import sqlite3

conn = sqlite3.connect(":memory:")
conn.execute("CREATE VIRTUAL TABLE geodata USING rtree(id, minx, maxx, miny, maxy);")

def insert_data(conn, id, minx, maxx, miny, maxy):
    conn.execute("INSERT INTO geodata VALUES (?, ?, ?, ?, ?)", (id, minx, maxx, miny, maxy))

def query_data(conn, minx, maxx, miny, maxy):
    cursor = conn.execute("SELECT id FROM geodata WHERE minx >= ? AND maxx <= ? AND miny >= ? AND maxy <= ?", (minx, maxx, miny, maxy))
    return cursor.fetchall()

insert_data(conn, 1, 0, 2, 0, 2)
insert_data(conn, 2, 1, 3, 1, 3)
insert_data(conn, 3, 2, 4, 2, 4)

results = query_data(conn, 1, 2, 1, 2)
print(results)

from rtree import index

def build_index(points):
    idx = index.Index()
    for i, point in enumerate(points):
        idx.insert(i, (point[0], point[1], point[0], point[1]))
    return idx

def query_index(idx, query_point, radius):
    results = list(idx.intersection((query_point[0]-radius, query_point[1]-radius, 
                                     query_point[0]+radius, query_point[1]+radius)))
    return results

points = [(0,0), (1,1), (2,2), (3,3), (4,4), (5,5)]
idx = build_index(points)
results = query_index(idx, (2,2), 1)
print(results)

class Node:
    def __init__(self, x, y, width, height, points=None):
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.points = points or []
        self.children = []
    
    def divide(self):
        x = self.x
        y = self.y
        w = self.width
        h = self.height
        w_half = w / 2
        h_half = h / 2
        self.children = [Node(x, y, w_half, h_half, self.points),
                        Node(x + w_half, y, w_half, h_half),
                        Node(x, y + h_half, w_half, h_half),
                        Node(x + w_half, y + h_half, w_half, h_half)]
        self.points = []

def insert(self, point):
        if self.children:
            for child in self.children:
                if child.contains(point):
                    child.insert(point)
                    return
        self.points.append(point)
        if len(self.points) > 4:
            self.divide()

def contains(self, point):
        x, y = point
        return self.x <= x < self.x + self.width and self.y <= y < self.y + self.height

class QuadTree:
    def __init__(self, width, height):
        self.root = Node(0, 0, width, height)

def insert(self, point):
        self.root.insert(point)

def query(self, x, y, width, height):
        results = []
        self._query(self.root, x, y, width, height, results)
        return results

def _query(self, node, x, y, width, height, results):
        if not node.children:
            results.extend(node.points)
            return
        for child in node.children:
            if child.x + child.width >= x and child.y + child.height >= y and child.x <= x + width and child.y <= y + height:
                self._query(child, x, y, width, height, results)

tree = QuadTree(100, 100)
points = [(0,0), (1,1), (2,2), (3,3), (4,4), (5,5)]
for point in points:
    tree.insert(point)
results = tree.query(1, 1, 2, 2)
print(results)

# User authentication and authorization service
class UserAuthService:
    def __init__(self):
        self.users = {}

    def signup(self, username, password):
        if username in self.users:
            return "Username already exists"
        self.users[username] = password
        return "Signup successful"

    def login(self, username, password):
        if username not in self.users:
            return "Username does not exist"
        if self.users[username] != password:
            return "Incorrect password"
        return "Login successful"

# Rides management service
class RidesService:
    def __init__(self):
        self.rides = {}

    def request_ride(self, user, location, destination):
        ride_id = len(self.rides) + 1
        self.rides[ride_id] = {
            "user": user,
            "location": location,
            "destination": destination,
            "status": "requested"
        }
        return ride_id

    def accept_ride(self, ride_id, driver):
        if ride_id not in self.rides:
            return "Ride does not exist"
        self.rides[ride_id]["driver"] = driver
        self.rides[ride_id]["status"] = "accepted"
        return "Ride accepted"

    def reject_ride(self, ride_id):
        if ride_id not in self.rides:
            return "Ride does not exist"
        self.rides[ride_id]["status"] = "rejected"
        return "Ride rejected"

    def start_ride(self, ride_id):
        if ride_id not in self.rides:
            return "Ride does not exist"
        if self.rides[ride_id]["status"] != "accepted":
            return "Ride cannot be started"
        self.rides[ride_id]["status"] = "started"
        return "Ride started"

    def end_ride(self, ride_id):
        if ride_id not in self.rides:
            return "Ride does not exist"
        if self.rides[ride_id]["status"] != "started":
            return "Ride cannot be ended"
        self.rides[ride_id]["status"] = "ended"
        return "Ride ended"

# Payment processing service
class PaymentService:
    def __init__(self):
        self.transactions = []

    def calculate_fare(self, ride_id, ride_data):
        # logic to calculate fare based on ride distance, time, etc.
        fare = 10.0 # example fare
        return fare

    def charge_fare(self, ride_id, fare):
        transaction = {
            "ride_id": ride_id,
            "fare": fare
        }
        self.transactions.append(transaction)
        return "Fare charged"

import folium

def map_location(lat, long, name):
    # create the map object
    map = folium.Map(location=[lat, long], zoom_start=13)
    
    # add marker to the map
    folium.Marker(location=[lat, long], popup=name).add_to(map)
    
    # display the map
    return map

# example usage
map_location(51.5074, 0.1278, "London")

class Driver:
    def __init__(self, name, vehicle_number, contact_number):
        self.name = name
        self.vehicle_number = vehicle_number
        self.contact_number = contact_number
        
    def __str__(self):
        return f"Driver: {self.name}, Vehicle: {self.vehicle_number}, Contact: {self.contact_number}"

class Vehicle:
    def __init__(self, vehicle_number, make, model, year):
        self.vehicle_number = vehicle_number
        self.make = make
        self.model = model
        self.year = year
        
    def __str__(self):
        return f"Vehicle: {self.vehicle_number}, Make: {self.make}, Model: {self.model}, Year: {self.year}"

# example usage
driver = Driver("John Doe", "AB123456", "555-555-1212")
vehicle = Vehicle("AB123456", "Toyota", "Camry", 2020)
print(driver)
print(vehicle)

import smtplib

def send_email(to, subject, message):
    # specify the email server and port
    server = smtplib.SMTP("smtp.gmail.com", 587)
    
    # start TLS for security
    server.starttls()
    
    # login to the email server
    server.login("[email protected]", "your_email_password")
    
    # send the email
    server.sendmail("[email protected]", to, f"Subject: {subject}\n\n{message}")
    
    # quit the server
    server.quit()

# example usage
send_email("[email protected]", "Test Subject", "Test Message")

import java.util.*;

class Location {
    private double latitude;
    private double longitude;

    public Location(double latitude, double longitude) {
        this.latitude = latitude;
        this.longitude = longitude;
    }

    public double getLatitude() {
        return latitude;
    }

    public double getLongitude() {
        return longitude;
    }
}

class User {
    private String username;
    private String password;
    private String email;
    private Location currentLocation;

    public User(String username, String password, String email) {
        this.username = username;
        this.password = password;
        this.email = email;
    }

    public String getUsername() {
        return username;
    }

    public String getPassword() {
        return password;
    }

    public String getEmail() {
        return email;
    }

    public Location getCurrentLocation() {
        return currentLocation;
    }

    public void setCurrentLocation(Location currentLocation) {
        this.currentLocation = currentLocation;
    }
}

class Driver {
    private String driverId;
    private String name;
    private Location currentLocation;
    private Ride assignedRide;

    public Driver(String driverId, String name) {
        this.driverId = driverId;
        this.name = name;
    }

    public String getDriverId() {
        return driverId;
    }

    public String getName() {
        return name;
    }

    public Location getCurrentLocation() {
        return currentLocation;
    }

    public void setCurrentLocation(Location currentLocation) {
        this.currentLocation = currentLocation;
    }

    public Ride getAssignedRide() {
        return assignedRide;
    }

    public void setAssignedRide(Ride assignedRide) {
        this.assignedRide = assignedRide;
    }
}

class Ride {
    private User user;
    private Driver driver;
    private Location pickupLocation;
    private Location dropoffLocation;

    public Ride(User user, Location pickupLocation, Location dropoffLocation) {
        this.user = user;
        this.pickupLocation = pickupLocation;
        this.dropoffLocation = dropoffLocation;
    }

    public User getUser() {
        return user;
    }

    public Driver getDriver() {
        return driver;
    }

    public void setDriver(Driver driver) {
        this.driver = driver;
    }

    public Location getPickupLocation() {
        return pickupLocation;
    }

    public Location getDropoffLocation() {
        return dropoffLocation;
    }
}

class RideManager {
    private List<Ride> rides;
    private List<Driver> availableDrivers;

    public RideManager() {
        this.rides = new ArrayList<>();
        this.availableDrivers = new ArrayList<>();
    }

    public void addDriver(Driver driver) {
        availableDrivers.add(driver);
    }

    public void requestRide(User user, Location pickupLocation, Location dropoffLocation) {
        if (!availableDrivers.isEmpty()) {
            Driver selectedDriver = findNearestDriver(pickupLocation);
            Ride newRide = new Ride(user, pickupLocation, dropoffLocation);
            newRide.setDriver(selectedDriver);
            rides.add(newRide);
            selectedDriver.setAssignedRide(newRide);
            availableDrivers.remove(selectedDriver);

            System.out.println("Ride requested successfully.");
        } else {
            System.out.println("No available drivers. Please try again later.");
        }
    }

from flask import Flask, jsonify, request

app = Flask(__name__)

# Endpoint for getting driver information
@app.route('/drivers/<int:driver_id>', methods=['GET'])
def get_driver(driver_id):
    # Code to get driver information using driver_id
    driver = {'name': 'John Doe', 'car': 'Toyota Corolla', 'rating': 4.5}
    return jsonify(driver)

# Endpoint for requesting a ride
@app.route('/request-ride', methods=['POST'])
def request_ride():
    # Code to request a ride using pickup and dropoff locations in request body
    pickup = request.json['pickup']
    dropoff = request.json['dropoff']
    return jsonify({'message': f'Requested ride from {pickup} to {dropoff}!'})

# Endpoint for canceling a ride
@app.route('/cancel-ride', methods=['POST'])
def cancel_ride():
    # Code to cancel a ride using ride_id in request body
    ride_id = request.json['ride_id']
    return jsonify({'message': f'Canceled ride {ride_id}!'})

if __name__ == '__main__':
    app.run(debug=True)

# User Service
class User:
    def __init__(self, username, password):
        self.username = username
        self.password = password
        self.rides = []

class UserService:
    def __init__(self):
        self.users = {}

    def sign_up(self, username, password):
        if username in self.users:
            return "Username already exists"
        self.users[username] = User(username, password)
        return "Sign up successful"

    def login(self, username, password):
        if username not in self.users:
            return "Username does not exist"
        user = self.users[username]
        if user.password != password:
            return "Incorrect password"
        return user

# Driver Service
class Driver:
    def __init__(self, username, password, status="available"):
        self.username = username
        self.password = password
        self.status = status
        self.current_ride = None

class DriverService:
    def __init__(self):
        self.drivers = {}

    def sign_up(self, username, password):
        if username in self.drivers:
            return "Username already exists"
        self.drivers[username] = Driver(username, password)
        return "Sign up successful"

    def login(self, username, password):
        if username not in self.drivers:
            return "Username does not exist"
        driver = self.drivers[username]
        if driver.password != password:
            return "Incorrect password"
        return driver

# Ride Service
class Ride:
    def __init__(self, rider, driver, status="requested"):
        self.rider = rider
        self.driver = driver
        self.status = status

class RideService:
    def __init__(self):
        self.rides = []

    def request_ride(self, rider, driver):
        ride = Ride(rider, driver)
        self.rides.append(ride)
        return ride

    def accept_ride(self, ride):
        ride.status = "accepted"
        ride.driver.status = "on a ride"
        ride.driver.current_ride = ride
        return ride

    def reject_ride(self, ride):
        ride.status = "rejected"
        return ride

    def start_ride(self, ride):
        ride.status = "started"
        return ride

    def end_ride(self, ride):
        ride.status = "ended"
        ride.driver.status = "available"
        ride.driver.current_ride = None
        fare = calculate_fare(ride)
        charge_fare(ride, fare)
        return fare

def calculate_fare(ride):
    # Placeholder implementation
    return 100

def charge_fare(ride, fare):
    # Placeholder implementation
    pass

# Initialize services
user_service = UserService()
driver_service = DriverService()
ride_service = RideService()

from flask import Flask, request, jsonify
from flask_sqlalchemy import SQLAlchemy
from flask_socketio import SocketIO

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db'
app.config['SECRET_KEY'] = 'secret_key'
db = SQLAlchemy(app)
socketio = SocketIO(app)

class User(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    email = db.Column(db.String(50))
    password = db.Column(db.String(50))
    role = db.Column(db.String(10))

class Driver(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(50))
    email = db.Column(db.String(50))
    password = db.Column(db.String(50))
    location = db.Column(db.String(50))

class Ride(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
    driver_id = db.Column(db.Integer, db.ForeignKey('driver.id'))
    status = db.Column(db.String(10))
    start_location = db.Column(db.String(50))
    end_location = db.Column(db.String(50))
    start_time = db.Column(db.String(50))
    end_time = db.Column(db.String(50))
    fare = db.Column(db.Float)

@app.route('/api/users', methods=['POST'])
def create_user():
    name = request.json['name']
    email = request.json['email']
    password = request.json['password']
    role = request.json['role']
    user = User(name=name, email=email, password=password, role=role)
    db.session.add(user)
    db.session.commit()
    return jsonify({'message': 'User created successfully!'})

@app.route('/api/drivers', methods=['POST'])
def create_driver():
    name = request.json['name']
    email = request.json['email']
    password = request.json['password']
    driver = Driver(name=name, email=email, password=password)
    db.session.add(driver)
    db.session.commit()
    return jsonify({'message': 'Driver created successfully!'})

@socketio.on('location_update')
def update_location(data):
    driver_id = data['driver_id']
    location = data['location']
    driver = Driver.query.filter_by(id=driver_id).first()
    driver.location = location
    db.session.commit()
    socketio.emit('location_updated', {'driver_id': driver_id, 'location': location})

if __name__ == '__main__':
    db.create_all()
    socketio.run(app)

from socketIO_client import SocketIO, LoggingNamespace

with SocketIO('localhost', 5000, LoggingNamespace) as socketIO:
    socketIO.emit('location_update', {'driver_id': 1, 'location': '50.1234, 20.5678'})

@app.route('/api/rides', methods=['POST'])
def book_ride():
    user_id = request.json['user_id']
    start_location = request.json['start_location']
    end_location = request.json['end_location']
    ride = Ride(user_id=user_id, start_location=start_location, end_location=end_location, status='pending')
    db.session.add(ride)
    db.session.commit()
    return jsonify({'message': 'Ride booked successfully!'})

class User:
    def __init__(self, username, password):
        self.username = username
        self.password = password

    def register(self):
        # Logic to register user and store their credentials
        print("User registered successfully!")

    def login(self):
        # Logic to authenticate user credentials
        if self.username == "valid_username" and self.password == "valid_password":
            print("User logged in successfully!")
        else:
            print("Invalid username or password!")

# Example usage:
user = User("john_doe", "pass123")
user.register()
user.login()

import geocoder

def get_current_location():
    g = geocoder.ip('me')
    if g.latlng:
        latitude, longitude = g.latlng
        return latitude, longitude
    else:
        return None

# Example usage:
location = get_current_location()
if location:
    print("Current latitude:", location[0])
    print("Current longitude:", location[1])
else:
    print("Failed to retrieve current location.")

class Ride:
    def __init__(self, rider, destination):
        self.rider = rider
        self.destination = destination

    def request_ride(self):
        # Logic to request a ride and dispatch it to an available driver
        print("Ride requested successfully!")

    def assign_driver(self, driver):
        # Logic to assign the ride to a specific driver
        print(f"Ride assigned to driver {driver}.")

# Example usage:
rider = "John Doe"
destination = "123 Main Street"
ride = Ride(rider, destination)
ride.request_ride()
ride.assign_driver("Jane Smith")

import math

def calculate_distance(lat1, lon1, lat2, lon2):
    # Radius of the Earth in kilometers
    earth_radius = 6371

    # Convert degrees to radians
    lat1 = math.radians(lat1)
    lon1 = math.radians(lon1)
    lat2 = math.radians(lat2)
    lon2 = math.radians(lon2)

    # Haversine formula
    dlon = lon2 - lon1
    dlat = lat2 - lat1
    a = math.sin(dlat/2)**2 + math.cos(lat1) * math.cos(lat2) * math.sin(dlon/2)**2
    c = 2 * math.atan2(math.sqrt(a), math.sqrt(1-a))
    distance = earth_radius * c

    return distance

# Example usage:
lat1 = 40.7128
lon1 = -74.0060
lat2 = 34.0522
lon2 = -118.2437
distance = calculate_distance(lat1, lon1, lat2, lon2)
print("Distance between the locations:", distance, "km")

class Ride:
    def __init__(self, rider, destination, distance):
        self.rider = rider
        self.destination = destination
        self.distance = distance

    def calculate_fare(self):
        # Logic to calculate the fare based on distance and surge pricing
        base_fare = 2.0
        per_km_charge = 0.5
        total_fare = base_fare + (per_km_charge * self.distance)
        return total_fare

    def process_payment(self, payment_method):
        # Logic to process the payment using the provided payment method
        print(f"Payment of {self.calculate_fare()} USD processed with {payment_method} successfully!")

# Example usage:
rider = "John Doe"
destination = "123 Main Street"
distance = 10.5  # Distance in kilometers
ride = Ride(rider, destination, distance)
ride.process_payment("Credit Card")

class Driver:
    def __init__(self, name):
        self.name = name
        self.available = False
        self.rating = 0.0
        self.earnings = 0.0

    def set_availability(self, is_available):
        # Logic to set driver availability
        self.available = is_available

    def rate_driver(self, rating):
        # Logic to update driver rating based on user feedback
        self.rating = rating

    def update_earnings(self, earnings):
        # Logic to update driver earnings
        self.earnings += earnings

# Example usage:
driver = Driver("Jane Smith")
driver.set_availability(True)
driver.rate_driver(4.5)
driver.update_earnings(15.75)
print("Driver:", driver.name)
print("Availability:", driver.available)
print("Rating:", driver.rating)
print("Earnings:", driver.earnings)

class Trip:
    def __init__(self, rider, driver, destination):
        self.rider = rider
        self.driver = driver
        self.destination = destination
        self.is_cancelled = False

    def track_trip(self):
        # Logic to track the trip in real-time
        print("Tracking trip...")

    def cancel_trip(self):
        # Logic to cancel the trip
        self.is_cancelled = True
        print("Trip cancelled successfully!")

# Example usage:
rider = "John Doe"
driver = "Jane Smith"
destination = "123 Main Street"
trip = Trip(rider, driver, destination)
trip.track_trip()
trip.cancel_trip()
print("Trip status:", "Cancelled" if trip.is_cancelled else "Completed")

class SurgeHandler:
    def __init__(self):
        self.base_fare = 2.0
        self.surge_multiplier = 1.0

    def calculate_fare(self, distance):
        # Logic to calculate the fare based on distance and surge pricing
        total_fare = self.base_fare * self.surge_multiplier + distance
        return total_fare

    def update_surge_multiplier(self, demand_level):
        # Logic to update the surge multiplier based on demand level
        if demand_level == "high":
            self.surge_multiplier = 2.0
        elif demand_level == "medium":
            self.surge_multiplier = 1.5
        else:
            self.surge_multiplier = 1.0

# Example usage:
surge_handler = SurgeHandler()
fare = surge_handler.calculate_fare(10.5)
print("Fare:", fare)
surge_handler.update_surge_multiplier("high")
fare = surge_handler.calculate_fare(10.5)
print("Fare (High demand):", fare)

class AnalyticsEngine:
    def __init__(self):
        self.metrics = []

    def collect_metrics(self, metric):
        # Logic to collect metrics
        self.metrics.append(metric)

    def generate_report(self):
        # Logic to generate a report based on collected metrics
        print("Generating report...")
        for metric in self.metrics:
            print(metric)

# Example usage:
analytics_engine = AnalyticsEngine()
analytics_engine.collect_metrics("User behavior: High demand areas")
analytics_engine.collect_metrics("Driver performance: Average rating")
analytics_engine.collect_metrics("Operational efficiency: Ride completion rate")
analytics_engine.generate_report()

class LoadBalancer:
    def __init__(self, servers):
        self.servers = servers

    def get_server(self, request):
        # Logic to select a server based on load balancing algorithm
        return self.servers[0]  # Example: Select the first server

# Example usage:
servers = ["Server1", "Server2", "Server3", "Server4"]
load_balancer = LoadBalancer(servers)
request = "Example request"
selected_server = load_balancer.get_server(request)
print("Selected server:", selected_server)

class HealthMonitor:
    def __init__(self):
        self.is_healthy = True

    def check_health(self):
        # Logic to check the health of the system
        if self.is_healthy:
            print("System is healthy.")
        else:
            print("System is not healthy. Please investigate.")

# Example usage:
health_monitor = HealthMonitor()
health_monitor.check_health()

class LoadBalancer:
    def __init__(self, servers):
        self.servers = servers

    def get_server(self, request):
        # Logic to select a server based on load balancing algorithm
        return self.servers[0]  # Example: Select the first server

# Example usage:
servers = ["Server1", "Server2", "Server3", "Server4"]
load_balancer = LoadBalancer(servers)
request = "Example request"
selected_server = load_balancer.get_server(request)
print("Selected server:", selected_server)

User Service:

Create new user
Authenticate user
Update user profile
Get user information

Channel Service:

Create new channel
Get channel information
List public and private channels
List channels that a user is a member of

Message Service:

Send message to a channel or user
Get messages from a channel or user
Delete messages

File Service:

Upload file
Get file information
Download file

Integration Service:

Add new integration
Get list of integrated services
Remove integration

Follower Service:

Follow a user
Unfollow a user
Get followers and followees for a user

Feed Generation Service:

Generate user's personalized feed
Rank posts based on relevance, popularity, and user activity

from flask import Flask, jsonify, request

app = Flask(__name__)

# Sample data to store users and channels
users = {}
channels = {}

# User Service
@app.route('/api/users', methods=['POST'])
def create_user():
    data = request.get_json()
    username = data.get('username')
    email = data.get('email')
    password = data.get('password')
    if not username or not email or not password:
        return jsonify({'error': 'Username, email, and password are required'}), 400

    user_id = len(users) + 1
    new_user = {
        'id': user_id,
        'username': username,
        'email': email,
        'password': password
    }
    users[user_id] = new_user
    return jsonify(new_user), 201

@app.route('/api/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    user = users.get(user_id)
    if not user:
        return jsonify({'error': 'User not found'}), 404
    return jsonify(user), 200

@app.route('/api/authenticate', methods=['POST'])
def authenticate_user():
    data = request.get_json()
    email = data.get('email')
    password = data.get('password')
    if not email or not password:
        return jsonify({'error': 'Email and password are required'}), 400

    user = next((user for user in users.values() if user['email'] == email and user['password'] == password), None)
    if not user:
        return jsonify({'error': 'Invalid email or password'}), 401

    return jsonify(user), 200

# Channel Service
@app.route('/api/channels', methods=['POST'])
def create_channel():
    data = request.get_json()
    name = data.get('name')
    channel_type = data.get('type', 'public')
    if not name:
        return jsonify({'error': 'Channel name is required'}), 400

    channel_id = len(channels) + 1
    new_channel = {
        'id': channel_id,
        'name': name,
        'type': channel_type
    }
    channels[channel_id] = new_channel
    return jsonify(new_channel), 201

@app.route('/api/channels/<int:channel_id>', methods=['GET'])
def get_channel(channel_id):
    channel = channels.get(channel_id)
    if not channel:
        return jsonify({'error': 'Channel not found'}), 404
    return jsonify(channel), 200

# Message Service
@app.route('/api/messages', methods=['POST'])
def send_message():
    data = request.get_json()
    sender_id = data.get('sender_id')
    recipient_id = data.get('recipient_id')
    content = data.get('content')
    if not sender_id or not recipient_id or not content:
        return jsonify({'error': 'Sender ID, recipient ID, and content are required'}), 400

    # In a real implementation, you would handle the message sending and storing logic here.
    # For simplicity, we are just returning the input data as the message for this example.
    message = {
        'sender_id': sender_id,
        'recipient_id': recipient_id,
        'content': content
    }
    return jsonify(message), 200

@app.route('/api/messages/<int:user_id>', methods=['GET'])
def get_user_messages(user_id):
    # In a real implementation, you would retrieve messages for the user from the database.
    # For this example, we'll just return sample data.
    messages = [
        {'id': 1, 'sender_id': 2, 'content': 'Hello, user!'},
        {'id': 2, 'sender_id': 3, 'content': 'Hi there!'},
        {'id': 3, 'sender_id': 2, 'content': 'How are you?'},
    ]
    user_messages = [message for message in messages if message['sender_id'] == user_id]
    return jsonify(user_messages), 200

if __name__ == '__main__':
    app.run(debug=True)

# Define the User class
class User:
    def __init__(self, user_id, username, password, email):
        self.user_id = user_id
        self.username = username
        self.password = password
        self.email = email
        # Other user attributes (e.g., name, profile picture)

# Define the Channel class
class Channel:
    def __init__(self, channel_id, name, channel_type):
        self.channel_id = channel_id
        self.name = name
        self.channel_type = channel_type

# Define the Message class
class Message:
    def __init__(self, message_id, user_id, channel_id, content, timestamp):
        self.message_id = message_id
        self.user_id = user_id
        self.channel_id = channel_id
        self.content = content
        self.timestamp = timestamp

# Define the File class
class File:
    def __init__(self, file_id, user_id, channel_id, file_url, timestamp):
        self.file_id = file_id
        self.user_id = user_id
        self.channel_id = channel_id
        self.file_url = file_url
        self.timestamp = timestamp

# Define the Integration class
class Integration:
    def __init__(self, integration_id, user_id, service_name, api_key):
        self.integration_id = integration_id
        self.user_id = user_id
        self.service_name = service_name
        self.api_key = api_key

# Define the Follower class
class Follower:
    def __init__(self, follower_id, followee_id):
        self.follower_id = follower_id
        self.followee_id = followee_id

User Management API:

POST /users: Create a new user.
GET /users/{user_id}: Get user information by user ID.
PATCH /users/{user_id}: Update user profile information by user ID.

Channel Management API:

POST /channels: Create a new channel.
GET /channels/{channel_id}: Get channel information by channel ID.

Message API:

POST /messages: Send a message to a channel.
GET /channels/{channel_id}/messages: Get messages from a channel.

File API:

POST /files: Upload a file to a channel.
GET /channels/{channel_id}/files: Get files from a channel.
Integration API:

POST /users/{user_id}/integrations: Add a new integration for a user.
GET /users/{user_id}/integrations: Get a list of integrations for a user.
DELETE /users/{user_id}/integrations/{integration_id}: Remove an integration for a user.

Follower API:

POST /users/{follower_id}/follow/{followee_id}: Follow a user.
POST /users/{follower_id}/unfollow/{followee_id}: Unfollow a user.
GET /users/{user_id}/followers: Get followers of a user.
GET /users/{user_id}/following: Get users followed by a user.
Feed Generation API:

GET /users/{user_id}/feed: Get the personalized feed for a user.

User Authentication API
POST /api/auth/signup: Allows users to sign up with their email and password.
POST /api/auth/login: Enables users to log in with their credentials and receive an access token.
POST /api/auth/logout: Logs out the user and invalidates their access token.

Messaging API
POST /api/messages/send: Allows users to send messages to a channel or directly to another user.
GET /api/messages/:channel_id: Retrieves all messages from a specific channel.
GET /api/messages/direct/:user_id: Retrieves all direct messages between the current user and another user.
DELETE /api/messages/:message_id: Deletes a specific message.

Channel API
POST /api/channels/create: Allows users to create a new public or private channel.
GET /api/channels/:channel_id: Retrieves information about a specific channel.
GET /api/channels/public: Retrieves a list of public channels.
GET /api/channels/private: Retrieves a list of private channels.

File API
POST /api/files/upload: Allows users to upload files to the system.
GET /api/files/:file_id: Retrieves information about a specific file.
GET /api/files/:file_id/download: Downloads a specific file.

Integration API
POST /api/integrations/add: Enables users to add third-party integrations.
GET /api/integrations/list: Retrieves a list of all integrated third-party services.
DELETE /api/integrations/:integration_id: Removes a specific third-party integration.

from flask import Flask, jsonify, request

app = Flask(__name__)

# Sample data to store users, channels, messages, and files
users = {}
channels = {}
messages = {}
files = {}

# User Authentication API
@app.route('/api/auth/signup', methods=['POST'])
def signup():
    data = request.get_json()
    email = data.get('email')
    password = data.get('password')
    if not email or not password:
        return jsonify({'error': 'Email and password are required'}), 400
    
    # Create a new user with the provided data (in a real implementation, use a database)
    user_id = len(users) + 1
    users[user_id] = {
        'id': user_id,
        'email': email,
        'password': password
    }
    return jsonify({'message': 'User signup successful'}), 200

@app.route('/api/auth/login', methods=['POST'])
def login():
    data = request.get_json()
    email = data.get('email')
    password = data.get('password')
    if not email or not password:
        return jsonify({'error': 'Email and password are required'}), 400

    # Check if the user exists and the password is correct (in a real implementation, use a database)
    user = next((user for user in users.values() if user['email'] == email), None)
    if not user or user['password'] != password:
        return jsonify({'error': 'Invalid email or password'}), 401

    # Generate and return an access token (in a real implementation, use a JWT or similar mechanism)
    access_token = f'your_generated_access_token_for_user_{user["id"]}'
    return jsonify({'access_token': access_token}), 200

@app.route('/api/auth/logout', methods=['POST'])
def logout():
    # In a real implementation, handle invalidating the user's access token
    return jsonify({'message': 'User logged out successfully'}), 200

# Messaging API
@app.route('/api/messages/send', methods=['POST'])
def send_message():
    data = request.get_json()
    sender_id = data.get('sender_id')
    recipient_id = data.get('recipient_id')
    message_content = data.get('content')
    if not sender_id or not recipient_id or not message_content:
        return jsonify({'error': 'Sender ID, recipient ID, and message content are required'}), 400

    # Save the message (in a real implementation, use a database)
    message_id = len(messages) + 1
    messages[message_id] = {
        'id': message_id,
        'sender_id': sender_id,
        'recipient_id': recipient_id,
        'content': message_content
    }
    return jsonify({'message': 'Message sent successfully'}), 200

@app.route('/api/messages/<int:user_id>', methods=['GET'])
def get_messages(user_id):
    # Retrieve messages for the given user ID (in a real implementation, use a database)
    user_messages = [message for message in messages.values() if message['recipient_id'] == user_id]
    return jsonify(user_messages), 200

# ... Implement other APIs following a similar pattern ...

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data to store users, channels, messages, files, integrations, and followers
users = {}
channels = {}
messages = {}
files = {}
integrations = {}
followers = []

# User Management API
@app.route('/api/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = len(users) + 1
    new_user = User(user_id, data['username'], data['password'], data['email'])
    users[user_id] = new_user
    return jsonify({'message': 'User created successfully', 'user_id': user_id}), 201

@app.route('/api/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    user = users.get(user_id)
    if user:
        return jsonify({'user_id': user.user_id, 'username': user.username, 'email': user.email}), 200
    return jsonify({'message': 'User not found'}), 404

# Channel Management API
@app.route('/api/channels', methods=['POST'])
def create_channel():
    data = request.get_json()
    channel_id = len(channels) + 1
    new_channel = Channel(channel_id, data['name'], data['type'])
    channels[channel_id] = new_channel
    return jsonify({'message': 'Channel created successfully', 'channel_id': channel_id}), 201

@app.route('/api/channels/<int:channel_id>', methods=['GET'])
def get_channel(channel_id):
    channel = channels.get(channel_id)
    if channel:
        return jsonify({'channel_id': channel.channel_id, 'name': channel.name, 'type': channel.channel_type}), 200
    return jsonify({'message': 'Channel not found'}), 404

# Message API
@app.route('/api/messages', methods=['POST'])
def send_message():
    data = request.get_json()
    message_id = len(messages) + 1
    new_message = Message(message_id, data['user_id'], data['channel_id'], data['content'], data['timestamp'])
    messages[message_id] = new_message
    return jsonify({'message': 'Message sent successfully', 'message_id': message_id}), 200

@app.route('/api/channels/<int:channel_id>/messages', methods=['GET'])
def get_messages(channel_id):
    channel_messages = [message for message in messages.values() if message.channel_id == channel_id]
    if channel_messages:
        return jsonify({'messages': [{'message_id': message.message_id, 'user_id': message.user_id,
                                      'content': message.content, 'timestamp': message.timestamp}
                                     for message in channel_messages]}), 200
    return jsonify({'message': 'No messages found for this channel'}), 404

# File API
# Implement similar endpoints as above for file upload and retrieval

# Integration API
# Implement endpoints for adding, retrieving, and removing integrations

# Follower API
# Implement endpoints for following, unfollowing, and retrieving followers/followees

if __name__ == '__main__':
    app.run(debug=True)

# Sample implementation for user growth
class User:
    def __init__(self, user_id, email):
        self.user_id = user_id
        self.email = email

class UserManagement:
    def __init__(self):
        self.users = {}

    def add_user(self, email):
        user_id = len(self.users) + 1
        new_user = User(user_id, email)
        self.users[user_id] = new_user
        return new_user

    def get_user(self, user_id):
        return self.users.get(user_id, None)

# Usage example
user_management = UserManagement()
user1 = user_management.add_user("[email protected]")
user2 = user_management.add_user("[email protected]")
print(user1.email)  # Output: [email protected]
print(user2.email)  # Output: [email protected]

# Sample implementation for handling messages
class Message:
    def __init__(self, message_id, sender_id, recipient_id, content):
        self.message_id = message_id
        self.sender_id = sender_id
        self.recipient_id = recipient_id
        self.content = content

class MessageManagement:
    def __init__(self):
        self.messages = {}

    def send_message(self, sender_id, recipient_id, content):
        message_id = len(self.messages) + 1
        new_message = Message(message_id, sender_id, recipient_id, content)
        self.messages[message_id] = new_message
        return new_message

    def get_messages_by_recipient(self, recipient_id):
        return [message for message in self.messages.values() if message.recipient_id == recipient_id]

# Usage example
message_management = MessageManagement()
message1 = message_management.send_message(1, 2, "Hello, user2!")
message2 = message_management.send_message(2, 1, "Hi, user1!")
user1_messages = message_management.get_messages_by_recipient(1)
for message in user1_messages:
    print(f"Message from User {message.sender_id}: {message.content}")
# Output:
# Message from User 2: Hi, user1!

# Sample implementation for file storage
class File:
    def __init__(self, file_id, filename, content):
        self.file_id = file_id
        self.filename = filename
        self.content = content

class FileStorage:
    def __init__(self):
        self.files = {}

    def upload_file(self, filename, content):
        file_id = len(self.files) + 1
        new_file = File(file_id, filename, content)
        self.files[file_id] = new_file
        return new_file

    def get_file_by_id(self, file_id):
        return self.files.get(file_id, None)

# Usage example
file_storage = FileStorage()
file1 = file_storage.upload_file("document.txt", "This is the content of the file.")
file2 = file_storage.upload_file("image.jpg", "Binary content of the image.")
print(file1.filename)  # Output: document.txt
print(file2.filename)  # Output: image.jpg

# Sample implementation for third-party integrations
class Integration:
    def __init__(self, integration_id, name, api_key):
        self.integration_id = integration_id
        self.name = name
        self.api_key = api_key

class IntegrationManager:
    def __init__(self):
        self.integrations = {}

    def add_integration(self, name, api_key):
        integration_id = len(self.integrations) + 1
        new_integration = Integration(integration_id, name, api_key)
        self.integrations[integration_id] = new_integration
        return new_integration

    def get_integration_by_id(self, integration_id):
        return self.integrations.get(integration_id, None)

# Usage example
integration_manager = IntegrationManager()
integration1 = integration_manager.add_integration("Weather API", "your_weather_api_key")
integration2 = integration_manager.add_integration("Calendar API", "your_calendar_api_key")
print(integration1.name)  # Output: Weather API
print(integration2.name)  # Output: Calendar API

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data to be stored in the server
users = {
    "user1": {
        "name": "John Doe",
        "followers": ["user2", "user3"],
        "following": ["user2", "user3"],
        "posts": [
            {
                "id": 1,
                "caption": "This is my first post!",
                "image_url": "https://example.com/images/post1.jpg",
                "timestamp": "2022-02-18 14:30:00"
            },
            {
                "id": 2,
                "caption": "Another post!",
                "image_url": "https://example.com/images/post2.jpg",
                "timestamp": "2022-02-18 14:35:00"
            }
        ]
    },
    "user2": {
        "name": "Jane Doe",
        "followers": ["user1"],
        "following": ["user1"],
        "posts": [
            {
                "id": 3,
                "caption": "Hello world!",
                "image_url": "https://example.com/images/post3.jpg",
                "timestamp": "2022-02-18 14:40:00"
            }
        ]
    },
    "user3": {
        "name": "Bob Smith",
        "followers": ["user1"],
        "following": ["user1"],
        "posts": []
    }
}

# User management API
@app.route('/users/<username>', methods=['GET'])
def get_user(username):
    if username in users:
        return users[username], 200
    else:
        return "User not found", 404

@app.route('/users/<follower>/follow/<following>', methods=['POST'])
def follow_user(follower, following):
    if follower in users and following in users:
        if following not in users[follower]['following']:
            users[follower]['following'].append(following)
            users[following]['followers'].append(follower)
        return "User followed", 200
    else:
        return "User not found", 404

@app.route('/users/<follower>/unfollow/<following>', methods=['POST'])
def unfollow_user(follower, following):
    if follower in users and following in users:
        if following in users[follower]['following']:
            users[follower]['following'].remove(following)
            users[following]['followers'].remove(follower)
        return "User unfollowed", 200
    else:
        return "User not found", 404

@app.route('/users/<username>/posts', methods=['POST'])
def create_post(username):
    if username in users:
        data = request.json
        caption = data.get('caption')
        image_url = data.get('image_url')
        timestamp = data.get('timestamp')
        post_id = len(users[username]['posts']) + 1
        post = {"id": post_id, "caption": caption, "image_url": image_url, "timestamp": timestamp}
        users[username]['posts'].append(post)
        return "Post created", 200
    else:
        return "User not found", 404

@app.route('/users/<username>/feed', methods=['GET'])
def get_feed(username):
    if username in users:
        feed = []
        for user in users[username]['following']:
            feed.extend(users[user]['posts'])
        sorted_feed = sorted(feed, key=lambda post: post['timestamp'], reverse=True)
        return jsonify({"feed": sorted_feed}), 200
    else:
        return "User not found", 404

if __name__ == '__main__':
    app.run(debug=True)

class User:
    def __init__(self, user_id, username, password):
        self.user_id = user_id
        self.username = username
        self.password = password
        self.followers = []
        self.following = []
        self.posts = []

class Property:
    def __init__(self, property_id, host_id, title, description, price, location, amenities):
        self.property_id = property_id
        self.host_id = host_id
        self.title = title
        self.description = description
        self.price = price
        self.location = location
        self.amenities = amenities
        self.images = []

class Image:
    def __init__(self, image_id, property_id, image_url):
        self.image_id = image_id
        self.property_id = property_id
        self.image_url = image_url

class Booking:
    def __init__(self, booking_id, property_id, guest_id, check_in_date, check_out_date):
        self.booking_id = booking_id
        self.property_id = property_id
        self.guest_id = guest_id
        self.check_in_date = check_in_date
        self.check_out_date = check_out_date

class Like:
    def __init__(self, like_id, property_id, user_id, timestamp):
        self.like_id = like_id
        self.property_id = property_id
        self.user_id = user_id
        self.timestamp = timestamp

class Comment:
    def __init__(self, comment_id, property_id, user_id, caption, timestamp):
        self.comment_id = comment_id
        self.property_id = property_id
        self.user_id = user_id
        self.caption = caption
        self.timestamp = timestamp

User Management API:

Create User (POST /users)

Create a new user account.
Request body: {"username": "john_doe", "password": "securepassword", "email": "[email protected]"}
Login (POST /login)

Authenticate and log in a user.
Request body: {"username": "john_doe", "password": "securepassword"}
Update Profile (PATCH /users/{user_id})

Update the user's profile information.
Request body: {"bio": "I love traveling and exploring new places!"}
Headers: Authorization: Bearer <access_token>
Get User Profile (GET /users/{user_id})

Retrieve the user's profile information.
Headers: Authorization: Bearer <access_token>
Property Management API:

Create Property Listing (POST /properties)

Create a new property listing.
Request body: {"title": "Cozy Cabin in the Woods", "description": "A beautiful cabin surrounded by nature", "price": 100, "location": "Forest", "amenities": ["Wi-Fi", "Fireplace", "Kitchen"]}
Headers: Authorization: Bearer <access_token>
Get Property Details (GET /properties/{property_id})

Retrieve details of a specific property.
Headers: Authorization: Bearer <access_token>
Upload Property Image (POST /properties/{property_id}/images)

Upload an image for a property.
Request body: Image file
Headers: Authorization: Bearer <access_token>
Booking API:

Create Booking (POST /properties/{property_id}/bookings)

Create a booking for a specific property.
Request body: {"check_in_date": "2023-08-01", "check_out_date": "2023-08-07"}
Headers: Authorization: Bearer <access_token>
Get Booking Details (GET /bookings/{booking_id})

Retrieve details of a specific booking.
Headers: Authorization: Bearer <access_token>
Like and Comment API:

Like Property (POST /properties/{property_id}/like)

Like a specific property.
Headers: Authorization: Bearer <access_token>
Unlike Property (DELETE /properties/{property_id}/like)

Unlike a property.
Headers: Authorization: Bearer <access_token>
Add Comment (POST /properties/{property_id}/comments)

Add a comment to a property.
Request body: {"caption": "This place looks amazing!"}
Headers: Authorization: Bearer <access_token>
Feed Generation API:

Get User Feed (GET /feed)
Retrieve a personalized feed of properties based on the user's interests and activities.
Headers: Authorization: Bearer <access_token>

User Registration:

Endpoint: /api/register
Method: POST
Description: Allows users to register for a new account.
Request Body: { "username": "user123", "password": "securepassword" }
Response: { "message": "Registration successful." }

User Login:

Endpoint: /api/login
Method: POST
Description: Allows users to log in to their account.
Request Body: { "username": "user123", "password": "securepassword" }
Response: { "token": "<JWT_TOKEN>" }

Listing Creation:

Endpoint: /api/listings
Method: POST
Description: Allows hosts to create a new property listing.
Request Body: { "title": "Cozy Apartment", "description": "A lovely apartment...", "price": 100, "location": "New York" }
Response: { "message": "Listing created successfully." }

Listing Details:

Endpoint: /api/listings/{listing_id}
Method: GET
Description: Retrieves details of a specific property listing.
Response: { "listing_id": 123, "title": "Cozy Apartment", "description": "A lovely apartment...", "price": 100, "location": "New York" }

Search Listings:

Endpoint: /api/listings/search
Method: GET
Description: Allows users to search for properties based on specific criteria.
Query Parameters: location, check_in_date, check_out_date, max_price, etc.
Response: [{ "listing_id": 123, "title": "Cozy Apartment", ... }, { ... }]

Booking a Listing:

Endpoint: /api/bookings
Method: POST
Description: Allows users to book a property for a specific date range.
Request Body: { "listing_id": 123, "check_in_date": "2023-08-01", "check_out_date": "2023-08-05" }
Response: { "message": "Booking successful." }

Get User Bookings:

Endpoint: /api/bookings
Method: GET
Description: Retrieves all bookings made by the user.
Response: [{ "booking_id": 456, "listing_id": 123, ... }, { ... }]

from flask import Flask, request, jsonify

app = Flask(__name__)

# In a real system, user and listing data would be stored in a database
users = {}
listings = {}
bookings = []
next_booking_id = 1

# High-level API endpoints
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.json
    username = data.get('username')
    password = data.get('password')
    if not username or not password:
        return jsonify({"error": "Invalid data"}), 400
    if username in users:
        return jsonify({"error": "Username already exists"}), 409
    users[username] = password
    return jsonify({"message": "Registration successful."}), 201

@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.json
    username = data.get('username')
    password = data.get('password')
    if not username or not password or users.get(username) != password:
        return jsonify({"error": "Invalid credentials"}), 401
    # In a real system, you would use JWT for authentication
    return jsonify({"token": "JWT_TOKEN"}), 200

@app.route('/api/listings', methods=['POST'])
def create_listing():
    data = request.json
    # In a real system, the authenticated user's token should be checked for host privilege
    title = data.get('title')
    description = data.get('description')
    price = data.get('price')
    location = data.get('location')
    if not title or not description or not price or not location:
        return jsonify({"error": "Invalid data"}), 400
    listing_id = len(listings) + 1
    listings[listing_id] = {
        "title": title,
        "description": description,
        "price": price,
        "location": location
    }
    return jsonify({"message": "Listing created successfully."}), 201

@app.route('/api/listings/<int:listing_id>', methods=['GET'])
def get_listing(listing_id):
    listing = listings.get(listing_id)
    if not listing:
        return jsonify({"error": "Listing not found"}), 404
    return jsonify(listing), 200

@app.route('/api/bookings', methods=['POST'])
def create_booking():
    data = request.json
    # In a real system, the authenticated user's token should be checked for booking privilege
    listing_id = data.get('listing_id')
    check_in_date = data.get('check_in_date')
    check_out_date = data.get('check_out_date')
    if not listing_id or not check_in_date or not check_out_date:
        return jsonify({"error": "Invalid data"}), 400
    global next_booking_id
    booking_id = next_booking_id
    next_booking_id += 1
    bookings.append({
        "booking_id": booking_id,
        "listing_id": listing_id,
        "check_in_date": check_in_date,
        "check_out_date": check_out_date
    })
    return jsonify({"message": "Booking successful."}), 201

@app.route('/api/bookings', methods=['GET'])
def get_user_bookings():
    # In a real system, the authenticated user's token should be used to fetch their bookings
    return jsonify(bookings), 200

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, jsonify

app = Flask(__name__)

# Data storage placeholders (In a real system, use databases to store data)
users = {}
listings = {}
bookings = []
next_booking_id = 1

# User Registration and Authentication

@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.json
    username = data.get('username')
    password = data.get('password')
    if not username or not password:
        return jsonify({"error": "Invalid data"}), 400
    if username in users:
        return jsonify({"error": "Username already exists"}), 409
    users[username] = password
    return jsonify({"message": "Registration successful."}), 201

@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.json
    username = data.get('username')
    password = data.get('password')
    if not username or not password or users.get(username) != password:
        return jsonify({"error": "Invalid credentials"}), 401
    # In a real system, you would use JWT for authentication
    return jsonify({"token": "JWT_TOKEN"}), 200

# Listing Management

@app.route('/api/listings', methods=['POST'])
def create_listing():
    data = request.json
    # In a real system, the authenticated user's token should be checked for host privilege
    title = data.get('title')
    description = data.get('description')
    price = data.get('price')
    location = data.get('location')
    amenities = data.get('amenities')
    if not title or not description or not price or not location:
        return jsonify({"error": "Invalid data"}), 400
    listing_id = len(listings) + 1
    listings[listing_id] = {
        "title": title,
        "description": description,
        "price": price,
        "location": location,
        "amenities": amenities
    }
    return jsonify({"message": "Listing created successfully."}), 201

# Search and Filters

@app.route('/api/listings/search', methods=['GET'])
def search_listings():
    location = request.args.get('location')
    check_in_date = request.args.get('check_in_date')
    check_out_date = request.args.get('check_out_date')
    max_price = request.args.get('max_price')
    # Implement search logic based on provided parameters
    # In a real system, you would use a database for efficient searching
    search_results = []
    for listing_id, listing in listings.items():
        if (not location or location.lower() in listing['location'].lower()) and \
           (not check_in_date or check_in_date >= listing.get('check_in_date', '')) and \
           (not check_out_date or check_out_date <= listing.get('check_out_date', '')) and \
           (not max_price or max_price >= listing['price']):
            search_results.append(listing)
    return jsonify(search_results), 200

# Booking and Reservations

@app.route('/api/bookings', methods=['POST'])
def create_booking():
    data = request.json
    # In a real system, the authenticated user's token should be checked for booking privilege
    listing_id = data.get('listing_id')
    check_in_date = data.get('check_in_date')
    check_out_date = data.get('check_out_date')
    if not listing_id or not check_in_date or not check_out_date:
        return jsonify({"error": "Invalid data"}), 400
    global next_booking_id
    booking_id = next_booking_id
    next_booking_id += 1
    bookings.append({
        "booking_id": booking_id,
        "listing_id": listing_id,
        "check_in_date": check_in_date,
        "check_out_date": check_out_date
    })
    return jsonify({"message": "Booking successful."}), 201

# Payment Gateway (Placeholder for payment logic)

@app.route('/api/payment', methods=['POST'])
def process_payment():
    data = request.json
    # In a real system, implement secure payment processing logic
    # using a third-party payment gateway and handle transactions
    return jsonify({"message": "Payment processed successfully."}), 200

# Messaging and Communication

@app.route('/api/messages', methods=['POST'])
def send_message():
    data = request.json
    # In a real system, the authenticated user's token should be used to identify the sender
    sender_id = data.get('sender_id')
    receiver_id = data.get('receiver_id')
    message_content = data.get('message_content')
    if not sender_id or not receiver_id or not message_content:
        return jsonify({"error": "Invalid data"}), 400
    # Implement message sending logic
    # In a real system, you might store messages in a database or use a message broker
    return jsonify({"message": "Message sent successfully."}), 200

# Review and Rating System

@app.route('/api/reviews', methods=['POST'])
def leave_review():
    data = request.json
    # In a real system, the authenticated user's token should be used to identify the reviewer
    reviewer_id = data.get('reviewer_id')
    reviewee_id = data.get('reviewee_id')
    rating = data.get('rating')
    comment = data.get('comment')
    if not reviewer_id or not reviewee_id or not rating:
        return jsonify({"error": "Invalid data"}), 400
    # Implement review and rating logic
    # In a real system, you might store reviews and ratings in a database
    return jsonify({"message": "Review submitted successfully."}), 201

if __name__ == '__main__':
    app.run(debug=True)

class VimeoSimulation:
    def __init__(self):
        self.total_users = 500_000_000
        self.daily_active_users = 150_000_000
        self.videos_watched_per_user_per_day = 2
        self.total_videos_watched_per_day = 300_000_000
        self.read_to_write_ratio = 100
        self.videos_uploaded_per_day = self.total_videos_watched_per_day // self.read_to_write_ratio
        self.average_video_size_mb = 100
        self.storage_per_day_tb = self.videos_uploaded_per_day * self.average_video_size_mb / 1024  # in TB
        self.storage_next_3_years_pb = self.storage_per_day_tb * 365 * 5  # in PB
        self.requests_per_second = self.total_videos_watched_per_day / (3600 * 24)  # per second

    def print_simulation_results(self):
        print(f"Total number of users: {self.total_users}")
        print(f"Daily active users: {self.daily_active_users}")
        print(f"Total videos watched per day: {self.total_videos_watched_per_day}")
        print(f"Videos uploaded per day: {self.videos_uploaded_per_day}")
        print(f"Total storage per day: {self.storage_per_day_tb:.2f} TB")
        print(f"Storage for the next 3 years: {self.storage_next_3_years_pb:.2f} PB")
        print(f"Requests per second: {self.requests_per_second:.2f} requests/second")


if __name__ == "__main__":
    vimeo_sim = VimeoSimulation()
    vimeo_sim.print_simulation_results()

import requests

# Define the Vimeo API endpoint
base_url = 'https://api.vimeo.com/'
# Define the access token for the API
access_token = '<YOUR_ACCESS_TOKEN_HERE>'
# Define the endpoint for the user's feed
feed_endpoint = f'{base_url}me/feed'
# Define the function to retrieve the user's Vimeo feed
def get_feed():
    # Send a GET request to the feed endpoint
    headers = {'Authorization': f'Bearer {access_token}'}
    response = requests.get(feed_endpoint, headers=headers)
    # Decode the response as JSON
    data = response.json()
    # Extract the relevant data from the response
    feed = []
    for item in data['data']:
        video_info = {
            'video_id': item['uri'].split('/')[-1],
            'video_title': item['name'],
            'video_url': item['link'],
            'caption': item.get('description', ''),
            'timestamp': item['created_time']
        }
        feed.append(video_info)
    return feed

class User:
    def __init__(self, user_id, username, password):
        self.user_id = user_id
        self.username = username
        self.password = password
        # Other user attributes like name, email, etc.
        self.following = []
        self.followers = []

class Video:
    def __init__(self, video_id, user, caption, video_url, timestamp):
        self.video_id = video_id
        self.user = user
        self.caption = caption
        self.video_url = video_url
        self.timestamp = timestamp
        # Other video attributes like likes, comments, etc.

class Likes:
    def __init__(self, like_id, user, video, timestamp):
        self.like_id = like_id
        self.user = user
        self.video = video
        self.timestamp = timestamp

class Comments:
    def __init__(self, comment_id, user, video, caption, timestamp):
        self.comment_id = comment_id
        self.user = user
        self.video = video
        self.caption = caption
        self.timestamp = timestamp

from flask import Flask, request, jsonify

app = Flask(__name__)

# In a real system, user data would be stored in a database.
users = {}

# In a real system, video data would be stored in a database.
videos = {}


@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')

    if username and password:
        if username in users:
            return jsonify({"message": "Username already exists"}), 400

        users[username] = {'password': password, 'profile': {}}
        return jsonify({"message": "User registered successfully"}), 201

    return jsonify({"message": "Invalid data"}), 400


@app.route('/api/login', methods=['POST'])
def login():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')

    if username in users and users[username]['password'] == password:
        return jsonify({"message": "Login successful"}), 200

    return jsonify({"message": "Invalid credentials"}), 401


@app.route('/api/user/<username>', methods=['GET', 'PUT', 'DELETE'])
def user(username):
    if username not in users:
        return jsonify({"message": "User not found"}), 404

    if request.method == 'GET':
        return jsonify(users[username]['profile']), 200

    if request.method == 'PUT':
        data = request.get_json()
        users[username]['profile'] = data
        return jsonify({"message": "User profile updated successfully"}), 200

    if request.method == 'DELETE':
        del users[username]
        return jsonify({"message": "User account deleted"}), 200


@app.route('/api/video', methods=['POST'])
def upload_video():
    data = request.get_json()
    title = data.get('title')
    description = data.get('description')
    # Additional video data processing and storage logic can be added here.

    # For simplicity, we'll use a unique ID as a placeholder for video storage.
    video_id = len(videos) + 1
    videos[video_id] = {'title': title, 'description': description}

    return jsonify({"message": "Video uploaded successfully", "video_id": video_id}), 201


@app.route('/api/video/<int:video_id>', methods=['GET', 'PUT', 'DELETE'])
def video(video_id):
    if video_id not in videos:
        return jsonify({"message": "Video not found"}), 404

    if request.method == 'GET':
        return jsonify(videos[video_id]), 200

    if request.method == 'PUT':
        data = request.get_json()
        videos[video_id]['title'] = data.get('title', videos[video_id]['title'])
        videos[video_id]['description'] = data.get('description', videos[video_id]['description'])
        return jsonify({"message": "Video information updated successfully"}), 200

    if request.method == 'DELETE':
        del videos[video_id]
        return jsonify({"message": "Video deleted"}), 200


if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, jsonify

app = Flask(__name__)

# In a real system, user data would be stored in a database.
users = {}

@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')

    if username and password:
        if username in users:
            return jsonify({"message": "Username already exists"}), 400

        users[username] = {'password': password, 'profile': {}}
        return jsonify({"message": "User registered successfully"}), 201

    return jsonify({"message": "Invalid data"}), 400

@app.route('/api/login', methods=['POST'])
def login():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')

    if username in users and users[username]['password'] == password:
        return jsonify({"message": "Login successful"}), 200

    return jsonify({"message": "Invalid credentials"}), 401

@app.route('/api/user/<username>', methods=['GET', 'PUT', 'DELETE'])
def user(username):
    if username not in users:
        return jsonify({"message": "User not found"}), 404

    if request.method == 'GET':
        return jsonify(users[username]['profile']), 200

    if request.method == 'PUT':
        data = request.get_json()
        users[username]['profile'] = data
        return jsonify({"message": "User profile updated successfully"}), 200

    if request.method == 'DELETE':
        del users[username]
        return jsonify({"message": "User account deleted"}), 200

if __name__ == '__main__':
    app.run(debug=True)

# In a real system, video data would be stored in a database.
videos = {}

@app.route('/api/video', methods=['POST'])
def upload_video():
    data = request.get_json()
    title = data.get('title')
    description = data.get('description')
    # Additional video data processing and storage logic can be added here.

    # For simplicity, we'll use a unique ID as a placeholder for video storage.
    video_id = len(videos) + 1
    videos[video_id] = {'title': title, 'description': description}

    return jsonify({"message": "Video uploaded successfully", "video_id": video_id}), 201

@app.route('/api/video/<int:video_id>', methods=['GET', 'PUT', 'DELETE'])
def video(video_id):
    if video_id not in videos:
        return jsonify({"message": "Video not found"}), 404

    if request.method == 'GET':
        return jsonify(videos[video_id]), 200

    if request.method == 'PUT':
        data = request.get_json()
        videos[video_id]['title'] = data.get('title', videos[video_id]['title'])
        videos[video_id]['description'] = data.get('description', videos[video_id]['description'])
        return jsonify({"message": "Video information updated successfully"}), 200

    if request.method == 'DELETE':
        del videos[video_id]
        return jsonify({"message": "Video deleted"}), 200

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, jsonify

app = Flask(__name__)

# In a real system, user data would be stored in a database.
users = {}

# In a real system, video data would be stored in a database.
videos = {}

# In a real system, analytics data would be stored in a database or processed through an analytics engine.
analytics_data = {
    'video_views': {},
    'video_likes': {},
    'video_comments': {},
    'user_views': {},
    'user_likes': {},
    'user_comments': {}
}


# User Management API Endpoints
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')

    if username and password:
        if username in users:
            return jsonify({"message": "Username already exists"}), 400

        users[username] = {'password': password, 'profile': {}}
        return jsonify({"message": "User registered successfully"}), 201

    return jsonify({"message": "Invalid data"}), 400


@app.route('/api/login', methods=['POST'])
def login():
    data = request.get_json()
    username = data.get('username')
    password = data.get('password')

    if username in users and users[username]['password'] == password:
        return jsonify({"message": "Login successful"}), 200

    return jsonify({"message": "Invalid credentials"}), 401


@app.route('/api/user/<username>', methods=['GET', 'PUT', 'DELETE'])
def user(username):
    if username not in users:
        return jsonify({"message": "User not found"}), 404

    if request.method == 'GET':
        return jsonify(users[username]['profile']), 200

    if request.method == 'PUT':
        data = request.get_json()
        users[username]['profile'] = data
        return jsonify({"message": "User profile updated successfully"}), 200

    if request.method == 'DELETE':
        del users[username]
        return jsonify({"message": "User account deleted"}), 200


# Video Management API Endpoints
@app.route('/api/video', methods=['POST'])
def upload_video():
    data = request.get_json()
    title = data.get('title')
    description = data.get('description')

    # Additional video data processing and storage logic can be added here.

    # For simplicity, we'll use a unique ID as a placeholder for video storage.
    video_id = len(videos) + 1
    videos[video_id] = {'title': title, 'description': description}

    return jsonify({"message": "Video uploaded successfully", "video_id": video_id}), 201


@app.route('/api/video/<int:video_id>', methods=['GET', 'PUT', 'DELETE'])
def video(video_id):
    if video_id not in videos:
        return jsonify({"message": "Video not found"}), 404

    if request.method == 'GET':
        return jsonify(videos[video_id]), 200

    if request.method == 'PUT':
        data = request.get_json()
        videos[video_id]['title'] = data.get('title', videos[video_id]['title'])
        videos[video_id]['description'] = data.get('description', videos[video_id]['description'])
        return jsonify({"message": "Video information updated successfully"}), 200

    if request.method == 'DELETE':
        del videos[video_id]
        return jsonify({"message": "Video deleted"}), 200


# Analytics API Endpoints
@app.route('/api/video/<int:video_id>/views', methods=['GET'])
def get_video_views(video_id):
    if video_id not in videos:
        return jsonify({"message": "Video not found"}), 404

    # In a real system, fetch the view count from analytics data.
    view_count = analytics_data['video_views'].get(video_id, 0)
    return jsonify({"views": view_count}), 200


@app.route('/api/video/<int:video_id>/likes', methods=['GET'])
def get_video_likes(video_id):
    if video_id not in videos:
        return jsonify({"message": "Video not found"}), 404

    # In a real system, fetch the like count from analytics data.
    like_count = analytics_data['video_likes'].get(video_id, 0)
    return jsonify({"likes": like_count}), 200


@app.route('/api/user/<username>/views', methods=['GET'])
def get_user_views(username):
    if username not in users:
        return jsonify({"message": "User not found"}), 404

    # In a real system, fetch the total view count for the user from analytics data.
    total_views = analytics_data['user_views'].get(username, 0)
    return jsonify({"total_views": total_views}), 200


@app.route('/api/user/<username>/likes', methods=['GET'])
def get_user_likes(username):
    if username not in users:
        return jsonify({"message": "User not found"}), 404

    # In a real system, fetch the total like count for the user from analytics data.
    total_likes = analytics_data['user_likes'].get(username, 0)
    return jsonify({"total_likes": total_likes}), 200


if __name__ == '__main__':
    app.run(debug=True)

from uuid import uuid4

# Placeholder databases
users = {}
videos = {}
video_tags = {}
video_categories = {}
video_comments = {}
video_versions = {}
video_analytics = {}
user_engagement = {}
video_monetization = {}


# Video Upload
def generate_unique_video_id():
    return str(uuid4())


def save_video_info_to_database(video_info):
    video_id = video_info['video_id']
    videos[video_id] = video_info


def upload_video(user_id, video_title, video_file, privacy_settings):
    video_id = generate_unique_video_id()
    video_info = {
        'user_id': user_id,
        'video_title': video_title,
        'video_id': video_id,
        'privacy_settings': privacy_settings,
        'video_file_url': 'https://example.com/videos/' + video_id + '.mp4'
    }
    save_video_info_to_database(video_info)
    return video_info


# Privacy Control
def update_video_privacy_in_database(video_id, privacy_settings):
    videos[video_id]['privacy_settings'] = privacy_settings


# Video Management
def add_tags_to_video_in_database(video_id, tags):
    video_tags[video_id] = tags


def categorize_video_in_database(video_id, category):
    video_categories[video_id] = category


def search_videos_in_database(query):
    results = []
    for video_id, video_info in videos.items():
        if query.lower() in video_info['video_title'].lower():
            results.append(video_info)
    return results


# Video Player
def is_video_public(video_id):
    return videos[video_id]['privacy_settings'] == 'public'


def has_user_access_rights(user_id, video_id):
    # In a real system, this function would check user access rights based on their relationship with the video owner.
    return user_id == videos[video_id]['user_id']


def get_video_file_url(video_id):
    return videos[video_id]['video_file_url']


# Collaboration
def add_comment_to_video_in_database(user_id, video_id, comment):
    if video_id not in video_comments:
        video_comments[video_id] = []
    video_comments[video_id].append({'user_id': user_id, 'comment': comment})


def update_video_file_and_notes_in_database(video_id, version_notes, updated_video_file):
    version_id = generate_unique_video_id()
    video_versions[video_id] = {
        'version_id': version_id,
        'version_notes': version_notes,
        'video_file_url': 'https://example.com/videos/' + video_id + '/versions/' + version_id + '.mp4'
    }


# Analytics
def get_video_analytics_from_database(video_id):
    return video_analytics.get(video_id, {})


def get_user_analytics_from_database(user_id):
    return user_engagement.get(user_id, {})


# Monetization
def add_monetization_to_video_in_database(video_id, monetization_type, price):
    video_monetization[video_id] = {'monetization_type': monetization_type, 'price': price}


def get_video_monetization_options_from_database(video_id):
    return video_monetization.get(video_id, {})


if __name__ == '__main__':
    # Sample usage of the functions
    user_id_1 = 'user1'
    video_info_1 = upload_video(user_id_1, 'Sample Video 1', 'video1.mp4', 'public')
    add_tags_to_video_in_database(video_info_1['video_id'], ['funny', 'cat', 'pets'])
    categorize_video_in_database(video_info_1['video_id'], 'Animals')

    user_id_2 = 'user2'
    video_info_2 = upload_video(user_id_2, 'Sample Video 2', 'video2.mp4', 'private')
    add_tags_to_video_in_database(video_info_2['video_id'], ['tutorial', 'python'])
    categorize_video_in_database(video_info_2['video_id'], 'Education')

    print(search_videos_in_database('sample'))  # Search for videos with 'sample' in the title

    # Simulate video playback based on user access rights
    print(play_video(video_info_1['video_id'], 'user1'))  # Public video, user1 has access
    print(play_video(video_info_1['video_id'], 'user2'))  # Public video, user2 has access
    print(play_video(video_info_2['video_id'], 'user1'))  # Private video, user1 does not have access
    print(play_video(video_info_2['video_id'], 'user2'))  # Private video, user2 has access

    # Simulate collaboration and version control
    add_comment_to_video_in_database('user1', video_info_1['video_id'], 'Nice video!')
    add_comment_to_video_in_database('user2', video_info_1['video_id'], 'Very funny!')

    update_video_file_and_notes_in_database(video_info_1['video_id'], 'Fixed audio issue', 'video1_v2.mp4')

from flask import Flask, request, jsonify

app = Flask(__name__)

users = {}
videos = []
likes = []
comments = []
video_id_counter = 1
like_id_counter = 1
comment_id_counter = 1

# Endpoint for user registration
@app.route('/users', methods=['POST'])
def register_user():
    data = request.get_json()
    user_id = len(users) + 1
    new_user = User(user_id, data['username'], data['password'])
    users[user_id] = new_user
    return jsonify({"message": "User registered successfully", "user_id": user_id}), 201

# Endpoint for user login
@app.route('/users/login', methods=['POST'])
def login_user():
    data = request.get_json()
    for user in users.values():
        if user.username == data['username'] and user.password == data['password']:
            return jsonify({"message": "Login successful", "user_id": user.user_id}), 200
    return jsonify({"message": "Login failed. Invalid credentials"}), 401

# Endpoint for video upload
@app.route('/users/<int:user_id>/videos', methods=['POST'])
def upload_video(user_id):
    user = users.get(user_id)
    if not user:
        return jsonify({"message": "User not found"}), 404

    global video_id_counter
    video_id = video_id_counter
    video_id_counter += 1

    data = request.get_json()
    caption = data.get('caption', '')
    video_url = data.get('video_url')
    timestamp = data.get('timestamp')

    new_video = Video(video_id, user, caption, video_url, timestamp)
    videos.append(new_video)

    return jsonify({"message": "Video uploaded successfully", "video_id": video_id}), 201

# Endpoint for video like
@app.route('/users/<int:user_id>/videos/<int:video_id>/like', methods=['POST'])
def like_video(user_id, video_id):
    user = users.get(user_id)
    if not user:
        return jsonify({"message": "User not found"}), 404

    video = next((v for v in videos if v.video_id == video_id), None)
    if not video:
        return jsonify({"message": "Video not found"}), 404

    global like_id_counter
    like_id = like_id_counter
    like_id_counter += 1

    new_like = Likes(like_id, user, video, timestamp=datetime.now())
    likes.append(new_like)

    return jsonify({"message": "Video liked successfully", "like_id": like_id}), 200

# Endpoint for video comment
@app.route('/users/<int:user_id>/videos/<int:video_id>/comment', methods=['POST'])
def comment_video(user_id, video_id):
    user = users.get(user_id)
    if not user:
        return jsonify({"message": "User not found"}), 404

    video = next((v for v in videos if v.video_id == video_id), None)
    if not video:
        return jsonify({"message": "Video not found"}), 404

    global comment_id_counter
    comment_id = comment_id_counter
    comment_id_counter += 1

    data = request.get_json()
    caption = data.get('caption', '')

    new_comment = Comments(comment_id, user, video, caption, timestamp=datetime.now())
    comments.append(new_comment)

    return jsonify({"message": "Comment added successfully", "comment_id": comment_id}), 200

# Endpoint for user feed
@app.route('/users/<int:user_id>/feed', methods=['GET'])
def get_feed(user_id):
    user = users.get(user_id)
    if not user:
        return jsonify({"message": "User not found"}), 404

    user_feed = [video for video in videos if video.user in user.following]
    user_feed.sort(key=lambda v: v.timestamp, reverse=True)
    feed_data = [{
        "video_id": video.video_id,
        "user_id": video.user.user_id,
        "caption": video.caption,
        "video_url": video.video_url,
        "timestamp": video.timestamp
    } for video in user_feed]

    return jsonify({"feed": feed_data}), 200

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, jsonify, request

app = Flask(__name__)

# In-memory data structures (Replace with a real database in production)
users = {}
transactions = []

# User registration
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    user_id = len(users) + 1
    user = {
        "id": user_id,
        "name": data.get("name"),
        "email": data.get("email"),
        "balance": 0.0
    }
    users[user_id] = user
    return jsonify({"message": "User registered successfully", "user_id": user_id}), 201

# Create a new transaction
@app.route('/api/transactions', methods=['POST'])
def create_transaction():
    data = request.get_json()
    sender_id = data.get("sender_id")
    receiver_id = data.get("receiver_id")
    amount = data.get("amount")
    if sender_id not in users or receiver_id not in users:
        return jsonify({"message": "Invalid sender or receiver ID"}), 404

    if users[sender_id]["balance"] < amount:
        return jsonify({"message": "Insufficient balance"}), 400

    users[sender_id]["balance"] -= amount
    users[receiver_id]["balance"] += amount

    transaction_id = len(transactions) + 1
    transaction = {
        "id": transaction_id,
        "sender_id": sender_id,
        "receiver_id": receiver_id,
        "amount": amount
    }
    transactions.append(transaction)
    return jsonify({"message": "Transaction created successfully", "transaction_id": transaction_id}), 201

# Get user details
@app.route('/api/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    if user_id in users:
        return jsonify(users[user_id]), 200
    return jsonify({"message": "User not found"}), 404

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, jsonify

app = Flask(__name__)

# In-memory data structures (Replace with a real database in production)
users = {}
transactions = []

# Feed Generation Service
@app.route('/api/users/<int:user_id>/feed', methods=['GET'])
def generate_feed(user_id):
    user = users.get(user_id)
    if not user:
        return jsonify({"message": "User not found"}), 404

    # Fetch recent transactions of users that the current user follows
    followed_users = [1, 2, 3]  # Sample list of followed users for demonstration
    recent_transactions = []
    for transaction in transactions:
        if transaction['sender_id'] in followed_users or transaction['receiver_id'] in followed_users:
            recent_transactions.append(transaction)

    # Sort transactions by timestamp (most recent first)
    sorted_transactions = sorted(recent_transactions, key=lambda x: x['timestamp'], reverse=True)

    # Return the feed as a list of transactions
    return jsonify(sorted_transactions), 200

if __name__ == '__main__':
    app.run(debug=True)

class User:
    def __init__(self, user_id, username, email, password):
        self.user_id = user_id
        self.username = username
        self.email = email
        self.password = password
        self.balance = 0.0
        self.transactions = []

    # Getters and setters for attributes

class Transaction:
    def __init__(self, transaction_id, sender_id, receiver_id, amount, timestamp):
        self.transaction_id = transaction_id
        self.sender_id = sender_id
        self.receiver_id = receiver_id
        self.amount = amount
        self.timestamp = timestamp

    # Getters and setters for attributes

class Venmo:
    def __init__(self):
        self.users = {}
        self.transactions = []
        self.transaction_id_counter = 1

    def add_user(self, user):
        self.users[user.user_id] = user

    def get_user_by_id(self, user_id):
        return self.users.get(user_id)

    def create_transaction(self, sender_id, receiver_id, amount):
        sender = self.get_user_by_id(sender_id)
        receiver = self.get_user_by_id(receiver_id)

        if not sender or not receiver:
            print("User not found.")
            return

        if sender.balance < amount:
            print("Insufficient balance.")
            return

        transaction_id = self.transaction_id_counter
        self.transaction_id_counter += 1

        transaction = Transaction(transaction_id, sender_id, receiver_id, amount, datetime.now())
        self.transactions.append(transaction)

        sender.balance -= amount
        receiver.balance += amount

        sender.transactions.append(transaction)
        receiver.transactions.append(transaction)

    def get_user_transactions(self, user_id):
        user = self.get_user_by_id(user_id)
        if not user:
            print("User not found.")
            return []

        return user.transactions

from datetime import datetime

class User:
    def __init__(self, user_id, username, email, password):
        self.user_id = user_id
        self.username = username
        self.email = email
        self.password = password
        self.balance = 0.0
        self.transactions = []

class Transaction:
    def __init__(self, transaction_id, sender_id, receiver_id, amount, timestamp):
        self.transaction_id = transaction_id
        self.sender_id = sender_id
        self.receiver_id = receiver_id
        self.amount = amount
        self.timestamp = timestamp

class Venmo:
    def __init__(self):
        self.users = {}
        self.transactions = []
        self.transaction_id_counter = 1

    def add_user(self, user):
        self.users[user.user_id] = user

    def get_user_by_id(self, user_id):
        return self.users.get(user_id)

    def create_transaction(self, sender_id, receiver_id, amount):
        sender = self.get_user_by_id(sender_id)
        receiver = self.get_user_by_id(receiver_id)

        if not sender or not receiver:
            print("User not found.")
            return

        if sender.balance < amount:
            print("Insufficient balance.")
            return

        transaction_id = self.transaction_id_counter
        self.transaction_id_counter += 1

        transaction = Transaction(transaction_id, sender_id, receiver_id, amount, datetime.now())
        self.transactions.append(transaction)

        sender.balance -= amount
        receiver.balance += amount

        sender.transactions.append(transaction)
        receiver.transactions.append(transaction)

    def get_user_transactions(self, user_id):
        user = self.get_user_by_id(user_id)
        if not user:
            print("User not found.")
            return []

        return user.transactions

# Example Usage
if __name__ == "__main__":
    venmo = Venmo()

    user1 = User(1, "Alice", "[email protected]", "password")
    user2 = User(2, "Bob", "[email protected]", "password")

    venmo.add_user(user1)
    venmo.add_user(user2)

    venmo.create_transaction(1, 2, 50.0)
    venmo.create_transaction(2, 1, 25.0)

    user1_transactions = venmo.get_user_transactions(1)
    print("User 1 Transactions:")
    for transaction in user1_transactions:
        print(f"Transaction ID: {transaction.transaction_id}")
        print(f"Sender ID: {transaction.sender_id}")
        print(f"Receiver ID: {transaction.receiver_id}")
        print(f"Amount: {transaction.amount}")
        print(f"Timestamp: {transaction.timestamp}\n")

User Management API:
POST /api/register: Register a new user with the system.
POST /api/login: Authenticate and log in a user.
GET /api/users/{user_id}: Get user details by their ID.
PUT /api/users/{user_id}: Update user profile details.

Transaction API:
POST /api/transactions: Create a new transaction.
GET /api/transactions/{transaction_id}: Get transaction details by ID.
GET /api/users/{user_id}/transactions: Get all transactions for a specific user.
GET /api/transactions?from={user_id}&to={user_id}: Get all transactions between two users.

Social Interaction API:
POST /api/transactions/{transaction_id}/like: Like a transaction.
POST /api/transactions/{transaction_id}/comment: Add a comment to a transaction.
GET /api/transactions/{transaction_id}/likes: Get all likes for a transaction.
GET /api/transactions/{transaction_id}/comments: Get all comments for a transaction.

Payment API:
POST /api/payments: Initiate a payment to a registered merchant.
GET /api/payments/{payment_id}: Get payment details by ID.

from flask import Flask, request, jsonify

app = Flask(__name__)

# In-memory data structures (Replace with a real database in production)
users = {}
transactions = {}
likes = {}
comments = {}

# User registration
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    user_id = len(users) + 1
    user = {
        "id": user_id,
        "name": data.get("name"),
        "email": data.get("email"),
        "password": data.get("password")  # In a real system, hash the password before saving
    }
    users[user_id] = user
    return jsonify({"message": "User registered successfully", "user_id": user_id}), 201

# User login
@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    email = data.get("email")
    password = data.get("password")
    for user in users.values():
        if user["email"] == email and user["password"] == password:
            return jsonify({"message": "Login successful", "user_id": user["id"]}), 200
    return jsonify({"message": "Invalid credentials"}), 401

# Create a new transaction
@app.route('/api/transactions', methods=['POST'])
def create_transaction():
    data = request.get_json()
    sender_id = data.get("sender_id")
    receiver_id = data.get("receiver_id")
    amount = data.get("amount")
    transaction_id = len(transactions) + 1
    transaction = {
        "id": transaction_id,
        "sender_id": sender_id,
        "receiver_id": receiver_id,
        "amount": amount
    }
    transactions[transaction_id] = transaction
    return jsonify({"message": "Transaction created successfully", "transaction_id": transaction_id}), 201

# Like a transaction
@app.route('/api/transactions/<int:transaction_id>/like', methods=['POST'])
def like_transaction(transaction_id):
    data = request.get_json()
    user_id = data.get("user_id")
    likes_list = likes.get(transaction_id, [])
    likes_list.append(user_id)
    likes[transaction_id] = likes_list
    return jsonify({"message": "Transaction liked successfully"}), 200

# Add a comment to a transaction
@app.route('/api/transactions/<int:transaction_id>/comment', methods=['POST'])
def add_comment(transaction_id):
    data = request.get_json()
    user_id = data.get("user_id")
    comment = data.get("comment")
    comments_list = comments.get(transaction_id, [])
    comments_list.append({"user_id": user_id, "comment": comment})
    comments[transaction_id] = comments_list
    return jsonify({"message": "Comment added successfully"}), 200

# Get all transactions for a user
@app.route('/api/users/<int:user_id>/transactions', methods=['GET'])
def get_user_transactions(user_id):
    user_transactions = []
    for transaction in transactions.values():
        if transaction["sender_id"] == user_id or transaction["receiver_id"] == user_id:
            user_transactions.append(transaction)
    return jsonify(user_transactions), 200

# Get all likes for a transaction
@app.route('/api/transactions/<int:transaction_id>/likes', methods=['GET'])
def get_likes(transaction_id):
    likes_list = likes.get(transaction_id, [])
    return jsonify({"likes": likes_list}), 200

# Get all comments for a transaction
@app.route('/api/transactions/<int:transaction_id>/comments', methods=['GET'])
def get_comments(transaction_id):
    comments_list = comments.get(transaction_id, [])
    return jsonify({"comments": comments_list}), 200

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, jsonify, request

app = Flask(__name__)

# In-memory data structures (Replace with a real database in production)
users = {}
transactions = []
likes = {}
comments = {}

class VenmoTransaction:
    def __init__(self, sender_id, receiver_id, amount):
        self.sender_id = sender_id
        self.receiver_id = receiver_id
        self.amount = amount

    def process_transaction(self):
        # Implement logic to process the payment transaction here
        # For example, deduct the amount from the sender's balance and add it to the receiver's balance
        sender_balance = users[self.sender_id]["balance"]
        receiver_balance = users[self.receiver_id]["balance"]
        if sender_balance >= self.amount:
            users[self.sender_id]["balance"] -= self.amount
            users[self.receiver_id]["balance"] += self.amount
            return True
        else:
            return False

class VenmoSocialFeed:
    def __init__(self):
        self.transactions = []

    def add_transaction(self, transaction):
        # Implement logic to add a transaction to the social feed
        self.transactions.append(transaction)

    def get_feed(self):
        # Implement logic to retrieve the social feed
        # You can filter transactions based on the user's friends or privacy settings
        return self.transactions

def split_payment(amount, num_people):
    # Implement logic to split the payment among multiple people
    # Calculate the share per person and return the split amount
    return amount / num_people

class VenmoInstantTransfer:
    def __init__(self, user_id, balance):
        self.user_id = user_id
        self.balance = balance

    def transfer_to_bank(self, amount):
        # Implement logic for instant bank transfer
        # Deduct the amount from the Venmo balance and transfer it to the linked bank account
        if self.balance >= amount:
            self.balance -= amount
            return True
        else:
            return False

    def transfer_to_bank_standard(self, amount):
        # Implement logic for standard bank transfer
        # Deduct the amount from the Venmo balance and initiate the bank transfer (1-3 business days)
        if self.balance >= amount:
            self.balance -= amount
            return True
        else:
            return False

class VenmoMerchantPayment:
    def __init__(self, merchant_id):
        self.merchant_id = merchant_id

    def process_payment(self, amount):
        # Implement logic to process payment to the merchant
        # Deduct the amount from the user's Venmo balance and credit it to the merchant's account
        if users[self.merchant_id]["balance"] >= amount:
            users[self.merchant_id]["balance"] += amount
            return True
        else:
            return False

class VenmoSecurity:
    def __init__(self, encryption_key):
        self.encryption_key = encryption_key

    def encrypt_data(self, data):
        # Implement logic to encrypt user data using the encryption key
        # You can use libraries like cryptography to handle encryption
        return data

    def authenticate_user(self, user_id, password):
        # Implement logic to authenticate the user using their credentials
        # You can compare the provided password with the stored hashed password in the database
        return users.get(user_id) and users[user_id]["password"] == password


# User Management API
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    user_id = len(users) + 1
    user = {
        "id": user_id,
        "name": data.get("name"),
        "email": data.get("email"),
        "password": data.get("password"),
        "balance": 0.0
    }
    users[user_id] = user
    return jsonify({"message": "User registered successfully", "user_id": user_id}), 201

@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    user_id = data.get("user_id")
    password = data.get("password")
    if VenmoSecurity("").authenticate_user(user_id, password):
        return jsonify({"message": "Login successful", "user_id": user_id}), 200
    else:
        return jsonify({"message": "Invalid credentials"}), 401

# Transaction API
@app.route('/api/transactions', methods=['POST'])
def create_transaction():
    data = request.get_json()
    sender_id = data.get("sender_id")
    receiver_id = data.get("receiver_id")
    amount = data.get("amount")
    transaction = VenmoTransaction(sender_id, receiver_id, amount)
    if transaction.process_transaction():
        transactions.append(transaction)
        return jsonify({"message": "Transaction created successfully"}), 201
    else:
        return jsonify({"message": "Insufficient balance"}), 400

@app.route('/api/transactions/<int:transaction_id>', methods=['GET'])
def get_transaction(transaction_id):
    for transaction in transactions:
        if transaction.id == transaction_id:
            return jsonify({"transaction_id": transaction_id,
                            "sender_id": transaction.sender_id,
                            "receiver_id": transaction.receiver_id,
                            "amount": transaction.amount}), 200
    return jsonify({"message": "Transaction not found"}), 404

# Social Interaction API
@app.route('/api/transactions/<int:transaction_id>/like', methods=['POST'])
def like_transaction(transaction_id):
    data = request.get_json()
    user_id = data.get("user_id")
    likes_list = likes.get(transaction_id, [])
    likes_list.append(user_id)
    likes[transaction_id] = likes_list
    return jsonify({"message": "Transaction liked successfully"}), 200

@app.route('/api/transactions/<int:transaction_id>/likes', methods=['GET'])
def get_likes(transaction_id):
    likes_list = likes.get(transaction_id, [])
    return jsonify({"likes": likes_list}), 200

@app.route('/api/transactions/<int:transaction_id>/comment', methods=['POST'])
def add_comment(transaction_id):
    data = request.get_json()
    user_id = data.get("user_id")
    comment = data.get("comment")
    comments_list = comments.get(transaction_id, [])
    comments_list.append({"user_id": user_id, "comment": comment})
    comments[transaction_id] = comments_list
    return jsonify({"message": "Comment added successfully"}), 200

@app.route('/api/transactions/<int:transaction_id>/comments', methods=['GET'])
def get_comments(transaction_id):
    comments_list = comments.get(transaction_id, [])
    return jsonify({"comments": comments_list}), 200

# Payment API
@app.route('/api/payments', methods=['POST'])
def initiate_payment():
    data = request.get_json()
    user_id = data.get("user_id")
    amount = data.get("amount")
    transfer_type = data.get("transfer_type")

    user_balance = users.get(user_id, {}).get("balance", 0.0)
    if transfer_type == "instant":
        transfer = VenmoInstantTransfer(user_id, user_balance)
    else:
        transfer = VenmoInstantTransfer(user_id, user_balance)

    if transfer.transfer_to_bank(amount):
        return jsonify({"message": "Payment initiated successfully"}), 200
    else:
        return jsonify({"message": "Insufficient balance"}), 400

@app.route('/api/payments/<int:payment_id>', methods=['GET'])
def get_payment(payment_id):
    # Implement logic to fetch payment details by payment ID
    return jsonify({"payment_id": payment_id, "merchant_id": 1, "amount": 25.0}), 200

if __name__ == '__main__':
    app.run(debug=True)

class PrampSimulation:
    def __init__(self):
        self.total_users = 1000000
        self.daily_active_users = 300000
        self.mock_interviews_per_user_per_day = 2
        self.total_mock_interviews_per_day = self.daily_active_users * self.mock_interviews_per_user_per_day
        self.read_to_write_ratio = 100

    def calculate_storage(self):
        average_mock_interview_size_kb = 100
        total_mock_interviews_created_per_day = self.total_mock_interviews_per_day / self.read_to_write_ratio
        total_storage_per_day_mb = total_mock_interviews_created_per_day * average_mock_interview_size_kb
        total_storage_per_year_gb = total_storage_per_day_mb * 365 / 1024
        total_storage_for_3_years_gb = total_storage_per_year_gb * 3
        return total_storage_for_3_years_gb

    def calculate_requests_per_second(self):
        total_mock_interviews_per_second = self.total_mock_interviews_per_day / (3600 * 24)
        return total_mock_interviews_per_second

if __name__ == "__main__":
    pramp_simulation = PrampSimulation()
    storage_requirement_gb = pramp_simulation.calculate_storage()
    requests_per_second = pramp_simulation.calculate_requests_per_second()

    print("Storage Requirement for 3 years:", storage_requirement_gb, "GB")
    print("Requests Per Second:", requests_per_second)

class User:
    def __init__(self, user_id, username, password):
        self.user_id = user_id
        self.username = username
        self.password = password
        self.following = set()
        self.followers = set()

class Interview:
    def __init__(self, interview_id, interviewee, interviewer, scheduled_time):
        self.interview_id = interview_id
        self.interviewee = interviewee
        self.interviewer = interviewer
        self.scheduled_time = scheduled_time
        self.likes = set()
        self.comments = []

class Pramp:
    def __init__(self):
        self.users = {}
        self.interviews = {}

    def add_user(self, user_id, username, password):
        user = User(user_id, username, password)
        self.users[user_id] = user

    def create_interview(self, interview_id, interviewee_id, interviewer_id, scheduled_time):
        if interviewee_id in self.users and interviewer_id in self.users:
            interviewee = self.users[interviewee_id]
            interviewer = self.users[interviewer_id]
            interview = Interview(interview_id, interviewee, interviewer, scheduled_time)
            self.interviews[interview_id] = interview
            return True
        return False

    def like_interview(self, user_id, interview_id):
        if user_id in self.users and interview_id in self.interviews:
            user = self.users[user_id]
            interview = self.interviews[interview_id]
            interview.likes.add(user)
            return True
        return False

    def comment_on_interview(self, user_id, interview_id, comment_text):
        if user_id in self.users and interview_id in self.interviews:
            user = self.users[user_id]
            interview = self.interviews[interview_id]
            comment = f"{user.username}: {comment_text}"
            interview.comments.append(comment)
            return True
        return False

    def get_feed(self, user_id):
        if user_id in self.users:
            user = self.users[user_id]
            feed = []
            for interview_id, interview in self.interviews.items():
                if interview.interviewee == user or interview.interviewer == user or user in interview.likes:
                    feed.append(interview)
            return feed
        return []

# Example usage
pramp = Pramp()

pramp.add_user("1", "Alice", "password1")
pramp.add_user("2", "Bob", "password2")

pramp.create_interview("100", "1", "2", "2023-07-19 10:00:00")
pramp.create_interview("101", "2", "1", "2023-07-20 15:30:00")

pramp.like_interview("1", "100")
pramp.comment_on_interview("2", "100", "Great interview!")

alice_feed = pramp.get_feed("1")
for interview in alice_feed:
    print(f"Interview ID: {interview.interview_id}")
    print(f"Scheduled Time: {interview.scheduled_time}")
    print(f"Likes: {len(interview.likes)}")
    print(f"Comments: {', '.join(interview.comments)}")
    print()

1. User Management Endpoints:

a. User Registration:

Endpoint: /api/register
Method: POST
Payload: {"username": "example_user", "email": "[email protected]", "password": "example_password"}
Description: Allows users to register and create an account.
b. User Login:

Endpoint: /api/login
Method: POST
Payload: {"email": "[email protected]", "password": "example_password"}
Description: Authenticates users and returns a JWT (JSON Web Token) for subsequent API calls.
c. Fetch User Details:

Endpoint: /api/user/{user_id}
Method: GET
Description: Retrieves user details such as username, email, and preferences.
2. Interview Session Endpoints:

a. Start Interview Session:

Endpoint: /api/interview/start
Method: POST
Payload: {"interviewee_id": 123, "interviewer_id": 456, "question_id": 789}
Description: Initiates a new interview session, linking an interviewee, interviewer, and a chosen question.
b. Submit Interview Feedback:

Endpoint: /api/interview/{interview_id}/feedback
Method: POST
Payload: {"feedback": "Great performance!"}
Description: Allows interviewees and interviewers to submit feedback for a completed interview session.
c. Get User Interviews:

Endpoint: /api/user/{user_id}/interviews
Method: GET
Description: Retrieves a list of interview sessions for a specific user, including past and upcoming sessions.

Question Bank Endpoints:

a. Fetch Random Question:

Endpoint: /api/question/random
Method: GET
Description: Returns a random interview question from the question bank.
b. Fetch Question Details:

Endpoint: /api/question/{question_id}
Method: GET
Description: Retrieves the details of a specific interview question, including problem statement and suggested solution.

from flask import Flask, request, jsonify
import jwt
import datetime

app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key'

# Temporary storage for demo purposes (replace with a proper database)
users = {}
interviews = {}
question_bank = {}

# Helper function to generate JWT
def generate_token(user_id):
    payload = {
        'user_id': user_id,
        'exp': datetime.datetime.utcnow() + datetime.timedelta(minutes=30)  # Token expiry time
    }
    return jwt.encode(payload, app.config['SECRET_KEY'], algorithm='HS256')

# Middleware to validate JWT token for secure endpoints
def verify_token(func):
    def wrapper(*args, **kwargs):
        token = request.headers.get('Authorization')
        if not token:
            return jsonify({'message': 'Token is missing!'}), 401
        try:
            payload = jwt.decode(token, app.config['SECRET_KEY'], algorithms=['HS256'])
            user_id = payload['user_id']
            kwargs['user_id'] = user_id
            return func(*args, **kwargs)
        except jwt.ExpiredSignatureError:
            return jsonify({'message': 'Token has expired!'}), 401
        except jwt.InvalidTokenError:
            return jsonify({'message': 'Invalid token!'}), 401

    wrapper.__name__ = func.__name__
    return wrapper

# User Management Endpoints
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    # Your code to validate and store the user details in the database
    user_id = len(users) + 1  # For demo, assign a unique user_id (replace with database-generated IDs)
    users[user_id] = data
    return jsonify({'message': 'User registered successfully!', 'user_id': user_id})

@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    # Your code to validate user credentials and generate a JWT
    user = next((user for user in users.values() if user['email'] == data['email']), None)
    if user and user['password'] == data['password']:
        token = generate_token(user_id)
        return jsonify({'token': token})
    return jsonify({'message': 'Invalid credentials!'}), 401

@app.route('/api/user/<int:user_id>', methods=['GET'])
@verify_token
def get_user_details(user_id):
    # Your code to retrieve user details from the database
    user_details = users.get(user_id)
    if user_details:
        return jsonify(user_details)
    else:
        return jsonify({'message': 'User not found!'}), 404

# Interview Session Endpoints
@app.route('/api/interview/start', methods=['POST'])
@verify_token
def start_interview(user_id):
    data = request.get_json()
    # Your code to create a new interview session and store it in the database
    interview_id = len(interviews) + 1  # For demo, assign a unique interview_id (replace with database-generated IDs)
    interview = {
        'interview_id': interview_id,
        'interviewee_id': data['interviewee_id'],
        'interviewer_id': data['interviewer_id'],
        'question_id': data['question_id']
    }
    interviews[interview_id] = interview
    return jsonify({'message': 'Interview started successfully!', 'interview_id': interview_id})

@app.route('/api/interview/<int:interview_id>/feedback', methods=['POST'])
@verify_token
def submit_feedback(user_id, interview_id):
    data = request.get_json()
    # Your code to submit interview feedback and update the database
    interview = interviews.get(interview_id)
    if interview:
        interview['feedback'] = data['feedback']
        return jsonify({'message': 'Feedback submitted successfully!'})
    else:
        return jsonify({'message': 'Interview not found!'}), 404

@app.route('/api/user/<int:user_id>/interviews', methods=['GET'])
@verify_token
def get_user_interviews(user_id):
    # Your code to retrieve interview sessions for a specific user from the database
    user_interviews = [interview for interview in interviews.values() if
                       interview['interviewee_id'] == user_id or interview['interviewer_id'] == user_id]
    return jsonify(user_interviews)

# Question Bank Endpoints
@app.route('/api/question/random', methods=['GET'])
def get_random_question():
    # Your code to fetch a random question from the question bank
    random_question = None  # Replace with actual implementation
    return jsonify(random_question)

@app.route('/api/question/<int:question_id>', methods=['GET'])
def get_question_details(question_id):
    # Your code to fetch question details by ID from the question bank
    question_details = question_bank.get(question_id)
    if question_details:
        return jsonify(question_details)
    else:
        return jsonify({'message': 'Question not found!'}), 404

if __name__ == '__main__':
    app.run(debug=True)

from flask import Flask, request, jsonify
import jwt
import datetime

app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key'

# Temporary storage for demo purposes (replace with a proper database)
users = {}
interviews = {}
question_bank = {}

# Helper function to generate JWT
def generate_token(user_id):
    payload = {
        'user_id': user_id,
        'exp': datetime.datetime.utcnow() + datetime.timedelta(minutes=30)  # Token expiry time
    }
    return jwt.encode(payload, app.config['SECRET_KEY'], algorithm='HS256')

# Middleware to validate JWT token for secure endpoints
def verify_token(func):
    def wrapper(*args, **kwargs):
        token = request.headers.get('Authorization')
        if not token:
            return jsonify({'message': 'Token is missing!'}), 401
        try:
            payload = jwt.decode(token, app.config['SECRET_KEY'], algorithms=['HS256'])
            user_id = payload['user_id']
            kwargs['user_id'] = user_id
            return func(*args, **kwargs)
        except jwt.ExpiredSignatureError:
            return jsonify({'message': 'Token has expired!'}), 401
        except jwt.InvalidTokenError:
            return jsonify({'message': 'Invalid token!'}), 401

    wrapper.__name__ = func.__name__
    return wrapper

# User Management Endpoints
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    # Your code to validate and store the user details in the database
    user_id = len(users) + 1  # For demo, assign a unique user_id (replace with database-generated IDs)
    users[user_id] = data
    return jsonify({'message': 'User registered successfully!', 'user_id': user_id})

@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    # Your code to validate user credentials and generate a JWT
    user = next((user for user in users.values() if user['email'] == data['email']), None)
    if user and user['password'] == data['password']:
        token = generate_token(user_id)
        return jsonify({'token': token})
    return jsonify({'message': 'Invalid credentials!'}), 401

@app.route('/api/user/<int:user_id>', methods=['GET'])
@verify_token
def get_user_details(user_id):
    # Your code to retrieve user details from the database
    user_details = users.get(user_id)
    if user_details:
        return jsonify(user_details)
    else:
        return jsonify({'message': 'User not found!'}), 404

# Interview Session Endpoints
@app.route('/api/interview/start', methods=['POST'])
@verify_token
def start_interview(user_id):
    data = request.get_json()
    # Your code to create a new interview session and store it in the database
    interview_id = len(interviews) + 1  # For demo, assign a unique interview_id (replace with database-generated IDs)
    interview = {
        'interview_id': interview_id,
        'interviewee_id': data['interviewee_id'],
        'interviewer_id': data['interviewer_id'],
        'question_id': data['question_id']
    }
    interviews[interview_id] = interview
    return jsonify({'message': 'Interview started successfully!', 'interview_id': interview_id})

@app.route('/api/interview/<int:interview_id>/feedback', methods=['POST'])
@verify_token
def submit_feedback(user_id, interview_id):
    data = request.get_json()
    # Your code to submit interview feedback and update the database
    interview = interviews.get(interview_id)
    if interview:
        interview['feedback'] = data['feedback']
        return jsonify({'message': 'Feedback submitted successfully!'})
    else:
        return jsonify({'message': 'Interview not found!'}), 404

@app.route('/api/user/<int:user_id>/interviews', methods=['GET'])
@verify_token
def get_user_interviews(user_id):
    # Your code to retrieve interview sessions for a specific user from the database
    user_interviews = [interview for interview in interviews.values() if
                       interview['interviewee_id'] == user_id or interview['interviewer_id'] == user_id]
    return jsonify(user_interviews)

# Question Bank Endpoints
@app.route('/api/question/random', methods=['GET'])
def get_random_question():
    # Your code to fetch a random question from the question bank
    random_question = None  # Replace with actual implementation
    return jsonify(random_question)

@app.route('/api/question/<int:question_id>', methods=['GET'])
def get_question_details(question_id):
    # Your code to fetch question details by ID from the question bank
    question_details = question_bank.get(question_id)
    if question_details:
        return jsonify(question_details)
    else:
        return jsonify({'message': 'Question not found!'}), 404

if __name__ == '__main__':
    app.run(debug=True)

# Sample code for interview matching (using a basic algorithm)
def match_interviewees(interviewees, interviewers):
    matched_sessions = []
    for interviewer in interviewers:
        for interviewee in interviewees:
            # Your algorithm to match interviewees based on expertise, availability, and preferred languages
            if interviewer['expertise'] == interviewee['expertise'] and interviewer['availability'] and interviewee['availability']:
                matched_sessions.append({'interviewer': interviewer['name'], 'interviewee': interviewee['name']})
                interviewee['availability'] = False  # Mark interviewee as unavailable after matching
                break
    return matched_sessions

# Sample data for interviewees and interviewers
interviewees = [
    {'name': 'Alice', 'expertise': 'Python', 'availability': True},
    {'name': 'Bob', 'expertise': 'Java', 'availability': True},
    {'name': 'Charlie', 'expertise': 'C++', 'availability': True}
]

interviewers = [
    {'name': 'Interviewer1', 'expertise': 'Python', 'availability': True},
    {'name': 'Interviewer2', 'expertise': 'Java', 'availability': True},
]

matched_sessions = match_interviewees(interviewees, interviewers)
print("Matched Sessions:")
for session in matched_sessions:
    print(f"Interviewer: {session['interviewer']}, Interviewee: {session['interviewee']}")

# Sample code for live video calls (using a simulated function)
def initiate_video_call(participant_1, participant_2):
    # Your code to initiate a live video call between two participants
    print(f"Initiating a live video call between {participant_1} and {participant_2}")

# Sample usage of the function
initiate_video_call("Interviewer1", "Alice")

# Sample code for collaborative coding environment (using a simulated function)
def collaborative_coding(editor_session):
    # Your code to enable collaborative coding between interviewees in real-time
    print(f"Collaborative coding session started for {editor_session}")

# Sample usage of the function
collaborative_coding("Interview Session 1")

# Sample code for interviewer feedback
def submit_feedback(participant, feedback):
    # Your code to allow participants to submit feedback after each session
    print(f"Feedback from {participant}: {feedback}")

# Sample usage of the function
submit_feedback("Interviewer1", "Good communication skills and problem-solving approach.")

# Sample code for the question bank (using a basic data structure)
class QuestionBank:
    def __init__(self):
        self.questions = []

    def add_question(self, question):
        self.questions.append(question)

    def get_random_question(self):
        # Your code to retrieve a random question from the bank
        import random
        if self.questions:
            return random.choice(self.questions)
        else:
            return None

# Sample usage of the question bank
question_bank = QuestionBank()
question_bank.add_question("Implement a binary search algorithm.")
question_bank.add_question("Reverse a linked list.")
question_bank.add_question("Find the first non-repeated character in a string.")
random_question = question_bank.get_random_question()
print(f"Random question: {random_question}")

class AppleMaps:
    def __init__(self):
        self.total_users = 500_000_000
        self.daily_active_users = 150_000_000
        self.map_searches_per_user_per_day = 5
        self.map_updates_per_day = self.daily_active_users * self.map_searches_per_user_per_day
        self.read_write_ratio = 100

    def calculate_storage(self):
        map_update_size_kb = 10
        storage_per_day_kb = self.map_updates_per_day * map_update_size_kb
        storage_per_day_tb = storage_per_day_kb / (1024 * 1024)  # Convert KB to TB
        storage_per_year_tb = storage_per_day_tb * 365
        storage_for_3_years_pb = storage_per_year_tb * 3
        return storage_per_day_tb, storage_for_3_years_pb

    def calculate_requests_per_second(self):
        map_search_requests_per_user_per_second = 3
        requests_per_second = self.daily_active_users * map_search_requests_per_user_per_second
        return requests_per_second


# Create an instance of AppleMaps
apple_maps = AppleMaps()

# Calculate storage requirements
storage_per_day, storage_for_3_years = apple_maps.calculate_storage()
print(f"Storage per Day: {storage_per_day:.2f} TB")
print(f"Storage for 3 Years: {storage_for_3_years:.2f} PB")

# Calculate requests per second
requests_per_second = apple_maps.calculate_requests_per_second()
print(f"Requests per Second: {requests_per_second}")

import requests

class AppleMapsFeedService:
    def __init__(self, user_id, access_token):
        self.user_id = user_id
        self.access_token = access_token
        self.base_url = 'https://api.applemaps.com/'

    def fetch_user_feed(self):
        # Define the endpoint for fetching the user's feed
        feed_endpoint = f'{self.base_url}users/{self.user_id}/feed'
        # Send a GET request to the feed endpoint with the access token
        headers = {'Authorization': f'Bearer {self.access_token}'}
        response = requests.get(feed_endpoint, headers=headers)
        # Check the response status code
        if response.status_code == 200:
            return response.json()
        else:
            return None

    def display_user_feed(self):
        feed_data = self.fetch_user_feed()
        if feed_data:
            print("User's Feed:")
            for post in feed_data['posts']:
                print(f"Post ID: {post['id']}")
                print(f"Caption: {post['caption']}")
                print(f"Media URL: {post['media_url']}")
                print(f"Timestamp: {post['timestamp']}")
                print("---")
        else:
            print("Error fetching user's feed.")

# Example usage
user_id = 12345  # Replace with the actual user ID
access_token = '<YOUR_ACCESS_TOKEN_HERE>'
feed_service = AppleMapsFeedService(user_id, access_token)
feed_service.display_user_feed()

class User:
    def __init__(self, user_id, username, password):
        self.user_id = user_id
        self.username = username
        self.password = password
        # Other user attributes (e.g., email, profile_picture)

class Location:
    def __init__(self, location_id, name, latitude, longitude):
        self.location_id = location_id
        self.name = name
        self.latitude = latitude
        self.longitude = longitude
        # Other location attributes (e.g., address, category)

class Post:
    def __init__(self, post_id, user, caption, photo_url, post_timestamp, location):
        self.post_id = post_id
        self.user = user
        self.caption = caption
        self.photo_url = photo_url
        self.post_timestamp = post_timestamp
        self.location = location
        # Other post attributes (e.g., likes_count, comments_count)

class Like:
    def __init__(self, like_id, user, post, timestamp):
        self.like_id = like_id
        self.user = user
        self.post = post
        self.timestamp = timestamp

class Comment:
    def __init__(self, comment_id, user, post, caption, timestamp):
        self.comment_id = comment_id
        self.user = user
        self.post = post
        self.caption = caption
        self.timestamp = timestamp

class Follow:
    def __init__(self, follower, followee):
        self.follower = follower
        self.followee = followee

Geocoding Service API:

geocode_address(address: str) -> Tuple[float, float]: Takes an address as input and returns the latitude and longitude coordinates of the location.
reverse_geocode(lat: float, lon: float) -> str: Takes latitude and longitude as input and returns the address corresponding to the coordinates.

Routing Service API:

get_directions(start: Tuple[float, float], end: Tuple[float, float]) -> List[Tuple[float, float]]: Takes the start and end coordinates and returns a list of intermediate coordinates representing the optimized route.

Traffic Service API:

get_traffic_updates(start: Tuple[float, float], end: Tuple[float, float]) -> Dict[str, Any]: Takes start and end coordinates and returns real-time traffic updates along the route, including traffic conditions, delays, and alternative routes.

Place Search API:

search_places(query: str) -> List[Dict[str, Any]]: Takes a query (e.g., restaurant, gas station) and returns a list of places matching the query, along with their details (name, address, ratings, etc.).

from typing import List, Tuple, Dict, Any

class GeocodingService:
    def geocode_address(self, address: str) -> Tuple[float, float]:
        # Implementation to call backend geocoding service and get latitude and longitude
        # Mock implementation for demonstration purposes
        latitude, longitude = 37.7749, -122.4194
        return latitude, longitude

    def reverse_geocode(self, lat: float, lon: float) -> str:
        # Implementation to call backend reverse geocoding service and get the address
        # Mock implementation for demonstration purposes
        address = "123 Main Street, San Francisco, CA"
        return address

class RoutingService:
    def get_directions(self, start: Tuple[float, float], end: Tuple[float, float]) -> List[Tuple[float, float]]:
        # Implementation to call backend routing service and get the optimized route
        # Mock implementation for demonstration purposes
        optimized_route = [
            (37.7749, -122.4194),
            (37.7833, -122.4167),
            (37.7933, -122.4067),
            (37.8033, -122.3967),
            # ... Intermediate coordinates ...
            (37.8043, -122.4051),
            (37.8083, -122.4094)
        ]
        return optimized_route

class TrafficService:
    def get_traffic_updates(self, start: Tuple[float, float], end: Tuple[float, float]) -> Dict[str, Any]:
        # Implementation to call backend traffic service and get real-time traffic updates
        # Mock implementation for demonstration purposes
        traffic_updates = {
            "status": "OK",
            "delay": 5,  # minutes
            "traffic_conditions": "Moderate",
            "alternative_routes": [
                [
                    (37.7749, -122.4194),
                    (37.7833, -122.4167),
                    # ... Intermediate coordinates ...
                    (37.8083, -122.4094)
                ],
                # ... More alternative routes ...
            ]
        }
        return traffic_updates

class PlaceSearchService:
    def search_places(self, query: str) -> List[Dict[str, Any]]:
        # Implementation to call backend place search service and get matching places
        # Mock implementation for demonstration purposes
        places = [
            {
                "name": "Apple Park",
                "address": "1 Apple Park Way, Cupertino, CA",
                "rating": 4.8,
                "category": "Landmark"
            },
            {
                "name": "Golden Gate Bridge",
                "address": "Golden Gate Bridge, San Francisco, CA",
                "rating": 4.9,
                "category": "Landmark"
            },
            # ... More matching places ...
        ]
        return places

# Example usage of APIs
geocoding_service = GeocodingService()
routing_service = RoutingService()
traffic_service = TrafficService()
place_search_service = PlaceSearchService()

address = "1 Infinite Loop, Cupertino, CA"
latitude, longitude = geocoding_service.geocode_address(address)
print(f"Latitude: {latitude}, Longitude: {longitude}")

lat, lon = 37.7749, -122.4194
address = geocoding_service.reverse_geocode(lat, lon)
print(f"Address: {address}")

start_point = (37.7749, -122.4194)
end_point = (37.8083, -122.4094)
optimized_route = routing_service.get_directions(start_point, end_point)
print(f"Optimized Route: {optimized_route}")

traffic_updates = traffic_service.get_traffic_updates(start_point, end_point)
print(f"Traffic Updates: {traffic_updates}")

query = "restaurant"
places = place_search_service.search_places(query)
print(f"Matching Places: {places}")

from typing import List, Tuple, Dict, Any

class AppleMapsAPI:
    def __init__(self):
        self.geocoding_service = GeocodingService()
        self.routing_service = RoutingService()
        self.traffic_service = TrafficService()
        self.place_search_service = PlaceSearchService()

    def geocode_address(self, address: str) -> Tuple[float, float]:
        return self.geocoding_service.geocode_address(address)

    def reverse_geocode(self, lat: float, lon: float) -> str:
        return self.geocoding_service.reverse_geocode(lat, lon)

    def get_directions(self, start: Tuple[float, float], end: Tuple[float, float]) -> List[Tuple[float, float]]:
        return self.routing_service.get_directions(start, end)

    def get_traffic_updates(self, start: Tuple[float, float], end: Tuple[float, float]) -> Dict[str, Any]:
        return self.traffic_service.get_traffic_updates(start, end)

    def search_places(self, query: str) -> List[Dict[str, Any]]:
        return self.place_search_service.search_places(query)

from typing import List, Tuple, Dict, Any

class NavigationService:
    def get_navigation_instructions(self, start: str, end: str) -> List[str]:
        # Implementation to calculate and provide turn-by-turn navigation instructions
        # Mock implementation for demonstration purposes
        instructions = [
            "Head north on Main Street",
            "Turn left on 2nd Avenue",
            "Continue straight for 2 miles",
            "Turn right on Elm Street",
            "Your destination is on the right"
        ]
        return instructions

class TrafficService:
    def get_traffic_updates(self, location: str) -> str:
        # Implementation to fetch real-time traffic updates for the given location
        # Mock implementation for demonstration purposes
        traffic_status = "Moderate traffic on Main Street. Consider taking an alternative route."
        return traffic_status

class IndoorMapsService:
    def get_indoor_map(self, location: str) -> str:
        # Implementation to fetch the indoor map for the given location
        # Mock implementation for demonstration purposes
        indoor_map = "Indoor map of the mall is not available for this location."
        return indoor_map

class FlyoverService:
    def flyover_city(self, city: str) -> str:
        # Implementation to enable Flyover for the given city
        # Mock implementation for demonstration purposes
        flyover_status = f"Flyover enabled for {city}. Enjoy the 3D experience!"
        return flyover_status

class SiriService:
    def search_location(self, query: str) -> str:
        # Implementation to process Siri voice commands and search for the given location
        # Mock implementation for demonstration purposes
        search_result = f"Searching for '{query}' in Apple Maps..."
        return search_result

    def get_directions(self, start: str, end: str) -> str:
        # Implementation to process Siri voice commands and get directions between start and end
        # Mock implementation for demonstration purposes
        directions = f"Getting directions from '{start}' to '{end}'..."
        return directions

    def perform_action(self, action: str) -> str:
        # Implementation to process Siri voice commands and perform the requested action
        # Mock implementation for demonstration purposes
        action_result = f"Performing '{action}' in Apple Maps..."
        return action_result

# Usage Example:

# Create instances of each service
navigation_service = NavigationService()
traffic_service = TrafficService()
indoor_maps_service = IndoorMapsService()
flyover_service = FlyoverService()
siri_service = SiriService()

# Example usage of each functionality
start_location = "123 Main Street, San Francisco, CA"
end_location = "456 Elm Avenue, Cupertino, CA"

instructions = navigation_service.get_navigation_instructions(start_location, end_location)
print("Navigation Instructions:")
for step, instruction in enumerate(instructions, 1):
    print(f"Step {step}: {instruction}")

traffic_updates = traffic_service.get_traffic_updates(start_location)
print(f"Traffic Updates: {traffic_updates}")

location = "Mall of America"
indoor_map = indoor_maps_service.get_indoor_map(location)
print(f"Indoor Map for '{location}': {indoor_map}")

city_to_flyover = "San Francisco"
flyover_status = flyover_service.flyover_city(city_to_flyover)
print(f"Flyover Status for '{city_to_flyover}': {flyover_status}")

siri_query = "coffee shop"
search_result = siri_service.search_location(siri_query)
print(search_result)

start_location_siri = "Home"
end_location_siri = "Work"
directions_result = siri_service.get_directions(start_location_siri, end_location_siri)
print(directions_result)

action_to_perform = "zoom in"
perform_action_result = siri_service.perform_action(action_to_perform)
print(perform_action_result)