424 lines
14 KiB
Python
424 lines
14 KiB
Python
import os
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import re
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from datetime import datetime
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from typing import List, cast
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import flask_login
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from flask_socketio import join_room
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import pytz
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from flask import (
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Blueprint,
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abort,
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current_app,
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flash,
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make_response,
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redirect,
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render_template,
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request,
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send_from_directory,
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session,
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url_for,
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)
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from . import socketio
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from .auth import check_password, user_loader
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from .forms import DeckForm, InfoBannerForm, LoginForm, PasswordForm
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from .models import Course, Deck, InfoBanner, Password, db
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from .utils import (
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create_token,
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generate_password,
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get_active_banner,
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get_all_courses,
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get_available_decks,
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get_passwords,
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get_token,
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get_unlocked_decks,
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is_deck_unlocked,
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retrieve_token,
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serialize_token,
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update_token,
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get_course
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)
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main = Blueprint('main', __name__)
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slidev_deck_pattern = re.compile(r"^\/slides\/[^\/]+\/\d*(?:\?.*)?$")
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slidev_all_pattern = re.compile(r"^\/slides\/([^\/]+)\/([^\/]+)(?:\/presenter)?\/(\d+)(?:\?.*)?$")
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@socketio.on("connect")
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def on_connect():
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if flask_login.current_user.is_authenticated:
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join_room("instructor")
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@main.after_request
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def inject_confused_button(response):
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if True:
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if (slidev_deck_pattern.match(request.path) or request.path == '/') and response.content_type.startswith('text/html') and not flask_login.current_user.is_authenticated :
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if response.direct_passthrough:
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response.direct_passthrough = False
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body = response.get_data(as_text=True)
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insert_at = body.find('</body>')
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if insert_at != -1:
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button_html = """
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<button id="confused-button" style="
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position: fixed;
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bottom: 1.5rem;
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right: 1.5rem;
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z-index: 9999;
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background-color: #4f8cff;
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color: white;
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font-size: 1rem;
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font-weight: bold;
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border: none;
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border-radius: 9999px;
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padding: 1rem;
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box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
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cursor: pointer;
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transition: background-color 0.3s, transform 0.2s;"
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title="Didn't understand? Click!">
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Ich habe das nicht verstanden
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</button>
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<script>
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document.getElementById('confused-button').addEventListener('click', () => {
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fetch('/confused', {method: 'POST'})
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.then(response => {
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if (response.ok) {
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alert('Alles klar! Ich versuche es besser zu erklären. Melde dich, wenn du eine spezifische Frage hast oder noch etwas unklar bleibt.');
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}
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}).catch(error => console.error('Error:', error));
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});
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</script>
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"""
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body = body[:insert_at] + button_html + body[insert_at:]
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response.set_data(body)
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return response
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@main.route('/')
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def index():
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token = get_token()
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if not token:
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return redirect(url_for("main.set_token"))
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else:
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return render_template('index.html', active_banner=get_active_banner(), decks=get_unlocked_decks(token), user_name=token.name, active_course_name=token.active_course.name, courses=get_all_courses())
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def set_cookie(token):
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next_url = session.pop('next_url', None)
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if not next_url:
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next_url = url_for("main.index")
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resp = make_response(redirect(next_url))
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resp.set_cookie(
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'access_token',
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serialize_token(token),
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httponly=True,
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samesite='Lax',
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path='/'
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)
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return resp
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@main.route('/set_token', methods=['POST', 'GET'])
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def set_token():
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"""
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Handles.
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GET: Renders the registration form.
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POST: Processes the form submission.
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"""
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if request.method == 'POST':
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# Get form data
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user_name = request.form.get('username')
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# Simple validation
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if not user_name:
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flash('Username is required.', 'error')
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return render_template('set_token.html')
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token = retrieve_token(user_name)
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if not token:
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flash(f'The username "{user_name}" does not exist.', 'error')
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return render_template('set_token.html')
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print(f"Set token {session}")
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return set_cookie(token)
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return render_template('set_token.html')
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@main.route('/register', methods=['POST', 'GET'])
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def register():
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"""
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Handles user registration.
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GET: Renders the registration form.
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POST: Processes the form submission.
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"""
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if request.method == 'POST':
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# Get form data
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user_name = request.form.get('username')
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acknowledge = request.form.get('acknowledge')
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# Simple validation
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if not user_name:
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flash('Username is required.', 'error')
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return render_template('register.html')
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if retrieve_token(user_name):
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flash(f'The username "{user_name}" is already taken.', 'error')
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return render_template('register.html')
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if not acknowledge:
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flash('You must acknowledge the important information to proceed.', 'error')
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return render_template('register.html')
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# If all validation passes, "register" the user
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token = create_token(user_name)
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print(f"User registered: {user_name}")
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return set_cookie(token)
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# If GET request, render the form
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return render_template('register.html')
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@main.route('/logout', methods=['POST'])
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def logout():
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resp = make_response(redirect(url_for('main.index'))) # Redirect to a safe page, e.g., index or login
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resp.set_cookie('access_token', '', expires=0) # Clears the cookie
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return resp
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@main.route('/switch_course/<new_course>', methods=['POST'])
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def switch_course(new_course: int):
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token = get_token()
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if not token:
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return redirect(url_for('main.set_token'))
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switched = get_course(new_course)
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if switched:
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token.active_course = switched
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db.session.commit()
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return redirect(url_for("main.index"))
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@main.route('/admin/login', methods=['POST', 'GET'])
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def admin_login():
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form = LoginForm()
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if form.validate_on_submit():
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assert isinstance(form.user_name.data, str)
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assert isinstance(form.password.data, str)
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user_name: str = form.user_name.data
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password: str = form.password.data
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user = user_loader(user_name)
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if user and check_password(user, password):
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flask_login.login_user(user)
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next = request.args.get('next')
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if next is None:
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return redirect(url_for('main.index'))
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if not next.startswith('/admin'):
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return abort(400)
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return redirect(next)
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else:
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flash('Incorrect username or password. Please try again.', 'error')
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return render_template("admin_login.html", form=form)
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def process_access_code(access_code: str):
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token = get_token()
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print(f"Process {token}")
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if not token:
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# remember where the user wanted to go
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session['next_url'] = url_for('main.access_get', access_code=access_code)
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print(f"Process {session}")
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return redirect(url_for('main.set_token'))
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password = db.session.execute(
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db.select(Password)
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.where(Password.value == access_code)
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).scalar_one_or_none()
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if password is not None:
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if not password.is_expired():
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update_token(password.decks)
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else:
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flash('Password has expired. Please obtain a new one.', 'expired')
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else:
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flash('Password is not valid. Please check the code and try again.', 'error')
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return redirect(url_for('main.index'))
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@main.route('/access', methods=['POST'])
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def access_post():
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access_code = request.form.get('password')
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if not access_code:
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return redirect(url_for("main.index"))
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return process_access_code(access_code)
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# Route for direct link/QR code access (GET)
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@main.route('/access/<access_code>', methods=['GET'])
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def access_get(access_code: str):
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return process_access_code(access_code)
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@main.route('/confused', methods=['POST'])
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def confused():
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socketio.emit(
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"confused",
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{
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"time": datetime.utcnow().isoformat()
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},
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to="instructor"
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)
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return ("", 204)
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@main.route('/slides/<course_folder>/<deck>/')
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@main.route('/slides/<course_folder>/<deck>/<path:path>')
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def serve_deck(deck, course_folder, path='index.html'):
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course = db.session.execute(db.select(Course).where(Course.folder==course_folder)).scalar()
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if not course:
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abort(404)
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assert isinstance(course, Course)
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deck = db.session.execute(db.select(Deck).where(Deck.deck==deck and Deck.course_id == course.id)).scalar()
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if not deck:
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abort(404)
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assert isinstance(deck, Deck)
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if not is_deck_unlocked(deck.deck):
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return redirect(url_for('main.index'))
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slides_dir = os.path.join(current_app.config['SLIDES_DIR'], course.folder)
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deck_path = os.path.join(slides_dir, deck.deck)
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if not os.path.exists(deck_path):
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return f"Deck '{deck}' not found.", 404
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if slidev_all_pattern.match(request.path):
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return send_from_directory(deck_path, deck.index_file)
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requested_file = os.path.join(deck_path, path)
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if os.path.isfile(requested_file):
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return send_from_directory(deck_path, path)
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abort(404)
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@main.route('/admin', methods=['GET', 'POST'])
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@flask_login.login_required
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def admin():
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active_course = get_course(flask_login.current_user.active_course_id)
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if active_course is None:
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raise Exception
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deck_form = DeckForm()
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password_form = PasswordForm()
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if request.method == 'GET':
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password_form.value.data = generate_password()
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deck_form.deck.choices = get_available_decks(current_app, active_course)
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decks = active_course.decks
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password_form.decks.choices = [(deck.id, deck.name) for deck in decks]
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if request.method == 'POST':
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if "submit_deck" in request.form and deck_form.validate():
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deck = Deck(
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name=cast(str,deck_form.name.data),
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deck=deck_form.deck.data,
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course=active_course,
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description=cast(str,deck_form.description.data),
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)
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db.session.add(deck)
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db.session.commit()
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if "submit_password" in request.form:
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if password_form.validate():
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value: str = password_form.value.data
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expires_at: datetime | None = password_form.expires_at.data
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if expires_at:
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tz = pytz.timezone('Europe/Berlin')
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utc = pytz.utc
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expires_at = tz.localize(expires_at).astimezone(utc)
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password = Password(
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value=value,
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expires_at=expires_at
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)
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decks = db.session.execute(db.select(Deck).filter(Deck.id.in_(cast(List[Deck], password_form.decks.data)))).scalars()
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password.decks.extend(decks)
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db.session.add(password)
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db.session.commit()
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else:
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# Form was submitted but validation failed
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for field, errors in password_form.errors.items():
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for error in errors:
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print(f"Error in {getattr(password_form, field).label.text}: {error}", flush=True)
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return redirect(url_for('main.admin'))
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return render_template("admin.html", deck_form=deck_form, password_form=password_form, decks=decks, passwords=get_passwords(active_course), courses=get_all_courses(), active_course_name=active_course.name)
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@main.route('/admin/switch_course/<new_course>', methods=['POST'])
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@flask_login.login_required
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def switch_course_admin(new_course: int):
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user = flask_login.current_user
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if get_course(new_course):
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user.active_course_id = new_course
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return redirect(url_for("main.admin"))
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@main.route('/admin/banner', methods=['POST', 'GET'])
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@flask_login.login_required
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def banner():
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banner_form = InfoBannerForm()
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if banner_form.validate_on_submit():
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assert isinstance(banner_form.content.data, str)
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content : str = banner_form.content.data
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banner = InfoBanner(content=content)
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db.session.add(banner)
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db.session.commit()
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return render_template("banner.html", banner_form=banner_form, banners=db.session.execute(db.select(InfoBanner)).scalars())
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@main.route('/admin/decks/<int:deck_id>/delete', methods=['POST'])
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@flask_login.login_required
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def delete_deck(deck_id: int):
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deck = Deck.query.get_or_404(deck_id)
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db.session.delete(deck)
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db.session.commit()
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return redirect(url_for('main.admin'))
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@main.route('/admin/passwords/<int:password_id>/delete', methods=['POST'])
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@flask_login.login_required
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def delete_password(password_id: int):
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password = Password.query.get_or_404(password_id)
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db.session.delete(password)
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db.session.commit()
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return redirect(url_for('main.admin'))
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@main.route('/admin/banner/show/<int:banner_id>', methods=['POST'])
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@flask_login.login_required
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def set_active_banner(banner_id):
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banner = InfoBanner.query.get(banner_id)
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if banner:
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# ensures that only one banner is active at all times
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active_banner = get_active_banner()
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if active_banner:
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active_banner.is_active = False
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banner.is_active = True
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db.session.commit()
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return redirect(url_for('main.banner'))
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@main.route('/admin/banner/hide', methods=['POST'])
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@flask_login.login_required
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def hide_active_banner():
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banner = get_active_banner()
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if banner:
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banner.is_active = False
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db.session.commit()
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return redirect(url_for('main.banner'))
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@main.route('/admin/confused')
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@flask_login.login_required
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def confused_notifications():
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return render_template("confused.html")
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