move qr helpers to utils.py, implement user hash login

app/auth/routes.py

@@ -1,9 +1,10 @@
 from datetime import datetime
-from flask import render_template, flash, redirect, url_for, abort
+from flask import render_template, flash, redirect, request, url_for, abort, Markup, escape
 from flask_login import login_user, logout_user, current_user, login_required
 
 from app import db
 from app.auth import bp
+from app.utils import generate_qr_code, serve_pil_image
 from app.models import User
 from app.auth.forms import LoginForm, RegistrationForm
 
@@ -17,11 +18,14 @@ def login():
         if user is None or not user.check_password(form.password.data):
             flash('Invalid username or password')
             return redirect(url_for('auth.login'))
-        login_user(user, remember=form.remember_me.data)
-        user.last_login = datetime.utcnow()
-        return redirect(url_for('main.index'))
+        return user_login(user, form.remember_me.data)
     return render_template('auth/login.html', title='Sign In', form=form)
 
+def user_login(user, remember):
+    login_user(user, remember)
+    user.last_login = datetime.utcnow()
+    return redirect(url_for('main.index'))
+
 @bp.route('/logout')
 @login_required
 def logout():
@@ -58,3 +62,35 @@ def generate_auth_hash(username):
     user.set_auth_hash()
     db.session.commit()
     return 'nothing'
+
+@bp.route('/user/<auth_hash>')
+def user_hash_login(auth_hash):
+    user = User.query.filter_by(auth_hash=auth_hash).first_or_404()
+    if current_user.is_authenticated:
+        if current_user.owns_game_played_by(user):
+            safe_username = escape(user.name)
+            flash(Markup(f"The <a href='{request.url}'>login link</a> for {safe_username} works! "
+                          "However, logged in users like you can't access it"))
+            return redirect(url_for('main.game_player', game_name=current_user.owned_game_played_by(user).name, username=user.name))
+        flash(f'You are aleady logged in as {current_user.name}!')
+        return redirect(url_for('main.index'))
+    if user.password_hash:
+        flash('Please login with your username and password!')
+        abort(404)
+    if user.last_login:
+        return user_login(user, True)
+    if request.args.get('login', default='false', type=str).lower() == 'true':
+        return user_login(user, True)
+    return render_template('auth/user_hash_login.html', title=f'User: {user.name}', user=user)
+
+@bp.route('/user/<auth_hash>/qrcode.png')
+@login_required
+def user_qrcode(auth_hash):
+    user = User.query.filter_by(auth_hash=auth_hash).first_or_404()
+    if not current_user.owns_game_played_by(user):
+        abort(403)
+    if user.last_login:
+        flash('After a player has logged in, it is no longer possible to request their QR code.')
+        abort(403)
+    img = generate_qr_code(url_for('auth.user_hash_login', auth_hash=auth_hash, _external=True))
+    return serve_pil_image(img)

app/main/routes.py

@@ -3,8 +3,7 @@ import json
 from os import listdir
 from pathlib import Path
 from datetime import datetime
-from io import BytesIO
-import qrcode
+
 from flask import render_template, flash, redirect, url_for, request, abort, send_file, current_app, send_from_directory
 from flask_login import current_user, login_required
 from werkzeug.utils import secure_filename
@@ -13,12 +12,10 @@ from sqlalchemy import and_
 
 from app import db
 from app.main import bp
+from app.utils import generate_qr_code, serve_pil_image
 from app.models import User, Game, Role, GamePlayer, Objective, ObjectiveMinimalEncoder, LocationEncoder, PlayerCaughtPlayer
 from app.main.forms import CreateGameForm, ObjectiveForm, PlayerAddForm, UserCreateForm, PlayerUpdateForm, CatchBunnyForm
 
-
-import os
-
 @bp.before_app_request
 def before_request():
     if current_user.is_authenticated:
@@ -36,7 +33,6 @@ def index():
 @bp.route('/create_game', methods=['GET', 'POST'])
 @login_required
 def create_game():
-    print(current_user.is_authenticated)
     form = CreateGameForm()
     if form.validate_on_submit():
         game = Game(name=form.game_name.data, start_time=form.start_time.data, end_time=form.end_time.data)
@@ -211,34 +207,13 @@ def game_player(game_name, username):
     form.role.choices = [(role.value, role.name) for role in Role]
     form.role.default = player.role.value
     form.process()
-    
+
     if form.validate_on_submit():
         player.role = Role[form.role.data]
         db.session.commit()
         return redirect(url_for('main.game_dashboard', game_name=game.name))
     return render_template('game_player.html', title=f'{user.name} in {game_name}', player=player, form=form, json=json, location_encoder=LocationEncoder)
 
-@bp.route('/user/<auth_hash>/qrcode.png')
-@login_required
-def user_qrcode(auth_hash):
-    user = User.query.filter_by(auth_hash=auth_hash).first_or_404()
-    if not current_user.owns_game_played_by(user):
-        abort(403)
-    if user.last_login:
-        flash('After a player has logged in, it is no longer possible to request their QR code.')
-        abort(403)
-    img = generate_qr_code(url_for('main.user', auth_hash=auth_hash, _external=True))
-    return serve_pil_image(img)
-
-@bp.route('/user/<auth_hash>')
-@login_required
-def user(auth_hash):
-    user = User.query.filter_by(auth_hash=auth_hash).first_or_404()
-    if user.password_hash:
-        flash('Please login with your username and password!')
-        abort(404)
-    return render_template('auth/user.html', title=f'User: {user.name}', user=user)
-
 @bp.route('/game/<game_name>/add_objective', methods=['GET', 'POST'])
 @login_required
 def add_objective(game_name):
@@ -267,24 +242,6 @@ def delete_objective(objective_hash):
         db.session.commit()
     return redirect(url_for('main.game_dashboard', game_name=objective.game.name))
 
-def generate_qr_code(url):
-    qr = qrcode.QRCode(
-        version=None,
-        error_correction=qrcode.constants.ERROR_CORRECT_M,
-        box_size=30,
-        border=4,
-    )
-    qr.add_data(url)
-    qr.make(fit=True)
-    return qr.make_image(fill_color='black', back_color='white')
-
-# Source: https://stackoverflow.com/questions/7877282/how-to-send-image-generated-by-pil-to-browser
-def serve_pil_image(pil_img):
-    img_io = BytesIO()
-    pil_img.save(img_io, 'PNG', quality=70)
-    img_io.seek(0)
-    return send_file(img_io, mimetype='image/png')
-
 @bp.route('/objective/<objective_hash>/qrcode.png')
 @login_required
 def objective_qrcode(objective_hash):

app/models/user.py

@@ -67,12 +67,20 @@ class User(UserMixin, db.Model):
             return None
         return gameplayer.role
 
-    def owns_game_played_by(self, player):
-        '''Self is an owner of a game the player participates in'''
+    def owns_game_played_by(self, user):
+        '''Self is an owner of a game the user participates in'''
         return self in [gameplayer.user for gameplayers in
-                        [game.players for game in player.games]
+                        [game.players for game in user.games]
                         for gameplayer in gameplayers if gameplayer.role == Role.owner]
 
+    def owned_game_played_by(self, user):
+        '''Return first game owned by self that the user participates in'''
+        return next(iter([gameplayer.game for gameplayers in
+                          [game.players for game in user.games]
+                          for gameplayer in gameplayers
+                          if gameplayer.role == Role.owner and gameplayer.user == self]),
+                    None)
+
     def player_in(self, game):
          # pylint: disable=not-an-iterable
         '''Returns GamePlayer object for given game, or None if user does not participate in given game'''

app/templates/auth/user.html

@@ -1,7 +0,0 @@
-{% extends "base.html" %}
-{% import 'bootstrap/wtf.html' as wtf %}
-
-{% block app_content %}
-    <h1>User</h1>
-    This page is is progress, it should enable you to claim a player account using the authhash, as long as the player hasnt logged in yet.
-{% endblock %}

app/templates/auth/user_hash_login.html

@@ -0,0 +1,14 @@
+{% extends "base.html" %}
+{% import 'bootstrap/wtf.html' as wtf %}
+
+{% block app_content %}
+    <h1>Welcome, {{ user.name }}!</h1>
+    <p>
+        If you found this page, it probably means someone who is organising a hunt invited you by
+        sending a link or QR-code to this page. You can start playing right away, if and if you get
+        logged out just visit this page again. However, if you want to be sure other people can't
+        steal this account, please set a password.
+    </p>
+    <a href="{{ url_for('main.index') }}"><button class="btn btn-primary">Set Password</button></a>
+    <a href="{{ url_for('auth.user_hash_login', auth_hash=user.auth_hash, login='true') }}"><button class="btn btn-primary">Start Playing!</button></a>
+{% endblock %}

app/templates/game_player.html

@@ -18,7 +18,9 @@
 
         {% if player.user.auth_hash and not player.user.last_login %}
         <div class="row">
-            <img src="{{ url_for('main.user_qrcode', auth_hash=player.user.auth_hash) }}" alt="qr_code_failed" , width="80%">
+            <a href="{{ url_for('auth.user_hash_login', auth_hash=player.user.auth_hash) }}">
+                <img src="{{ url_for('auth.user_qrcode', auth_hash=player.user.auth_hash) }}" alt="qr_code_failed" width="80%" title="login code for {{ player.user.name }}">
+            </a>     
         </div>
         {% elif not player.user.last_login %}
         <br>

app/utils.py

@@ -0,0 +1,21 @@
+from io import BytesIO
+import qrcode
+from flask import send_file
+
+def generate_qr_code(url):
+    qr = qrcode.QRCode(
+        version=None,
+        error_correction=qrcode.constants.ERROR_CORRECT_M,
+        box_size=30,
+        border=4,
+    )
+    qr.add_data(url)
+    qr.make(fit=True)
+    return qr.make_image(fill_color='black', back_color='white')
+
+def serve_pil_image(pil_img):
+    # Source: https://stackoverflow.com/questions/7877282/how-to-send-image-generated-by-pil-to-browser
+    img_io = BytesIO()
+    pil_img.save(img_io, 'PNG', quality=70)
+    img_io.seek(0)
+    return send_file(img_io, mimetype='image/png')