from flask import Flask, request, jsonify
import hashlib

app = Flask(__name__)

# Profile Service
class ProfileService:
    def __init__(self):
        self.users = {}

    def signup(self, username, password):
        hashed_password = hashlib.sha256(password.encode()).hexdigest()
        self.users[username] = hashed_password
        return True

    def login(self, username, password):
        if username in self.users:
            hashed_password = hashlib.sha256(password.encode()).hexdigest()
            if self.users[username] == hashed_password:
                return True
        return False

# Session Service
class SessionService:
    def __init__(self):
        self.sessions = {}

    def get_connection_info(self, session_id):
        if session_id in self.sessions:
            return self.sessions[session_id]
        return None

# Matcher Service
class MatcherService:
    def __init__(self):
        self.matches = {}

    def get_match_details(self, match_id):
        if match_id in self.matches:
            return self.matches[match_id]
        return None

# Recommendation Service
class RecommendationService:
    def get_recommendations(self, user_id):
        # return a collection of recommendations based on the user's preferences
        return [1, 2, 3, 4, 5]

# API Gateway Service
@app.route('/signup', methods=['POST'])
def signup():
    profile_service = ProfileService()
    username = request.json['username']
    password = request.json['password']
    result = profile_service.signup(username, password)
    return jsonify({'result': result})

@app.route('/login', methods=['POST'])
def login():
    profile_service = ProfileService()
    username = request.json['username']
    password = request.json['password']
    result = profile_service.login(username, password)
    return jsonify({'result': result})

@app.route('/session/<session_id>', methods=['GET'])
def get_connection_info(session_id):
    session_service = SessionService()
    result = session_service.get_connection_info(session_id)
    return jsonify({'result': result})

@app.route('/match/<match_id>', methods=['GET'])
def get_match_details(match_id):
    matcher_service = MatcherService()
    result = matcher_service.get_match_details(match_id)
    return jsonify({'result': result})

from flask import Flask, request, jsonify

app = Flask(__name__)

# Matcher Service
class MatcherService:
    def __init__(self):
        self.matches = {}

    def add_match(self, user1_id, user2_id):
        match_id = len(self.matches) + 1
        self.matches[match_id] = (user1_id, user2_id)

    def get_match_details(self, match_id):
        if match_id in self.matches:
            return self.matches[match_id]
        return None

# API Gateway Service
@app.route('/match', methods=['POST'])
def add_match():
    matcher_service = MatcherService()
    user1_id = request.json['user1_id']
    user2_id = request.json['user2_id']
    matcher_service.add_match(user1_id, user2_id)
    return jsonify({'result': 'Match added successfully'})

@app.route('/match/<match_id>', methods=['GET'])
def get_match_details(match_id):
    matcher_service = MatcherService()
    result = matcher_service.get_match_details(match_id)
    return jsonify({'result': result})

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

from flask import Flask, request
from flask_restful import Resource, Api

app = Flask(__name__)
api = Api(app)

class User(Resource):
    def post(self):
        # Create a new user
        json_data = request.get_json(force=True)
        username = json_data['username']
        password = json_data['password']
        # Store the new user in the database
        # ...
        return {'message': 'User created'}, 201

api.add_resource(User, '/user')

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

from flask import Flask, jsonify, request

app = Flask(__name__)

# Endpoint for getting user information
@app.route('/users/<int:user_id>', methods=['GET'])
def get_user(user_id):
    # Code to get user information using user_id
    user = {'name': 'John Doe', 'age': 25, 'bio': 'Hello World!'}
    return jsonify(user)

# Endpoint for liking a user
@app.route('/like', methods=['POST'])
def like_user():
    # Code to like a user using user_id in request body
    user_id = request.json['user_id']
    return jsonify({'message': f'Liked user {user_id}!'})

# Endpoint for disliking a user
@app.route('/dislike', methods=['POST'])
def dislike_user():
    # Code to dislike a user using user_id in request body
    user_id = request.json['user_id']
    return jsonify({'message': f'Disliked user {user_id}!'})

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

import hashlib

# Profile Service
class ProfileService:
    def __init__(self):
        self.users = {}

    def signup(self, username, password):
        hashed_password = hashlib.sha256(password.encode()).hexdigest()
        self.users[username] = hashed_password
        return True

    def login(self, username, password):
        if username in self.users:
            hashed_password = hashlib.sha256(password.encode()).hexdigest()
            if self.users[username] == hashed_password:
                return True
        return False

# Session Service
class SessionService:
    def __init__(self):
        self.sessions = {}

    def get_connection_info(self, session_id):
        if session_id in self.sessions:
            return self.sessions[session_id]
        return None

# Matcher Service
class MatcherService:
    def __init__(self):
        self.matches = {}

    def get_match_details(self, match_id):
        if match_id in self.matches:
            return self.matches[match_id]
        return None

# Recommendation Service
class RecommendationService:
    def get_recommendations(self, user_id):
        # return a collection of recommendations based on the user's preferences
        return [1, 2, 3, 4, 5]

public class ProfileServiceAPI {
    private ProfileService profileService;

    public ProfileServiceAPI(ProfileService profileService) {
        this.profileService = profileService;
    }

    @POST
    @Path("/signup")
    public Response signUp(@FormParam("userId") String userId,
                           @FormParam("username") String username,
                           @FormParam("password") String password) {
        profileService.signUp(userId, username, password);
        return Response.status(Response.Status.CREATED).build();
    }

    @POST
    @Path("/login")
    public Response login(@FormParam("username") String username,
                          @FormParam("password") String password) {
        UserProfile userProfile = profileService.login(username, password);
        if (userProfile != null) {
            String sessionToken = sessionService.createSession(userProfile.getUserId());
            return Response.ok().header("Session-Token", sessionToken).build();
        } else {
            return Response.status(Response.Status.UNAUTHORIZED).build();
        }
    }
}

public class SessionServiceAPI {
    private SessionService sessionService;

    public SessionServiceAPI(SessionService sessionService) {
        this.sessionService = sessionService;
    }

    @GET
    @Path("/session")
    public Response getSession(@HeaderParam("Session-Token") String sessionToken) {
        String userId = sessionService.getUserIdFromSession(sessionToken);
        if (userId != null) {
            return Response.ok(userId).build();
        } else {
            return Response.status(Response.Status.UNAUTHORIZED).build();
        }
    }
}

public class MatcherServiceAPI {
    private MatcherService matcherService;

    public MatcherServiceAPI(MatcherService matcherService) {
        this.matcherService = matcherService;
    }

    @GET
    @Path("/matches/{userId}")
    public Response getMatches(@PathParam("userId") String userId) {
        List<Match> matches = matcherService.getMatches(userId);
        return Response.ok(matches).build();
    }
}

public class RecommendationServiceAPI {
    private RecommendationService recommendationService;

    public RecommendationServiceAPI(RecommendationService recommendationService) {
        this.recommendationService = recommendationService;
    }

    @GET
    @Path("/recommendations/{userId}")
    public Response getRecommendations(@PathParam("userId") String userId) {
        List<Recommendation> recommendations = recommendationService.getRecommendations(userId);
        return Response.ok(recommendations).build();
    }
}

// User Class
class User {
    private String userId;
    private String name;
    private String bio;
    // other user attributes

    public User(String userId, String name, String bio) {
        this.userId = userId;
        this.name = name;
        this.bio = bio;
        // initialize other attributes
    }
}

// Like Class
class Like {
    private User liker;
    private User likee;
    private Date timestamp;

    public Like(User liker, User likee) {
        this.liker = liker;
        this.likee = likee;
        this.timestamp = new Date();
    }

    // Getters and setters
    // ...
}

// Match Class
class Match {
    private User user1;
    private User user2;
    private Date timestamp;

    public Match(User user1, User user2) {
        this.user1 = user1;
        this.user2 = user2;
        this.timestamp = new Date();
    }

    // Getters and setters
    // ...
}

// TinderApp Class
class TinderApp {
    private List<User> users;
    private List<Like> likes;
    private List<Match> matches;

    public TinderApp() {
        users = new ArrayList<>();
        likes = new ArrayList<>();
        matches = new ArrayList<>();
    }

    public void addUser(User user) {
        users.add(user);
    }

    public void addLike(User liker, User likee) {
        Like like = new Like(liker, likee);
        likes.add(like);

        // Check if there's a match
        if (likes.stream().anyMatch(l -> l.getLiker().equals(likee) && l.getLikee().equals(liker))) {
            Match match = new Match(liker, likee);
            matches.add(match);
            // Handle matched user notification or other actions
        }
    }

    // Other methods for handling user interactions, such as messaging, searching, etc.
    // ...
}

// Usage Example
public class Main {
    public static void main(String[] args) {
        TinderApp tinderApp = new TinderApp();

        User user1 = new User("1", "Alice", "I love hiking");
        User user2 = new User("2", "Bob", "I enjoy playing guitar");
        User user3 = new User("3", "Charlie", "I'm a foodie");

        tinderApp.addUser(user1);
        tinderApp.addUser(user2);
        tinderApp.addUser(user3);

        tinderApp.addLike(user1, user2);
        tinderApp.addLike(user2, user1);

        // Check for matches and perform further actions
        // ...
    }
}

import java.util.*;

// User class represents a Tinder user
class User {
    private String userId;
    private String name;
    private String phoneNumber;
    // other user attributes

    public User(String userId, String name, String phoneNumber) {
        this.userId = userId;
        this.name = name;
        this.phoneNumber = phoneNumber;
        // initialize other attributes
    }

    // Getters and setters for attributes
    // ...
}

// NotificationService class handles sending notifications to users
class NotificationService {
    private List<User> users;

    public NotificationService() {
        this.users = new ArrayList<>();
    }

    public void addUser(User user) {
        users.add(user);
    }

    public void sendNotification(String message) {
        for (User user : users) {
            sendSMS(user.getPhoneNumber(), message);
        }
    }

    private void sendSMS(String phoneNumber, String message) {
        // Logic to send SMS notification to the provided phone number
        // ...
    }
}

// Usage Example
public class Main {
    public static void main(String[] args) {
        NotificationService notificationService = new NotificationService();

        User user1 = new User("1", "Alice", "1234567890");
        User user2 = new User("2", "Bob", "9876543210");
        User user3 = new User("3", "Charlie", "5555555555");

        notificationService.addUser(user1);
        notificationService.addUser(user2);
        notificationService.addUser(user3);

        String message = "You have a new match on Tinder!";
        notificationService.sendNotification(message);
    }
}

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time

driver = webdriver.Chrome()

# login to Tinder
driver.get("https://tinder.com")
time.sleep(5)

# Enter your login details here
username = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/main/div[1]/div/div/div/div/header/div/div[2]/div[2]/button/span[2]')
username.click()
time.sleep(2)

username_fb = driver.find_element_by_xpath('//*[@id="modal-manager"]/div/div/div[1]/div/div[3]/span/div[2]/button/span[2]')
username_fb.click()
time.sleep(2)

base_window = driver.window_handles[0]
fb_login_window = driver.window_handles[1]
driver.switch_to.window(fb_login_window)

fb_email = driver.find_element_by_id("email")
fb_email.send_keys("Enter your email id here")
time.sleep(2)

fb_pass = driver.find_element_by_id("pass")
fb_pass.send_keys("Enter your password here")
time.sleep(2)

fb_login = driver.find_element_by_id("loginbutton")
fb_login.click()
time.sleep(2)

driver.switch_to.window(base_window)

# swipe right or left based on the profile compatibility
while True:
    try:
        swipe_right = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/main/div[1]/div/div/div[1]/div/div[2]/div[4]/button')
        swipe_right.click()
        time.sleep(2)
    except:
        try:
            swipe_left = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/main/div[1]/div/div/div[1]/div/div[2]/div[2]/button')
            swipe_left.click()
            time.sleep(2)
        except:
            print("No more profiles to swipe")
            break

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time

driver = webdriver.Chrome()

# login to Tinder
driver.get("https://tinder.com")
time.sleep(5)

# Enter your login details here
username = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/main/div[1]/div/div/div/div/header/div/div[2]/div[2]/button/span[2]')
username.click()
time.sleep(2)

username_fb = driver.find_element_by_xpath('//*[@id="modal-manager"]/div/div/div[1]/div/div[3]/span/div[2]/button/span[2]')
username_fb.click()
time.sleep(2)

base_window = driver.window_handles[0]
fb_login_window = driver.window_handles[1]
driver.switch_to.window(fb_login_window)

fb_email = driver.find_element_by_id("email")
fb_email.send_keys("Enter your email id here")
time.sleep(2)

fb_pass = driver.find_element_by_id("pass")
fb_pass.send_keys("Enter your password here")
time.sleep(2)

fb_login = driver.find_element_by_id("loginbutton")
fb_login.click()
time.sleep(2)

driver.switch_to.window(base_window)

# like or share other users' pictures
while True:
    try:
        like_button = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/div/main/div/div[1]/div[1]/div[2]/div[4]/button')
        like_button.click()
        time.sleep(2)
    except:
        try:
            share_button = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/div/main/div/div[1]/div[1]/div[2]/div[1]/div/div[1]/button')
            share_button.click()
            time.sleep(2)
        except:
            print("No more pictures to like or share")
            break

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time

driver = webdriver.Chrome()

# login to Tinder
driver.get("https://tinder.com")
time.sleep(5)

# Enter your login details here
username = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/main/div[1]/div/div/div/div/header/div/div[2]/div[2]/button/span[2]')
username.click()
time.sleep(2)

username_fb = driver.find_element_by_xpath('//*[@id="modal-manager"]/div/div/div[1]/div/div[3]/span/div[2]/button/span[2]')
username_fb.click()
time.sleep(2)

base_window = driver.window_handles[0]
fb_login_window = driver.window_handles[1]
driver.switch_to.window(fb_login_window)

fb_email = driver.find_element_by_id("email")
fb_email.send_keys("Enter your email id here")
time.sleep(2)

fb_pass = driver.find_element_by_id("pass")
fb_pass.send_keys("Enter your password here")
time.sleep(2)

fb_login = driver.find_element_by_id("loginbutton")
fb_login.click()
time.sleep(2)

driver.switch_to.window(base_window)

# message other users
while True:
    try:
        message_button = driver.find_element_by_xpath('//*[@id="content"]/div/div[1]/div/main/div[1]/div/div/div[1]/div/div[2]/div[2]/button')
        message_button.click()
        time.sleep(2)

        message_field = driver.find_element_by_xpath('//*[@id="chat-text-area"]')
        message_field.send_keys("Enter your message here")
        time.sleep(2)

        send_button = driver.find_element_by_xpath('//*[@id="modal-manager-canvas"]/div/div/div[1]/div/div[3]/div[3]/form/button')
        send_button.click()
        time.sleep(2)

    except:
        print("No more users to message")
        break

import requests

url = "https://api.gotinder.com/v2/recs/core"

headers = {
    "Accept": "application/json",
    "User-Agent": "Tinder/7.5.3 (iPhone; iOS 10.3.2; Scale/2.00)",
    "X-Auth-Token": "Enter your Tinder API token here"
}

params = {
    "locale": "en-US",
    "gender": "female",
    "discoverable": "true",
    "age_min": "18",
    "age_max": "30",
    "distance": "10",
    "lat": "37.7749",
    "lon": "-122.4194"
}

response = requests.get(url, headers=headers, params=params)

if response.status_code == 200:
    data = response.json()
    results = data['data']['results']

    for user in results:
        print(user['name'], user['distance_mi'], user['bio'])

else:
    print("Failed to retrieve nearby users")

import requests

url = "https://api.gotinder.com/v2/matches"

headers = {
    "Accept": "application/json",
    "User-Agent": "Tinder/7.5.3 (iPhone; iOS 10.3.2; Scale/2.00)",
    "X-Auth-Token": "Enter your Tinder API token here"
}

params = {
    "locale": "en-US",
    "count": "10",
    "message": "1",
    "is_tinder_u": "false",
    "gender": "female",
    "query": "Enter the name or ID of the user you want to search for here"
}

response = requests.get(url, headers=headers, params=params)

if response.status_code == 200:
    data = response.json()
    results = data['data']['matches']

    for user in results:
        print(user['person']['name'], user['person']['bio'], user['person']['photos'])

else:
    print("Failed to retrieve search results")

import requests
import time

url = "https://api.gotinder.com/v2/recs/core"

headers = {
    "Accept": "application/json",
    "User-Agent": "Tinder/7.5.3 (iPhone; iOS 10.3.2; Scale/2.00)",
    "X-Auth-Token": "Enter your Tinder API token here"
}

params = {
    "locale": "en-US",
    "gender": "female",
    "discoverable": "true",
    "age_min": "18",
    "age_max": "30",
    "distance": "10",
    "lat": "37.7749",
    "lon": "-122.4194"
}

while True:
    response = requests.get(url, headers=headers, params=params)

    if response.status_code == 200:
        data = response.json()
        results = data['data']['results']

        for user in results:
            if 'shared_interests' in user:
                print("Liking user with shared interests:", user['name'])
                like_url = f"https://api.gotinder.com/like/{user['_id']}"
                requests.get(like_url, headers=headers)
                time.sleep(2)

            elif user['distance_mi'] < 5:
                print("Liking user who is nearby:", user['name'])
                like_url = f"https://api.gotinder.com/like/{user['_id']}"
                requests.get(like_url, headers=headers)
                time.sleep(2)

            else:
                print("Liking user:", user['name'])
                like_url = f"https://api.gotinder.com/like/{user['_id']}"
                requests.get(like_url, headers=headers)
                time.sleep(2)

    else:
        print("Failed to retrieve nearby users")
        break

from flask import Flask, request

app = Flask(__name__)

# User registration
@app.route('/register', methods=['POST'])
def register():
    username = request.form['username']
    password = request.form['password']
    # Process registration logic
    # Save user information to the database
    return 'Registration successful'

# User login
@app.route('/login', methods=['POST'])
def login():
    username = request.form['username']
    password = request.form['password']
    # Process login logic
    # Authenticate user credentials
    return 'Login successful'

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

from geopy.geocoders import Nominatim

# Create a geolocator object
geolocator = Nominatim(user_agent='my_geolocator')

# Get user's location coordinates
def get_user_location(address):
    location = geolocator.geocode(address)
    return location.latitude, location.longitude

# Find nearby users
def find_nearby_users(user_location, max_distance=10):
    # Query the database or API to get user locations
    # Calculate the distance between each user and the given user_location
    # Return the nearby users within the maximum distance
    pass

# Example user preference criteria
user_preferences = {
    'age_min': 18,
    'age_max': 30,
    'distance_max': 10,
    'interests': ['hiking', 'traveling']
}

# Match users based on preferences
def match_users(user, other_users):
    matched_users = []
    for other_user in other_users:
        # Check if other_user meets the user's preferences
        if (
            user_preferences['age_min'] <= other_user.age <= user_preferences['age_max'] and
            calculate_distance(user.location, other_user.location) <= user_preferences['distance_max'] and
            set(user_preferences['interests']).intersection(set(other_user.interests))
        ):
            matched_users.append(other_user)
    return matched_users

import socketio

# Create a Socket.IO server
sio = socketio.Server()

# Handle incoming messages
@sio.on('message')
def handle_message(sid, data):
    # Save the message to the database
    # Handle message delivery to the recipient
    # Emit an event to the recipient's client for real-time updates
    pass

# Handle read receipts
@sio.on('message_read')
def handle_message_read(sid, data):
    # Update the message status in the database
    # Emit an event to the sender's client for real-time updates
    pass

if __name__ == '__main__':
    app = socketio.WSGIApp(sio, app)
    eventlet.wsgi.server(eventlet.listen(('', 5000)), app)

# Example recommendation algorithm
def recommend_matches(user):
    # Query the database to get a list of potential matches
    # Apply collaborative filtering, content-based filtering, or machine learning techniques
    # Return a list of recommended matches for the user
    pass

# Report a user
def report_user(user_id, report_reason):
    # Save the user report in the database
    # Take appropriate actions based on the report, such as reviewing the reported user's activity
    pass

# Block a user
def block_user(user_id):
    # Update the user's block list in the database
    # Prevent any further interaction with the blocked user
    pass

from werkzeug.contrib.cache import SimpleCache
from flask import Flask

app = Flask(__name__)
cache = SimpleCache()

# Caching user profiles
@app.route('/profile/<user_id>')
def get_user_profile(user_id):
    profile = cache.get(user_id)
    if profile is None:
        # Query the database to fetch the user profile
        # Cache the profile for future requests
        cache.set(user_id, profile)
    return profile

import datetime
from flask import Flask, request

app = Flask(__name__)

# Log user activity
@app.before_request
def log_user_activity():
    log_entry = {
        'timestamp': datetime.datetime.now(),
        'ip_address': request.remote_addr,
        'endpoint': request.endpoint,
        'method': request.method
    }
    # Save the log entry to the database or log file
    pass

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

# Like a user
def like_user(user_id):
    # Save the like action in the database
    # Check if the liked user has also liked the current user (mutual like)
    # If there is a mutual like, create a match entry in the database
    pass

# Super like a user
def super_like_user(user_id):
    # Save the super like action in the database
    # Check if the super liked user has also liked the current user (mutual like)
    # If there is a mutual like, create a match entry in the database
    pass

import logging

# Set up logging
logging.basicConfig(filename='app.log', level=logging.ERROR)

# Monitor system health
def monitor_system_health():
    # Check the status of essential components (servers, databases, etc.)
    # Log any errors or issues
    # Send alerts to the system administrators
    pass

from flask import Flask, request, jsonify

app = Flask(__name__)
users = {}  # Dictionary to store user profiles

# Update user profile
@app.route('/profile', methods=['PUT'])
def update_profile():
    username = request.form['username']
    profile = {
        'name': request.form['name'],
        'bio': request.form['bio'],
        'photo': request.form['photo']
    }
    users[username]['profile'] = profile
    return jsonify({'message': 'Profile updated successfully'})

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

from flask import Flask, jsonify

app = Flask(__name__)
users = {}  # Dictionary to store user preferences

# Get recommended matches for a user
@app.route('/recommendations/<username>')
def get_recommendations(username):
    if username not in users:
        return jsonify({'message': 'User not found'}), 404

    # Get user preferences
    user_preferences = users[username]['preferences']

    # Implement recommendation algorithm to get potential matches
    recommended_users = recommend_matches(users[username])

    return jsonify({'recommendations': recommended_users})

def recommend_matches(user):
    # Query the database to get a list of potential matches
    # Apply collaborative filtering, content-based filtering, or machine learning techniques
    # Return a list of recommended matches for the user
    pass

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

from flask import Flask, jsonify, request

app = Flask(__name__)
users = {}  # Dictionary to store user information

# Report a user
@app.route('/report', methods=['POST'])
def report_user():
    reported_user = request.form['username']
    if reported_user not in users:
        return jsonify({'message': 'User not found'}), 404
    report_reason = request.form['reason']
    # Save the report in the database or take appropriate action
    save_report(reported_user, report_reason)
    return jsonify({'message': 'User reported successfully'})

def save_report(username, reason):
    # Save the report entry to the database or take appropriate action
    pass

# Block a user
@app.route('/block', methods=['POST'])
def block_user():
    blocking_user = request.form['username']
    blocked_user = request.form['blocked_user']
    if blocking_user not in users or blocked_user not in users:
        return jsonify({'message': 'User not found'}), 404
    # Update the block list in the database or take appropriate action
    update_block_list(blocking_user, blocked_user)
    return jsonify({'message': 'User blocked successfully'})

def update_block_list(username, blocked_user):
    # Update the block list for the given user in the database or take appropriate action
    pass

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

from flask import Flask, jsonify

app = Flask(__name__)
users = {}  # Dictionary to store user information

# Get user profile
@app.route('/profile/<username>')
def get_user_profile(username):
    if username not in users:
        return jsonify({'message': 'User not found'}), 404
    # Query the database to fetch the user profile
    profile = fetch_user_profile_from_database(username)
    return jsonify({'profile': profile})

def fetch_user_profile_from_database(username):
    # Fetch the user profile from the database
    return users[username]

import time

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

    def add_transaction(self, transaction):
        self.transactions.append(transaction)

    def get_transactions(self, user_id):
        return [transaction for transaction in self.transactions if transaction['user_id'] == user_id]

wallet = CoinbaseWallet()

def simulate_coinbase_wallet():
    for i in range(10_000_000):
        transaction = {
            'user_id': i,
            'amount': 10,
            'timestamp': time.time()
        }
        wallet.add_transaction(transaction)

def get_user_transactions(user_id):
    transactions = wallet.get_transactions(user_id)
    return transactions

# Run the simulation
simulate_coinbase_wallet()

# Example usage
user_id = 123456
transactions = get_user_transactions(user_id)
print(transactions)

class UserService:
    def register_user(self, username, email, password):
        # Logic to register a new user
        user_id = generate_user_id()
        # Save user data to the database
        save_user_data(user_id, username, email, password)
        return user_id

    def login_user(self, email, password):
        # Logic to authenticate and log in a user
        user_id = get_user_id(email)
        if user_id is None:
            return None
        stored_password = get_user_password(user_id)
        if password == stored_password:
            return user_id
        return None

    def update_user_credentials(self, user_id, new_username, new_email, new_password):
        # Logic to update user credentials
        update_user_data(user_id, new_username, new_email, new_password)

    # Additional methods and functionalities specific to user management can be added here

class WalletService:
    def create_wallet(self, user_id, currency):
        # Logic to create a new wallet for a user
        wallet_id = generate_wallet_id()
        # Save wallet data to the database
        save_wallet_data(wallet_id, user_id, currency)
        return wallet_id

    def get_wallet_balance(self, wallet_id):
        # Logic to retrieve the balance of a wallet
        balance = get_wallet_balance_from_database(wallet_id)
        return balance

    def perform_transaction(self, sender_wallet_id, recipient_wallet_id, amount):
        # Logic to perform a transaction between wallets
        sender_balance = get_wallet_balance(sender_wallet_id)
        if sender_balance < amount:
            raise InsufficientFundsException("Insufficient balance in the sender's wallet.")
        # Deduct the amount from the sender's wallet
        update_wallet_balance(sender_wallet_id, sender_balance - amount)
        # Add the amount to the recipient's wallet
        recipient_balance = get_wallet_balance(recipient_wallet_id)
        update_wallet_balance(recipient_wallet_id, recipient_balance + amount)

    # Additional methods and functionalities specific to wallet management can be added here

class TransactionService:
    def get_transaction_details(self, transaction_id):
        # Logic to retrieve the details of a transaction
        transaction_details = get_transaction_details_from_database(transaction_id)
        return transaction_details

    def get_user_transactions(self, user_id):
        # Logic to retrieve all transactions associated with a user
        user_transactions = get_user_transactions_from_database(user_id)
        return user_transactions

class TokenService:
    def add_token(self, token_name, contract_address):
        # Logic to add a new token to the system
        add_token_to_database(token_name, contract_address)

    def remove_token(self, token_name):
        # Logic to remove a token from the system
        remove_token_from_database(token_name)

    def update_token(self, token_name, new_contract_address):
        # Logic to update the contract address of a token
        update_token_address_in_database(token_name, new_contract_address)

    # Additional methods and functionalities specific to token management can be added here

class FeedService:
    def generate_personalized_feed(self, user_id):
        # Logic to generate a personalized feed for a user
        user_followings = get_user_followings(user_id)
        feed_data = []
        for following_id in user_followings:
            following_posts = get_user_posts(following_id)
            feed_data.extend(following_posts)
        return feed_data

    def prioritize_content(self, feed_data):
        # Logic to prioritize content in the feed based on user preferences, transaction history, etc.
        prioritized_feed = prioritize(feed_data)
        return prioritized_feed

    # Additional methods and functionalities specific to feed generation can be added here

class SecurityService:
    def encrypt_data(self, data):
        # Logic to encrypt sensitive data
        encrypted_data = encrypt(data)
        return encrypted_data

    def decrypt_data(self, encrypted_data):
        # Logic to decrypt encrypted data
        decrypted_data = decrypt(encrypted_data)
        return decrypted_data

    def authenticate_user(self, email, password):
        # Logic to authenticate a user
        authenticated_user = authenticate(email, password)
        return authenticated_user

    # Additional methods and functionalities specific to security and authentication can be added here

from flask import Flask, request, jsonify
import uuid

app = Flask(__name__)

# Sample data to be stored in the server
users = {}
wallets = {}
transactions = {}
tokens = {}
feeds = {}
security = {}


# User Management API
@app.route('/users/register', methods=['POST'])
def register_user():
    data = request.get_json()
    user_id = str(uuid.uuid4())
    username = data.get('username')
    email = data.get('email')
    password = data.get('password')
    user = {'username': username, 'email': email, 'password': password}
    users[user_id] = user
    return jsonify(message='User registered successfully', user_id=user_id), 201


@app.route('/users/login', methods=['POST'])
def login_user():
    data = request.get_json()
    email = data.get('email')
    password = data.get('password')
    for user_id, user in users.items():
        if user['email'] == email and user['password'] == password:
            return jsonify(message='User logged in successfully', user_id=user_id), 200
    return jsonify(message='Invalid credentials'), 401


@app.route('/users/update', methods=['PUT'])
def update_user_credentials():
    data = request.get_json()
    user_id = data.get('user_id')
    new_username = data.get('new_username')
    new_email = data.get('new_email')
    new_password = data.get('new_password')
    if user_id in users:
        user = users[user_id]
        user['username'] = new_username if new_username else user['username']
        user['email'] = new_email if new_email else user['email']
        user['password'] = new_password if new_password else user['password']
        return jsonify(message='User credentials updated successfully'), 200
    return jsonify(message='User not found'), 404


# Wallet Management API
@app.route('/wallets/create', methods=['POST'])
def create_wallet():
    data = request.get_json()
    user_id = data.get('user_id')
    currency = data.get('currency')
    wallet_id = str(uuid.uuid4())
    wallet = {'user_id': user_id, 'currency': currency, 'balance': 0}
    wallets[wallet_id] = wallet
    return jsonify(message='Wallet created successfully', wallet_id=wallet_id), 201


@app.route('/wallets/balance', methods=['GET'])
def get_wallet_balance():
    wallet_id = request.args.get('wallet_id')
    if wallet_id in wallets:
        return jsonify(balance=wallets[wallet_id]['balance']), 200
    return jsonify(message='Wallet not found'), 404


@app.route('/wallets/transaction', methods=['POST'])
def perform_transaction():
    data = request.get_json()
    sender_wallet_id = data.get('sender_wallet_id')
    recipient_wallet_id = data.get('recipient_wallet_id')
    amount = data.get('amount')
    if sender_wallet_id in wallets and recipient_wallet_id in wallets:
        sender_wallet = wallets[sender_wallet_id]
        recipient_wallet = wallets[recipient_wallet_id]
        if sender_wallet['balance'] >= amount:
            sender_wallet['balance'] -= amount
            recipient_wallet['balance'] += amount
            transaction_id = str(uuid.uuid4())
            transaction = {'sender_wallet_id': sender_wallet_id,
                           'recipient_wallet_id': recipient_wallet_id, 'amount': amount}
            transactions[transaction_id] = transaction
            return jsonify(message='Transaction successful', transaction_id=transaction_id), 201
        return jsonify(message='Insufficient balance'), 400
    return jsonify(message='Invalid wallet ID'), 404


# Transaction Management API
@app.route('/transactions/details', methods=['GET'])
def get_transaction_details():
    transaction_id = request.args.get('transaction_id')
    if transaction_id in transactions:
        return jsonify(transactions[transaction_id]), 200
    return jsonify(message='Transaction not found'), 404


@app.route('/transactions/user', methods=['GET'])
def get_user_transactions():
    user_id = request.args.get('user_id')
    user_transactions = []
    for transaction_id, transaction in transactions.items():
        if transaction['sender_wallet_id'] == user_id or transaction['recipient_wallet_id'] == user_id:
            user_transactions.append(transaction)
    return jsonify(user_transactions=user_transactions), 200


# Token Management API
@app.route('/tokens/add', methods=['POST'])
def add_token():
    data = request.get_json()
    token_name = data.get('token_name')
    contract_address = data.get('contract_address')
    token_id = str(uuid.uuid4())
    token = {'token_name': token_name, 'contract_address': contract_address}
    tokens[token_id] = token
    return jsonify(message='Token added successfully', token_id=token_id), 201


@app.route('/tokens/remove', methods=['DELETE'])
def remove_token():
    token_id = request.args.get('token_id')
    if token_id in tokens:
        del tokens[token_id]
        return jsonify(message='Token removed successfully'), 200
    return jsonify(message='Token not found'), 404


@app.route('/tokens/update', methods=['PUT'])
def update_token():
    data = request.get_json()
    token_id = data.get('token_id')
    new_contract_address = data.get('new_contract_address')
    if token_id in tokens:
        tokens[token_id]['contract_address'] = new_contract_address
        return jsonify(message='Token updated successfully'), 200
    return jsonify(message='Token not found'), 404


# Feed Management API
@app.route('/feed/personalized', methods=['GET'])
def generate_personalized_feed():
    user_id = request.args.get('user_id')
    if user_id in feeds:
        return jsonify(feed_data=feeds[user_id]), 200
    return jsonify(message='User feed not found'), 404


@app.route('/feed/prioritized', methods=['GET'])
def prioritize_content():
    feed_data = request.args.get('feed_data')
    # Logic to prioritize content based on user preferences
   The complete code for the Coinbase Wallet system is as follows:

from flask import Flask, request, jsonify
import uuid

app = Flask(__name__)

# Sample data to be stored in the server
users = {}
wallets = {}
transactions = {}
tokens = {}
feeds = {}
security = {}


# User Management API
@app.route('/users/register', methods=['POST'])
def register_user():
    data = request.get_json()
    user_id = str(uuid.uuid4())
    username = data.get('username')
    email = data.get('email')
    password = data.get('password')
    user = {'username': username, 'email': email, 'password': password}
    users[user_id] = user
    return jsonify(message='User registered successfully', user_id=user_id), 201


@app.route('/users/login', methods=['POST'])
def login_user():
    data = request.get_json()
    email = data.get('email')
    password = data.get('password')
    for user_id, user in users.items():
        if user['email'] == email and user['password'] == password:
            return jsonify(message='User logged in successfully', user_id=user_id), 200
    return jsonify(message='Invalid credentials'), 401


@app.route('/users/update', methods=['PUT'])
def update_user_credentials():
    data = request.get_json()
    user_id = data.get('user_id')
    new_username = data.get('new_username')
    new_email = data.get('new_email')
    new_password = data.get('new_password')
    if user_id in users:
        user = users[user_id]
        user['username'] = new_username if new_username else user['username']
        user['email'] = new_email if new_email else user['email']
        user['password'] = new_password if new_password else user['password']
        return jsonify(message='User credentials updated successfully'), 200
    return jsonify(message='User not found'), 404


# Wallet Management API
@app.route('/wallets/create', methods=['POST'])
def create_wallet():
    data = request.get_json()
    user_id = data.get('user_id')
    currency = data.get('currency')
    wallet_id = str(uuid.uuid4())
    wallet = {'user_id': user_id, 'currency': currency, 'balance': 0}
    wallets[wallet_id] = wallet
    return jsonify(message='Wallet created successfully', wallet_id=wallet_id), 201


@app.route('/wallets/balance', methods=['GET'])
def get_wallet_balance():
    wallet_id = request.args.get('wallet_id')
    if wallet_id in wallets:
        return jsonify(balance=wallets[wallet_id]['balance']), 200
    return jsonify(message='Wallet not found'), 404


@app.route('/wallets/transaction', methods=['POST'])
def perform_transaction():
    data = request.get_json()
    sender_wallet_id = data.get('sender_wallet_id')
    recipient_wallet_id = data.get('recipient_wallet_id')
    amount = data.get('amount')
    if sender_wallet_id in wallets and recipient_wallet_id in wallets:
        sender_wallet = wallets[sender_wallet_id]
        recipient_wallet = wallets[recipient_wallet_id]
        if sender_wallet['balance'] >= amount:
            sender_wallet['balance'] -= amount
            recipient_wallet['balance'] += amount
            transaction_id = str(uuid.uuid4())
            transaction = {'sender_wallet_id': sender_wallet_id,
                           'recipient_wallet_id': recipient_wallet_id, 'amount': amount}
            transactions[transaction_id] = transaction
            return jsonify(message='Transaction successful', transaction_id=transaction_id), 201
        return jsonify(message='Insufficient balance'), 400
    return jsonify(message='Invalid wallet ID'), 404


# Transaction Management API
@app.route('/transactions/details', methods=['GET'])
def get_transaction_details():
    transaction_id = request.args.get('transaction_id')
    if transaction_id in transactions:
        return jsonify(transactions[transaction_id]), 200
    return jsonify(message='Transaction not found'), 404


@app.route('/transactions/user', methods=['GET'])
def get_user_transactions():
    user_id = request.args.get('user_id')
    user_transactions = []
    for transaction_id, transaction in transactions.items():
        if transaction['sender_wallet_id'] == user_id or transaction['recipient_wallet_id'] == user_id:
            user_transactions.append(transaction)
    return jsonify(user_transactions=user_transactions), 200


# Token Management API
@app.route('/tokens/add', methods=['POST'])
def add_token():
    data = request.get_json()
    token_name = data.get('token_name')
    contract_address = data.get('contract_address')
    token_id = str(uuid.uuid4())
    token = {'token_name': token_name, 'contract_address': contract_address}
    tokens[token_id] = token
    return jsonify(message='Token added successfully', token_id=token_id), 201


@app.route('/tokens/remove', methods=['DELETE'])
def remove_token():
    token_id = request.args.get('token_id')
    if token_id in tokens:
        del tokens[token_id]
        return jsonify(message='Token removed successfully'), 200
    return jsonify(message='Token not found'), 404


@app.route('/tokens/update', methods=['PUT'])
def update_token():
    data = request.get_json()
    token_id = data.get('token_id')
    new_contract_address = data.get('new_contract_address')
    if token_id in tokens:
        tokens[token_id]['contract_address'] = new_contract_address
        return jsonify(message='Token updated successfully'), 200
    return jsonify(message='Token not found'), 404


# Feed Management API
@app.route('/feed/personalized', methods=['GET'])
def generate_personalized_feed():
    user_id = request.args.get('user_id')
    if user_id in feeds:
        return jsonify(feed_data=feeds[user_id]), 200
    return jsonify(message='User feed not found'), 404


@app.route('/feed/prioritized', methods=['GET'])
def prioritize_content():
    feed_data = request.args.get('feed_data')
    # Logic to prioritize content based on user preferences
    prioritized_feed = prioritize_feed(feed_data)
    return jsonify(prioritized_feed=prioritized_feed), 200


# Security API
@app.route('/security/encrypt', methods=['POST'])
def encrypt_data():
    data = request.get_json()
    data_to_encrypt = data.get('data')
    encryption_key = data.get('encryption_key')
    # Logic to encrypt data using encryption_key
    encrypted_data = encrypt(data_to_encrypt, encryption_key)
    return jsonify(encrypted_data=encrypted_data), 200


@app.route('/security/decrypt', methods=['POST'])
def decrypt_data():
    data = request.get_json()
    encrypted_data = data.get('encrypted_data')
    encryption_key = data.get('encryption_key')
    # Logic to decrypt encrypted_data using encryption_key
    decrypted_data = decrypt(encrypted_data, encryption_key)
    return jsonify(decrypted_data=decrypted_data), 200


@app.route('/security/authenticate', methods=['POST'])
def authenticate_user():
    data = request.get_json()
    email = data.get('email')
    password = data.get('password')
    for user_id, user in users.items():
        if user['email'] == email and user['password'] == password:
            return jsonify(authenticated_user=user_id), 200


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

class User:
    def __init__(self, userId, username, email, password):
        self.userId = userId
        self.username = username
        self.email = email
        self.password = password
        self.walletId = None

    # Additional methods and functionalities specific to user management can be added here


class Wallet:
    def __init__(self, walletId, userId, currency):
        self.walletId = walletId
        self.userId = userId
        self.currency = currency
        self.balance = 0

    # Additional methods and functionalities specific to wallet management can be added here


class Transaction:
    def __init__(self, transactionId, senderWalletId, recipientWalletId, amount):
        self.transactionId = transactionId
        self.senderWalletId = senderWalletId
        self.recipientWalletId = recipientWalletId
        self.amount = amount

    # Additional methods and functionalities specific to transaction handling can be added here


class Token:
    def __init__(self, tokenId, tokenName, contractAddress):
        self.tokenId = tokenId
        self.tokenName = tokenName
        self.contractAddress = contractAddress

    # Additional methods and functionalities specific to token management can be added here


class Feed:
    def __init__(self, userId, feedData):
        self.userId = userId
        self.feedData = feedData

    # Additional methods and functionalities specific to feed generation can be added here


class Security:
    def __init__(self, encryptionKey):
        self.encryptionKey = encryptionKey

    # Additional methods and functionalities specific to security and authentication can be added here


# Usage example:
user1 = User("1", "Alice", "[email protected]", "password")
wallet1 = Wallet("W1", user1.userId, "USD")
user1.walletId = wallet1.walletId

user2 = User("2", "Bob", "[email protected]", "password")
wallet2 = Wallet("W2", user2.userId, "BTC")
user2.walletId = wallet2.walletId

transaction1 = Transaction("T1", wallet1.walletId, wallet2.walletId, 10)

token1 = Token("TK1", "Ethereum", "0x123456789abcdef")

feed1 = Feed(user1.userId, ["Post 1", "Post 2", "Post 3"])

security1 = Security("encryption_key")

# Additional code for interacting with the objects can be added here

User Authentication API:
Endpoint: /auth
Methods: POST
Description: Handles user registration, login, and authentication processes.
Request Body:

{
  "email": "[email protected]",
  "password": "password123"
}
Response:
{
  "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEyMzQ1NiIsImVtYWlsIjoidXNlckBleGFtcGxlLmNvbSIsImlhdCI6MTYzMjE0OTg3OSwiZXhwIjoxNjMyMTUzMDc5fQ.abc123def456ghi789jkl"
}

Wallet Management API:
Endpoint: /wallets
Methods: GET, POST
Description: Allows users to create, retrieve, and manage their wallets.
Request Header:
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEyMzQ1NiIsImVtYWlsIjoidXNlckBleGFtcGxlLmNvbSIsImlhdCI6MTYzMjE0OTg3OSwiZXhwIjoxNjMyMTUzMDc5fQ.abc123def456ghi789jkl
Response (GET):
[  {    "wallet_id": "12345",    "currency": "BTC",    "balance": 2.5  },  {    "wallet_id": "67890",    "currency": "ETH",    "balance": 10.2  }]
Response (POST):
{
  "wallet_id": "24680",
  "currency": "LTC",
  "balance": 5.7
}

Transaction API:
Endpoint: /transactions
Methods: GET, POST
Description: Facilitates the execution and retrieval of transactions.
Request Header:
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpZCI6IjEyMzQ1NiIsImVtYWlsIjoidXNlckBleGFtcGxlLmNvbSIsImlhdCI6MTYzMjE0OTg3OSwiZXhwIjoxNjMyMTUzMDc5fQ.abc123def456ghi789jkl
Request Body (POST):

{
  "sender_wallet_id": "12345",
  "recipient_wallet_id": "67890",
  "amount": 1.0,
  "currency": "BTC"
}
Response (GET):
[  {    "transaction_id": "abc123",    "sender_wallet_id": "12345",    "recipient_wallet_id": "67890",    "amount": 1.0,    "currency": "BTC",    "timestamp": "2023-07-08 10:30:45"  },  {    "transaction_id": "def456",    "sender_wallet_id": "67890",    "recipient_wallet_id": "12345",    "amount": 0.5,    "currency": "ETH",    "timestamp": "2023-07-07 15:20:10"  }]

class Wallet:
    def __init__(self):
        self.currencies = {}

    def add_currency(self, currency_name):
        self.currencies[currency_name] = 0

    def update_balance(self, currency_name, amount):
        self.currencies[currency_name] += amount

    def get_balance(self, currency_name):
        return self.currencies.get(currency_name, 0)

# Example Usage:
wallet = Wallet()
wallet.add_currency("BTC")
wallet.add_currency("ETH")
wallet.update_balance("BTC", 1.5)
wallet.update_balance("ETH", 5.2)
print(wallet.get_balance("BTC"))  # Output: 1.5
print(wallet.get_balance("ETH"))  # Output: 5.2

import hashlib

def encrypt_data(data):
    # Apply encryption algorithm (e.g., hashing)
    hashed_data = hashlib.sha256(data.encode()).hexdigest()
    return hashed_data

def decrypt_data(encrypted_data):
    # Decrypt encrypted data (if applicable)
    decrypted_data = encrypted_data
    return decrypted_data

# Example Usage:
data = "sensitive information"
encrypted_data = encrypt_data(data)
print(encrypted_data)
decrypted_data = decrypt_data(encrypted_data)
print(decrypted_data)

class NonCustodialWallet:
    def __init__(self, private_key):
        self.private_key = private_key

    def sign_transaction(self, transaction_data):
        # Use the private key to sign the transaction
        signature = sign(transaction_data, self.private_key)
        return signature

    def execute_transaction(self, transaction_data, signature):
        # Verify the signature and execute the transaction
        if verify_signature(transaction_data, signature):
            execute(transaction_data)
            return True
        return False

# Example Usage:
private_key = "abcd1234"  # Example private key
wallet = NonCustodialWallet(private_key)
transaction_data = "Transaction data"
signature = wallet.sign_transaction(transaction_data)
success = wallet.execute_transaction(transaction_data, signature)
print(success)  # Output: True or False

class DAppBrowser:
    def __init__(self):
        self.current_dapp = None

    def load_dapp(self, dapp_url):
        # Load the specified DApp URL
        self.current_dapp = dapp_url

    def interact_with_dapp(self, interaction_data):
        # Perform interactions with the loaded DApp
        if self.current_dapp is not None:
            response = interact(self.current_dapp, interaction_data)
            return response
        return None

# Example Usage:
dapp_browser = DAppBrowser()
dapp_browser.load_dapp("https://example-dapp.com")
response = dapp_browser.interact_with_dapp("data")
print(response)

class TokenSwapper:
    def __init__(self):
        self.supported_tokens = {}

    def add_token(self, token_name, contract_address):
        self.supported_tokens[token_name] = contract_address

    def swap_tokens(self, sender_wallet, recipient_wallet, sender_token, recipient_token, amount):
        # Perform the token swapping logic
        if self.supported_tokens.get(sender_token) is not None and self.supported_tokens.get(recipient_token) is not None:
            # Deduct sender's token and add recipient's token
            sender_wallet.update_balance(sender_token, -amount)
            recipient_wallet.update_balance(recipient_token, amount)
            return True
        return False

# Example Usage:
wallet_A = Wallet()
wallet_B = Wallet()
token_swapper = TokenSwapper()
token_swapper.add_token("ETH", "0x12345")  # Example token address
token_swapper.add_token("LTC", "0x67890")  # Example token address
wallet_A.update_balance("ETH", 10)
wallet_B.update_balance("LTC", 5)
success = token_swapper.swap_tokens(wallet_A, wallet_B, "ETH", "LTC", 2)
print(success)  # Output: True
print(wallet_A.get_balance("ETH"))  # Output: 8
print(wallet_B.get_balance("LTC"))  # Output: 7

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

class Post:
    def __init__(self, post_id, user, caption):
        self.post_id = post_id
        self.user = user
        self.caption = caption
        # Other post attributes

class TripCom:
    def __init__(self):
        self.users = {}
        self.posts = []

    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_post(self, user_id, caption):
        user = self.get_user_by_id(user_id)

        if user is None:
            print("User not found")
            return

        post_id = len(self.posts) + 1
        post = Post(post_id, user, caption)
        self.posts.append(post)

    def get_feed(self, user_id):
        user_feed = []
        for post in self.posts:
            if post.user.user_id == user_id:
                user_feed.append(post)
        return user_feed

# Usage Example
trip_com = TripCom()

user1 = User("1", "Alice", "password")
user2 = User("2", "Bob", "password")

trip_com.add_user(user1)
trip_com.add_user(user2)

trip_com.create_post("1", "Hello, world!")

user1_feed = trip_com.get_feed("1")
for post in user1_feed:
    print("User:", post.user.username)
    print("Caption:", post.caption)
    print()

from flask import Flask, jsonify, request

app = Flask(__name__)

users = {}

# Endpoint for creating a new user
@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = data['user_id']
    username = data['username']
    password = data['password']
    user = User(user_id, username, password)
    users[user_id] = user
    return jsonify({'message': 'User created successfully'}), 201

# Endpoint for retrieving a user by user_id
@app.route('/users/<user_id>', methods=['GET'])
def get_user(user_id):
    user = users.get(user_id)
    if user:
        return jsonify(user.__dict__), 200
    else:
        return jsonify({'message': 'User not found'}), 404

# Endpoint for creating a new post
@app.route('/posts', methods=['POST'])
def create_post():
    data = request.get_json()
    user_id = data['user_id']
    caption = data['caption']
    user = users.get(user_id)
    if user:
        post_id = len(user.posts) + 1
        post = Post(post_id, user, caption)
        user.posts.append(post)
        return jsonify({'message': 'Post created successfully'}), 200
    else:
        return jsonify({'message': 'User not found'}), 404

# Endpoint for retrieving the feed of a user
@app.route('/users/<user_id>/feed', methods=['GET'])
def get_feed(user_id):
    user = users.get(user_id)
    if user:
        user_feed = []
        for post in user.posts:
            user_feed.append(post.__dict__)
        return jsonify({'feed': user_feed}), 200
    else:
        return jsonify({'message': 'User not found'}), 404

Flight Search API:

Endpoint: /flight/search
Method: GET
Parameters:
origin: The origin airport code.
destination: The destination airport code.
departure_date: The desired departure date.
return_date: The desired return date (optional for one-way flights).
passengers: The number of passengers.
Response: JSON object containing a list of available flights with relevant details such as airline, departure/arrival times, duration, and prices.
Hotel Search API:

Endpoint: /hotel/search
Method: GET
Parameters:
location: The desired location for the hotel.
check_in_date: The desired check-in date.
check_out_date: The desired check-out date.
guests: The number of guests.
Response: JSON object containing a list of available hotels with details such as name, location, amenities, room types, and prices.
Booking API:

Endpoint: /booking/create
Method: POST
Parameters:
user_id: The ID of the user making the booking.
flight_id: The ID of the selected flight.
hotel_id: The ID of the selected hotel.
passengers: List of passenger details (name, age, etc.).
Response: JSON object confirming the successful creation of the booking with a unique booking ID.
Payment API:

Endpoint: /payment/process
Method: POST
Parameters:
booking_id: The ID of the booking to be processed.
payment_details: Payment information (credit card details, etc.).
Response: JSON object indicating the success or failure of the payment transaction.
Review API:

Endpoint: /review/submit
Method: POST
Parameters:
user_id: The ID of the user submitting the review.
booking_id: The ID of the associated booking.
flight_review: Review and rating for the flight (optional).
hotel_review: Review and rating for the hotel (optional).
Response: JSON object confirming the successful submission of the review.

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/flight/search', methods=['GET'])
def search_flights():
    origin = request.args.get('origin')
    destination = request.args.get('destination')
    departure_date = request.args.get('departure_date')
    return_date = request.args.get('return_date')
    passengers = int(request.args.get('passengers'))

    # Perform flight search based on parameters

    flights = [
        {
            'airline': 'Airline A',
            'departure_time': '10:00',
            'arrival_time': '12:00',
            'duration': '2h',
            'price': 200.00
        },
        {
            'airline': 'Airline B',
            'departure_time': '14:00',
            'arrival_time': '16:30',
            'duration': '2h 30m',
            'price': 180.00
        }
    ]

    response = {
        'flights': flights
    }

    return jsonify(response)

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

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/hotel/search', methods=['GET'])
def search_hotels():
    location = request.args.get('location')
    check_in_date = request.args.get('check_in_date')
    check_out_date = request.args.get('check_out_date')
    guests = int(request.args.get('guests'))

    # Perform hotel search based on parameters

    hotels = [
        {
            'name': 'Hotel A',
            'location': 'City X',
            'amenities': ['Wi-Fi', 'Swimming pool'],
            'room_types': ['Standard', 'Deluxe'],
            'prices': {'Standard': 100.00, 'Deluxe': 150.00}
        },
        {
            'name': 'Hotel B',
            'location': 'City Y',
            'amenities': ['Wi-Fi', 'Gym', 'Spa'],
            'room_types': ['Standard', 'Executive', 'Suite'],
            'prices': {'Standard': 120.00, 'Executive': 180.00, 'Suite': 250.00}
        }
    ]

    response = {
        'hotels': hotels
    }

    return jsonify(response)

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

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/booking/create', methods=['POST'])
def create_booking():
    data = request.get_json()

    user_id = data['user_id']
    flight_id = data['flight_id']
    hotel_id = data['hotel_id']
    passengers = data['passengers']

    # Create the booking in the system and generate a unique booking ID

    booking_id = 'ABC123'

    response = {
        'booking_id': booking_id,
        'message': 'Booking created successfully.'
    }

    return jsonify(response)

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

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/payment/process', methods=['POST'])
def process_payment():
    data = request.get_json()

    booking_id = data['booking_id']
    payment_details = data['payment_details']

    # Process the payment transaction and update the booking status

    success = True

    response = {
        'booking_id': booking_id,
        'success': success,
        'message': 'Payment processed successfully.'
    }

    return jsonify(response)

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

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/review/submit', methods=['POST'])
def submit_review():
    data = request.get_json()

    user_id = data['user_id']
    booking_id = data['booking_id']
    flight_review = data.get('flight_review')
    hotel_review = data.get('hotel_review')

    # Save the review in the system and update relevant entities

    response = {
        'booking_id': booking_id,
        'message': 'Review submitted successfully.'
    }

    return jsonify(response)

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

Flight Search API:

Endpoint: /flights/search
Method: GET
Parameters: departure_city, arrival_city, departure_date, passengers
Functionality: Searches and retrieves flight options based on the provided parameters.

Hotel Search API:

Endpoint: /hotels/search
Method: GET
Parameters: city, check-in_date, check-out_date, guests
Functionality: Searches and retrieves hotel options based on the provided parameters.

Booking API:

Endpoint: /bookings
Method: POST
Parameters: user_id, flight_id, hotel_id, date
Functionality: Creates a new booking for a user with the specified flight and hotel.

Payment API:

Endpoint: /bookings/{booking_id}/payment
Method: POST
Parameters: payment_info
Functionality: Processes the payment for the specified booking.

Recommendation API:

Endpoint: /recommendations
Method: GET
Parameters: user_id
Functionality: Retrieves personalized travel recommendations for the specified user.

Review API:

Endpoint: /reviews
Method: POST
Parameters: user_id, flight_id (optional), hotel_id (optional), rating, comment
Functionality: Creates a new review with the specified rating and comment for a flight or hotel.

Customer Support API:

Endpoint: /support
Method: POST
Parameters: user_id, query
Functionality: Handles customer support queries and provides assistance to users.

class TripCom:
    def search_flights(self, origin, destination, departure_date, return_date, passengers):
        # Perform flight search based on parameters
        flights = [
            {
                'airline': 'Airline A',
                'departure_time': '10:00',
                'arrival_time': '12:00',
                'duration': '2h',
                'price': 200.00
            },
            {
                'airline': 'Airline B',
                'departure_time': '14:00',
                'arrival_time': '16:30',
                'duration': '2h 30m',
                'price': 180.00
            }
        ]
        return flights

    def search_hotels(self, location, check_in_date, check_out_date, guests):
        # Perform hotel search based on parameters
        hotels = [
            {
                'name': 'Hotel A',
                'location': 'City X',
                'amenities': ['Wi-Fi', 'Swimming pool'],
                'room_types': ['Standard', 'Deluxe'],
                'prices': {'Standard': 100.00, 'Deluxe': 150.00}
            },
            {
                'name': 'Hotel B',
                'location': 'City Y',
                'amenities': ['Wi-Fi', 'Gym', 'Spa'],
                'room_types': ['Standard', 'Executive', 'Suite'],
                'prices': {'Standard': 120.00, 'Executive': 180.00, 'Suite': 250.00}
            }
        ]
        return hotels

# Example usage
trip_com = TripCom()
flights = trip_com.search_flights('New York', 'London', '2023-07-15', '2023-07-20', 2)
hotels = trip_com.search_hotels('London', '2023-07-15', '2023-07-20', 2)
print(flights)
print(hotels)

class TripCom:
    def create_booking(self, user_id, flight_id, hotel_id, passengers):
        # Create the booking in the system and generate a unique booking ID
        booking_id = 'ABC123'
        return booking_id

    def process_payment(self, booking_id, payment_details):
        # Process the payment transaction and update the booking status
        success = True
        return success

# Example usage
trip_com = TripCom()
booking_id = trip_com.create_booking('user123', 'flight456', 'hotel789', 2)
payment_success = trip_com.process_payment(booking_id, {'credit_card': '1234-5678-9012-3456'})
print(booking_id)
print(payment_success)

class TripCom:
    def get_travel_recommendations(self, user_id):
        # Retrieve personalized travel recommendations for the user
        recommendations = [
            'Visit historical landmarks in Rome.',
            'Explore the vibrant nightlife in Tokyo.',
            'Relax on the beautiful beaches of Bali.'
        ]
        return recommendations

# Example usage
trip_com = TripCom()
recommendations = trip_com.get_travel_recommendations('user123')
print(recommendations)

class TripCom:
    def get_reviews(self, flight_id=None, hotel_id=None):
        # Retrieve reviews and ratings based on flight ID or hotel ID
        if flight_id:
            reviews = [
                {'user': 'user1', 'rating': 4, 'comment': 'Great flight experience.'},
                {'user': 'user2', 'rating': 5, 'comment': 'Excellent service.'}
            ]
        elif hotel_id:
            reviews = [
                {'user': 'user1', 'rating': 4, 'comment': 'Comfortable stay with friendly staff.'},
                {'user': 'user2', 'rating': 3, 'comment': 'Average amenities.'}
            ]
        else:
            reviews = []
        return reviews

# Example usage
trip_com = TripCom()
flight_reviews = trip_com.get_reviews(flight_id='flight456')
hotel_reviews = trip_com.get_reviews(hotel_id='hotel789')
print(flight_reviews)
print(hotel_reviews)

class TripCom:
    def get_customer_support(self, user_id):
        # Retrieve customer support information for the user
        support_info = {
            'phone': '+123456789',
            'email': '[email protected]',
            'chat': 'https://trip.com/chat'
        }
        return support_info

# Example usage
trip_com = TripCom()
support_info = trip_com.get_customer_support('user123')
print(support_info)

class LikeService:
    def like_pin(self, user_id, pin_id):
        # Logic to like a pin
        pin = Pin.query.get(pin_id)
        if not pin:
            raise Exception("Pin not found")

        like = Like.query.filter_by(user_id=user_id, pin_id=pin_id).first()
        if like:
            raise Exception("User already liked this pin")

        like = Like(user_id=user_id, pin_id=pin_id)
        db.session.add(like)
        db.session.commit()

        pin.like_count += 1
        db.session.commit()

    def unlike_pin(self, user_id, pin_id):
        # Logic to unlike a pin
        like = Like.query.filter_by(user_id=user_id, pin_id=pin_id).first()
        if not like:
            raise Exception("User has not liked this pin")

        db.session.delete(like)
        db.session.commit()

        pin = Pin.query.get(pin_id)
        pin.like_count -= 1
        db.session.commit()

class FollowService:
    def follow_user(self, follower_id, following_id):
        # Logic to follow a user
        if follower_id == following_id:
            raise Exception("Cannot follow oneself")

        follow = Follow.query.filter_by(follower_id=follower_id, following_id=following_id).first()
        if follow:
            raise Exception("User is already following this user")

        follow = Follow(follower_id=follower_id, following_id=following_id)
        db.session.add(follow)
        db.session.commit()

    def unfollow_user(self, follower_id, following_id):
        # Logic to unfollow a user
        follow = Follow.query.filter_by(follower_id=follower_id, following_id=following_id).first()
        if not follow:
            raise Exception("User is not following this user")

        db.session.delete(follow)
        db.session.commit()

class CommentService:
    def add_comment(self, user_id, pin_id, comment_text):
        # Logic to add a comment
        pin = Pin.query.get(pin_id)
        if not pin:
            raise Exception("Pin not found")

        comment = Comment(user_id=user_id, pin_id=pin_id, comment_text=comment_text)
        db.session.add(comment)
        db.session.commit()

    def reply_to_comment(self, user_id, comment_id, reply_text):
        # Logic to reply to a comment
        comment = Comment.query.get(comment_id)
        if not comment:
            raise Exception("Comment not found")

        reply = Reply(user_id=user_id, comment_id=comment_id, reply_text=reply_text)
        db.session.add(reply)
        db.session.commit()

class PinService:
    def create_pin(self, user_id, image_url, caption):
        # Logic to create a pin
        pin = Pin(user_id=user_id, image_url=image_url, caption=caption)
        db.session.add(pin)
        db.session.commit()

    def get_pin(self, pin_id):
        # Logic to retrieve a pin by pin_id
        pin = Pin.query.get(pin_id)
        if not pin:
            raise Exception("Pin not found")

        return pin

class FeedGenerationService:
    def generate_user_feed(self, user_id):
        # Logic to generate a user's feed
        followed_users = Follow.query.filter_by(follower_id=user_id).all()
        followed_user_ids = [follow.following_id for follow in followed_users]

        pins = Pin.query.filter(Pin.user_id.in_(followed_user_ids)).order_by(Pin.timestamp.desc()).limit(50).all()

        return pins

class User:
    def __init__(self, user_id, username, password):
        self.user_id = user_id
        self.username = username
        self.password = password
        # other user attributes

class Pin:
    def __init__(self, pin_id, user, image_url, caption):
        self.pin_id = pin_id
        self.user = user
        self.image_url = image_url
        self.caption = caption
        # other pin attributes

class Pinterest:
    def __init__(self):
        self.users = {}
        self.pins = []

    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_pin(self, user_id, image_url, caption):
        user = self.get_user_by_id(user_id)
        if not user:
            return "User not found"

        pin_id = len(self.pins) + 1
        pin = Pin(pin_id, user, image_url, caption)
        self.pins.append(pin)

        # Additional logic to update user's feed, notify followers, etc.

    def get_user_pins(self, user_id):
        user_pins = []
        for pin in self.pins:
            if pin.user.user_id == user_id:
                user_pins.append(pin)

        return user_pins

    # Additional methods for handling likes, comments, follow/unfollow, etc.

from flask import Flask, request

app = Flask(__name__)
pinterest = Pinterest()

# User API
@app.route("/users", methods=["POST"])
def create_user():
    data = request.get_json()
    user_id = data.get("user_id")
    username = data.get("username")
    password = data.get("password")
    user = User(user_id, username, password)
    pinterest.add_user(user)
    return {"message": "User created successfully"}, 201

@app.route("/users/<user_id>", methods=["GET"])
def get_user(user_id):
    user = pinterest.get_user_by_id(user_id)
    if user:
        return {
            "user_id": user.user_id,
            "username": user.username,
            "password": user.password,
            # other user attributes
        }, 200
    else:
        return {"message": "User not found"}, 404

# Pin API
@app.route("/pins", methods=["POST"])
def create_pin():
    data = request.get_json()
    user_id = data.get("user_id")
    image_url = data.get("image_url")
    caption = data.get("caption")
    pinterest.create_pin(user_id, image_url, caption)
    return {"message": "Pin created successfully"}, 201

@app.route("/users/<user_id>/pins", methods=["GET"])
def get_user_pins(user_id):
    user_pins = pinterest.get_user_pins(user_id)
    pin_data = []
    for pin in user_pins:
        pin_data.append({
            "pin_id": pin.pin_id,
            "user_id": pin.user.user_id,
            "image_url": pin.image_url,
            "caption": pin.caption,
            # other pin attributes
        })
    return {"pins": pin_data}, 200

# Feed API
@app.route("/users/<user_id>/feed", methods=["GET"])
def get_user_feed(user_id):
    # Logic to generate and retrieve the user's personalized feed
    # ...
    return {"message": "Feed retrieved successfully"}, 200

@app.route('/api/pins', methods=['POST'])
def create_pin():
    # Authenticate the user making the request
    user = authenticate_user(request)

    # Parse the request parameters
    title = request.form.get('title')
    description = request.form.get('description')
    image_url = request.form.get('image_url')
    board_id = request.form.get('board_id')

    # Validate the request parameters
    if not all([title, description, image_url, board_id]):
        return jsonify({'error': 'Missing required parameters'}), 400

    # Create a new pin object
    pin = Pin(title=title, description=description, image_url=image_url, board_id=board_id, user_id=user.id)
    db.session.add(pin)
    db.session.commit()

    # Return the created pin as the response
    return jsonify({'pin': pin.serialize()}), 201

@app.route('/api/boards', methods=['POST'])
def create_board():
    # Authenticate the user making the request
    user = authenticate_user(request)

    # Parse the request parameters
    name = request.form.get('name')
    description = request.form.get('description')

    # Validate the request parameters
    if not all([name, description]):
        return jsonify({'error': 'Missing required parameters'}), 400

    # Create a new board object
    board = Board(name=name, description=description, user_id=user.id)
    db.session.add(board)
    db.session.commit()

    # Return the created board as the response
    return jsonify({'board': board.serialize()}), 201

@app.route('/api/boards/<board_id>', methods=['GET'])
def get_board(board_id):
    # Authenticate the user making the request
    user = authenticate_user(request)

    # Retrieve the board by ID
    board = Board.query.filter_by(id=board_id, user_id=user.id).first()

    # Check if the board exists
    if not board:
        return jsonify({'error': 'Board not found'}), 404

    # Return the board as the response
    return jsonify({'board': board.serialize()})

@app.route('/api/users/<user_id>/follow', methods=['POST'])
def follow_user(user_id):
    # Authenticate the user making the request
    user = authenticate_user(request)

    # Check if the user being followed exists
    followed_user = User.query.filter_by(id=user_id).first()
    if not followed_user:
        return jsonify({'error': 'User not found'}), 404

    # Follow the user
    user.followed_users.append(followed_user)
    db.session.commit()

    # Return a success message as the response
    return jsonify({'message': 'User followed successfully'})

@app.route('/api/pins/<pin_id>/like', methods=['POST'])
def like_pin(pin_id):
    # Authenticate the user making the request
    user = authenticate_user(request)

    # Check if the pin being liked exists
    pin = Pin.query.filter_by(id=pin_id).first()
    if not pin:
        return jsonify({'error': 'Pin not found'}), 404

    # Like the pin
    user.liked_pins.append(pin)
    db.session.commit()

    # Return a success message as the response
    return jsonify({'message': 'Pin liked successfully'})

class Pin:
    def __init__(self, title, image_url, user_id):
        self.title = title
        self.image_url = image_url
        self.user_id = user_id

class Pinboard:
    def __init__(self, name, user_id):
        self.name = name
        self.user_id = user_id
        self.pins = []

    def add_pin(self, pin):
        self.pins.append(pin)

# Example usage:
user_id = 1
pin = Pin("Beautiful Landscape", "https://example.com/image.jpg", user_id)
pinboard = Pinboard("Travel Ideas", user_id)
pinboard.add_pin(pin)

class Board:
    def __init__(self, name, user_id):
        self.name = name
        self.user_id = user_id
        self.pins = []

    def add_pin(self, pin):
        self.pins.append(pin)

# Example usage:
user_id = 1
board = Board("Home Decor", user_id)
board.add_pin(pin)

class Pin:
    # ...

class PinRepository:
    def __init__(self):
        self.pins = []

    def add_pin(self, pin):
        self.pins.append(pin)

    def search_pins_by_keyword(self, keyword):
        return [pin for pin in self.pins if keyword.lower() in pin.title.lower()]

# Example usage:
pin_repository = PinRepository()
pin_repository.add_pin(pin)
keyword = "landscape"
results = pin_repository.search_pins_by_keyword(keyword)

class User:
    def __init__(self, username):
        self.username = username
        self.following = []
        self.liked_pins = []

    def follow_user(self, user):
        self.following.append(user)

    def like_pin(self, pin):
        self.liked_pins.append(pin)

# Example usage:
user1 = User("Alice")
user2 = User("Bob")
user1.follow_user(user2)
user1.like_pin(pin)

class RecommendationEngine:
    def __init__(self, user_repository):
        self.user_repository = user_repository

    def get_related_pins(self, user_id):
        user = self.user_repository.get_user(user_id)
        # Recommendation logic goes here
        return recommended_pins

# Example usage:
user_repository = UserRepository()
recommendation_engine = RecommendationEngine(user_repository)
related_pins = recommendation_engine.get_related_pins(user_id)

from flask import Flask, jsonify, request

app = Flask(__name__)

# Mock database to store transaction and user data
transactions = {}
users = {}

# 1. Initiate Payment API Handler
@app.route('/api/payments/initiate', methods=['POST'])
def initiate_payment():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']
    payment_method = data['payment_method']

    # Simulate payment token generation
    payment_token = f"PAYMENT_{customer_id}_{merchant_id}_{amount}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'payment_method': payment_method,
        'status': 'initiated'
    }

    return jsonify({'payment_token': payment_token}), 200

# 2. Process Payment API Handler
@app.route('/api/payments/process', methods=['POST'])
def process_payment():
    data = request.get_json()
    payment_token = data['payment_token']

    # Check if payment token exists in transactions (validate token)
    if payment_token in transactions:
        transaction = transactions[payment_token]

        # Simulate payment processing
        # For simplicity, assume the payment is successful
        transaction['status'] = 'completed'
        transaction_id = f"TRANS_{transaction['customer_id']}_{transaction['merchant_id']}_{transaction['amount']}"

        return jsonify({'status': 'success', 'transaction_id': transaction_id}), 200
    else:
        return jsonify({'error': 'Invalid payment token.'}), 400

# 3. Get Transaction Status API Handler
@app.route('/api/payments/status', methods=['GET'])
def get_transaction_status():
    transaction_id = request.args.get('transaction_id')

    # Check if the transaction ID exists
    if transaction_id in transactions:
        status = transactions[transaction_id]['status']
        return jsonify({'status': status}), 200
    else:
        return jsonify({'error': 'Transaction not found.'}), 404

# 4. Add User API Handler (for simulation purposes)
@app.route('/api/users', methods=['POST'])
def add_user():
    data = request.get_json()
    user_id = data['user_id']
    user_data = data['user_data']

    # Save the user data to the database
    users[user_id] = user_data

    return jsonify({'message': 'User added successfully.'}), 201

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

Customer:

CustomerID: Integer (Primary Key)
Name: String
Email: String
PaymentMethods: List of PaymentMethod
PaymentMethod:

MethodID: Integer (Primary Key)
Type: String (e.g., credit card, bank account, Amazon Pay balance)
AccountInfo: String (details like credit card number, bank account details, etc.)
Transaction:

TransactionID: Integer (Primary Key)
CustomerID: Integer (Foreign Key referencing Customer)
Amount: Float
Timestamp: DateTime
Status: String (e.g., initiated, completed, refunded)
Refund:

RefundID: Integer (Primary Key)
TransactionID: Integer (Foreign Key referencing Transaction)
Amount: Float
Timestamp: DateTime
Status: String (e.g., initiated, completed)

from flask import Flask, jsonify, request

app = Flask(__name__)

# Mock database to store user and transaction data
users = {}
transactions = {}

# 1. Payment Service
@app.route('/api/payments/process', methods=['POST'])
def process_payment():
    data = request.get_json()
    customer_id = data['customer_id']
    amount = data['amount']
    payment_method = data['payment_method']

    # Simulate payment processing
    transaction_id = len(transactions) + 1
    transactions[transaction_id] = {
        'customer_id': customer_id,
        'amount': amount,
        'payment_method': payment_method,
        'status': 'completed'
    }

    return jsonify({'transaction_id': transaction_id}), 200

# 2. User Service
@app.route('/api/users', methods=['POST'])
def add_user():
    data = request.get_json()
    user_id = len(users) + 1
    users[user_id] = data
    return jsonify({'user_id': user_id}), 201

@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
    else:
        return jsonify({'error': 'User not found.'}), 404

# 3. Transaction Service
@app.route('/api/transactions/<int:transaction_id>', methods=['GET'])
def get_transaction(transaction_id):
    if transaction_id in transactions:
        return jsonify(transactions[transaction_id]), 200
    else:
        return jsonify({'error': 'Transaction not found.'}), 404

# 4. Refund Service
@app.route('/api/transactions/<int:transaction_id>/refund', methods=['POST'])
def refund_transaction(transaction_id):
    if transaction_id in transactions and transactions[transaction_id]['status'] == 'completed':
        data = request.get_json()
        refund_id = len(transactions) + 1
        amount = data['amount']
        refunds[refund_id] = {
            'transaction_id': transaction_id,
            'amount': amount,
            'status': 'completed'
        }
        return jsonify({'refund_id': refund_id}), 200
    else:
        return jsonify({'error': 'Invalid transaction ID or the transaction is not completed.'}), 400

# 5. Feed Generation Service
@app.route('/api/feed', methods=['GET'])
def generate_feed():
    # Simulate generating a personalized feed for the user
    # In a real-world scenario, this would involve complex algorithms to curate relevant content.
    return jsonify({'feed': []}), 200

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

Customer:

CustomerID: Unique identifier for each customer.
Name: Name of the customer.
Email: Email address of the customer.
Password: Encrypted password for the customer's account.

PaymentMethod:

MethodID: Unique identifier for each payment method.
CustomerID: Foreign key referencing the Customer table.
Type: Type of payment method (e.g., credit card, bank account, Amazon Pay balance).
AccountInfo: Details of the payment method (e.g., credit card number, bank account details).

Transaction:

TransactionID: Unique identifier for each transaction.
CustomerID: Foreign key referencing the Customer table.
Amount: Amount of the transaction.
Timestamp: Date and time when the transaction occurred.
Status: Status of the transaction (e.g., initiated, completed, refunded).

from flask import Flask, jsonify, request

app = Flask(__name__)

# Mock database to store transactions and refund details
transactions = {}
refunds = {}

@app.route('/api/payments/initiate', methods=['POST'])
def initiate_payment():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']
    payment_method = data['payment_method']

    # Simulate payment token generation (This could involve external payment gateway interaction)
    payment_token = f"PAYMENT_{customer_id}_{merchant_id}_{amount}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'status': 'initiated'
    }

    return jsonify({'payment_token': payment_token}), 200

@app.route('/api/payments/process', methods=['POST'])
def process_payment():
    data = request.get_json()
    payment_token = data['payment_token']

    # Check if payment token exists in transactions (validate token)
    if payment_token in transactions:
        transaction = transactions[payment_token]

        # Simulate payment processing (This could involve interaction with payment gateways)
        # For simplicity, assume the payment is successful
        transaction['status'] = 'completed'
        transaction_id = f"TRANS_{transaction['customer_id']}_{transaction['merchant_id']}_{transaction['amount']}"

        return jsonify({'status': 'success', 'transaction_id': transaction_id}), 200
    else:
        return jsonify({'error': 'Invalid payment token.'}), 400

@app.route('/api/payments/refund', methods=['POST'])
def refund_payment():
    data = request.get_json()
    transaction_id = data['transaction_id']
    amount = data['amount']

    # Check if the transaction ID exists in completed transactions
    if transaction_id in transactions and transactions[transaction_id]['status'] == 'completed':
        # Simulate refund processing
        refund_id = f"REFUND_{transaction_id}_{amount}"
        refunds[refund_id] = {
            'transaction_id': transaction_id,
            'amount': amount,
            'status': 'completed'
        }
        return jsonify({'refund_id': refund_id}), 200
    else:
        return jsonify({'error': 'Invalid transaction ID or the transaction is not completed.'}), 400

@app.route('/api/payments/status', methods=['GET'])
def get_transaction_status():
    transaction_id = request.args.get('transaction_id')

    # Check if the transaction ID exists
    if transaction_id in transactions:
        status = transactions[transaction_id]['status']
        return jsonify({'status': status}), 200
    else:
        return jsonify({'error': 'Transaction not found.'}), 404

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

from flask import Flask, request, jsonify

app = Flask(__name__)

# Mock database to store customer and payment method data
customers = {}
payment_methods = {}

# Create Customer API
@app.route('/api/customers', methods=['POST'])
def create_customer():
    data = request.get_json()
    customer_id = len(customers) + 1
    customer = {
        'customer_id': customer_id,
        'name': data['name'],
        'email': data['email']
    }
    customers[customer_id] = customer
    return jsonify(customer), 201

# Get Customer Details API
@app.route('/api/customers/<int:customer_id>', methods=['GET'])
def get_customer(customer_id):
    if customer_id in customers:
        return jsonify(customers[customer_id]), 200
    else:
        return jsonify({'error': 'Customer not found'}), 404

# Add Payment Method API
@app.route('/api/customers/<int:customer_id>/payment-methods', methods=['POST'])
def add_payment_method(customer_id):
    data = request.get_json()
    payment_method_id = len(payment_methods) + 1
    payment_method = {
        'method_id': payment_method_id,
        'type': data['type'],
        'account_info': data['account_info']
    }
    payment_methods[payment_method_id] = payment_method
    return jsonify(payment_method), 201

# Get Payment Methods API
@app.route('/api/customers/<int:customer_id>/payment-methods', methods=['GET'])
def get_payment_methods(customer_id):
    if customer_id in customers:
        customer_payment_methods = []
        for payment_method_id, payment_method in payment_methods.items():
            if payment_method_id == customer_id:
                customer_payment_methods.append(payment_method)
        return jsonify({'payment_methods': customer_payment_methods}), 200
    else:
        return jsonify({'error': 'Customer not found'}), 404

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

Initiate Payment:

Endpoint: /api/payments/initiate
Method: POST
Parameters:
customer_id: ID of the customer initiating the payment.
merchant_id: ID of the merchant receiving the payment.
amount: Payment amount.
payment_method: Selected payment method (e.g., credit card, Amazon Pay balance).
Response: JSON containing a payment token or error message.
Process Payment:

Endpoint: /api/payments/process
Method: POST
Parameters:
payment_token: Token obtained from the payment initiation step.
Response: JSON containing payment status (e.g., success, failure) and transaction ID.
Refund:

Endpoint: /api/payments/refund
Method: POST
Parameters:
transaction_id: ID of the transaction to be refunded.
amount: Amount to be refunded.
Response: JSON containing refund status and refund ID.
Get Transaction Status:

Endpoint: /api/payments/status
Method: GET
Parameters:
transaction_id: ID of the transaction to check status.
Response: JSON containing transaction status (e.g., initiated, completed).

from flask import Flask, jsonify, request

app = Flask(__name__)

# Mock database to store transactions and refund details
transactions = {}
refunds = {}

# 1. One-Click Checkout
@app.route('/api/payments/one-click', methods=['POST'])
def one_click_checkout():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']

    # Simulate payment token generation for one-click checkout
    payment_token = f"ONE_CLICK_{customer_id}_{merchant_id}_{amount}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'status': 'completed'
    }

    return jsonify({'payment_token': payment_token}), 200

# 3. Multi-Currency Support
@app.route('/api/payments/multi-currency', methods=['POST'])
def multi_currency_support():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']
    currency = data['currency']

    # Simulate payment token generation for multi-currency support
    payment_token = f"MULTI_CURRENCY_{customer_id}_{merchant_id}_{amount}_{currency}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'currency': currency,
        'status': 'completed'
    }

    return jsonify({'payment_token': payment_token}), 200

# 4. Mobile Integration
@app.route('/api/payments/mobile-integration', methods=['POST'])
def mobile_integration():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']

    # Simulate payment token generation for mobile integration
    payment_token = f"MOBILE_{customer_id}_{merchant_id}_{amount}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'status': 'completed'
    }

    return jsonify({'payment_token': payment_token}), 200

# 5. Subscription Payments
@app.route('/api/payments/subscription', methods=['POST'])
def subscription_payments():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']
    frequency = data['frequency']  # e.g., monthly, annually

    # Simulate payment token generation for subscription payments
    payment_token = f"SUBSCRIPTION_{customer_id}_{merchant_id}_{amount}_{frequency}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'frequency': frequency,
        'status': 'completed'
    }

    return jsonify({'payment_token': payment_token}), 200

# 6. Voice Commerce
@app.route('/api/payments/voice-commerce', methods=['POST'])
def voice_commerce():
    data = request.get_json()
    customer_id = data['customer_id']
    merchant_id = data['merchant_id']
    amount = data['amount']

    # Simulate payment token generation for voice commerce
    payment_token = f"VOICE_{customer_id}_{merchant_id}_{amount}"

    # Save the payment token for later processing
    transactions[payment_token] = {
        'customer_id': customer_id,
        'merchant_id': merchant_id,
        'amount': amount,
        'status': 'completed'
    }

    return jsonify({'payment_token': payment_token}), 200

# 7. Refund and Dispute Management
@app.route('/api/payments/refund', methods=['POST'])
def refund_payment():
    data = request.get_json()
    transaction_id = data['transaction_id']
    amount = data['amount']

    # Check if the transaction ID exists in completed transactions
    if transaction_id in transactions and transactions[transaction_id]['status'] == 'completed':
        # Simulate refund processing
        refund_id = f"REFUND_{transaction_id}_{amount}"
        refunds[refund_id] = {
            'transaction_id': transaction_id,
            'amount': amount,
            'status': 'completed'
        }
        return jsonify({'refund_id': refund_id}), 200
    else:
        return jsonify({'error': 'Invalid transaction ID or the transaction is not completed.'}), 400

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

Users:

User_ID: INT (Primary Key)
Username: STRING
Email: STRING
Password: STRING

Transactions:

Transaction_ID: INT (Primary Key)
Sender_ID: INT (Foreign Key referencing Users.User_ID)
Recipient_ID: INT (Foreign Key referencing Users.User_ID)
Amount: FLOAT
Timestamp: DATETIME

TransferStatus:

Status_ID: INT (Primary Key)
Status_Name: STRING

TransferHistory:

Transfer_ID: INT (Primary Key)
Transaction_ID: INT (Foreign Key referencing Transactions.Transaction_ID)
Status_ID: INT (Foreign Key referencing TransferStatus.Status_ID)
Timestamp: DATETIME

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

    def create_user(self, username, email, password):
        user_id = len(self.users) + 1
        user = {
            "user_id": user_id,
            "username": username,
            "email": email,
            "password": password
        }
        self.users[user_id] = user
        return user

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

    def get_user_by_email(self, email):
        for user in self.users.values():
            if user['email'] == email:
                return user
        return None

    def get_user_by_username(self, username):
        for user in self.users.values():
            if user['username'] == username:
                return user
        return None

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

    def create_transaction(self, sender_id, recipient_id, amount):
        transaction_id = len(self.transactions) + 1
        timestamp = datetime.datetime.now()

        transaction = {
            "transaction_id": transaction_id,
            "sender_id": sender_id,
            "recipient_id": recipient_id,
            "amount": amount,
            "timestamp": timestamp
        }

        self.transactions.append(transaction)
        return transaction

class TransferHistoryService:
    def __init__(self):
        self.transfer_history = []

    def add_transfer_history(self, transaction_id, status_id):
        transfer_id = len(self.transfer_history) + 1
        timestamp = datetime.datetime.now()

        transfer = {
            "transfer_id": transfer_id,
            "transaction_id": transaction_id,
            "status_id": status_id,
            "timestamp": timestamp
        }

        self.transfer_history.append(transfer)
        return transfer

from flask import Flask, request, jsonify

app = Flask(__name__)

# In-memory data store for users and transactions (for demo purposes)
users = {}
transactions = []

# Endpoint to create a new user
@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = len(users) + 1
    user = {
        "user_id": user_id,
        "username": data['username'],
        "email": data['email'],
        "full_name": data['full_name']
    }
    users[user_id] = user
    return jsonify(user), 201

# Endpoint to initiate a money transfer
@app.route('/transfer', methods=['POST'])
def initiate_transfer():
    data = request.get_json()
    transaction_id = len(transactions) + 1
    transaction = {
        "transaction_id": transaction_id,
        "user_id": data['user_id'],
        "recipient_name": data['recipient_name'],
        "recipient_country": data['recipient_country'],
        "amount": data['amount'],
        "currency": data['currency'],
        "status": "pending"
    }
    transactions.append(transaction)
    return jsonify(transaction), 202

# Endpoint to retrieve transaction history
@app.route('/transactions', methods=['GET'])
def get_transaction_history():
    user_id = int(request.args.get('user_id'))
    user_transactions = [t for t in transactions if t['user_id'] == user_id]
    return jsonify({"transactions": user_transactions}), 200

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

from flask import Flask, request, jsonify
import datetime

app = Flask(__name__)

# Endpoint for creating a new user
@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = len(users) + 1
    user = User(user_id, data['username'], data['email'], data['password'])
    users[user_id] = user
    return jsonify({"user_id": user_id}), 201

# Endpoint for getting user information
@app.route('/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,
            "balance": user.balance,
            "transactions": [{"transaction_id": t.transaction_id, "sender": t.sender.username, "recipient": t.recipient.username, "amount": t.amount, "timestamp": t.timestamp} for t in user.transactions]
        }), 200
    else:
        return jsonify({"message": "User not found"}), 404

# Endpoint for creating a new transaction
@app.route('/transactions', methods=['POST'])
def create_transaction():
    data = request.get_json()
    sender_id = data['sender_id']
    recipient_id = data['recipient_id']
    amount = data['amount']
    timestamp = datetime.datetime.now()
    global transaction_id_counter
    transaction_id = transaction_id_counter
    transaction_id_counter += 1

    sender = users.get(sender_id)
    recipient = users.get(recipient_id)
    if not sender or not recipient:
        return jsonify({"message": "Invalid sender or recipient"}), 404

    if sender.balance >= amount:
        sender.balance -= amount
        recipient.balance += amount
        transaction = Transaction(transaction_id, sender, recipient, amount, timestamp)
        sender.transactions.append(transaction)
        recipient.transactions.append(transaction)
        transactions.append(transaction)
        return jsonify({"transaction_id": transaction_id}), 201
    else:
        return jsonify({"message": "Insufficient balance"}), 400

if __name__ == "__main__":
    app.run()

import time

class Remitly:
    def __init__(self):
        # Initialize the remittance system (add necessary attributes and setup here)
        self.transactions = []

    def initiate_transaction(self, sender_id, recipient_id, amount):
        # Logic for initiating a transaction from the sender to the recipient
        transaction = {
            "transaction_id": len(self.transactions) + 1,
            "sender_id": sender_id,
            "recipient_id": recipient_id,
            "amount": amount,
            "status": "pending"
        }
        self.transactions.append(transaction)
        time.sleep(0.01)  # Simulate transaction processing time
        transaction["status"] = "completed"  # Simulate transaction completion
        return transaction

    def get_transaction(self, transaction_id):
        # Logic to fetch the details of a specific transaction
        for transaction in self.transactions:
            if transaction["transaction_id"] == transaction_id:
                return transaction
        return None

if __name__ == "__main__":
    remitly = Remitly()

    # Example code for initiating transactions
    sender_id = 123
    recipient_id = 456
    amount = 100.00

    transaction1 = remitly.initiate_transaction(sender_id, recipient_id, amount)
    print("Transaction 1 initiated:", transaction1)

    transaction2 = remitly.initiate_transaction(sender_id, recipient_id, amount)
    print("Transaction 2 initiated:", transaction2)

    # Example code for fetching transaction details
    transaction_id = 2

    transaction = remitly.get_transaction(transaction_id)
    if transaction:
        print(f"Transaction {transaction_id} details:", transaction)
    else:
        print(f"Transaction {transaction_id} not found.")

class AppleiCloud:
    def __init__(self):
        self.file_storage = {}

    def upload_file(self, user_id, file_name, file_data):
        # Upload the file to user's iCloud storage
        if user_id not in self.file_storage:
            self.file_storage[user_id] = []
        self.file_storage[user_id].append((file_name, file_data))

    def download_file(self, user_id, file_name):
        # Download the file from user's iCloud storage
        files = self.file_storage.get(user_id, [])
        for name, data in files:
            if name == file_name:
                return data
        return None

# Sample usage:
if __name__ == '__main__':
    icloud = AppleiCloud()

    # Upload files for users
    icloud.upload_file(12345, "file1.txt", b"This is file 1 content.")
    icloud.upload_file(12345, "file2.txt", b"This is file 2 content.")
    icloud.upload_file(67890, "document.pdf", b"This is a PDF document.")

    # Download files for users
    file_data = icloud.download_file(12345, "file1.txt")
    if file_data:
        print("File 1 Content:", file_data.decode())
    else:
        print("File not found.")

    file_data = icloud.download_file(67890, "document.pdf")
    if file_data:
        print("PDF Document Content:", file_data.decode())
    else:
        print("File not found.")

# Sample high-level design for Apple iCloud

class AppleiCloud:
    def __init__(self):
        # Initialize necessary components and services
        pass

    def authenticate_user(self, username, password):
        if username in users and users[username] == password:
            # In a real-world scenario, you should generate a more secure token using JWT or OAuth
            token = username
            return token
        else:
            return None

    def upload_file(self, token, file, filename):
        if not self.is_valid_token(token):
            return False, "Invalid token."

        if file:
            data_storage[filename] = file
            return True, "File uploaded successfully."
        else:
            return False, "No file provided."

    def download_file(self, token, filename):
        if not self.is_valid_token(token):
            return None

        if filename in data_storage:
            return data_storage[filename]
        else:
            return None

    def sync_data(self, token, data):
        if not self.is_valid_token(token):
            return False, "Invalid token."

        # Implement data synchronization logic here
        # For simplicity, we're just storing the data in data_storage dictionary
        data_storage[token] = data
        return True, "Data synchronized successfully."

    def is_valid_token(self, token):
        # In a real-world scenario, validate the token using a proper authentication mechanism
        return token in users


# Sample usage:
if __name__ == '__main__':
    icloud = AppleiCloud()

    # Authenticate user
    token = icloud.authenticate_user("user1", "password1")
    if token:
        print("Authentication successful. Token:", token)
    else:
        print("Authentication failed.")

    # Upload a file
    success, message = icloud.upload_file(token, b"This is some file content.", "sample_file.txt")
    print(message)

    # Download the file
    file_content = icloud.download_file(token, "sample_file.txt")
    if file_content:
        print("File content:", file_content)
    else:
        print("File not found.")

    # Synchronize data
    data = {"key": "value"}
    success, message = icloud.sync_data(token, data)
    print(message)

Authentication Endpoint:

Endpoint: /api/authenticate
Method: POST
Description: This endpoint handles user authentication and generates an authentication token for subsequent API calls.
Parameters: username, password
Response: JSON object containing success and token if authentication is successful.

File Upload Endpoint:

Endpoint: /api/upload
Method: POST
Description: Allows users to upload files to their iCloud storage.
Parameters: file (binary data), filename, token (authentication token)
Response: JSON object containing success if the file upload is successful.

File Download Endpoint:

Endpoint: /api/download
Method: GET
Description: Allows users to download files from their iCloud storage.
Parameters: filename, token (authentication token)
Response: File stream to download the requested file.

Data Synchronization Endpoint:

Endpoint: /api/sync
Method: POST
Description: Synchronizes user data across devices linked to their iCloud account.
Parameters: data (JSON payload), token (authentication token)
Response: JSON object containing success if synchronization is successful.

class AppleiCloud:
    def __init__(self):
        self.data = {}

    def synchronize_data(self, device_id, data):
        self.data[device_id] = data

    def get_synchronized_data(self, device_id):
        return self.data.get(device_id, {})

# Sample usage:
icloud = AppleiCloud()

# Synchronize data for device1
icloud.synchronize_data("device1", {"key1": "value1", "key2": "value2"})

# Get synchronized data for device1
print(icloud.get_synchronized_data("device1"))  # Output: {'key1': 'value1', 'key2': 'value2'}

class AppleiCloud:
    def __init__(self):
        self.backup = {}

    def backup_data(self, device_id, data):
        self.backup[device_id] = data

    def restore_data(self, device_id):
        return self.backup.get(device_id, None)

# Sample usage:
icloud = AppleiCloud()

# Backup data for device1
icloud.backup_data("device1", {"key1": "value1", "key2": "value2"})

# Restore data for device1
restored_data = icloud.restore_data("device1")
print(restored_data)  # Output: {'key1': 'value1', 'key2': 'value2'}

class AppleiCloud:
    def __init__(self):
        self.photo_library = {}

    def upload_photo(self, device_id, photo_name, photo_data):
        self.photo_library.setdefault(device_id, {})[photo_name] = photo_data

    def get_photo(self, device_id, photo_name):
        return self.photo_library.get(device_id, {}).get(photo_name, None)

# Sample usage:
icloud = AppleiCloud()

# Upload a photo for device1
icloud.upload_photo("device1", "photo1.jpg", b"Binary data of the photo")

# Get the photo for device1
photo_data = icloud.get_photo("device1", "photo1.jpg")
print(photo_data)  # Output: b'Binary data of the photo'

class AppleiCloud:
    def __init__(self):
        self.documents = {}

    def collaborate_on_document(self, document_id, collaborator, content):
        self.documents.setdefault(document_id, {}).setdefault(collaborator, []).append(content)

    def get_collaborators(self, document_id):
        return list(self.documents.get(document_id, {}).keys())

    def get_document_content(self, document_id, collaborator):
        return self.documents.get(document_id, {}).get(collaborator, [])

# Sample usage:
icloud = AppleiCloud()

# Document collaboration for document1
icloud.collaborate_on_document("document1", "user1", "Content from user1")
icloud.collaborate_on_document("document1", "user2", "Content from user2")

# Get collaborators for document1
collaborators = icloud.get_collaborators("document1")
print(collaborators)  # Output: ['user1', 'user2']

# Get document content for user1
user1_content = icloud.get_document_content("document1", "user1")
print(user1_content)  # Output: ['Content from user1']

class AppleiCloud:
    def __init__(self):
        self.devices = {}

    def register_device(self, device_id, device_name):
        self.devices[device_id] = device_name

    def find_device(self, device_id):
        return self.devices.get(device_id, None)

# Sample usage:
icloud = AppleiCloud()

# Register devices
icloud.register_device("device1", "iPhone 12")
icloud.register_device("device2", "MacBook Pro")

# Find devices
device_name = icloud.find_device("device1")
print(device_name)  # Output: iPhone 12

device_name = icloud.find_device("device3")  # Non-existent device
print(device_name)  # Output: None

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample user data for authentication (Replace this with a proper authentication mechanism)
users = {
    "user1": "password1",
    "user2": "password2"
}

# Sample data storage (Replace this with a proper data storage mechanism)
data_storage = {}


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

    if username in users and users[username] == password:
        # In a real-world scenario, you should generate a more secure token using JWT or OAuth
        token = username
        return jsonify({"success": True, "token": token})
    else:
        return jsonify({"success": False, "message": "Authentication failed."})


@app.route('/api/upload', methods=['POST'])
def upload_file():
    token = request.form.get('token')
    if not is_valid_token(token):
        return jsonify({"success": False, "message": "Invalid token."})

    file = request.files.get('file')
    if file:
        filename = request.form.get('filename')
        data_storage[filename] = file.read()
        return jsonify({"success": True})
    else:
        return jsonify({"success": False, "message": "No file provided."})


@app.route('/api/download', methods=['GET'])
def download_file():
    token = request.args.get('token')
    if not is_valid_token(token):
        return jsonify({"success": False, "message": "Invalid token."})

    filename = request.args.get('filename')
    if filename in data_storage:
        return data_storage[filename]
    else:
        return jsonify({"success": False, "message": "File not found."})


@app.route('/api/sync', methods=['POST'])
def sync_data():
    token = request.form.get('token')
    if not is_valid_token(token):
        return jsonify({"success": False, "message": "Invalid token."})

    data = request.form.get('data')
    # Implement data synchronization logic here
    # For simplicity, we're just storing the data in data_storage dictionary
    data_storage[token] = data
    return jsonify({"success": True})


def is_valid_token(token):
    # In a real-world scenario, validate the token using a proper authentication mechanism
    return token in users


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

import time

class PushNotificationSystem:
    def __init__(self):
        self.notification_count = 0

    def send_notification(self, user_id, message):
        # Simulate sending a notification
        self.notification_count += 1
        notification_id = f"{user_id}-{self.notification_count}"
        print(f"Sending notification {notification_id}: {message}")

def simulate_push_notification_system():
    push_notification_system = PushNotificationSystem()

    total_users = 10000
    daily_active_users = 3000
    notifications_per_user_per_day = 2

    for user_id in range(1, total_users + 1):
        for notification_num in range(1, notifications_per_user_per_day + 1):
            message = f"Notification {notification_num} for user {user_id}"
            push_notification_system.send_notification(user_id, message)
            time.sleep(1)  # Simulate time delay for sending notifications

if __name__ == "__main__":
    simulate_push_notification_system()

User:

Fields:
User ID: Unique identifier for each user.
Username: User's username for identification.
Email: User's email for communication.
Device Token: Unique token associated with the user's device for sending notifications.

Notification:

Fields:
Notification ID: Unique identifier for each notification.
User ID: Foreign key to associate the notification with a specific user.
Message: Content of the notification.
Timestamp: Timestamp indicating when the notification was sent.
Status: Indicates whether the notification was delivered successfully or not.

import time

# Sample database storage
users = {}
notifications = {}

class UserService:
    def register_user(self, username, email, device_token):
        user_id = len(users) + 1
        users[user_id] = {
            "username": username,
            "email": email,
            "device_token": device_token
        }
        return user_id

class NotificationService:
    def send_notification(self, user_id, message):
        notification_id = len(notifications) + 1
        timestamp = time.strftime('%Y-%m-%d %H:%M:%S')
        notifications[notification_id] = {
            "user_id": user_id,
            "message": message,
            "timestamp": timestamp,
            "status": "pending"
        }
        return notification_id

class PushNotificationService:
    def deliver_notification(self, device_token, message):
        print(f"Push notification sent to device: {device_token}\nMessage: {message}")

class DeliveryStatusService:
    def track_delivery_status(self, notification_id):
        if notification_id in notifications:
            notification = notifications[notification_id]
            return {
                "status": notification["status"],
                "timestamp": notification["timestamp"]
            }
        else:
            return {"status": "error", "message": "Invalid notification ID"}

class FeedGenerationService:
    def generate_user_feed(self, user_id):
        feed = []
        for notification_id, notification in notifications.items():
            if notification["user_id"] == user_id:
                feed.append(notification)
        return feed

class LoadBalancerService:
    def balance_load(self, request):
        # Sample load balancing logic
        return "ApplicationServer1"

class CacheService:
    cache = {}

    def get_from_cache(self, key):
        return self.cache.get(key, None)

    def store_in_cache(self, key, data):
        self.cache[key] = data

class CDNService:
    def deliver_content(self, content_url):
        print(f"Delivering content from CDN: {content_url}")

if __name__ == "__main__":
    user_service = UserService()
    notification_service = NotificationService()
    push_notification_service = PushNotificationService()
    delivery_status_service = DeliveryStatusService()
    feed_generation_service = FeedGenerationService()
    load_balancer_service = LoadBalancerService()
    cache_service = CacheService()
    cdn_service = CDNService()

    # Register a user
    user_id = user_service.register_user("user1", "[email protected]", "device_token1")

    # Send a notification
    notification_id = notification_service.send_notification(user_id, "Hello from the server!")

    # Simulate push notification delivery
    notification = notifications[notification_id]
    push_notification_service.deliver_notification(users[user_id]["device_token"], notification["message"])

    # Track delivery status
    status_info = delivery_status_service.track_delivery_status(notification_id)
    print(status_info)

    # Generate user feed
    user_feed = feed_generation_service.generate_user_feed(user_id)
    print(user_feed)

    # Load balancing example
    request = "Sample request"
    server = load_balancer_service.balance_load(request)
    print(f"Request routed to: {server}")

    # Cache example
    user_data = users[user_id]
    cache_service.store_in_cache("user1", user_data)
    cached_data = cache_service.get_from_cache("user1")
    print(cached_data)

    # CDN example
    cdn_service.deliver_content("https://example.com/image.jpg")

class User:
    def __init__(self, user_id, device_token):
        self.user_id = user_id
        self.device_token = device_token

class Notification:
    def __init__(self, notification_id, user_id, message, timestamp):
        self.notification_id = notification_id
        self.user_id = user_id
        self.message = message
        self.timestamp = timestamp
        self.status = "delivered"  # Assuming the notification is immediately marked as delivered

class NotificationService:
    def __init__(self):
        self.users = {}  # {user_id: User}
        self.notifications = {}  # {notification_id: Notification}

    def register_user(self, user_id, device_token):
        if user_id not in self.users:
            user = User(user_id, device_token)
            self.users[user_id] = user

    def send_notification(self, user_id, message):
        if user_id in self.users:
            notification_id = str(len(self.notifications) + 1)
            timestamp = "2023-07-20 12:00:00"  # Use actual timestamp here
            notification = Notification(notification_id, user_id, message, timestamp)
            self.notifications[notification_id] = notification
            return notification_id
        else:
            return None

    def get_notification(self, notification_id):
        return self.notifications.get(notification_id, None)

    def get_user_notifications(self, user_id):
        user_notifications = [notification for notification in self.notifications.values() if notification.user_id == user_id]
        return user_notifications

    def mark_notification_as_read(self, notification_id):
        if notification_id in self.notifications:
            self.notifications[notification_id].status = "read"
            return True
        else:
            return False

# Initialize the NotificationService
notification_service = NotificationService()

# Example usage
notification_service.register_user("user1", "device_token1")
notification_service.register_user("user2", "device_token2")

notification_id1 = notification_service.send_notification("user1", "Hello from User 1!")
notification_id2 = notification_service.send_notification("user2", "Hello from User 2!")

print(notification_service.get_notification(notification_id1))
print(notification_service.get_user_notifications("user2"))

notification_service.mark_notification_as_read(notification_id1)
print(notification_service.get_notification(notification_id1))