finished dev version

app/models.py

@@ -5,8 +5,10 @@ class Participant(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column(db.String(100), nullable=False)
     email = db.Column(db.String(120), unique=True, nullable=False)
+    num_emails_sent = db.Column(db.Integer, default=0)
     looking_for_team = db.Column(db.Boolean, default=False)
     confirmed = db.Column(db.Boolean, default=False)
+    on_waitlist = db.Column(db.Boolean, default=False)
     discord_token = db.Column(db.String(16), unique=True)
     discord_user_id = db.Column(db.String(50))
 

app/routes.py

@@ -9,14 +9,31 @@ bp = Blueprint('main', __name__)
 def get_confirmed_count():
     return Participant.query.filter_by(confirmed=True).count()
 
-def send_verification_email(user_email):
+def add_user(name, email, looking_for_team, on_waitlist = False):
+    new_user = Participant(name=name, email=email, looking_for_team=looking_for_team)
+    if on_waitlist:
+        new_user.on_waitlist = on_waitlist
+    db.session.add(new_user)
+    db.session.commit()
+    return new_user
+
+def send_verification_email(user):
     s = URLSafeTimedSerializer(current_app.config['SECRET_KEY'])
-    token = s.dumps(user_email, salt='email-confirm-h4tum-ctf-2025')
+    token = s.dumps(user.email, salt='email-confirm-h4tum-ctf-2025')
     link = url_for('main.verify_email', token=token, _external=True)
     logo = url_for('static', filename='h4tum_white.png', _external=True)
     
-    msg = Message('Verify your CTF Registration', recipients=[user_email])
+    msg = Message('Verify your CTF Registration', recipients=[user.email])
-    msg.html = render_template("email.html", user_email=user_email, link=link, logo_url=logo)
+    msg.html = render_template("email.html", user_name=user.name, link=link, logo_url=logo)
+    mail.send(msg)
+    user.num_emails_sent += 1
+    db.session.commit()
+    return True
+
+def send_waitlist_email(user):
+    msg = Message('h4tum CTF 2026 Registration', recipients=[user.email])
+    logo = url_for('static', filename='h4tum_white.png', _external=True)
+    msg.html = render_template("waitlist_email.html", logo_url=logo, user_name=user.name)
     mail.send(msg)
 
 @bp.route('/', methods=['GET', 'POST'])
@@ -35,28 +52,34 @@ def index():
             flash(f"Error: You must use a @{tum_domain} email address.", "error")
             return redirect(url_for('main.index'))
 
-        if confirmed_count >= max_spots:
-            flash("Sorry, the event is full!", "error")
-            return redirect(url_for('main.index'))
-
         existing_user = Participant.query.filter_by(email=email).first()
+
         if existing_user:
             if existing_user.confirmed:
                 flash("You are already registered and confirmed!", "info")
+            elif existing_user.on_waitlist:
+                flash("You are already on the waitlist", "info")
             else:
-                flash("Confirmation email resent. Please check your inbox.", "info")
+                if existing_user.num_emails_sent < 5:
-                send_verification_email(email)
+                    flash("Confirmation email resent. Please check your inbox.", "info")
+                    send_verification_email(existing_user)
+                else:
+                    flash("Email limit reached", "error")
+            return redirect(url_for('main.index'))
+        else:
+            new_user = add_user(name, email, looking_for_team) 
+
+            if confirmed_count < max_spots:
+                send_verification_email(new_user)
+                flash("Registration started! Check your email to confirm your spot.", "success")
+            else:
+                new_user.on_waitlist = True
+                db.session.commit()
+                send_waitlist_email(new_user)
+                flash("The event is already full!\nYou have been placed on the waitlist", "info")
             return redirect(url_for('main.index'))
 
-        new_user = Participant(name=name, email=email, looking_for_team=looking_for_team)
+    return render_template('index.html', spots_left=spots_left, max_spots=max_spots)
-        db.session.add(new_user)
-        db.session.commit()
-
-        send_verification_email(email)
-        flash("Registration started! Check your email to confirm your spot.", "success")
-        return redirect(url_for('main.index'))
-
-    return render_template('index.html', spots_left=spots_left)
 
 @bp.route('/verify/<token>')
 def verify_email(token):

app/static/style.css

@@ -45,6 +45,10 @@ footer {
     margin: 0;
 }
 
+.status {
+    text-align: center;
+}
+
 
 h1 { font-size: 1.5rem; word-wrap: break-word; }
 

app/templates/email.html

@@ -20,7 +20,7 @@
                     <tr>
                         <td align="center" style="padding-bottom: 30px; font-size: 16px; line-height: 1.5; text-align: center;">
                             Thanks for registering <br>
-                            <strong style="color: #00ff00;">{{ user_email }}</strong><br><br>
+                            <strong style="color: #00ff00;">{{ user_name }}</strong><br><br>
                             To secure your spot at the event, please confirm your attendance by clicking the button below.
                         </td>
                     </tr>

app/templates/index.html

@@ -13,9 +13,9 @@
     <hr style="border-color: #333; margin: 30px 0;"></hr>
     <h1>> Prizes</h1>
     <ul>
-      <li>1st Place: 100€</li>
+      <li>1st Place: 150€</li>
-      <li>2nd Place: 75€</li>
+      <li>2nd Place: 110€</li>
-      <li>3rd Place: 50€</li>
+      <li>3rd Place: 75€</li>
     </ul>
     <hr style="border-color: #333; margin: 30px 0;"></hr>
     <h1>> Format</h1>
@@ -76,26 +76,27 @@
       {% endwith %}
 
       <div class="status">
-          <h2>Spots Remaining: {{ spots_left }} / 84</h2>
+      {% if spots_left > 0 %}
+          <h2>Spots Remaining: {{ spots_left }} / {{max_spots}}</h2>
+      {% else %}
+          <h2>Register for Waitlist</h2>
+          <p>This event is currently full. Join the queue to be notified of openings.</p>
+      {%endif %}
       </div>
 
-      {% if spots_left > 0 %}
+      <form method="POST">
-          <form method="POST">
+          <label>Name</label>
-              <label>Name</label>
+          <input type="text" name="name" required>
-              <input type="text" name="name" required>
 
-              <label>TUM Email</label>
+          <label>TUM Email</label>
-              <input type="email" name="email" placeholder="@tum.de" required>
+          <input type="email" name="email" placeholder="@tum.de" required>
 
-              <label style="display:block; margin: 20px 0; line-height: 1.4;">
+          <label style="display:block; margin: 20px 0; line-height: 1.4;">
-                  <input type="checkbox" name="looking_for_team" style="transform: scale(1.2); margin-right: 10px;">
+              <input type="checkbox" name="looking_for_team" style="transform: scale(1.2); margin-right: 10px;">
-                  I need a team / looking for group
+              I need a team / looking for group
-              </label>
+          </label>
 
-              <button type="submit">INITIALIZE_REGISTRATION</button>
+          <button type="submit">INITIALIZE_REGISTRATION</button>
-          </form>
+      </form>
-      {% else %}
+    </div>
-          <h2 style="color:red">EVENT FULL</h2>
-      {% endif %}
-  </div>
 {% endblock %}

app/templates/rules.html

@@ -15,6 +15,7 @@
       <li>If something feels unintentionally easy, please report it.</li>
       <li>Do not share flags or solutions with other teams. We will not tolerate flag sharing.</li>
       <li>Each team may register only once, and each person may belong to only one team.</li>
+      <li>A team has at maximum four members</li>
       <li>Only TUM Students are permitted to participate in the CTF.</li>
       <li>Attacking personnel, including participants and non-participants, or the competition system itself is forbidden.</li>
       <li>Every participant has to follow the Code of Conduct.</li>

app/templates/waitlist_email.html

@@ -0,0 +1,39 @@
+<html>
+<body style="margin: 0; padding: 0; background-color: #1a1a1a; font-family: 'Courier New', Courier, monospace; color: #ffffff;">
+    <table width="100%" border="0" cellspacing="0" cellpadding="0" style="background-color: #1a1a1a; padding: 20px;">
+        <tr>
+            <td align="center">
+                <table width="100%" border="0" cellspacing="0" cellpadding="0" style="max-width: 600px; background-color: #222222; border: 1px solid #00ff00; padding: 30px;">
+                    
+                    <tr>
+                        <td align="center" style="padding-bottom: 20px;">
+                          <img src="{{ logo_url }}" alt="Club Logo" width="150" style="display: block; border: 0;">
+                        </td>
+                    </tr>
+
+                    <tr>
+                        <td align="center" style="padding-bottom: 20px;">
+                            <h1 style="color: #00ff00; font-size: 24px; margin: 0; text-transform: uppercase; text-align: center;">Registration Received</h1>
+                        </td>
+                    </tr>
+
+                    <tr>
+                        <td align="center" style="padding-bottom: 30px; font-size: 16px; line-height: 1.5; text-align: center;">
+                            Thanks for registering <br>
+                            <strong style="color: #00ff00;">{{ user_name }}</strong><br><br>
+                            At this time, the event has reached maximum capacity. Your name has been placed on a waiting list; we will contact you in the event of any cancellations.
+                        </td>
+                    </tr>
+
+                    <tr>
+                        <td align="center" style="padding-top: 20px; border-top: 1px solid #333333; font-size: 12px; color: #888888; text-align: center;">
+                            If you didn't request this, you can safely ignore this email.
+                        </td>
+                    </tr>
+
+                </table>
+            </td>
+        </tr>
+    </table>
+</body>
+</html>

run.py

@@ -3,4 +3,4 @@ from app import create_app
 app = create_app()
 
 if __name__ == '__main__':
-    app.run(debug=True, host='0.0.0.0')
+    app.run()