class="clickable" tabindex="0"
+                data-href="{{ url_for('klausuren.edit', klausur_id=k.id) }}" {% endif %}>
+              <td>{{ k.lehrer.kuerzel }}</td>
+              <td>{{ k.kursname }}</td>
+              <td>{{ zeitraum(k) }} Std.</td>
+              {% if lehrer_can_access %}
+                {% if k.edited %}
+                  <td class="positive-status">ja</td>
+                {% else %}
+                  <td class="negative-status">nein</td>
+                {% endif %}
+
+                {% if k.annotation is not none %}
+                  <td class="description">{{ k.annotation }}</td>
+                {% else %}
+                  <td class="detail">keine</td>
+                {% endif %}
+              {% endif %}
+            </tr>
+          {% endfor %}
+        </tbody>
+      </table>
+    {% endfor %}
+  {% endfor %}
+{% endif %}
+
+{% endblock %}

nateman/templates/schueler/versaeumnisse.html.j2

@@ -0,0 +1,94 @@
+{% extends 'base.html.j2' %}
+
+{#
+  NateMan – Nachschreibtermin-Manager
+  templates/schueler/versaeumnisse.html.j2
+  Copyright © 2020  Niklas Elsbrock
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#}
+
+{% block title %}Versäumnisse{% endblock %}
+{% block header %}Versäumnisse{% endblock %}
+
+{#
+  versaeumt_dict: Dictinonary mit jeweils eimem Tupel aus zwei Listen aller nicht nachgeschriebenen bzw.
+                  nachgeschriebenen versäumten Klausurteilnahmen pro Stufe, auf die der angemeldete Lehrer Zugriff hat
+#}
+
+{% block content %}
+
+<form method="post">
+  {% for stufe, versaeumt_listen in versaeumt_dict.items() %}
+    <h3>{{ stufe.name }}</h3>
+
+    {% for versaeumt_list in versaeumt_listen %}
+      <h4>
+        {% if loop.first %}
+          noch nicht nachgeschrieben:
+        {% else %}
+          bereits nachgeschrieben:
+        {% endif %}
+      </h4>
+      {% if versaeumt_list|length == 0 %}
+        <p>keine</p>
+      {% else %}
+        <table>
+          <thead>
+            <tr>
+              <th>Schüler(in)</th>
+              <th>Klausurdatum</th>
+              <th>Kurs</th>
+              <th>Lehrer</th>
+              <th>Länge</th>
+              <th>Bemerkung</th>
+              <th>attestiert</th>
+              <th>nachgeschrieben</th>
+            </tr>
+          </thead>
+          <tbody>
+            {% for kt in versaeumt_list %}
+              <tr class="clickable" tabindex="0" data-href="{{ url_for('klausuren.edit', klausur_id=kt.klausur.id) }}">
+                <td>{{ kt.schueler.nachname }}, {{ kt.schueler.vorname }}
+                  <span class="detail">({% if kt.schueler.stammschule is not none %}{{ kt.schueler.stammschule.name }},
+                                        {% endif %}{{ kt.schueler.id }})</span>
+                </td>
+                <td>{{ kt.klausur.date_formatted() }}</td>
+                <td>{{ kt.klausur.kursname }}</td>
+                <td>{{ kt.klausur.lehrer.kuerzel }}</td>
+                <td>{{ kt.klausur.laenge }}</td>
+
+                {% if kt.klausur.annotation is not none %}
+                  <td class="description">{{ kt.klausur.annotation }}</td>
+                {% else %}
+                  <td class="detail">keine</td>
+                {% endif %}
+
+                <td><input type="checkbox" name="a_{{ kt.klausur.id }}:{{ kt.schueler.id }}"
+                           onclick="event.stopPropagation()" {% if kt.attestiert %}checked{% endif %}></td>
+                <td><input type="checkbox" name="n_{{ kt.klausur.id }}:{{ kt.schueler.id }}"
+                           onclick="event.stopPropagation()" {% if kt.nachgeschrieben %}checked{% endif %}></td>
+              </tr>
+            {% endfor %}
+          </tbody>
+        </table>
+      {% endif %}
+    {% endfor %}
+    <hr>
+  {% endfor %}
+
+  <p><input type="submit" value="Speichern"></p>
+</form>
+
+{% endblock %}

nateman/util.py

@@ -0,0 +1,104 @@
+# NateMan – Nachschreibtermin-Manager
+# util.py
+# Copyright © 2020  Niklas Elsbrock
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+"""
+Enthält nützliche, von NateMan unabhängige Funktionen.
+"""
+
+import random
+import re
+
+from datetime import date
+
+EMAIL_ADDRESS_REGEX = re.compile(r"^[a-zA-Z0-9!#$%&‘*+–/=?^_`{|}~](\.?[a-zA-Z0-9!#$%&‘*+–/=?^_`{|}~])*"
+                                 r"@[a-zA-Z0-9-](\.?[a-zA-Z0-9-])*$")
+
+_RUASS_TRANSLATION = {ord("ä"): "ae", ord("Ä"): "Ae",
+                      ord("ö"): "oe", ord("Ö"): "Oe",
+                      ord("ü"): "ue", ord("Ü"): "Ue",
+                      ord("ß"): "ss", ord("ẞ"): "Ss"}
+""" Übersetzungstabelle für replace_umlauts_and_sharp_s """
+
+
+def email_address_safe(s: str) -> str:
+    """
+    Ersetzt die Buchstaben ä, ö, ü und ß (als Klein- oder Großbuchstabe) im String s durch die entsprechende
+    Zeichenfolge ohne Umlaute bzw. Eszett und wandelt alle Buchstaben in Kleinbuchstaben um.
+    von Niklas Elsbrock.
+    """
+    return s.translate({
+        ord("ä"): "ae", ord("Ä"): "Ae",
+        ord("ö"): "oe", ord("Ö"): "Oe",
+        ord("ü"): "ue", ord("Ü"): "Ue",
+        ord("ß"): "ss", ord("ẞ"): "Ss"
+    }).lower()
+
+
+_URI_SAFE_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"
+""" Zeichensatz für :func:`random_uri_safe_string` """
+
+_SYSTEM_RANDOM = random.SystemRandom()
+
+
+def random_uri_safe_string(length: int) -> str:
+    """
+    Generiert einen zufälligen String der Länge ``length`` aus URI-freundlichen Zeichen
+    (Buchstaben, Bindestrich, Unterstrich).
+    von Niklas Elsbrock.
+
+    :param length: Länge des zu generierenden Strings
+    :return: generierter String
+    """
+    return "".join(_SYSTEM_RANDOM.choice(_URI_SAFE_CHARS) for _ in range(length))
+
+
+def validate_bcrypt_password(password: str) -> bool:
+    """
+    Überprüft, ob der übergebene String ``password`` als Passwort verwendet werden kann
+    (d.h. ob das Passwort höchstens 72 Bytes groß ist).
+    von Niklas Elsbrock.
+
+    :param password: zu validierender String
+    :return: ``True`` falls ja, ``False`` falls nein
+    """
+    return len(password.encode("utf-8")) <= 72
+
+
+def format_date(date_: date) -> str:
+    """
+    Formatiert ein Datumsobjekt nach dem deutschen Datumsformat, inklusive Wochentagkürzel (WW, DD.MM.YYYY).
+    von Niklas Elsbrock.
+
+    :param date_: zu formatierendes Datum
+    :return: formatiertes Datum als String
+    """
+    return date_.strftime("%a, %d.%m.%Y")
+
+
+def is_integer_string(s: str) -> bool:
+    """
+    Überprüft, ob der String ``s`` in einen Integer umgewandelt werden kann
+
+    :param s: zu überprüfender String
+    :return: ``True`` falls ja, ``False`` falls nein
+    """
+    try:
+        int(s)
+    except ValueError:
+        return False
+    else:
+        return True

setup.py

@@ -0,0 +1,25 @@
+"""
+Setupskript.
+von Niklas Elsbrock
+"""
+
+from setuptools import find_packages, setup
+
+setup(
+    name="NateMan",
+    version="1.2.0",
+    author="Niklas Elsbrock, Johannes Bingel",
+    packages=find_packages(),
+    include_package_data=True,
+    zip_safe=False,
+    python_requires="~=3.6",
+    install_requires=[
+        "Flask",
+        "Flask-SQLAlchemy>=2.0.0",
+        "Click",
+        "PyYAML",
+        "bcrypt",
+        "openpyxl"
+    ],
+    entry_points={"console_scripts": ["nateman = nateman.commands:cli"]}
+)

wsgi.py

@@ -0,0 +1,12 @@
+"""
+WSGI-Schnittstelle. Startet NateMan.
+von Niklas Elsbrock
+"""
+
+from nateman import create_app
+
+
+if __name__ == "__main__":
+    create_app().run()
+else:
+    app = create_app()