import java.util.*;

class User {
    private String id;
    private String name;
    private String email;
    // Other user details like employment history, education, etc.
    private List<User> connections;

    public User(String name, String email) {
        this.id = UUID.randomUUID().toString();
        this.name = name;
        this.email = email;
        this.connections = new ArrayList<>();
    }

    public void addConnection(User user) {
        connections.add(user);
    }

    public void removeConnection(User user) {
        connections.remove(user);
    }

    public List<User> getConnections() {
        return connections;
    }

    // Getters and setters
}

class Post {
    private String id;
    private User author;
    private String content;
    private Date timestamp;
    // Other post details like likes, comments, etc.

    public Post(User author, String content) {
        this.id = UUID.randomUUID().toString();
        this.author = author;
        this.content = content;
        this.timestamp = new Date();
    }

    // Getters and setters
}

class LinkedInSystem {
    private Map<String, User> users;
    private List<Post> posts;

    public LinkedInSystem() {
        this.users = new HashMap<>();
        this.posts = new ArrayList<>();
    }

    public void registerUser(String name, String email) {
        User user = new User(name, email);
        users.put(user.getId(), user);
    }

    public void removeUser(String userId) {
        users.remove(userId);
    }

    public User getUser(String userId) {
        return users.get(userId);
    }

    public void createPost(User author, String content) {
        Post post = new Post(author, content);
        posts.add(post);
    }

    public List<Post> getNewsFeed(User user) {
        List<Post> newsFeed = new ArrayList<>();
        for (User connection : user.getConnections()) {
            for (Post post : posts) {
                if (post.getAuthor().equals(connection)) {
                    newsFeed.add(post);
                }
            }
        }
        return newsFeed;
    }
}

public class LinkedInApp {
    public static void main(String[] args) {
        LinkedInSystem linkedIn = new LinkedInSystem();

        // Register users
        linkedIn.registerUser("John Doe", "[email protected]");
        linkedIn.registerUser("Jane Smith", "[email protected]");

        // Add connections
        User user1 = linkedIn.getUser("user1");
        User user2 = linkedIn.getUser("user2");
        user1.addConnection(user2);

        // Create posts
        User author = linkedIn.getUser("user1");
        linkedIn.createPost(author, "Hello, everyone!");
        
        // Get news feed
        User user = linkedIn.getUser("user1");
        List<Post> newsFeed = linkedIn.getNewsFeed(user);
        System.out.println("News Feed for User: " + user.getName());
        for (Post post : newsFeed) {
            System.out.println(post.getContent());
        }
    }
}

from linkedin_api import Linkedin
import json

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Create a profile
profile_data = {
    'firstName': 'John',
    'lastName': 'Doe',
    'headline': 'Software Engineer',
    'summary': 'Experienced software engineer with a background in Python',
    'educations': [{
        'schoolName': 'University of XYZ',
        'fieldOfStudy': 'Computer Science',
        'degreeName': 'Bachelor of Science',
        'activities': 'Computer Club',
        'dateRange': {'startYear': 2015, 'endYear': 2019},
    }],
    'positions': [{
        'title': 'Software Engineer',
        'companyName': 'ABC Corp',
        'locationName': 'San Francisco Bay Area',
        'description': 'Developed and maintained Python applications',
        'dateRange': {'startYear': 2019},
    }],
    'skills': ['Python', 'Java', 'SQL'],
    'accomplishments': {
        'publications': [{
            'title': 'A guide to Python programming',
            'publisher': 'O'Reilly Media',
            'date': {'year': 2020},
        }],
        'certifications': [{
            'name': 'Python Certification',
            'authority': 'Python Institute',
            'licenseNumber': '123456789',
            'date': {'year': 2021},
        }],
        'patents': [{
            'title': 'Method and system for improving Python performance',
            'number': 'US1234567B1',
            'date': {'year': 2022},
        }],
    },
}

profile = api.create_profile(profile_data)
print(json.dumps(profile, indent=4))

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Search for people by name
people_results = api.search_people('John Doe')
for person in people_results:
    print(person['firstName'], person['lastName'])

# Search for companies by name
company_results = api.search_companies('Google')
for company in company_results:
    print(company['name'])

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Send a connection request
api.send_invitation('John Doe', 'Hi John, I would like to connect with you on LinkedIn.')

# Accept a connection request
invitations = api.get_connection_invitations()
for invitation in invitations:
    if invitation['status'] == 'pending':
        api.accept_invitation(invitation['invitationId'])

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Create a post
post_data = {
    'text': 'Hello LinkedIn!',
    'visibility': {'code': 'anyone'},
}
api.create_post(post_data)

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Find a post to interact with
feed = api.get_home_feed()
post = feed['elements'][0]['updateContent']['company']['statusUpdate']

# Add a comment
api.add_comment(post['id'], 'Great post!')

# Share the post
api.share_post(post['id'], 'Check out this post!')

# Like the post
api.like_post(post['id'])

# Unlike the post
api.unlike_post(post['id'])

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Send a message
api.send_message('John Doe', 'Hello John!')

# Mark conversation as read
conversations = api.get_conversations()
for conversation in conversations:
    if not conversation['read']:
        api.mark_conversation_as_read(conversation['entityUrn'])

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Follow a user
api.follow_entity('John Doe')

# Unfollow a user
api.unfollow_entity('John Doe')

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Create a company page
company_data = {
    'name': 'Example Company',
    'description': 'We are an example company.',
}
company_id = api.create_company_page(company_data)

# Add a job posting
job_data = {
    'companyUrn': f'urn:li:company:{company_id}',
    'title': 'Software Engineer',
    'description': 'We are looking for a software engineer to join our team.',
}
api.add_job(job_data)

from linkedin_api import Linkedin

# Authenticate with LinkedIn's API
api = Linkedin('[email protected]', 'password')

# Get notifications
notifications = api.get_notifications()
for notification in notifications:
    if notification['type'] in ['CONNECTION_ACCEPTED', 'MESSAGE']:
        print(notification['title'], notification['created_at'])

class User:
    def __init__(self, user_id, username, email, password):
        self.user_id = user_id
        self.username = username
        self.email = email
        self.password = password
        # other user attributes
        
class Course:
    def __init__(self, course_id, title, description):
        self.course_id = course_id
        self.title = title
        self.description = description
        # other course attributes
        
class Enrollment:
    def __init__(self, enrollment_id, user, course, enrollment_date):
        self.enrollment_id = enrollment_id
        self.user = user
        self.course = course
        self.enrollment_date = enrollment_date
        # other enrollment attributes
        
# Additional classes for Likes, Comments, Certificates, etc.

class Coursera:
    def __init__(self):
        self.users = {}
        self.courses = {}
        self.enrollments = {}
        # other data structures for likes, comments, certificates, etc.
        
    def add_user(self, user):
        self.users[user.user_id] = user
        
    def add_course(self, course):
        self.courses[course.course_id] = course
        
    def enroll_user(self, user_id, course_id, enrollment_date):
        user = self.users.get(user_id)
        course = self.courses.get(course_id)
        
        if user is None or course is None:
            return False
        
        enrollment_id = len(self.enrollments) + 1
        enrollment = Enrollment(enrollment_id, user, course, enrollment_date)
        self.enrollments[enrollment_id] = enrollment
        return True
        
    # Additional methods for managing likes, comments, certificates, etc.

User Management API:
POST /users: Create a new user account.
GET /users/{user_id}: Retrieve user information by user ID.
PATCH /users/{user_id}: Update user information by user ID.

Course Management API:
POST /courses: Create a new course.
GET /courses/{course_id}: Retrieve course information by course ID.

Enrollment API:
POST /enrollments: Enroll a user in a course.
GET /enrollments/{enrollment_id}: Retrieve enrollment information by enrollment ID.

Like API:
POST /likes: Like a course or a post.
GET /likes/{like_id}: Retrieve like information by like ID.

Comment API:
POST /comments: Add a comment to a course or a post.
GET /comments/{comment_id}: Retrieve comment information by comment ID.

Certificate API:
POST /certificates: Generate a certificate for a user upon course completion.
GET /certificates/{certificate_id}: Retrieve certificate information by certificate ID.

from flask import Flask, request, jsonify

app = Flask(__name__)
coursera = Coursera()

# User Management API
@app.route('/users', methods=['POST'])
def create_user():
    data = request.json
    user_id = data.get('user_id')
    username = data.get('username')
    email = data.get('email')
    password = data.get('password')

    if user_id and username and email and password:
        user = User(user_id, username, email, password)
        coursera.add_user(user)
        return jsonify({'message': 'User created successfully'}), 201
    else:
        return jsonify({'error': 'Invalid user data'}), 400

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

@app.route('/users/<user_id>', methods=['PATCH'])
def update_user(user_id):
    user = coursera.users.get(user_id)
    if user:
        data = request.json
        user.username = data.get('username', user.username)
        user.email = data.get('email', user.email)
        user.password = data.get('password', user.password)
        # Update other user attributes as needed
        return jsonify({'message': 'User updated successfully'}), 200
    else:
        return jsonify({'error': 'User not found'}), 404


# Course Management API
@app.route('/courses', methods=['POST'])
def create_course():
    data = request.json
    course_id = data.get('course_id')
    title = data.get('title')
    description = data.get('description')

    if course_id and title and description:
        course = Course(course_id, title, description)
        coursera.add_course(course)
        return jsonify({'message': 'Course created successfully'}), 201
    else:
        return jsonify({'error': 'Invalid course data'}), 400

@app.route('/courses/<course_id>', methods=['GET'])
def get_course(course_id):
    course = coursera.courses.get(course_id)
    if course:
        return jsonify(course.__dict__), 200
    else:
        return jsonify({'error': 'Course not found'}), 404


# Enrollment API
@app.route('/enrollments', methods=['POST'])
def enroll_user():
    data = request.json
    enrollment_id = data.get('enrollment_id')
    user_id = data.get('user_id')
    course_id = data.get('course_id')
    enrollment_date = data.get('enrollment_date')

    if enrollment_id and user_id and course_id and enrollment_date:
        enrolled = coursera.enroll_user(user_id, course_id, enrollment_date)
        if enrolled:
            return jsonify({'message': 'User enrolled successfully'}), 200
        else:
            return jsonify({'error': 'User or course not found'}), 404
    else:
        return jsonify({'error': 'Invalid enrollment data'}), 400

@app.route('/enrollments/<enrollment_id>', methods=['GET'])
def get_enrollment(enrollment_id):
    enrollment = coursera.enrollments.get(enrollment_id)
    if enrollment:
        return jsonify(enrollment.__dict__), 200
    else:
        return jsonify({'error': 'Enrollment not found'}), 404


# Like API
@app.route('/likes', methods=['POST'])
def like_content():
    data = request.json
    like_id = data.get('like_id')
    user_id = data.get('user_id')
    content_id = data.get('content_id')

    if like_id and user_id and content_id:
        # Logic to handle the like
        return jsonify({'message': 'Content liked successfully'}), 200
    else:
        return jsonify({'error': 'Invalid like data'}), 400

@app.route('/likes/<like_id>', methods=['GET'])
def get_like(like_id):
    like = coursera.likes.get(like_id)
    if like:
        return jsonify(like.__dict__), 200
    else:
        return jsonify({'error': 'Like not found'}), 404


# Comment API
@app.route('/comments', methods=['POST'])
def add_comment():
    data = request.json
    comment_id = data.get('comment_id')
    content_id = data.get('content_id')
    user_id = data.get('user_id')
    text = data.get('text')

    if comment_id and content_id and user_id and text:
        # Logic to add the comment
        return jsonify({'message': 'Comment added successfully'}), 200
    else:
        return jsonify({'error': 'Invalid comment data'}), 400

@app.route('/comments/<comment_id>', methods=['GET'])
def get_comment(comment_id):
    comment = coursera.comments.get(comment_id)
    if comment:
        return jsonify(comment.__dict__), 200
    else:
        return jsonify({'error': 'Comment not found'}), 404


# Certificate API
@app.route('/certificates', methods=['POST'])
def generate_certificate():
    data = request.json
    certificate_id = data.get('certificate_id')
    user_id = data.get('user_id')
    course_id = data.get('course_id')

    if certificate_id and user_id and course_id:
        # Logic to generate the certificate
        return jsonify({'message': 'Certificate generated successfully'}), 200
    else:
        return jsonify({'error': 'Invalid certificate data'}), 400

@app.route('/certificates/<certificate_id>', methods=['GET'])
def get_certificate(certificate_id):
    certificate = coursera.certificates.get(certificate_id)
    if certificate:
        return jsonify(certificate.__dict__), 200
    else:
        return jsonify({'error': 'Certificate not found'}), 404


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

class UserManager:
    def register_user(self, user_data):
        # Logic for user registration
        pass

    def login_user(self, user_credentials):
        # Logic for user login
        pass

    def enroll_course(self, user_id, course_id):
        # Logic for course enrollment
        pass

# API Endpoints
@app.route('/register', methods=['POST'])
def register_user():
    user_data = request.get_json()
    user_manager = UserManager()
    user_manager.register_user(user_data)
    return jsonify({'message': 'User registered successfully'})

@app.route('/login', methods=['POST'])
def login_user():
    user_credentials = request.get_json()
    user_manager = UserManager()
    user_manager.login_user(user_credentials)
    return jsonify({'message': 'User logged in successfully'})

@app.route('/enroll', methods=['POST'])
def enroll_course():
    enrollment_data = request.get_json()
    user_id = enrollment_data['user_id']
    course_id = enrollment_data['course_id']
    user_manager = UserManager()
    user_manager.enroll_course(user_id, course_id)
    return jsonify({'message': 'Course enrolled successfully'})

class CourseCatalog:
    def __init__(self):
        self.courses = []

    def add_course(self, course):
        self.courses.append(course)

    def get_all_courses(self):
        return self.courses

class Course:
    def __init__(self, course_id, title, description):
        self.course_id = course_id
        self.title = title
        self.description = description

# Usage example:
catalog = CourseCatalog()

course1 = Course(1, "Introduction to Python", "Learn the basics of Python programming")
course2 = Course(2, "Data Science Fundamentals", "Explore the world of data science")
course3 = Course(3, "Web Development with Django", "Build web applications using Django framework")

catalog.add_course(course1)
catalog.add_course(course2)
catalog.add_course(course3)

all_courses = catalog.get_all_courses()
for course in all_courses:
    print(f"Course ID: {course.course_id}")
    print(f"Title: {course.title}")
    print(f"Description: {course.description}")
    print("------")

class Learner:
    def __init__(self, learner_id, name):
        self.learner_id = learner_id
        self.name = name
        self.enrolled_courses = []

    def enroll_course(self, course):
        self.enrolled_courses.append(course)

    def get_enrolled_courses(self):
        return self.enrolled_courses

# Usage example:
learner1 = Learner(1, "John Doe")
learner2 = Learner(2, "Jane Smith")

learner1.enroll_course(course1)
learner1.enroll_course(course3)
learner2.enroll_course(course2)

courses_enrolled_by_learner1 = learner1.get_enrolled_courses()
courses_enrolled_by_learner2 = learner2.get_enrolled_courses()

print(f"Learner 1 ({learner1.name}) enrolled courses:")
for course in courses_enrolled_by_learner1:
    print(f"Course ID: {course.course_id}")
    print(f"Title: {course.title}")
    print(f"Description: {course.description}")
    print("------")

print(f"Learner 2 ({learner2.name}) enrolled courses:")
for course in courses_enrolled_by_learner2:
    print(f"Course ID: {course.course_id}")
    print(f"Title: {course.title}")
    print(f"Description: {course.description}")
    print("------")

class Assignment:
    def __init__(self, assignment_id, course, title, description):
        self.assignment_id = assignment_id
        self.course = course
        self.title = title
        self.description = description

class Instructor:
    def __init__(self, instructor_id, name):
        self.instructor_id = instructor_id
        self.name = name
        self.assignments = []

    def create_assignment(self, course, title, description):
        assignment_id = len(self.assignments) + 1
        assignment = Assignment(assignment_id, course, title, description)
        self.assignments.append(assignment)

    def get_assignments(self):
        return self.assignments

# Usage example:
instructor = Instructor(1, "Professor Smith")

instructor.create_assignment(course1, "Python Exercise 1", "Write a program to calculate the Fibonacci sequence")
instructor.create_assignment(course2, "Data Analysis Project", "Perform data analysis on a given dataset")

assignments = instructor.get_assignments()

print(f"Instructor: {instructor.name}")
print("Assignments:")
for assignment in assignments:
    print(f"Assignment ID: {assignment.assignment_id}")
    print(f"Course: {assignment.course.title}")
    print(f"Title: {assignment.title}")
    print(f"Description: {assignment.description}")
    print("------")

class DiscussionForum:
    def __init__(self):
        self.posts = []

    def create_post(self, course, author, content):
        post = {
            'course': course,
            'author': author,
            'content': content
        }
        self.posts.append(post)

    def get_posts_by_course(self, course):
        return [post for post in self.posts if post['course'] == course]

# Usage example:
forum = DiscussionForum()

forum.create_post(course1, learner1, "I'm having trouble with loops in Python. Any suggestions?")
forum.create_post(course1, learner2, "Here's a helpful resource for learning Python loops: <link>")
forum.create_post(course2, learner1, "What are some popular machine learning algorithms?")
forum.create_post(course2, learner2, "Check out the scikit-learn library for machine learning algorithms.")

posts_for_course1 = forum.get_posts_by_course(course1)
posts_for_course2 = forum.get_posts_by_course(course2)

print(f"Discussion Forum - Course: {course1.title}")
for post in posts_for_course1:
    print(f"Author: {post['author'].name}")
    print(f"Content: {post['content']}")
    print("------")

print(f"Discussion Forum - Course: {course2.title}")
for post in posts_for_course2:
    print(f"Author: {post['author'].name}")
    print(f"Content: {post['content']}")
    print("------")

class Certificate:
    def __init__(self, learner, course, completion_date):
        self.learner = learner
        self.course = course
        self.completion_date = completion_date

class CertificationSystem:
    def __init__(self):
        self.certificates = []

    def issue_certificate(self, learner, course, completion_date):
        certificate = Certificate(learner, course, completion_date)
        self.certificates.append(certificate)

    def get_certificates_for_learner(self, learner):
        return [certificate for certificate in self.certificates if certificate.learner == learner]

# Usage example:
certification_system = CertificationSystem()

completion_date = "2023-06-30"
certification_system.issue_certificate(learner1, course1, completion_date)
certification_system.issue_certificate(learner2, course2, completion_date)

certificates_for_learner1 = certification_system.get_certificates_for_learner(learner1)
certificates_for_learner2 = certification_system.get_certificates_for_learner(learner2)

print(f"Certificates for Learner 1 ({learner1.name}):")
for certificate in certificates_for_learner1:
    print(f"Course: {certificate.course.title}")
    print(f"Completion Date: {certificate.completion_date}")
    print("------")

print(f"Certificates for Learner 2 ({learner2.name}):")
for certificate in certificates_for_learner2:
    print(f"Course: {certificate.course.title}")
    print(f"Completion Date: {certificate.completion_date}")
    print("------")

import requests

class SearchEngine:
    def __init__(self, base_url, access_token):
        self.base_url = base_url
        self.access_token = access_token

    def perform_search(self, query):
        search_endpoint = f'{self.base_url}/search?q={query}&access_token={self.access_token}'
        response = requests.get(search_endpoint)
        if response.status_code == 200:
            search_results = response.json()
            return search_results
        else:
            return None

class LikeService:
    def __init__(self, base_url, access_token):
        self.base_url = base_url
        self.access_token = access_token

    def like_result(self, result_id):
        like_endpoint = f'{self.base_url}/results/{result_id}/like?access_token={self.access_token}'
        response = requests.post(like_endpoint)
        if response.status_code == 200:
            print('Result liked successfully!')
        else:
            print('Unable to like result.')

class CommentService:
    def __init__(self, base_url, access_token):
        self.base_url = base_url
        self.access_token = access_token

    def add_comment(self, result_id, comment):
        comment_endpoint = f'{self.base_url}/results/{result_id}/comments?access_token={self.access_token}'
        payload = {'comment': comment}
        response = requests.post(comment_endpoint, json=payload)
        if response.status_code == 200:
            print('Comment added successfully!')
        else:
            print('Unable to add comment.')

# Example usage
base_url = 'https://api.baidu.com'
access_token = 'your_access_token'

search_engine = SearchEngine(base_url, access_token)
search_results = search_engine.perform_search('Baidu')

if search_results:
    result_id = search_results['result_id']
    like_service = LikeService(base_url, access_token)
    like_service.like_result(result_id)

    comment_service = CommentService(base_url, access_token)
    comment_service.add_comment(result_id, 'Great search engine!')

from flask import Flask, request, jsonify
import uuid

app = Flask(__name__)

users = {}
search_results = []

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

class SearchQuery:
    def __init__(self, query, user):
        self.query = query
        self.user = user

class SearchResult:
    def __init__(self, result_id, search_query, url, title):
        self.result_id = result_id
        self.search_query = search_query
        self.url = url
        self.title = title

@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = str(uuid.uuid4())
    username = data['username']
    password = data['password']
    user = User(user_id, username, password)
    users[user_id] = user
    return 'User created successfully', 200

@app.route('/search', methods=['POST'])
def perform_search():
    data = request.get_json()
    user_id = data['user_id']
    query = data['query']
    if user_id not in users:
        return 'User not found', 404
    result_id = str(uuid.uuid4())
    search_query = SearchQuery(query, users[user_id])
    search_result = SearchResult(result_id, search_query, '', '')  # Fill in URL and title
    search_results.append(search_result)
    return 'Search performed successfully', 200

@app.route('/users/<user_id>/search-results', methods=['GET'])
def get_search_results(user_id):
    if user_id not in users:
        return 'User not found', 404
    user_search_results = []
    for search_result in search_results:
        if search_result.search_query.user.user_id == user_id:
            user_search_results.append(search_result.__dict__)
    return jsonify(user_search_results), 200

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

Search API:
Endpoint: /search
Method: POST
Request Parameters:
query: The search query entered by the user.
filters: Optional filters to refine the search results.
Response:
status: The status of the API request (e.g., "success" or "error").
results: An array of search results matching the query.

User Management API:

Endpoint: /users
Method: GET
Request Parameters: None
Response:
status: The status of the API request (e.g., "success" or "error").
users: An array of user objects containing user details.
Content Upload API:

Endpoint: /upload
Method: POST
Request Parameters:
user_id: The ID of the user uploading the content.
content: The content to be uploaded.
Response:
status: The status of the API request (e.g., "success" or "error").
message: A message indicating the result of the content upload.

from flask import Flask, request, jsonify

app = Flask(__name__)

users = [
    {'id': 1, 'name': 'John Doe'},
    {'id': 2, 'name': 'Jane Smith'},
    # Additional user objects
]

@app.route('/users', methods=['GET'])
def get_users():
    return jsonify({
        'status': 'success',
        'users': users
    })

@app.route('/upload', methods=['POST'])
def upload_content():
    user_id = request.json.get('user_id')
    content = request.json.get('content')
    
    # Perform content upload logic here
    
    return jsonify({
        'status': 'success',
        'message': 'Content uploaded successfully.'
    })

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

class SearchEngine:
    def __init__(self):
        self.index = {}

    def index_document(self, document_id, content):
        # Index the document by splitting content into keywords
        keywords = content.lower().split()
        for keyword in keywords:
            if keyword not in self.index:
                self.index[keyword] = set()
            self.index[keyword].add(document_id)

    def search(self, query):
        # Search for documents containing all keywords in the query
        keywords = query.lower().split()
        results = None
        for keyword in keywords:
            if keyword in self.index:
                if results is None:
                    results = self.index[keyword]
                else:
                    results = results.intersection(self.index[keyword])
        return results

class NaturalLanguageProcessing:
    def __init__(self):
        # Initialize NLP model
        self.model = NLPModel()

    def analyze_sentiment(self, text):
        # Perform sentiment analysis on the given text
        sentiment_score = self.model.analyze_sentiment(text)
        return sentiment_score

    def extract_entities(self, text):
        # Extract named entities from the given text
        entities = self.model.extract_entities(text)
        return entities

class ComputerVision:
    def __init__(self):
        # Initialize computer vision model
        self.model = CVModel()

    def detect_objects(self, image):
        # Detect objects in the given image
        detected_objects = self.model.detect_objects(image)
        return detected_objects

    def recognize_text(self, image):
        # Recognize text in the given image
        extracted_text = self.model.recognize_text(image)
        return extracted_text

class VoiceRecognition:
    def __init__(self):
        # Initialize voice recognition model
        self.model = VoiceModel()

    def transcribe_audio(self, audio):
        # Transcribe the given audio to text
        transcribed_text = self.model.transcribe_audio(audio)
        return transcribed_text

class BaiduMaps:
    def __init__(self):
        # Initialize Baidu Maps
        self.api_key = 'your_api_key'
        self.client = MapsClient(api_key=self.api_key)

    def search_location(self, query):
        # Search for a location based on the given query
        search_results = self.client.search(query)
        return search_results

    def get_directions(self, origin, destination):
        # Get directions from the origin to the destination
        directions = self.client.get_directions(origin, destination)
        return directions

class BaiduCloud:
    def __init__(self):
        # Initialize Baidu Cloud
        self.access_key = 'your_access_key'
        self.secret_key = 'your_secret_key'
        self.client = CloudClient(access_key=self.access_key, secret_key=self.secret_key)

    def upload_file(self, file):
        # Upload the given file to Baidu Cloud
        uploaded_file_url = self.client.upload(file)
        return uploaded_file_url

    def download_file(self, file_url):
        # Download the file from the given URL
        downloaded_file = self.client.download(file_url)
        return downloaded_file

class BaiduWallet:
    def __init__(self):
        # Initialize Baidu Wallet
        self.api_key = 'your_api_key'
        self.client = WalletClient(api_key=self.api_key)

    def make_payment(self, amount, recipient):
        # Make a payment of the given amount to the recipient
        payment_status = self.client.make_payment(amount, recipient)
        return payment_status

    def check_balance(self):
        # Check the balance in the Baidu Wallet
        balance = self.client.check_balance()
        return balance

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

class Article:
    def __init__(self, article_id, title, content):
        self.article_id = article_id
        self.title = title
        self.content = content
        # Other article attributes

class Category:
    def __init__(self, category_id, name):
        self.category_id = category_id
        self.name = name
        # Other category attributes

class Wikipedia:
    def __init__(self):
        self.users = {}
        self.articles = {}
        self.categories = {}

    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_article(self, article_id, title, content):
        article = Article(article_id, title, content)
        self.articles[article_id] = article

    def get_article_by_id(self, article_id):
        return self.articles.get(article_id)

    def create_category(self, category_id, name):
        category = Category(category_id, name)
        self.categories[category_id] = category

    def get_category_by_id(self, category_id):
        return self.categories.get(category_id)

User Management API:
Endpoint: /users

Method: POST
Functionality: Create a new user account
Request Body:

{
  "user_id": "user1",
  "username": "JohnDoe",
  "password": "password123"
}
Response:
Status: 201 (Created)
Endpoint: /users/{user_id}

Method: GET
Functionality: Get user information by ID
Response:
Status: 200 (OK)
Body:

{
  "user_id": "user1",
  "username": "JohnDoe"
}
Article Management API:
Endpoint: /articles

Method: POST
Functionality: Create a new article
Request Body:

{
  "article_id": "article1",
  "title": "Introduction to Wikipedia",
  "content": "Wikipedia is a free online encyclopedia."
}
Response:
Status: 201 (Created)
Endpoint: /articles/{article_id}

Method: GET
Functionality: Get article information by ID
Response:
Status: 200 (OK)
Body:

{
  "article_id": "article1",
  "title": "Introduction to Wikipedia",
  "content": "Wikipedia is a free online encyclopedia."
}
Category Management API:
Endpoint: /categories

Method: POST
Functionality: Create a new category
Request Body:

{
  "category_id": "category1",
  "name": "Technology"
}
Response:
Status: 201 (Created)
Endpoint: /categories/{category_id}

Method: GET
Functionality: Get category information by ID
Response:
Status: 200 (OK)
Body:

{
  "category_id": "category1",
  "name": "Technology"
}

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/articles', methods=['GET'])
def get_articles():
    # Logic to retrieve articles from the database
    articles = retrieve_articles()
    return jsonify(articles)

@app.route('/articles/<article_id>', methods=['GET'])
def get_article(article_id):
    # Logic to retrieve a specific article from the database
    article = retrieve_article(article_id)
    return jsonify(article)

@app.route('/articles', methods=['POST'])
def create_article():
    # Logic to create a new article
    data = request.get_json()
    article = create_new_article(data)
    return jsonify(article), 201

@app.route('/articles/<article_id>', methods=['PUT'])
def update_article(article_id):
    # Logic to update an existing article
    data = request.get_json()
    updated_article = update_existing_article(article_id, data)
    return jsonify(updated_article)

@app.route('/articles/<article_id>', methods=['DELETE'])
def delete_article(article_id):
    # Logic to delete an existing article
    delete_existing_article(article_id)
    return '', 204

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

class Article:
    def __init__(self, title, content):
        self.title = title
        self.content = content

    def edit_content(self, new_content):
        self.content = new_content

class Article:
    def __init__(self, title, content):
        self.title = title
        self.content = content
        self.revisions = []
    
    def edit_content(self, new_content):
        # Save the previous version before editing
        self.revisions.append(self.content)
        self.content = new_content

    def get_revision_history(self):
        return self.revisions

    def revert_to_revision(self, revision_index):
        if 0 <= revision_index < len(self.revisions):
            self.content = self.revisions[revision_index]

class Article:
    def __init__(self, title, content, language):
        self.title = title
        self.content = content
        self.language = language

    def set_language(self, language):
        self.language = language

class Wikipedia:
    def __init__(self):
        self.articles = []

    def search_articles(self, keyword):
        matching_articles = []
        for article in self.articles:
            if keyword.lower() in article.title.lower() or keyword.lower() in article.content.lower():
                matching_articles.append(article)
        return matching_articles

class Category:
    def __init__(self, name):
        self.name = name
        self.articles = []

    def add_article(self, article):
        self.articles.append(article)

    def remove_article(self, article):
        if article in self.articles:
            self.articles.remove(article)

from flask import Flask, request

app = Flask(__name__)

# Data storage
users = {}
posts = {}
likes = {}
comments = {}

# Like Service
@app.route('/like', methods=['POST'])
def like_post():
    user_id = request.form.get('user_id')
    post_id = request.form.get('post_id')

    if user_id not in users:
        return 'User not found', 404

    if post_id not in posts:
        return 'Post not found', 404

    if user_id in likes and post_id in likes[user_id]:
        return 'User already liked the post', 400

    if user_id not in likes:
        likes[user_id] = set()
    likes[user_id].add(post_id)

    return 'Post liked successfully!', 200


# Follow Service
@app.route('/follow', methods=['POST'])
def follow_user():
    follower_id = request.form.get('follower_id')
    following_id = request.form.get('following_id')

    if follower_id not in users:
        return 'Follower not found', 404

    if following_id not in users:
        return 'Following user not found', 404

    if follower_id in users and following_id in users:
        if following_id not in users[follower_id]['following']:
            users[follower_id]['following'].append(following_id)
            users[following_id]['followers'].append(follower_id)
        return 'User followed successfully!', 200
    else:
        return 'User not found', 404


# Comment Service
@app.route('/comment', methods=['POST'])
def add_comment():
    user_id = request.form.get('user_id')
    post_id = request.form.get('post_id')
    comment_text = request.form.get('comment_text')

    if user_id not in users:
        return 'User not found', 404

    if post_id not in posts:
        return 'Post not found', 404

    if post_id not in comments:
        comments[post_id] = []

    comment_id = len(comments[post_id]) + 1

    comment = {
        'comment_id': comment_id,
        'user_id': user_id,
        'comment_text': comment_text
    }

    comments[post_id].append(comment)

    return 'Comment added successfully!', 200


# Post Service
@app.route('/post', methods=['POST'])
def create_post():
    user_id = request.form.get('user_id')
    photo_url = request.form.get('photo_url')
    caption = request.form.get('caption')
    location = request.form.get('location')

    if user_id not in users:
        return 'User not found', 404

    post_id = len(posts) + 1

    post = {
        'post_id': post_id,
        'user_id': user_id,
        'photo_url': photo_url,
        'caption': caption,
        'location': location
    }

    posts[post_id] = post

    return 'Post created successfully!', 200


# Feed Generation Service
@app.route('/feed', methods=['GET'])
def generate_feed():
    user_id = request.args.get('user_id')

    if user_id not in users:
        return 'User not found', 404

    user_following = users[user_id]['following']
    user_feed = []

    for following_user_id in user_following:
        if following_user_id in posts:
            user_feed.append(posts[following_user_id])

    return {'feed': user_feed}, 200


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

import java.util.*;

class User {
    private String userId;
    private String username;
    private String password;
    // other user attributes
    
    public User(String userId, String username, String password) {
        this.userId = userId;
        this.username = username;
        this.password = password;
        // initialize other attributes
    }
    
    // Getters and setters for attributes
    // ...
}

class Post {
    private String postId;
    private User user;
    private String caption;
    // other post attributes
    
    public Post(String postId, User user, String caption) {
        this.postId = postId;
        this.user = user;
        this.caption = caption;
        // initialize other attributes
    }
    
    // Getters and setters for attributes
    // ...
}

class ShareChat {
    private Map<String, User> users;
    private List<Post> posts;
    
    public ShareChat() {
        this.users = new HashMap<>();
        this.posts = new ArrayList<>();
    }
    
    public void addUser(User user) {
        users.put(user.getUserId(), user);
    }
    
    public User getUserById(String userId) {
        return users.get(userId);
    }
    
    public void createPost(String userId, String caption) {
        User user = getUserById(userId);
        
        if (user == null) {
            System.out.println("User not found");
            return;
        }
        
        String postId = generatePostId(); // Generate a unique post ID
        Post post = new Post(postId, user, caption);
        posts.add(post);
        
        // Additional logic to update user's feed, notify followers, etc.
        // ...
    }
    
    // Additional methods for handling likes, comments, follow/unfollow, etc.
    // ...
}

public class Main {
    public static void main(String[] args) {
        ShareChat shareChat = new ShareChat();
        
        User user1 = new User("1", "Alice", "password");
        User user2 = new User("2", "Bob", "password");
        
        shareChat.addUser(user1);
        shareChat.addUser(user2);
        
        shareChat.createPost("1", "Hello, world!");
        
        // Additional calls to other methods and functionalities
        // ...
    }
}

from flask import Flask, request

app = Flask(__name__)

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

# Endpoint for retrieving a user's information
@app.route('/users/<username>', methods=['GET'])
def get_user(username):
    if username in users:
        return users[username], 200
    else:
        return "User not found", 404

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

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

# Endpoint for creating a post
@app.route('/users/<username>/posts', methods=['POST'])
def create_post(username):
    if username in users:
        caption = request.json.get('caption')
        image_url = request.json.get('image_url')
        timestamp = request.json.get('timestamp')
        post

User Management API:

Endpoint: /users
Methods:
POST: Create a new user account
GET: Retrieve user information
PUT: Update user profile
DELETE: Delete user account

Content Management API:

Endpoint: /posts
Methods:
POST: Create a new post
GET: Retrieve post information
PUT: Update post content
DELETE: Delete a post

Social Interactions API:

Endpoint: /posts/{post_id}/likes

Methods:

POST: Like a post
DELETE: Unlike a post
Endpoint: /posts/{post_id}/comments

Methods:

POST: Add a comment to a post
GET: Retrieve comments for a post
PUT: Update a comment
DELETE: Delete a comment
Endpoint: /users/{user_id}/friendship

Methods:

POST: Send a friend request
PUT: Accept or reject a friend request
DELETE: Unfriend a user

Trending Topics API:

Endpoint: /topics
Methods:
GET: Retrieve trending topics
POST: Create a new topic
DELETE: Remove a topic

from flask import Flask, request, jsonify

app = Flask(__name__)

# User Management API
users = {}

@app.route('/users', methods=['POST'])
def create_user():
    user_data = request.get_json()
    user_id = user_data['user_id']
    
    if user_id in users:
        return jsonify({"error": "User already exists"})
    
    users[user_id] = {
        "name": user_data['name'],
        "email": user_data['email'],
        # Additional user data
    }
    
    return jsonify({"message": "User created successfully"})

@app.route('/users/<user_id>', methods=['GET'])
def get_user(user_id):
    if user_id not in users:
        return jsonify({"error": "User not found"})
    
    return jsonify(users[user_id])

@app.route('/users/<user_id>', methods=['PUT'])
def update_user(user_id):
    if user_id not in users:
        return jsonify({"error": "User not found"})
    
    user_data = request.get_json()
    users[user_id].update(user_data)
    
    return jsonify({"message": "User profile updated successfully"})

@app.route('/users/<user_id>', methods=['DELETE'])
def delete_user(user_id):
    if user_id not in users:
        return jsonify({"error": "User not found"})
    
    del users[user_id]
    
    return jsonify({"message": "User deleted successfully"})

# Content Management API
posts = {}

@app.route('/posts', methods=['POST'])
def create_post():
    post_data = request.get_json()
    post_id = post_data['post_id']
    
    if post_id in posts:
        return jsonify({"error": "Post already exists"})
    
    posts[post_id] = {
        "content": post_data['content'],
        "user_id": post_data['user_id'],
        # Additional post data
    }
    
    return jsonify({"message": "Post created successfully"})

@app.route('/posts/<post_id>', methods=['GET'])
def get_post(post_id):
    if post_id not in posts:
        return jsonify({"error": "Post not found"})
    
    return jsonify(posts[post_id])

@app.route('/posts/<post_id>', methods=['PUT'])
def update_post(post_id):
    if post_id not in posts:
        return jsonify({"error": "Post not found"})
    
    post_data = request.get_json()
    posts[post_id].update(post_data)
    
    return jsonify({"message": "Post content updated successfully"})

@app.route('/posts/<post_id>', methods=['DELETE'])
def delete_post(post_id):
    if post_id not in posts:
        return jsonify({"error": "Post not found"})
    
    del posts[post_id]
    
    return jsonify({"message": "Post deleted successfully"})

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

from flask import Flask, request, jsonify

app = Flask(__name__)

# Multilingual Support
@app.route('/posts', methods=['POST'])
def create_post():
    post_data = request.get_json()
    content = post_data['content']
    language = post_data['language']
    
    # Code to process and store the post in the specified language
    
    return jsonify({"message": "Post created successfully"})

# Content Discovery
@app.route('/posts/<user_id>/recommendations', methods=['GET'])
def get_content_recommendations(user_id):
    # Code to retrieve personalized content recommendations for the user
    
    recommendations = [
        {"post_id": 1, "content": "Recommended post 1"},
        {"post_id": 2, "content": "Recommended post 2"},
        {"post_id": 3, "content": "Recommended post 3"}
    ]
    
    return jsonify(recommendations)

# User Profiles
user_profiles = {}

@app.route('/users/<user_id>/profile', methods=['GET'])
def get_user_profile(user_id):
    if user_id not in user_profiles:
        return jsonify({"error": "User profile not found"})
    
    return jsonify(user_profiles[user_id])

@app.route('/users/<user_id>/profile', methods=['PUT'])
def update_user_profile(user_id):
    if user_id not in user_profiles:
        return jsonify({"error": "User profile not found"})
    
    profile_data = request.get_json()
    user_profiles[user_id].update(profile_data)
    
    return jsonify({"message": "User profile updated successfully"})

# Social Interactions
likes = {}

@app.route('/posts/<post_id>/likes', methods=['POST'])
def like_post(post_id):
    user_id = request.get_json()['user_id']
    
    if post_id not in likes:
        likes[post_id] = set()
    
    likes[post_id].add(user_id)
    
    return jsonify({"message": "Post liked successfully"})

@app.route('/posts/<post_id>/likes', methods=['GET'])
def get_likes(post_id):
    if post_id not in likes:
        return jsonify([])
    
    return jsonify(list(likes[post_id]))

# Trending Topics
trending_topics = []

@app.route('/topics', methods=['GET'])
def get_trending_topics():
    return jsonify(trending_topics)

@app.route('/topics', methods=['POST'])
def add_trending_topic():
    topic_data = request.get_json()
    topic = topic_data['topic']
    
    trending_topics.append(topic)
    
    return jsonify({"message": "Trending topic added successfully"})

# Rich Media Support
@app.route('/posts', methods=['POST'])
def create_post_with_media():
    post_data = request.get_json()
    content = post_data['content']
    media = post_data['media']
    
    # Code to process and store the post with media
    
    return jsonify({"message": "Post with media created successfully"})

# Reporting and Moderation
reports = {}

@app.route('/posts/<post_id>/report', methods=['POST'])
def report_post(post_id):
    user_id = request.get_json()['user_id']
    
    if post_id not in reports:
        reports[post_id] = set()
    
    reports[post_id].add(user_id)
    
    return jsonify({"message": "Post reported successfully"})

@app.route('/posts/<post_id>/report', methods=['GET'])
def get_reports(post_id):
    if post_id not in reports:
        return jsonify([])
    
    return jsonify(list(reports[post_id]))

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

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

    def register_user(self, username, email, password):
        if email in self.users:
            return "Email already registered."
        user_id = len(self.users) + 1
        self.users[email] = {
            "user_id": user_id,
            "username": username,
            "password": password
        }
        return "User registered successfully."

    def login(self, email, password):
        if email in self.users and self.users[email]["password"] == password:
            return "Login successful."
        return "Invalid credentials."

class ContentService:
    def __init__(self):
        self.content = {}

    def add_content(self, content_id, title, description, duration, release_date):
        if content_id in self.content:
            return "Content ID already exists."
        self.content[content_id] = {
            "title": title,
            "description": description,
            "duration": duration,
            "release_date": release_date
        }
        return "Content added successfully."

    def get_content(self, content_id):
        if content_id in self.content:
            return self.content[content_id]
        return "Content not found."

class PlaylistService:
    def __init__(self):
        self.playlists = {}

    def create_playlist(self, user_id, playlist_id, name):
        if user_id not in self.playlists:
            self.playlists[user_id] = {}
        if playlist_id in self.playlists[user_id]:
            return "Playlist ID already exists."
        self.playlists[user_id][playlist_id] = {
            "name": name,
            "content": []
        }
        return "Playlist created successfully."

    def add_content_to_playlist(self, user_id, playlist_id, content_id):
        if user_id not in self.playlists or playlist_id not in self.playlists[user_id]:
            return "Playlist not found."
        self.playlists[user_id][playlist_id]["content"].append(content_id)
        return "Content added to playlist successfully."

    def remove_content_from_playlist(self, user_id, playlist_id, content_id):
        if user_id not in self.playlists or playlist_id not in self.playlists[user_id]:
            return "Playlist not found."
        if content_id in self.playlists[user_id][playlist_id]["content"]:
            self.playlists[user_id][playlist_id]["content"].remove(content_id)
            return "Content removed from playlist successfully."
        return "Content not found in playlist."

class RecommendationService:
    def __init__(self):
        self.user_preferences = {}

    def update_preferences(self, user_id, preferences):
        self.user_preferences[user_id] = preferences

    def get_recommendations(self, user_id):
        if user_id in self.user_preferences:
            # Logic for generating personalized recommendations based on preferences
            recommendations = generate_recommendations(self.user_preferences[user_id])
            return recommendations
        return []

class PlaybackService:
    def start_playback(self, content_id):
        # Logic for starting content playback
        pass

    def pause_playback(self, content_id):
        # Logic for pausing content playback
        pass

    def seek_playback(self, content_id, position):
        # Logic for seeking content playback to a specific position
        pass

    def stop_playback(self, content_id):
        # Logic for stopping content playback
        pass

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

class Video:
    def __init__(self, video_id, title, url):
        self.video_id = video_id
        self.title = title
        self.url = url
        # Other video attributes

class Playlist:
    def __init__(self, playlist_id, name, user):
        self.playlist_id = playlist_id
        self.name = name
        self.user = user
        self.videos = []
        # Other playlist attributes

class Hulu:
    def __init__(self):
        self.users = {}
        self.videos = {}
        self.playlists = {}

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

    def create_video(self, video_id, title, url):
        video = Video(video_id, title, url)
        self.videos[video_id] = video

    def create_playlist(self, playlist_id, name, user_id):
        user = self.users.get(user_id)
        if user:
            playlist = Playlist(playlist_id, name, user)
            self.playlists[playlist_id] = playlist

    def add_video_to_playlist(self, playlist_id, video_id):
        playlist = self.playlists.get(playlist_id)
        video = self.videos.get(video_id)
        if playlist and video:
            playlist.videos.append(video)

    # Other methods for accessing and manipulating user, video, and playlist data

User Management API:

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

Video Management API:

POST /videos: Upload a new video.
GET /videos/{video_id}: Get video information by video ID.
DELETE /videos/{video_id}: Delete a video by video ID.

Playlist Management API:

POST /playlists: Create a new playlist.
GET /playlists/{playlist_id}: Get playlist information by playlist ID.
PATCH /playlists/{playlist_id}: Update playlist information by playlist ID.
POST /playlists/{playlist_id}/videos: Add a video to a playlist.
DELETE /playlists/{playlist_id}/videos/{video_id}: Remove a video from a playlist.

Playback API:

POST /playback/{video_id}/start: Start playback of a video.
POST /playback/{video_id}/pause: Pause playback of a video.
POST /playback/{video_id}/seek: Seek to a specific position in a video.
POST /playback/{video_id}/stop: Stop playback of a video.

Recommendation API:

GET /recommendations/{user_id}: Get personalized video recommendations for a user.
Search API:

GET /search?q={query}: Search for videos based on a query.

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data to be stored in the server
users = {
    "user1": {
        "username": "john_doe",
        "password": "password123"
    },
    "user2": {
        "username": "jane_smith",
        "password": "password456"
    }
}

videos = {
    "video1": {
        "title": "Video 1",
        "url": "https://example.com/videos/video1.mp4"
    },
    "video2": {
        "title": "Video 2",
        "url": "https://example.com/videos/video2.mp4"
    }
}

playlists = {
    "playlist1": {
        "name": "Playlist 1",
        "videos": ["video1", "video2"]
    }
}

# User Management API
@app.route("/users", methods=["POST"])
def create_user():
    data = request.json
    username = data.get("username")
    password = data.get("password")

    if username and password:
        user_id = "user" + str(len(users) + 1)
        users[user_id] = {"username": username, "password": password}
        return {"message": "User created successfully"}, 201
    else:
        return {"message": "Invalid username or password"}, 400

@app.route("/users/<user_id>", methods=["GET"])
def get_user(user_id):
    if user_id in users:
        return users[user_id], 200
    else:
        return {"message": "User not found"}, 404

@app.route("/users/<user_id>", methods=["PATCH"])
def update_user(user_id):
    if user_id in users:
        data = request.json
        username = data.get("username")
        password = data.get("password")

        if username:
            users[user_id]["username"] = username
        if password:
            users[user_id]["password"] = password

        return {"message": "User updated successfully"}, 200
    else:
        return {"message": "User not found"}, 404

# Video Management API
@app.route("/videos", methods=["POST"])
def upload_video():
    data = request.json
    title = data.get("title")
    url = data.get("url")

    if title and url:
        video_id = "video" + str(len(videos) + 1)
        videos[video_id] = {"title": title, "url": url}
        return {"message": "Video uploaded successfully"}, 201
    else:
        return {"message": "Invalid video title or URL"}, 400

@app.route("/videos/<video_id>", methods=["GET"])
def get_video(video_id):
    if video_id in videos:
        return videos[video_id], 200
    else:
        return {"message": "Video not found"}, 404

@app.route("/videos/<video_id>", methods=["DELETE"])
def delete_video(video_id):
    if video_id in videos:
        del videos[video_id]
        return {"message": "Video deleted successfully"}, 200
    else:
        return {"message": "Video not found"}, 404

# Playlist Management API
@app.route("/playlists", methods=["POST"])
def create_playlist():
    data = request.json
    name = data.get("name")

    if name:
        playlist_id = "playlist" + str(len(playlists) + 1)
        playlists[playlist_id] = {"name": name, "videos": []}
        return {"message": "Playlist created successfully"}, 201
    else:
        return {"message": "Invalid playlist name"}, 400

@app.route("/playlists/<playlist_id>", methods=["GET"])
def get_playlist(playlist_id):
    if playlist_id in playlists:
        return playlists[playlist_id], 200
    else:
        return {"message": "Playlist not found"}, 404

@app.route("/playlists/<playlist_id>", methods=["PATCH"])
def update_playlist(playlist_id):
    if playlist_id in playlists:
        data = request.json
        name = data.get("name")

        if name:
            playlists[playlist_id]["name"] = name

        return {"message": "Playlist updated successfully"}, 200
    else:
        return {"message": "Playlist not found"}, 404

@app.route("/playlists/<playlist_id>/videos", methods=["POST"])
def add_video_to_playlist(playlist_id):
    if playlist_id in playlists:
        data = request.json
        video_id = data.get("video_id")

        if video_id in videos:
            playlists[playlist_id]["videos"].append(video_id)
            return {"message": "Video added to playlist"}, 200
        else:
            return {"message": "Video not found"}, 404
    else:
        return {"message": "Playlist not found"}, 404

@app.route("/playlists/<playlist_id>/videos/<video_id>", methods=["DELETE"])
def remove_video_from_playlist(playlist_id, video_id):
    if playlist_id in playlists and video_id in videos:
        if video_id in playlists[playlist_id]["videos"]:
            playlists[playlist_id]["videos"].remove(video_id)
            return {"message": "Video removed from playlist"}, 200
        else:
            return {"message": "Video not found in playlist"}, 404
    else:
        return {"message": "Playlist or video not found"}, 404

# Run the Flask app```python
if __name__ == "__main__":
    app.run()

class UserAPI:
    def __init__(self):
        self.users = {}
        self.current_user = None

    def register_user(self, name, email, password):
        if email in self.users:
            return "Email already registered."

        user_id = generate_user_id()
        self.users[email] = {
            "user_id": user_id,
            "name": name,
            "email": email,
            "password": password,
            "profile": {
                "preferences": {},
            },
        }
        return "Registration successful."

    def login_user(self, email, password):
        if email in self.users and self.users[email]["password"] == password:
            self.current_user = email
            return "Login successful."
        return "Invalid email or password."

    def get_user_profile(self, user_id):
        if self.current_user and self.users[self.current_user]["user_id"] == user_id:
            return self.users[self.current_user]["profile"]
        return "Unauthorized access."

# Helper function to generate a unique user ID
def generate_user_id():
    # Implementation details of generating a unique user ID
    pass

class ContentAPI:
    def __init__(self):
        self.content = {}

    def upload_content(self, file, metadata):
        content_id = generate_content_id()
        self.content[content_id] = {
            "file": file,
            "metadata": metadata
        }
        return content_id

    def get_content(self, content_id):
        if content_id in self.content:
            return self.content[content_id]
        return "Content not found."

    def search_content(self, query):
        results = []
        for content_id, content_data in self.content.items():
            metadata = content_data["metadata"]
            if query in metadata:
                results.append({
                    "content_id": content_id,
                    "metadata": metadata
                })
        return results

# Helper function to generate a unique content ID
def generate_content_id():
    # Implementation details of generating a unique content ID
    pass

class ContentLibrary:
    def __init__(self):
        self.content = []

    def add_content(self, content):
        self.content.append(content)

    def get_all_content(self):
        return self.content

    def search_content(self, query):
        results = []
        for content in self.content:
            if query.lower() in content.title.lower():
                results.append(content)
        return results

class RecommendationEngine:
    def __init__(self):
        self.user_preferences = {}

    def update_user_preferences(self, user_id, preferences):
        self.user_preferences[user_id] = preferences

    def get_recommendations(self, user_id):
        preferences = self.user_preferences.get(user_id)
        if preferences:
            # Logic for generating personalized recommendations based on preferences and viewing history
            recommendations = generate_recommendations(preferences)
            return recommendations
        return []

class User:
    def __init__(self, user_id, name):
        self.user_id = user_id
        self.name = name
        self.profiles = []

    def create_profile(self, profile_name):
        profile = Profile(profile_name)
        self.profiles.append(profile)

    def get_profiles(self):
        return self.profiles

class Profile:
    def __init__(self, name):
        self.name = name

# Usage:
user = User("user123", "John")
user.create_profile("Profile 1")
user.create_profile("Profile 2")
profiles = user.get_profiles()

class LiveTVStreaming:
    def __init__(self):
        self.channels = []

    def add_channel(self, channel):
        self.channels.append(channel)

    def get_all_channels(self):
        return self.channels

# Usage:
tv_streaming = LiveTVStreaming()
tv_streaming.add_channel("NBC")
tv_streaming.add_channel("CNN")
channels = tv_streaming.get_all_channels()

class SubscriptionPlan:
    def __init__(self, name, is_ad_supported):
        self.name = name
        self.is_ad_supported = is_ad_supported

# Usage:
ad_supported_plan = SubscriptionPlan("Ad-supported Plan", True)
ad_free_plan = SubscriptionPlan("Ad-free Plan", False)

class OfflineDownloads:
    def __init__(self):
        self.downloads = []

    def download_content(self, content):
        self.downloads.append(content)

    def get_all_downloads(self):
        return self.downloads

# Usage:
offline_downloads = OfflineDownloads()
offline_downloads.download_content("Movie 1")
offline_downloads.download_content("TV Show 2")
downloads = offline_downloads.get_all_downloads()