app.py

# app.py
import streamlit as st
import sqlite3
from passlib.hash import pbkdf2_sha256
from flask import Flask, jsonify, request
import uuid
import threading

# Initialize Flask app
flask_app = Flask(__name__)
flask_app.secret_key = str(uuid.uuid4())

# Database setup
def init_db():
    conn = sqlite3.connect('conntribe.db')
    c = conn.cursor()
    
    # Create users table
    c.execute('''CREATE TABLE IF NOT EXISTS users
                 (id INTEGER PRIMARY KEY AUTOINCREMENT,
                  name TEXT NOT NULL,
                  email TEXT UNIQUE NOT NULL,
                  whatsapp TEXT UNIQUE NOT NULL,
                  sem INTEGER NOT NULL,
                  password TEXT NOT NULL)''')
    
    # Create projects table
    c.execute('''CREATE TABLE IF NOT EXISTS projects
                 (id INTEGER PRIMARY KEY AUTOINCREMENT,
                  title TEXT NOT NULL,
                  description TEXT,
                  members_needed INTEGER NOT NULL,
                  whatsapp TEXT NOT NULL,
                  user_id INTEGER NOT NULL,
                  FOREIGN KEY(user_id) REFERENCES users(id))''')
    conn.commit()
    conn.close()

init_db()

# Flask API Endpoints
@flask_app.route('/api/signup', methods=['POST'])
def signup():
    data = request.json
    try:
        conn = sqlite3.connect('conntribe.db')
        c = conn.cursor()
        hashed_password = pbkdf2_sha256.hash(data['password'])
        c.execute('INSERT INTO users (name, email, whatsapp, sem, password) VALUES (?, ?, ?, ?, ?)',
                  (data['name'], data['email'], data['whatsapp'], data['sem'], hashed_password))
        conn.commit()
        return jsonify({'message': 'User created successfully'}), 201
    except sqlite3.IntegrityError:
        return jsonify({'error': 'Email or WhatsApp number already exists'}), 400
    finally:
        conn.close()

@flask_app.route('/api/login', methods=['POST'])
def login():
    data = request.json
    conn = sqlite3.connect('conntribe.db')
    c = conn.cursor()
    c.execute('SELECT * FROM users WHERE email = ? OR whatsapp = ?', (data['username'], data['username']))
    user = c.fetchone()
    conn.close()
    
    if user and pbkdf2_sha256.verify(data['password'], user[5]):
        return jsonify({
            'id': user[0],
            'name': user[1],
            'email': user[2],
            'whatsapp': user[3]
        }), 200
    return jsonify({'error': 'Invalid credentials'}), 401

@flask_app.route('/api/projects', methods=['GET', 'POST'])
def projects():
    if request.method == 'GET':
        conn = sqlite3.connect('conntribe.db')
        c = conn.cursor()
        c.execute('SELECT projects.*, users.name FROM projects JOIN users ON projects.user_id = users.id')
        projects = c.fetchall()
        conn.close()
        return jsonify([{
            'id': p[0],
            'title': p[1],
            'description': p[2],
            'members_needed': p[3],
            'whatsapp': p[4],
            'author': p[6]
        } for p in projects]), 200
    
    elif request.method == 'POST':
        data = request.json
        try:
            conn = sqlite3.connect('conntribe.db')
            c = conn.cursor()
            c.execute('INSERT INTO projects (title, description, members_needed, whatsapp, user_id) VALUES (?, ?, ?, ?, ?)',
                      (data['title'], data.get('description'), data['members_needed'], data['whatsapp'], data['user_id']))
            conn.commit()
            return jsonify({'message': 'Project created successfully'}), 201
        finally:
            conn.close()

# Streamlit UI
def main():
    st.set_page_config(page_title="ConnTribe", page_icon="🤝", layout="wide")
    
    if 'user' not in st.session_state:
        st.session_state.user = None
    
    # Navigation
    if st.session_state.user:
        tabs = st.sidebar.radio("Navigation", ["Home", "Projects"])
    else:
        tabs = st.sidebar.radio("Navigation", ["Login", "Sign Up"])
    
    # Authentication Pages
    if not st.session_state.user:
        if tabs == "Login":
            with st.form("Login"):
                st.header("Login to ConnTribe")
                username = st.text_input("Email/WhatsApp Number")
                password = st.text_input("Password", type="password")
                
                if st.form_submit_button("Login"):
                    response = requests.post('http://localhost:5000/api/login', 
                                           json={'username': username, 'password': password})
                    if response.status_code == 200:
                        st.session_state.user = response.json()
                        st.experimental_rerun()
                    else:
                        st.error("Invalid credentials")
        
        elif tabs == "Sign Up":
            with st.form("Sign Up"):
                st.header("Create New Account")
                name = st.text_input("Full Name")
                email = st.text_input("Email")
                whatsapp = st.text_input("WhatsApp Number")
                sem = st.number_input("Current Semester", min_value=1, max_value=8)
                password = st.text_input("Password", type="password")
                confirm_password = st.text_input("Confirm Password", type="password")
                
                if st.form_submit_button("Sign Up"):
                    if password != confirm_password:
                        st.error("Passwords do not match")
                    else:
                        response = requests.post('http://localhost:5000/api/signup', 
                                                json={'name': name, 'email': email, 
                                                      'whatsapp': whatsapp, 'sem': sem, 
                                                      'password': password})
                        if response.status_code == 201:
                            st.success("Account created successfully! Please login.")
                        else:
                            st.error(response.json().get('error', 'Registration failed'))
    
    # Authenticated Pages
    else:
        st.sidebar.header(f"Welcome, {st.session_state.user['name']}")
        if st.sidebar.button("Logout"):
            st.session_state.user = None
            st.experimental_rerun()
        
        if tabs == "Home":
            st.header("Welcome to ConnTribe 👋")
            st.markdown("""
            ### Your Project Collaboration Hub
            **ConnTribe** helps you connect with fellow students to collaborate on projects. Here's how to use it:
            1. **Create a Project**: Share your project details and required team members
            2. **Browse Projects**: Explore existing projects looking for collaborators
            3. **Join Projects**: Connect with project owners directly via WhatsApp
            
            Start collaborating today and build amazing things together! 🚀
            """)
        
        elif tabs == "Projects":
            st.header("Project Marketplace")
            
            # Create Project
            with st.expander("Create New Project"):
                with st.form("New Project"):
                    title = st.text_input("Project Title*")
                    description = st.text_area("Description")
                    members_needed = st.number_input("Members Needed*", min_value=1)
                    whatsapp = st.text_input("Contact WhatsApp*", value=st.session_state.user['whatsapp'])
                    
                    if st.form_submit_button("Post Project"):
                        if title and members_needed and whatsapp:
                            response = requests.post('http://localhost:5000/api/projects', 
                                                   json={'title': title, 'description': description,
                                                         'members_needed': members_needed, 
                                                         'whatsapp': whatsapp,
                                                         'user_id': st.session_state.user['id']})
                            if response.status_code == 201:
                                st.success("Project posted successfully!")
                            else:
                                st.error("Failed to post project")
            
            # Display Projects
            st.subheader("Available Projects")
            response = requests.get('http://localhost:5000/api/projects')
            if response.status_code == 200:
                projects = response.json()
                for project in projects:
                    with st.container():
                        st.markdown(f"""
                        ### {project['title']}
                        **By**: {project['author']}  
                        **Members Needed**: {project['members_needed']}  
                        **Description**: {project['description'] or 'No description provided'}
                        """)
                        if st.button(f"Join {project['title']}", key=project['id']):
                            st.markdown(f"[Contact on WhatsApp](https://wa.me/{project['whatsapp']})")
                        st.markdown("---")
            else:
                st.warning("No projects available yet. Be the first to post one!")

# Run Flask in background
def run_flask():
    flask_app.run(host='0.0.0.0', port=5000, threaded=True)

if __name__ == "__main__":
    threading.Thread(target=run_flask, daemon=True).start()
    main()