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Dockerfile

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+# Use an official Python runtime as a parent image
+FROM python:3.9-slim
+
+# Set the working directory in the container
+WORKDIR /app
+
+# Copy the requirements file into the container
+COPY requirements.txt .
+
+# Install any needed packages specified in requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of the application code
+COPY . .
+
+# Make port 5000 available to the world outside this container
+EXPOSE 5000
+
+# Define environment variable
+ENV FLASK_APP=app.py
+
+# Run the Flask app
+CMD ["flask", "run", "--host=0.0.0.0"]

README.md

@@ -1,10 +1 @@
----
-title: Chat
-emoji: 🌍
-colorFrom: pink
-colorTo: blue
-sdk: docker
-pinned: false
----
-
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# Chat-app

app.py

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+from flask import Flask, render_template, request, redirect, url_for, session
+from flask_socketio import SocketIO, send, emit
+import os
+import re
+from nltk.tokenize import word_tokenize
+from nltk.corpus import stopwords
+import nltk
+
+# Download NLTK data (only required once)
+nltk.download('punkt')
+nltk.download('stopwords')
+
+app = Flask(__name__)
+app.secret_key = 'your_secret_key_here'  # Required for session management
+socketio = SocketIO(app)
+
+# Path to the text file where messages will be stored
+MESSAGE_FILE = 'chat_messages.txt'
+
+# Ensure the message file exists
+if not os.path.exists(MESSAGE_FILE):
+    with open(MESSAGE_FILE, 'w') as f:
+        f.write('')
+
+# Predefined users (username: password)
+USERS = {
+    'ali': '1234',
+    'zain': '1234',
+    'fahad': '1234'
+}
+
+@app.route('/', methods=['GET'])
+def home():
+    # Redirect to login if the user is not logged in
+    if 'username' not in session:
+        return redirect(url_for('login'))
+    return redirect(url_for('chat'))
+
+@app.route('/login', methods=['GET', 'POST'])
+def login():
+    if request.method == 'POST':
+        username = request.form['username']
+        password = request.form['password']
+
+        # Check if the username exists and the password matches
+        if username in USERS and USERS[username] == password:
+            session['username'] = username  # Store username in session
+            return redirect(url_for('chat'))
+        else:
+            return "Invalid username or password. <a href='/login'>Try again</a>"
+
+    return render_template('login.html')
+
+@app.route('/chat', methods=['GET'])
+def chat():
+    # Redirect to login if the user is not logged in
+    if 'username' not in session:
+        return redirect(url_for('login'))
+
+    # Read all messages from the file
+    with open(MESSAGE_FILE, 'r') as f:
+        messages = f.readlines()
+
+    return render_template('chat.html', messages=messages)
+
+@app.route('/logout')
+def logout():
+    session.pop('username', None)  # Remove username from session
+    return redirect(url_for('login'))
+
+@app.route('/matchmaking')
+def matchmaking():
+    # Redirect to login if the user is not logged in
+    if 'username' not in session:
+        return redirect(url_for('login'))
+
+    # Perform matchmaking
+    matches = check_for_matches()  # Use the correct function name
+    return render_template('matchmaking.html', matches=matches)
+
+# WebSocket event for receiving and broadcasting messages
+@socketio.on('message')
+def handle_message(data):
+    username = session.get('username')
+    message = data['message']
+
+    # Save the message to the file
+    with open(MESSAGE_FILE, 'a') as f:
+        f.write(f'{username}: {message}\n')
+
+    # Broadcast the message to all connected clients
+    emit('message', {'username': username, 'message': message}, broadcast=True)
+
+    # Check for matches after every new message
+    check_for_matches()
+
+def check_for_matches():
+    # Read all messages from the file
+    with open(MESSAGE_FILE, 'r') as f:
+        messages = f.readlines()
+
+    # Initialize lists to store buy and sell requests
+    buy_requests = []
+    sell_requests = []
+
+    # Process each message
+    for message in messages:
+        username, text = message.split(':', 1)
+        text = text.strip().lower()
+
+        # Tokenize the message and remove stopwords
+        tokens = word_tokenize(text)
+        tokens = [word for word in tokens if word.isalnum() and word not in stopwords.words('english')]
+
+        # Check if the message contains "buy" or "sell"
+        if 'buy' in tokens:
+            product = extract_product_name(tokens)
+            if product:
+                buy_requests.append({'username': username.strip(), 'product': product})
+        elif 'sell' in tokens:
+            product = extract_product_name(tokens)
+            if product:
+                sell_requests.append({'username': username.strip(), 'product': product})
+
+    # Find matches between buy and sell requests
+    matches = []
+    for buy in buy_requests:
+        for sell in sell_requests:
+            if buy['product'] == sell['product']:
+                matches.append({
+                    'buyer': buy['username'],
+                    'seller': sell['username'],
+                    'product': buy['product']
+                })
+                # Remove matched messages from the file
+                remove_matched_messages(buy['username'], sell['username'], buy['product'])
+
+    # Broadcast matches to all clients
+    if matches:
+        for match in matches:
+            emit('match_found', {
+                'buyer': match['buyer'],
+                'seller': match['seller'],
+                'product': match['product']
+            }, broadcast=True)
+
+def extract_product_name(tokens):
+    # Extract the product name (assume it's the word after "buy" or "sell")
+    for i, word in enumerate(tokens):
+        if word in ['buy', 'sell'] and i + 1 < len(tokens):
+            return tokens[i + 1]
+    return None
+
+def remove_matched_messages(buyer, seller, product):
+    # Read all messages from the file
+    with open(MESSAGE_FILE, 'r') as f:
+        messages = f.readlines()
+
+    # Filter out matched messages
+    new_messages = []
+    for message in messages:
+        username, text = message.split(':', 1)
+        text = text.strip().lower()
+        if not (username.strip() == buyer and f'buy {product}' in text) and \
+           not (username.strip() == seller and f'sell {product}' in text):
+            new_messages.append(message)
+
+    # Write the updated messages back to the file
+    with open(MESSAGE_FILE, 'w') as f:
+        f.writelines(new_messages)
+
+if __name__ == '__main__':
+    socketio.run(app, debug=True, host='0.0.0.0')

chat_messages.txt

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+zain: hi
+ali: hi
+ali: hi
+ali: hu
+zain: hello
+ali: have dld
+ali: hi
+ali: hello
+zain: hi
+zain: yes

templates/chat.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Chat Room</title>
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/4.0.1/socket.io.js"></script>
+    <style>
+        body {
+            font-family: Arial, sans-serif;
+            background-color: #f5f5f5;
+            margin: 0;
+            padding: 0;
+            display: flex;
+            flex-direction: column;
+            height: 100vh;
+        }
+        #chat {
+            flex: 1;
+            overflow-y: scroll;
+            padding: 10px;
+            background-color: #fff;
+            border-bottom: 1px solid #ddd;
+        }
+        .message {
+            margin-bottom: 10px;
+            padding: 10px;
+            border-radius: 10px;
+            background-color: #e1f5fe;
+            max-width: 70%;
+            word-wrap: break-word;
+        }
+        .message.user {
+            background-color: #d1c4e9;
+            margin-left: auto;
+        }
+        .message.deleted {
+            background-color: #ffebee;
+            color: #757575;
+            font-style: italic;
+        }
+        .user-info {
+            font-weight: bold;
+            color: #333;
+        }
+        .timestamp {
+            font-size: 0.8em;
+            color: #757575;
+            margin-top: 5px;
+        }
+        #input-area {
+            display: flex;
+            padding: 10px;
+            background-color: #fff;
+            border-top: 1px solid #ddd;
+        }
+        #message {
+            flex: 1;
+            padding: 10px;
+            border: 1px solid #ddd;
+            border-radius: 5px;
+            margin-right: 10px;
+        }
+        #send-button {
+            padding: 10px 20px;
+            background-color: #007bff;
+            color: #fff;
+            border: none;
+            border-radius: 5px;
+            cursor: pointer;
+        }
+    </style>
+</head>
+<body>
+    <h1>Chat Room</h1>
+    <p>Logged in as: <strong>{{ session.username }}</strong> | <a href="{{ url_for('logout') }}">Logout</a> | <a href="{{ url_for('matchmaking') }}">Matchmaking</a></p>
+    <div id="chat">
+        {% for message in messages %}
+            <div class="message {% if message.split(':')[0].strip() == session.username %}user{% endif %}">
+                <div class="user-info">{{ message.split(':')[0] }}</div>
+                <div class="text">{{ message.split(':')[1] }}</div>
+                <div class="timestamp">6:32 am</div>
+            </div>
+        {% endfor %}
+        <!-- <div class="message deleted">
+            <div class="text">This message was deleted.</div>
+            <div class="timestamp">6:32 am</div>
+        </div> -->
+    </div>
+    <div id="input-area">
+        <input type="text" id="message" placeholder="Type a message..." required>
+        <button id="send-button">Send</button>
+    </div>
+
+    <script>
+        // Connect to the WebSocket server
+        const socket = io();
+
+        // Handle incoming messages
+        socket.on('message', function(data) {
+            const chat = document.getElementById('chat');
+            const messageElement = document.createElement('div');
+            messageElement.className = `message ${data.username === '{{ session.username }}' ? 'user' : ''}`;
+            messageElement.innerHTML = `
+                <div class="user-info">${data.username}</div>
+                <div class="text">${data.message}</div>
+                <div class="timestamp">${new Date().toLocaleTimeString()}</div>
+            `;
+            chat.appendChild(messageElement);
+            chat.scrollTop = chat.scrollHeight; // Auto-scroll to the bottom
+        });
+
+        // Handle match notifications
+        socket.on('match_found', function(data) {
+            const chat = document.getElementById('chat');
+            const matchElement = document.createElement('div');
+            matchElement.className = 'match-notification';
+            matchElement.innerHTML = `Match found: <strong>${data.buyer}</strong> wants to buy <strong>${data.product}</strong>, and <strong>${data.seller}</strong> wants to sell <strong>${data.product}</strong>.`;
+            chat.appendChild(matchElement);
+            chat.scrollTop = chat.scrollHeight; // Auto-scroll to the bottom
+        });
+
+        // Function to send a message
+        function sendMessage() {
+            const messageInput = document.getElementById('message');
+            const message = messageInput.value.trim();
+            if (message) {
+                socket.send({ message: message }); // Send message to the server
+                messageInput.value = ''; // Clear the input field
+            }
+        }
+
+        // Send message when the send button is clicked
+        document.getElementById('send-button').addEventListener('click', function(e) {
+            e.preventDefault();
+            sendMessage();
+        });
+
+        // Send message when the Enter key is pressed
+        document.getElementById('message').addEventListener('keypress', function(e) {
+            if (e.key === 'Enter') {
+                e.preventDefault();
+                sendMessage();
+            }
+        });
+    </script>
+</body>
+</html>

templates/login.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Login</title>
+</head>
+<body>
+    <h1>Login</h1>
+    <form method="POST">
+        <label for="username">Username:</label>
+        <input type="text" id="username" name="username" required>
+        <br>
+        <label for="password">Password:</label>
+        <input type="password" id="password" name="password" required>
+        <br>
+        <button type="submit">Login</button>
+    </form>
+</body>
+</html>

templates/matchmaking.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Matchmaking</title>
+</head>
+<body>
+    <h1>Matchmaking Results</h1>
+    <a href="{{ url_for('chat') }}">Back to Chat</a>
+    <div id="matches">
+        {% if matches %}
+            {% for match in matches %}
+                <p>
+                    <strong>{{ match.buyer }}</strong> wants to buy <strong>{{ match.product }}</strong>.
+                    <strong>{{ match.seller }}</strong> wants to sell <strong>{{ match.product }}</strong>.
+                    Contact them for matchmaking!
+                </p>
+            {% endfor %}
+        {% else %}
+            <p>No matches found.</p>
+        {% endif %}
+    </div>
+</body>
+</html>