Create app.py

app.py

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+import uuid
+time
+from flask import Flask, render_template, request, redirect, url_for, session
+from flask_socketio import SocketIO, join_room, leave_room, emit
+
+app = Flask(__name__)
+app.secret_key = 'replace-with-secure-key'
+socketio = SocketIO(app, cors_allowed_origins='*')
+
+# In-memory storage (reset when container restarts)
+PEOPLE = {}       # sid -> {id, gender, age, interests:list}
+WAITING = []      # list of sids waiting for match
+ROOMS = {}        # room_id -> (sid1, sid2)
+
+@app.route('/', methods=['GET', 'POST'])
+def index():
+    if request.method == 'POST':
+        # Create profile
+        profile = {
+            'id': request.form['id'],
+            'gender': request.form['gender'],
+            'age': request.form['age'],
+            'interests': request.form.getlist('interests')
+        }
+        session['profile'] = profile
+        return render_template('index.html', waiting=True)
+    return render_template('index.html', waiting=False)
+
+@socketio.on('connect')
+def on_connect():
+    # assign user sid
+    if 'profile' not in session:
+        return False
+    sid = request.sid
+    PEOPLE[sid] = session['profile']
+    WAITING.append(sid)
+    emit('status', {'msg': 'Finding partner...'}, room=sid)
+    try_match()
+
+@socketio.on('disconnect')
+def on_disconnect():
+    sid = request.sid
+    # remove from waiting
+    if sid in WAITING:
+        WAITING.remove(sid)
+    # remove from PEOPLE
+    PEOPLE.pop(sid, None)
+    # tear down any room
+    for room, pair in list(ROOMS.items()):
+        if sid in pair:
+            other = pair[1] if pair[0]==sid else pair[0]
+            emit('status', {'msg': 'Partner left.'}, room=other)
+            leave_room(room)
+            ROOMS.pop(room)
+
+@socketio.on('chat')
+def on_chat(data):
+    room = data['room']
+    text = data['msg']
+    emit('chat', {'msg': text}, room=room)
+
+@socketio.on('leave')
+def on_leave(data):
+    room = data['room']
+    sid = request.sid
+    # confirm leave
+    emit('left', {}, room=sid)
+    # notify partner
+    other = [s for s in ROOMS[room] if s != sid][0]
+    emit('status', {'msg': 'Partner left.'}, room=other)
+    leave_room(room)
+    ROOMS.pop(room, None)
+
+def try_match():
+    # match waiting users
+    while len(WAITING) >= 2:
+        s1 = WAITING.pop(0)
+        # find interest match
+        prefs1 = set(PEOPLE[s1]['interests'])
+        # scan for s2
+        idx = 0; found = None
+        for i, s2 in enumerate(WAITING):
+            if prefs1 & set(PEOPLE[s2]['interests']):
+                found = i; break
+        if found is None:
+            # no common interest: pick random
+            idx = 0; s2 = WAITING.pop(0)
+        else:
+            idx = found; s2 = WAITING.pop(found)
+        room = str(uuid.uuid4())
+        ROOMS[room] = (s1, s2)
+        join_room(room, sid=s1)
+        join_room(room, sid=s2)
+        # notify both
+        emit('matched', {'room': room}, room=s1)
+        emit('matched', {'room': room}, room=s2)
+
+if __name__ == '__main__':
+    socketio.run(app, host='0.0.0.0', port=7860)