from collections import defaultdict

def map_func(inputs):
    results = defaultdict(list)
    for input in inputs:
        words = input.split()
        for word in words:
            results[word].append(1)
    return results.items()

def reduce_func(item):
    word, occurrences = item
    return (word, sum(occurrences))

def map_reduce(inputs):
    mapped = map_func(inputs)
    grouped = defaultdict(list)
    for key, value in mapped:
        grouped[key].append(value)
    return [reduce_func(group) for group in grouped.items()]

inputs = ["apple pear banana", "pear banana", "apple pear", "apple", "pear banana apple"]
print(map_reduce(inputs))

import flask
from flask import request

app = flask.Flask(__name__)

# Example video metadata
videos = [
    {"id": 1, "title": "Video 1", "description": "Description for video 1", "tags": ["tag1", "tag2"]},
    {"id": 2, "title": "Video 2", "description": "Description for video 2", "tags": ["tag3", "tag4"]}
]

# Get all videos
@app.route("/videos", methods=["GET"])
def get_videos():
    return {"videos": videos}

# Get a specific video by id
@app.route("/videos/<int:id>", methods=["GET"])
def get_video(id):
    for video in videos:
        if video["id"] == id:
            return {"video": video}
    return {"error": "Video not found"}, 404

# Add a new video
@app.route("/videos", methods=["POST"])
def add_video():
    video = request.get_json()
    videos.append(video)
    return {"message": "Video added successfully"}

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

import flask
from flask import request

app = flask.Flask(__name__)

# Example comments data
comments = [
    {"id": 1, "video_id": 1, "comment": "Comment 1 for video 1", "username": "user1"},
    {"id": 2, "video_id": 2, "comment": "Comment 1 for video 2", "username": "user2"}
]

# Get all comments for a specific video
@app.route("/comments", methods=["GET"])
def get_comments():
    video_id = request.args.get("video_id")
    video_comments = [comment for comment in comments if comment["video_id"] == int(video_id)]
    return {"comments": video_comments}

# Add a new comment
@app.route("/comments", methods=["POST"])
def add_comment():
    comment = request.get_json()
    comments.append(comment)
    return {"message": "Comment added successfully"}

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

# User Service 

from flask import Flask, jsonify, request

app = Flask(__name__)

# Create a dictionary to store the user information
users = {}

# Endpoint to create a new user
@app.route("/users", methods=["POST"])
def create_user():
    # Get the user information from the request body
    data = request.get_json()
    user_id = len(users) + 1
    name = data.get("name")
    email = data.get("email")
    
    # Store the user information in the users dictionary
    users[user_id] = {
        "id": user_id,
        "name": name,
        "email": email
    }
    
    return jsonify({"message": "User created successfully!"})

# Endpoint to get a user's information by their id
@app.route("/users/<int:user_id>", methods=["GET"])
def get_user(user_id):
    user = users.get(user_id)
    
    if user:
        return jsonify(user)
    else:
        return jsonify({"message": "User not found"}), 404

# Endpoint to update a user's information by their id
@app.route("/users/<int:user_id>", methods=["PUT"])
def update_user(user_id):
    user = users.get(user_id)
    
    if user:
        data = request.get_json()
        name = data.get("name")
        email = data.get("email")
        
        user["name"] = name
        user["email"] = email
        
        return jsonify({"message": "User updated successfully!"})
    else:
        return jsonify({"message": "User not found"}), 404

# Endpoint to delete a user by their id
@app.route("/users/<int:user_id>", methods=["DELETE"])
def delete_user(user_id):
    user = users.get(user_id)
    
    if user:
        del users[user_id]
        return jsonify({"message": "User deleted successfully!"})
    else:
        return jsonify({"message": "User not found"}), 404

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

import java.util.*;

class User {
    private String username;
    private String password;
    private List<Video> videos;
    // ...

    public User(String username, String password) {
        this.username = username;
        this.password = password;
        this.videos = new ArrayList<>();
    }

    // Getters and setters
    // ...
}

class Video {
    private String videoId;
    private String title;
    private String description;
    private User uploader;
    private List<Comment> comments;
    // ...

    public Video(String videoId, String title, String description, User uploader) {
        this.videoId = videoId;
        this.title = title;
        this.description = description;
        this.uploader = uploader;
        this.comments = new ArrayList<>();
    }

    // Getters and setters
    // ...
}

class Comment {
    private String commentId;
    private String text;
    private User commenter;
    // ...

    public Comment(String commentId, String text, User commenter) {
        this.commentId = commentId;
        this.text = text;
        this.commenter = commenter;
    }

    // Getters and setters
    // ...
}

class YouTubeSystem {
    private List<User> users;
    private List<Video> videos;
    // ...

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

    public void registerUser(String username, String password) {
        User newUser = new User(username, password);
        users.add(newUser);
        System.out.println("User registered successfully.");
    }

    public void uploadVideo(String username, String videoId, String title, String description) {
        User uploader = findUserByUsername(username);
        if (uploader != null) {
            Video newVideo = new Video(videoId, title, description, uploader);
            uploader.getVideos().add(newVideo);
            videos.add(newVideo);
            System.out.println("Video uploaded successfully.");
        } else {
            System.out.println("User not found.");
        }
    }

    public void addComment(String videoId, String commenterUsername, String commentId, String text) {
        Video video = findVideoById(videoId);
        User commenter = findUserByUsername(commenterUsername);
        if (video != null && commenter != null) {
            Comment newComment = new Comment(commentId, text, commenter);
            video.getComments().add(newComment);
            System.out.println("Comment added successfully.");
        } else {
            System.out.println("Video or commenter not found.");
        }
    }

    public User findUserByUsername(String username) {
        for (User user : users) {
            if (user.getUsername().equals(username)) {
                return user;
            }
        }
        return null;
    }

    public Video findVideoById(String videoId) {
        for (Video video : videos) {
            if (video.getVideoId().equals(videoId)) {
                return video;
            }
        }
        return null;
    }
}

public class YouTubeApp {
    public static void main(String[] args) {
        YouTubeSystem youtube = new YouTubeSystem();

        // Register users
        youtube.registerUser("user1", "password1");
        youtube.registerUser("user2", "password2");

        // Upload videos
        youtube.uploadVideo("user1", "video1", "Video 1", "Description 1");
        youtube.uploadVideo("user2", "video2", "Video 2", "Description 2");

        // Add comments
        youtube.addComment("video1", "user2", "comment1", "Comment 1 on video 1");
        youtube.addComment("video2", "user1", "comment2", "Comment 2 on video 2");
    }
}

from flask import Flask, jsonify, request
import googleapiclient.discovery
import googleapiclient.errors

app = Flask(__name__)

# Initialize YouTube API client
api_service_name = "youtube"
api_version = "v3"
DEVELOPER_KEY = "YOUR_API_KEY"
youtube = googleapiclient.discovery.build(api_service_name, api_version, developerKey=DEVELOPER_KEY)

# Endpoint for searching YouTube videos
@app.route('/search', methods=['GET'])
def search_videos():
    # Get query from request parameters
    query = request.args.get('q')
    
    # Send request to YouTube API and get search results
    request = youtube.search().list(
        part="id,snippet",
        type="video",
        q=query,
        maxResults=10
    )
    response = request.execute()
    
    # Return list of videos
    videos = []
    for item in response['items']:
        video = {
            'id': item['id']['videoId'],
            'title': item['snippet']['title'],
            'description': item['snippet']['description']
        }
        videos.append(video)
    return jsonify(videos)

# Endpoint for getting details of a specific YouTube video
@app.route('/videos/<video_id>', methods=['GET'])
def get_video_details(video_id):
    # Send request to YouTube API and get video details
    request = youtube.videos().list(
        part="id,snippet",
        id=video_id
    )
    response = request.execute()
    
    # Return video details
    item = response['items'][0]
    video = {
        'id': item['id'],
        'title': item['snippet']['title'],
        'description': item['snippet']['description'],
        'tags': item['snippet']['tags']
    }
    return jsonify(video)

# Endpoint for getting comments of a specific YouTube video
@app.route('/videos/<video_id>/comments', methods=['GET'])
def get_video_comments(video_id):
    # Send request to YouTube API and get comments
    request = youtube.commentThreads().list(
        part="snippet",
        videoId=video_id,
        textFormat="plainText",
        maxResults=10
    )
    response = request.execute()
    
    # Return list of comments
    comments = []
    for item in response['items']:
        comment = {
            'id': item['id'],
            'author': item['snippet']['topLevelComment']['snippet']['authorDisplayName'],
            'text': item['snippet']['topLevelComment']['snippet']['textDisplay']
        }
        comments.append(comment)
    return jsonify(comments)

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

import requests

# Define the API endpoint for retrieving videos
endpoint = "https://www.googleapis.com/youtube/v3/videos"

# Define the API key for accessing the YouTube API
api_key = "YOUR_API_KEY"

# Define the parameters for the API request
params = {
    "part": "snippet,statistics",
    "id": "video_id",
    "key": api_key
}

# Send the API request to retrieve video data
response = requests.get(endpoint, params=params)

# Check if the API request was successful
if response.status_code == 200:
    # Parse the JSON data from the API response
    data = response.json()
    # Access the video data
    video_data = data.get("items", [])[0]
    # Access the video title and view count
    video_title = video_data.get("snippet", {}).get("title", "")
    video_view_count = video_data.get("statistics", {}).get("viewCount", 0)
    # Print the video title and view count
    print("Title: {}".format(video_title))
    print("View Count: {}".format(video_view_count))
else:
    # Print an error message if the API request was not successful
    print("Request failed with status code {}".format(response.status_code))

import os
import google.auth
from googleapiclient.discovery import build
from googleapiclient.errors import HttpError
from google.oauth2.credentials import Credentials

# Set the API service name and version
API_SERVICE_NAME = 'youtube'
API_VERSION = 'v3'

# Authenticate and build the API client
credentials, project_id = google.auth.default(
    scopes=['https://www.googleapis.com/auth/youtube.upload']
)
youtube = build(API_SERVICE_NAME, API_VERSION, credentials=credentials)

# Define the video metadata
video = {
    'snippet': {
        'title': 'My Video Title',
        'description': 'This is a description of my video',
        'tags': ['tag1', 'tag2', 'tag3'],
        'categoryId': '22'
    },
    'status': {
        'privacyStatus': 'public',
        'embeddable': True,
        'license': 'youtube'
    }
}

# Define the path to the video file
file_path = 'path/to/video.mp4'

# Call the API to upload the video
try:
    request = youtube.videos().insert(
        part='snippet,status',
        body=video,
        media_body=MediaFileUpload(file_path)
    )
    response = request.execute()
    print(f'Video uploaded: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

import webbrowser

# Define the video ID
video_id = 'abcdefghijk'

# Open the video in the default web browser
webbrowser.open(f'https://www.youtube.com/watch?v={video_id}')

# Define the video ID and the comment text
video_id = 'abcdefghijk'
comment_text = 'This is my comment on the video'

# Define the activity metadata
activity = {
    'snippet': {
        'activityType': 'post',
        'channelId': 'my_channel_id',
        'description': comment_text,
        'resourceId': {
            'kind': 'youtube#video',
            'videoId': video_id
        }
    }
}

# Call the API to post the comment
try:
    request = youtube.activities().insert(
        part='snippet',
        body=activity
    )
    response = request.execute()
    print(f'Comment posted: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the video ID and the rating
video_id = 'abcdefghijk'
rating = 'like'

# Define the video ID and the report reasons
video_id = 'abcdefghijk'
reasons = ['hate', 'violence']

# Call the API to report the video
try:
    request = youtube.videos().reportAbuse(
        videoId=video_id,
        body={
            'reasons': reasons,
            'comments': 'This video is inappropriate because...',
            'language': 'en'
        }
    )
    response = request.execute()
    print(f'Video reported: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the video ID and the start and end dates for the analytics data
video_id = 'abcdefghijk'
start_date = '2022-01-01'
end_date = '2022-02-01'

# Call the API to get the analytics data for the video
try:
    request = youtube.reports().query(
        dimensions='video',
        filters=f'video=={video_id}',
        startDate=start_date,
        endDate=end_date,
        metrics='views,likes,dislikes,comments',
        sort='views'
    )
    response = request.execute()
    print(f'Analytics for video {video_id}: {response["rows"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the playlist metadata
playlist = {
    'snippet': {
        'title': 'My Playlist',
        'description': 'This is a description of my playlist'
    },
    'status': {
        'privacyStatus': 'public'
    }
}

# Call the API to create the playlist
try:
    request = youtube.playlists().insert(
        part='snippet,status',
        body=playlist
    )
    response = request.execute()
    print(f'Playlist created: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the channel metadata
channel = {
    'snippet': {
        'title': 'My Channel',
        'description': 'This is a description of my channel'
    },
    'status': {
        'privacyStatus': 'public'
    }
}

# Call the API to create the channel
try:
    request = youtube.channels().insert(
        part='snippet,status',
        body=channel
    )
    response = request.execute()
    print(f'Channel created: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the search query
search_query = 'python programming'

# Call the API to search for videos
try:
    request = youtube.search().list(
        q=search_query,
        part='id,snippet',
        type='video'
    )
    response = request.execute()
    for item in response['items']:
        print(f'Title: {item["snippet"]["title"]}')
        print(f'Video ID: {item["id"]["videoId"]}')
        print(f'Description: {item["snippet"]["description"]}')
        print('----------------------------------------------')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the video ID and the ID of the "Watch Later" playlist
video_id = 'abcdefghijk'
playlist_id = '1234567890'

# Call the API to add the video to the "Watch Later" playlist
try:
    request = youtube.playlistItems().insert(
        part='snippet',
        body={
            'snippet': {
                'playlistId': playlist_id,
                'resourceId': {
                    'kind': 'youtube#video',
                    'videoId': video_id
                }
            }
        }
    )
    response = request.execute()
    print(f'Video added to "Watch Later" playlist: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the video ID and the ID of the "Favorites" playlist
video_id = 'abcdefghijk'
playlist_id = '0987654321'

# Call the API to add the video to the "Favorites" playlist
try:
    request = youtube.playlistItems().insert(
        part='snippet',
        body={
            'snippet': {
                'playlistId': playlist_id,
                'resourceId': {
                    'kind': 'youtube#video',
                    'videoId': video_id
                }
            }
        }
    )
    response = request.execute()
    print(f'Video added to "Favorites" playlist: {response["id"]}')
except HttpError as error:
    print(f'An error occurred: {error}')
    response = None

# Define the comment ID to delete
comment_id = 'abcdefghijk'

# Call the API to delete the comment
try:
    request = youtube.comments().delete(
        id=comment_id
    )
    request.execute()
    print(f'Comment deleted: {comment_id}')
except HttpError as error:
    print(f'An error occurred: {error}')

# Define the video ID to delete
video_id = 'abcdefghijk'

# Call the API to delete the video
try:
    request = youtube.videos().delete(
        id=video_id
    )
    request.execute()
    print(f'Video deleted: {video_id}')
except HttpError as error:
    print(f'An error occurred: {error}')

# Define the video ID to unlike
video_id = 'abcdefghijk'

# Call the API to unlike the video
try:
    request = youtube.videos().rate(
        id=video_id,
        rating='none'
    )
    request.execute()
    print(f'Video unliked: {video_id}')
except HttpError as error:
    print(f'An error occurred: {error}')

# Define the comment ID to delete
comment_id = 'abcdefghijk'

# Call the API to delete the comment
try:
    request = youtube.comments().delete(
        id=comment_id
    )
    request.execute()
    print(f'Comment deleted: {comment_id}')
except HttpError as error:
    print(f'An error occurred: {error}')

from moviepy.editor import VideoFileClip

def upload_video(file_path):
    # Code for uploading the video file to a storage system
    # ...

def encode_video(file_path, output_format='mp4', resolution='720p'):
    # Code for video encoding and transcoding
    clip = VideoFileClip(file_path)
    clip_resized = clip.resize(resolution)
    output_path = f'encoded_video.{output_format}'
    clip_resized.write_videofile(output_path)
    return output_path

def extract_metadata(file_path):
    # Code for extracting and storing video metadata
    clip = VideoFileClip(file_path)
    duration = clip.duration
    resolution = clip.size
    # Store the metadata in a database or file system
    # ...

import boto3

def store_video(file_path, bucket_name, object_name):
    s3 = boto3.client('s3')
    s3.upload_file(file_path, bucket_name, object_name)

def get_video_url(bucket_name, object_name):
    s3 = boto3.client('s3')
    signed_url = s3.generate_presigned_url(
        'get_object',
        Params={'Bucket': bucket_name, 'Key': object_name},
        ExpiresIn=3600
    )
    return signed_url

def replicate_video(bucket_name, object_name, destination_bucket):
    s3 = boto3.client('s3')
    s3.copy_object(
        Bucket=destination_bucket,
        CopySource={'Bucket': bucket_name, 'Key': object_name},
        Key=object_name
    )

from elasticsearch import Elasticsearch

def index_video_metadata(video_id, metadata):
    es = Elasticsearch()
    es.index(index='videos', id=video_id, body=metadata)

def search_videos(query):
    es = Elasticsearch()
    search_result = es.search(index='videos', body={'query': {'match': {'title': query}}})
    hits = search_result['hits']['hits']
    return [hit['_source'] for hit in hits]

def filter_videos(attribute, value):
    es = Elasticsearch()
    search_result = es.search(index='videos', body={'query': {'term': {attribute: value}}})
    hits = search_result['hits']['hits']
    return [hit['_source'] for hit in hits]

import pygame
import time

def play_video(video_file):
    pygame.init()
    pygame.mixer.quit()  # Disable audio to focus on video playback
    screen = pygame.display.set_mode((800, 600))
    pygame.display.set_caption("Video Player")

    video = pygame.movie.Movie(video_file)
    video.set_display(screen, pygame.Rect(0, 0, 800, 600))
    video.play()

    clock = pygame.time.Clock()
    running = True
    while running:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False
                break

        if video.get_busy():
            screen.fill((0, 0, 0))
            video_screen = pygame.Surface((800, 600))
            video_screen = video.get_surface()
            screen.blit(video_screen, (0, 0))
            pygame.display.update()

        clock.tick(30)

    video.stop()
    pygame.quit()

# Example usage
video_file = 'sample_video.mp4'
play_video(video_file)

import pandas as pd

import pandas as pd
from sklearn.metrics.pairwise import cosine_similarity

# Sample data
videos = pd.DataFrame({'video_id': [1, 2, 3, 4],
                       'title': ['Video 1', 'Video 2', 'Video 3', 'Video 4'],
                       'category': ['Music', 'Sports', 'Music', 'Sports']})

user_preferences = pd.DataFrame({'user_id': ['user1', 'user2', 'user3'],
                                 'preferences': [['Music', 'Sports'],
                                                 ['Sports'],
                                                 ['Music', 'Sports']]})

def recommend_videos(user_id):
    user_preference = user_preferences[user_preferences['user_id'] == user_id]['preferences'].values[0]
    recommendations = {}
    for _, row in user_preferences.iterrows():
        if row['user_id'] != user_id:
            similarity = cosine_similarity([user_preference], [row['preferences']])
            recommendations[row['user_id']] = similarity[0][0]
    sorted_recommendations = sorted(recommendations.items(), key=lambda x: x[1], reverse=True)
    return sorted_recommendations

# Example usage
user_id = 'user1'
recommended_videos = recommend_videos(user_id)

class Video:
    def __init__(self, video_id, title):
        self.video_id = video_id
        self.title = title
        self.likes = 0
        self.comments = []
        self.shares = 0
        self.subscribers = 0

    def add_like(self):
        self.likes += 1

    def add_comment(self, comment):
        self.comments.append(comment)

    def add_share(self):
        self.shares += 1

    def add_subscriber(self):
        self.subscribers += 1

# Example usage
video = Video(1, 'Sample Video')
video.add_like()
video.add_comment('Great video!')
video.add_share()
video.add_subscriber()

class Ad:
    def __init__(self, ad_id, content):
        self.ad_id = ad_id
        self.content = content

    def serve_ad(self, user_id):
        # Code for serving ad to a user
        # ...

# Example usage
ad = Ad(1, 'Buy our product!')
ad.serve_ad(user_id)

class LiveStream:
    def __init__(self, stream_id):
        self.stream_id = stream_id
        self.chat_messages = []

    def send_chat_message(self, message):
        self.chat_messages.append(message)

# Example usage
stream = LiveStream(1)
stream.send_chat_message('Hello, everyone!')

def collect_user_metrics(user_id):
    # Code for collecting user metrics
    # ...

def generate_video_report(video_id):
    # Code for generating a video report
    # ...

# Example usage
user_metrics = collect_user_metrics(user_id)
video_report = generate_video_report(video_id)

class VideoUploadService:
    def __init__(self):
        self.upload_servers = ['server1', 'server2', 'server3']
        self.upload_counter = 0

    def upload_video(self, file_path):
        server = self.upload_servers[self.upload_counter % len(self.upload_servers)]
        self.upload_counter += 1
        # Code for uploading the video file to the specified server
        # ...

# Example usage
upload_service = VideoUploadService()
upload_service.upload_video(file_path)

class AnalyticsManager:
    def __init__(self):
        self.video_views = {}
        self.video_likes = {}
        self.video_comments = {}

    def track_view(self, video_id):
        if video_id in self.video_views:
            self.video_views[video_id] += 1
        else:
            self.video_views[video_id] = 1

    def track_like(self, video_id):
        if video_id in self.video_likes:
            self.video_likes[video_id] += 1
        else:
            self.video_likes[video_id] = 1

    def track_comment(self, video_id):
        if video_id in self.video_comments:
            self.video_comments[video_id] += 1
        else:
            self.video_comments[video_id] = 1

    def get_video_views(self, video_id):
        return self.video_views.get(video_id, 0)

    def get_video_likes(self, video_id):
        return self.video_likes.get(video_id, 0)

    def get_video_comments(self, video_id):
        return self.video_comments.get(video_id, 0)

# Example usage
analytics_manager = AnalyticsManager()
analytics_manager.track_view('video1')
analytics_manager.track_view('video1')
analytics_manager.track_like('video1')
analytics_manager.track_comment('video1')
views = analytics_manager.get_video_views('video1')
likes = analytics_manager.get_video_likes('video1')
comments = analytics_manager.get_video_comments('video1')

class AnalyticsTools:
    def __init__(self):
        self.analytics_manager = AnalyticsManager()

    def get_video_stats(self, video_id):
        views = self.analytics_manager.get_video_views(video_id)
        likes = self.analytics_manager.get_video_likes(video_id)
        comments = self.analytics_manager.get_video_comments(video_id)
        return {
            'views': views,
            'likes': likes,
            'comments': comments
        }

# Example usage
analytics_tools = AnalyticsTools()
video_stats = analytics_tools.get_video_stats('video1')

class LoadBalancer:
    def __init__(self, servers):
        self.servers = servers
        self.current_server_index = 0

    def distribute_request(self):
        server = self.servers[self.current_server_index]
        self.current_server_index = (self.current_server_index + 1) % len(self.servers)
        # Code for distributing the request to the selected server
        # ...

# Example usage
servers = ['server1', 'server2', 'server3']
load_balancer = LoadBalancer(servers)
load_balancer.distribute_request()

class ShardingManager:
    def __init__(self, num_shards):
        self.num_shards = num_shards
        self.shards = [[] for _ in range(num_shards)]

    def get_shard_index(self, key):
        # Code for determining the shard index based on the key
        # ...

    def add_item(self, key, value):
        shard_index = self.get_shard_index(key)
        self.shards[shard_index].append((key, value))

    def get_item(self, key):
        shard_index = self.get_shard_index(key)
        for item_key, item_value in self.shards[shard_index]:
            if item_key == key:
                return item_value
        return None

# Example usage
sharding_manager = ShardingManager(num_shards=4)
sharding_manager.add_item('key1', 'value1')
sharding_manager.add_item('key2', 'value2')
value = sharding_manager.get_item('key1')

class ReplicationManager:
    def __init__(self):
        self.replicas = []

    def add_replica(self, replica):
        self.replicas.append(replica)

    def remove_replica(self, replica):
        self.replicas.remove(replica)

    def get_replica(self):
        # Code for selecting a replica based on the replication strategy (e.g., round-robin)
        # ...

# Example usage
replica1 = 'replica1'
replica2 = 'replica2'
replica3 = 'replica3'
replication_manager = ReplicationManager()
replication_manager.add_replica(replica1)
replication_manager.add_replica(replica2)
replication_manager.add_replica(replica3)
selected_replica = replication_manager.get_replica()

import datetime

class User:
    def __init__(self, userId, username, email, password):
        self.userId = userId
        self.username = username
        self.email = email
        self.password = password
        self.balance = 0.0
        self.holdings = {}
        self.transaction_history = []

    def update_balance(self, amount):
        self.balance += amount

    def add_holding(self, currency, amount):
        if currency in self.holdings:
            self.holdings[currency] += amount
        else:
            self.holdings[currency] = amount

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

class Order:
    def __init__(self, orderId, userId, tradingPair, side, price, quantity):
        self.orderId = orderId
        self.userId = userId
        self.tradingPair = tradingPair
        self.side = side
        self.price = price
        self.quantity = quantity
        self.timestamp = datetime.datetime.now()
        self.status = "OPEN"

    def update_status(self, status):
        self.status = status

class TradingPair:
    def __init__(self, tradingPairId, pairName, currentPrice):
        self.tradingPairId = tradingPairId
        self.pairName = pairName
        self.currentPrice = currentPrice
        self.marketDepth = []

    def update_price(self, price):
        self.currentPrice = price

    def update_market_depth(self, marketDepth):
        self.marketDepth = marketDepth

class Wallet:
    def __init__(self, userId, currency):
        self.userId = userId
        self.currency = currency
        self.balance = 0.0
        self.transaction_history = []

    def update_balance(self, amount):
        self.balance += amount

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

class MarketData:
    def __init__(self, tradingPairId):
        self.tradingPairId = tradingPairId
        self.price = 0.0
        self.orderBook = []
        self.tradeHistory = []

    def update_price(self, price):
        self.price = price

    def update_order_book(self, orderBook):
        self.orderBook = orderBook

    def update_trade_history(self, tradeHistory):
        self.tradeHistory = tradeHistory

class Trade:
    def __init__(self, tradeId, orderId, tradingPairId, price, quantity):
        self.tradeId = tradeId
        self.orderId = orderId
        self.tradingPairId = tradingPairId
        self.price = price
        self.quantity = quantity
        self.timestamp = datetime.datetime.now()

class Binance:
    def __init__(self):
        self.users = {}
        self.orders = {}
        self.tradingPairs = {}
        self.wallets = {}
        self.marketData = {}
        self.trades = {}

    def create_user(self, userDetails):
        userId = userDetails["userId"]
        user = User(userId, userDetails["username"], userDetails["email"], userDetails["password"])
        self.users[userId] = user

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

    def create_order(self, userId, orderDetails):
        orderId = orderDetails["orderId"]
        order = Order(orderId, userId, orderDetails["tradingPair"], orderDetails["side"],
                      orderDetails["price"], orderDetails["quantity"])
        self.orders[orderId] = order

    def get_order_by_id(self, orderId):
        return self.orders.get(orderId)

    def create_trading_pair(self, pairDetails):
        tradingPairId = pairDetails["tradingPairId"]
        tradingPair = TradingPair(tradingPairId, pairDetails["pairName"], pairDetails["currentPrice"])
        self.tradingPairs[tradingPairId] = tradingPair

    def get_trading_pair_by_id(self, tradingPairId):
        return self.tradingPairs.get(tradingPairId)

    def create_wallet(self, userId, walletDetails):
        currency = walletDetails["currency"]
        wallet = Wallet(userId, currency)
        self.wallets[(userId, currency)] = wallet

    def get_wallet_by_user_id(self, userId, currency):
        return self.wallets.get((userId, currency))

    def create_market_data(self, tradingPairId):
        marketData = MarketData(tradingPairId)
        self.marketData[tradingPairId] = marketData

    def get_market_data_by_id(self, tradingPairId):
        return self.marketData.get(tradingPairId)

    def create_trade(self, tradeDetails):
        tradeId = tradeDetails["tradeId"]
        trade = Trade(tradeId, tradeDetails["orderId"], tradeDetails["tradingPairId"],
                      tradeDetails["price"], tradeDetails["quantity"])
        self.trades[tradeId] = trade

    def get_trade_by_id(self, tradeId):
        return self.trades.get(tradeId)

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data for demonstration purposes
users = []
orders = []
trading_pairs = []
wallets = []
market_data = []
trades = []

# Endpoint for creating a new user
@app.route('/users', methods=['POST'])
def create_user():
    user_data = request.json
    users.append(user_data)
    return jsonify({"message": "User created successfully"}), 201

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

# Endpoint for creating a new order
@app.route('/orders', methods=['POST'])
def create_order():
    order_data = request.json
    orders.append(order_data)
    return jsonify({"message": "Order created successfully"}), 201

# Endpoint for retrieving an order by ID
@app.route('/orders/<int:order_id>', methods=['GET'])
def get_order(order_id):
    for order in orders:
        if order["orderId"] == order_id:
            return jsonify(order), 200
    return jsonify({"message": "Order not found"}), 404

# Endpoint for creating a new trading pair
@app.route('/trading-pairs', methods=['POST'])
def create_trading_pair():
    trading_pair_data = request.json
    trading_pairs.append(trading_pair_data)
    return jsonify({"message": "Trading pair created successfully"}), 201

# Endpoint for retrieving a trading pair by ID
@app.route('/trading-pairs/<int:trading_pair_id>', methods=['GET'])
def get_trading_pair(trading_pair_id):
    for trading_pair in trading_pairs:
        if trading_pair["tradingPairId"] == trading_pair_id:
            return jsonify(trading_pair), 200
    return jsonify({"message": "Trading pair not found"}), 404

# Endpoint for creating a new wallet
@app.route('/wallets', methods=['POST'])
def create_wallet():
    wallet_data = request.json
    wallets.append(wallet_data)
    return jsonify({"message": "Wallet created successfully"}), 201

# Endpoint for retrieving a wallet by user ID and currency
@app.route('/wallets/<int:user_id>/<string:currency>', methods=['GET'])
def get_wallet(user_id, currency):
    for wallet in wallets:
        if wallet["userId"] == user_id and wallet["currency"] == currency:
            return jsonify(wallet), 200
    return jsonify({"message": "Wallet not found"}), 404

# Endpoint for creating market data
@app.route('/market-data', methods=['POST'])
def create_market_data():
    market_data = request.json
    market_data.append(market_data)
    return jsonify({"message": "Market data created successfully"}), 201

# Endpoint for retrieving market data by trading pair ID
@app.route('/market-data/<int:trading_pair_id>', methods=['GET'])
def get_market_data(trading_pair_id):
    for data in market_data:
        if data["tradingPairId"] == trading_pair_id:
            return jsonify(data), 200
    return jsonify({"message": "Market data not found"}), 404

# Endpoint for creating a new trade
@app.route('/trades', methods=['POST'])
def create_trade():
    trade_data = request.json
    trades.append(trade_data)
    return jsonify({"message": "Trade created successfully"}), 201

# Endpoint for retrieving a trade by ID
@app.route('/trades/<int:trade_id>', methods=['GET'])
def get_trade(trade_id):
    for trade in trades:
        if trade["tradeId"] == trade_id:
            return jsonify(trade), 200
    return jsonify({"message": "Trade not found"}), 404

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

def register_user(username: str, password: str) -> bool:
    # Validate input data
    if not username or not password:
        return False

    # Generate user ID (Assuming a simple UUID generation)
    user_id = str(uuid.uuid4())

    # Create user record in the database
    user_data = {
        'user_id': user_id,
        'username': username,
        'password': password
    }
    db.create_user(user_data)  # Assuming a database function to create a user

    # Return success status
    return True

def login(username: str, password: str) -> str:
    # Validate credentials
    user = db.get_user_by_username(username)  # Assuming a database function to retrieve a user by username
    if user and user['password'] == password:
        # Generate and return authentication token (Assuming a simple token generation)
        auth_token = str(uuid.uuid4())
        db.save_auth_token(user['user_id'], auth_token)  # Assuming a database function to save the auth token
        return auth_token

    # Return an empty string if login fails
    return ""

def get_trading_pairs() -> List[str]:
    # Query trading pairs from the database
    trading_pairs = db.get_trading_pairs()  # Assuming a database function to retrieve trading pairs

    # Return a list of trading pairs
    return trading_pairs

def place_limit_order(user_id: str, symbol: str, side: str, price: float, quantity: float) -> str:
    # Validate user and order data
    if not db.user_exists(user_id) or not db.trading_pair_exists(symbol):
        return ""

    # Create an order in the database
    order_id = str(uuid.uuid4())
    order_data = {
        'order_id': order_id,
        'user_id': user_id,
        'symbol': symbol,
        'side': side,
        'price': price,
        'quantity': quantity
    }
    db.create_order(order_data)  # Assuming a database function to create an order

    # Return order ID
    return order_id

def cancel_order(user_id: str, order_id: str) -> None:
    # Validate user and order data
    if db.order_belongs_to_user(order_id, user_id):
        # Cancel the order in the database
        db.cancel_order(order_id)  # Assuming a database function to cancel an order

def get_account_balance(user_id: str) -> Dict[str, float]:
    # Validate user ID
    if not db.user_exists(user_id):
        return {}

    # Retrieve account balance from the database
    account_balance = db.get_account_balance(user_id)  # Assuming a database function to retrieve account balance

    # Return account balance as a dictionary
    return account_balance

def get_trade_history(user_id: str) -> List[Dict[str, Any]]:
    # Validate user ID
    if not db.user_exists(user_id):
        return []

    # Retrieve trade history from the database
    trade_history = db.get_trade_history(user_id)  # Assuming a database function to retrieve trade history

    # Return trade history as a list of dictionaries
    return trade_history

import uuid
from datetime import datetime

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

class Hotel:
    def __init__(self, hotel_id, name, location, price, amenities):
        self.hotel_id = hotel_id
        self.name = name
        self.location = location
        self.price = price
        self.amenities = amenities

class Booking:
    def __init__(self, booking_id, user_id, hotel_id, check_in_date, check_out_date, guests, status):
        self.booking_id = booking_id
        self.user_id = user_id
        self.hotel_id = hotel_id
        self.check_in_date = check_in_date
        self.check_out_date = check_out_date
        self.guests = guests
        self.status = status

class Review:
    def __init__(self, review_id, user_id, hotel_id, rating, comment, timestamp):
        self.review_id = review_id
        self.user_id = user_id
        self.hotel_id = hotel_id
        self.rating = rating
        self.comment = comment
        self.timestamp = timestamp

class HotelSystem:
    def __init__(self):
        self.users = {}
        self.hotels = {}
        self.bookings = {}
        self.reviews = {}
    
    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 add_hotel(self, hotel):
        self.hotels[hotel.hotel_id] = hotel
    
    def get_hotel_by_id(self, hotel_id):
        return self.hotels.get(hotel_id)
    
    def create_booking(self, booking):
        self.bookings[booking.booking_id] = booking
    
    def get_booking_by_id(self, booking_id):
        return self.bookings.get(booking_id)
    
    def add_review(self, review):
        self.reviews[review.review_id] = review
    
    def get_review_by_id(self, review_id):
        return self.reviews.get(review_id)

hotel_system = HotelSystem()

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route('/users', methods=['POST'])
def create_user():
    data = request.get_json()
    user_id = str(uuid.uuid4())
    username = data['username']
    email = data['email']
    password = data['password']
    user = User(user_id, username, email, password)
    hotel_system.add_user(user)
    return jsonify({'message': 'User created successfully'}), 201

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

@app.route('/hotels', methods=['POST'])
def create_hotel():
    data = request.get_json()
    hotel_id = str(uuid.uuid4())
    name = data['name']
    location = data['location']
    price = data['price']
    amenities = data['amenities']
    hotel = Hotel(hotel_id, name, location, price, amenities)
    hotel_system.add_hotel(hotel)
    return jsonify({'message': 'Hotel created successfully'}), 201

@app.route('/hotels/<hotel_id>', methods=['GET'])
def get_hotel(hotel_id):
    hotel = hotel_system.get_hotel_by_id(hotel_id)
    if hotel:
        return jsonify(hotel.__dict__), 200
    return jsonify({'error': 'Hotel not found'}), 404

@app.route('/bookings', methods=['POST'])
def create_booking():
    data = request.get_json()
    booking_id = str(uuid.uuid4())
    user_id = data['user_id']
    hotel_id = data['hotel_id']
    check_in_date = data['check_in_date']
    check_out_date = data['check_out_date']
    guests = data['guests']
    status = data['status']
    booking = Booking(booking_id, user_id, hotel_id, check_in_date, check_out_date, guests, status)
    hotel_system.create_booking(booking)
    return jsonify({'message': 'Booking created successfully'}), 201

@app.route('/bookings/<booking_id>', methods=['GET'])
def get_booking(booking_id):
    booking = hotel_system.get_booking_by_id(booking_id)
    if booking:
        return jsonify(booking.__dict__), 200
    return jsonify({'error': 'Booking not found'}), 404

@app.route('/reviews', methods=['POST'])
def create_review():
    data = request.get_json()
    review_id = str(uuid.uuid4())
    user_id = data['user_id']
    hotel_id = data['hotel_id']
    rating = data['rating']
    comment = data['comment']
    timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    review = Review(review_id, user_id, hotel_id, rating, comment, timestamp)
    hotel_system.add_review(review)
    return jsonify({'message': 'Review created successfully'}), 201

@app.route('/reviews/<review_id>', methods=['GET'])
def get_review(review_id):
    review = hotel_system.get_review_by_id(review_id)
    if review:
        return jsonify(review.__dict__), 200
    return jsonify({'error': 'Review not found'}), 404

from flask import Flask, request, jsonify

app = Flask(__name__)

# User Registration and Authentication
@app.route('/api/user/register', methods=['POST'])
def register_user():
    # Logic for user registration
    # ...
    return jsonify({
        'message': 'User registration successful',
        'user_id': '123456789'
    }), 201

@app.route('/api/user/login', methods=['POST'])
def login_user():
    # Logic for user login
    # ...
    return jsonify({
        'message': 'Login successful',
        'session_token': 'abcd1234'
    }), 200

# Hotel Search and Listings
@app.route('/api/hotels', methods=['GET'])
def search_hotels():
    # Logic for searching hotels based on criteria
    # ...
    return jsonify({
        'hotels': [
            {
                'id': 'hotel123',
                'name': 'Hotel ABC',
                'location': 'New York',
                'price': 150,
                'amenities': ['WiFi', 'Swimming Pool'],
                'rating': 4.5
            },
            {
                'id': 'hotel456',
                'name': 'Hotel XYZ',
                'location': 'Los Angeles',
                'price': 200,
                'amenities': ['Parking', 'Gym'],
                'rating': 4.2
            }
        ]
    }), 200

# Booking Management
@app.route('/api/booking', methods=['POST'])
def create_booking():
    # Logic for creating a new booking
    # ...
    return jsonify({
        'message': 'Booking successful',
        'booking_id': 'booking987'
    }), 201

@app.route('/api/booking/<booking_id>', methods=['GET'])
def get_booking(booking_id):
    # Logic for retrieving booking details
    # ...
    return jsonify({
        'booking_id': booking_id,
        'user_id': '123456789',
        'hotel_id': 'hotel123',
        'check_in_date': '2023-07-10',
        'check_out_date': '2023-07-15',
        'guests': 2,
        'status': 'confirmed'
    }), 200

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

from flask import Flask, request, jsonify

app = Flask(__name__)

# User Registration and Authentication
users = []

@app.route('/api/user/register', methods=['POST'])
def register_user():
    data = request.get_json()
    name = data['name']
    email = data['email']
    password = data['password']
    
    # Check if user already exists
    for user in users:
        if user['email'] == email:
            return jsonify({'error': 'User already exists'}), 400
    
    # Create a new user
    user_id = len(users) + 1
    user = {'id': user_id, 'name': name, 'email': email, 'password': password}
    users.append(user)
    
    return jsonify({'message': 'User registration successful', 'user_id': user_id}), 201

@app.route('/api/user/login', methods=['POST'])
def login_user():
    data = request.get_json()
    email = data['email']
    password = data['password']
    
    # Check if user exists and password matches
    for user in users:
        if user['email'] == email and user['password'] == password:
            session_token = generate_session_token()
            return jsonify({'message': 'Login successful', 'session_token': session_token}), 200
    
    return jsonify({'error': 'Invalid credentials'}), 401

def generate_session_token():
    # Logic for generating a session token
    # ...
    return 'abcd1234'

# Hotel Search and Filters
hotels = [
    {
        'id': 'hotel123',
        'name': 'Hotel ABC',
        'location': 'New York',
        'price': 150,
        'amenities': ['WiFi', 'Swimming Pool'],
        'rating': 4.5
    },
    {
        'id': 'hotel456',
        'name': 'Hotel XYZ',
        'location': 'Los Angeles',
        'price': 200,
        'amenities': ['Parking', 'Gym'],
        'rating': 4.2
    }
]

@app.route('/api/hotels', methods=['GET'])
def search_hotels():
    location = request.args.get('location')
    price_range = request.args.get('price_range')
    amenities = request.args.get('amenities')
    
    filtered_hotels = []
    for hotel in hotels:
        if (not location or hotel['location'] == location) and \
           (not price_range or hotel['price'] <= int(price_range)) and \
           (not amenities or all(x in hotel['amenities'] for x in amenities.split(','))):
            filtered_hotels.append(hotel)
    
    return jsonify({'hotels': filtered_hotels}), 200

# Hotel Listings and Details
@app.route('/api/hotels/<hotel_id>', methods=['GET'])
def get_hotel_details(hotel_id):
    hotel = next((h for h in hotels if h['id'] == hotel_id), None)
    if hotel:
        return jsonify(hotel), 200
    return jsonify({'error': 'Hotel not found'}), 404

# Booking and Reservation Management
bookings = []

@app.route('/api/booking', methods=['POST'])
def create_booking():
    data = request.get_json()
    user_id = data['user_id']
    hotel_id = data['hotel_id']
    check_in_date = data['check_in_date']
    check_out_date = data['check_out_date']
    guests = data['guests']
    
    # Check if hotel exists
    hotel = next((h for h in hotels if h['id'] == hotel_id), None)
    if not hotel:
        return jsonify({'error': 'Hotel not found'}), 404
    
    # Create a new booking
    booking_id = len(bookings) + 1
    booking = {
        'booking_id': booking_id,
        'user_id': user_id,
        'hotel_id': hotel_id,
        'check_in_date': check_in_date,
        'check_out_date': check_out_date,
        'guests': guests,
        'status': 'confirmed'
    }
    bookings.append(booking)
    
    return jsonify({'message': 'Booking successful', 'booking_id': booking_id}), 201

@app.route('/api/booking/<booking_id>', methods=['GET'])
def get_booking(booking_id):
    booking = next((b for b in bookings if b['booking_id'] == booking_id), None)
    if booking:
        return jsonify(booking), 200
    return jsonify({'error': 'Booking not found'}), 404

# Payment Gateway Integration

@app.route('/api/payment', methods=['POST'])
def process_payment():
    data = request.get_json()
    # Logic for processing payment
    # ...
    return jsonify({'message': 'Payment successful', 'payment_id': 'payment123'}), 200

# User Reviews and Ratings
reviews = []

@app.route('/api/reviews', methods=['POST'])
def submit_review():
    data = request.get_json()
    hotel_id = data['hotel_id']
    review_text = data['review_text']
    rating = data['rating']
    
    # Check if hotel exists
    hotel = next((h for h in hotels if h['id'] == hotel_id), None)
    if not hotel:
        return jsonify({'error': 'Hotel not found'}), 404
    
    # Submit a new review
    review_id = len(reviews) + 1
    review = {'review_id': review_id, 'hotel_id': hotel_id, 'review_text': review_text, 'rating': rating}
    reviews.append(review)
    
    return jsonify({'message': 'Review submitted successfully'}), 201

# Customer Support
support_requests = []

@app.route('/api/support', methods=['POST'])
def contact_support():
    data = request.get_json()
    message = data['message']
    # Logic for contacting customer support
    # ...
    support_requests.append(message)
    
    return jsonify({'message': 'Support request submitted successfully'}), 201

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

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

    # Getter and setter methods for attributes
    # ...


class Flight:
    def __init__(self, flightId, origin, destination, airline, departureTime, arrivalTime):
        self.flightId = flightId
        self.origin = origin
        self.destination = destination
        self.airline = airline
        self.departureTime = departureTime
        self.arrivalTime = arrivalTime

    # Getter and setter methods for attributes
    # ...


class FlightRadar24:
    def __init__(self):
        self.users = {}
        self.flights = []

    def addUser(self, user):
        self.users[user.userId] = user

    def getUserById(self, userId):
        return self.users.get(userId)

    def createFlight(self, flightId, origin, destination, airline, departureTime, arrivalTime):
        flight = Flight(flightId, origin, destination, airline, departureTime, arrivalTime)
        self.flights.append(flight)

    def getFlightsByUser(self, userId):
        user = self.getUserById(userId)
        if user:
            userFlights = []
            for flight in self.flights:
                if flight.airline == user.username:
                    userFlights.append(flight)
            return userFlights
        return []

from flask import Flask, jsonify, request

app = Flask(__name__)
flightRadar24 = FlightRadar24()

@app.route('/users', methods=['POST'])
def createUser():
    data = request.get_json()
    userId = data.get('userId')
    username = data.get('username')
    password = data.get('password')
    email = data.get('email')
    user = User(userId, username, password, email)
    flightRadar24.addUser(user)
    return jsonify({'message': 'User created successfully'}), 201

@app.route('/users/<userId>', methods=['GET'])
def getUser(userId):
    user = flightRadar24.getUserById(userId)
    if user:
        return jsonify(user.__dict__), 200
    return jsonify({'message': 'User not found'}), 404

@app.route('/flights', methods=['POST'])
def createFlight():
    data = request.get_json()
    flightId = data.get('flightId')
    origin = data.get('origin')
    destination = data.get('destination')
    airline = data.get('airline')
    departureTime = data.get('departureTime')
    arrivalTime = data.get('arrivalTime')
    flightRadar24.createFlight(flightId, origin, destination, airline, departureTime, arrivalTime)
    return jsonify({'message': 'Flight created successfully'}), 201

@app.route('/flights/<flightId>', methods=['GET'])
def getFlight(flightId):
    for flight in flightRadar24.flights:
        if flight.flightId == flightId:
            return jsonify(flight.__dict__), 200
    return jsonify({'message': 'Flight not found'}), 404

@app.route('/users/<userId>/flights', methods=['GET'])
def getFlightsByUser(userId):
    flights = flightRadar24.getFlightsByUser(userId)
    return jsonify({'flights': [flight.__dict__ for flight in flights]}), 200

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

from flask import Flask, request, jsonify

app = Flask(__name__)

@app.route("/flights/<flight_id>", methods=["GET"])
def get_flight_details(flight_id):
    # Retrieve flight details from the database based on flight_id
    flight = retrieve_flight_details(flight_id)
    if flight:
        return jsonify(flight), 200
    else:
        return jsonify({"error": "Flight not found"}), 404

@app.route("/flights", methods=["GET", "POST"])
def handle_flights():
    if request.method == "GET":
        # Retrieve list of flights based on filters from the request parameters
        filters = request.args.to_dict()
        flights = retrieve_flights(filters)
        return jsonify(flights), 200
    elif request.method == "POST":
        # Create a new flight using the provided flight details in the request body
        flight_data = request.get_json()
        flight_id = create_flight(flight_data)
        return jsonify({"flight_id": flight_id}), 201

# Similar route definitions for /airports and /users/{user_id}/notifications

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

def retrieve_flight_details(flight_id):
    # Retrieve flight details from the database based on flight_id
    # Perform necessary database query and return the result
    # Example using SQLAlchemy:
    flight = Flight.query.filter_by(flight_id=flight_id).first()
    if flight:
        return {
            "flight_id": flight.flight_id,
            "departure_airport": flight.departure_airport,
            "arrival_airport": flight.arrival_airport,
            "status": flight.status,
            "departure_time": flight.departure_time,
            "arrival_time": flight.arrival_time,
            "aircraft": {
                "registration": flight.aircraft.registration,
                "type": flight.aircraft.type
            }
        }
    else:
        return None

def retrieve_flights(filters):
    # Retrieve list of flights based on the provided filters
    # Perform necessary database query and return the result
    # Example using SQLAlchemy:
    flights = Flight.query.filter_by(**filters).all()
    return [
        {
            "flight_id": flight.flight_id,
            "departure_airport": flight.departure_airport,
            "arrival_airport": flight.arrival_airport,
            "status": flight.status,
            "departure_time": flight.departure_time,
            "arrival_time": flight.arrival_time,
            "aircraft": {
                "registration": flight.aircraft.registration,
                "type": flight.aircraft.type
            }
        }
        for flight in flights
    ]

def create_flight(flight_data):
    # Create a new flight using the provided flight details
    # Perform necessary database operations to create the flight
    # Example using SQLAlchemy:
    flight = Flight(**flight_data)
    db.session.add(flight)
    db.session.commit()
    return flight.flight_id

from flask import Flask, request, jsonify

app = Flask(__name__)

# Flight details endpoint
@app.route('/flights/<flight_id>', methods=['GET'])
def get_flight_details(flight_id):
    flight = retrieve_flight_details(flight_id)
    if flight:
        return jsonify(flight), 200
    else:
        return jsonify({"error": "Flight not found"}), 404

# Flights endpoint
@app.route('/flights', methods=['GET', 'POST'])
def get_filtered_flights():
    if request.method == 'GET':
        filters = request.args.to_dict()
        flights = retrieve_filtered_flights(filters)
        return jsonify(flights), 200
    elif request.method == 'POST':
        flight_data = request.get_json()
        flight_id = create_flight(flight_data)
        return jsonify({"flight_id": flight_id}), 201

# Airports endpoint
@app.route('/airports/<airport_code>', methods=['GET'])
def get_airport_details(airport_code):
    airport = retrieve_airport_details(airport_code)
    if airport:
        return jsonify(airport), 200
    else:
        return jsonify({"error": "Airport not found"}), 404

# Airports endpoint (filtered)
@app.route('/airports', methods=['GET'])
def get_filtered_airports():
    filters = request.args.to_dict()
    airports = retrieve_filtered_airports(filters)
    return jsonify(airports), 200

# User notifications endpoint
@app.route('/users/<user_id>/notifications', methods=['GET', 'POST'])
def handle_user_notifications(user_id):
    if request.method == 'GET':
        notifications = retrieve_user_notifications(user_id)
        return jsonify(notifications), 200
    elif request.method == 'POST':
        notification_data = request.get_json()
        notification_id = create_user_notification(user_id, notification_data)
        return jsonify({"notification_id": notification_id}), 201

# Example database retrieval functions
def retrieve_flight_details(flight_id):
    # Perform necessary database query to retrieve flight details
    # Return flight details as a dictionary
    # Example using SQLAlchemy:
    flight = Flight.query.filter_by(flight_id=flight_id).first()
    if flight:
        return {
            "flight_id": flight.flight_id,
            "departure_airport": flight.departure_airport,
            "arrival_airport": flight.arrival_airport,
            "status": flight.status,
            "departure_time": flight.departure_time,
            "arrival_time": flight.arrival_time,
            "aircraft": {
                "registration": flight.aircraft.registration,
                "type": flight.aircraft.type
            }
        }
    else:
        return None

def retrieve_filtered_flights(filters):
    # Perform necessary database query to retrieve filtered flights
    # Return list of flights as a list of dictionaries
    # Example using SQLAlchemy:
    flights = Flight.query.filter_by(**filters).all()
    return [
        {
            "flight_id": flight.flight_id,
            "departure_airport": flight.departure_airport,
            "arrival_airport": flight.arrival_airport,
            "status": flight.status,
            "departure_time": flight.departure_time,
            "arrival_time": flight.arrival_time,
            "aircraft": {
                "registration": flight.aircraft.registration,
                "type": flight.aircraft.type
            }
        }
        for flight in flights
    ]

def create_flight(flight_data):
    # Perform necessary database operations to create a new flight
    # Return the newly created flight ID
    # Example using SQLAlchemy:
    flight = Flight(**flight_data)
    db.session.add(flight)
    db.session.commit()
    return flight.flight_id

def retrieve_airport_details(airport_code):
    # Perform necessary database query to retrieve airport details
    # Return airport details as a dictionary
    # Example using SQLAlchemy:
    airport = Airport.query.filter_by(airport_code=airport_code).first()
    if airport:
        return {
            "airport_code": airport.airport_code,
            "name": airport.name,
            "location": airport.location,
            "country": airport.country,
            "timezone": airport.timezone
        }
    else:
        return None

def retrieve_filtered_airports(filters):
    # Perform necessary database query to retrieve filtered airports
    # Return list of airports as a list of dictionaries
    # Example using SQLAlchemy:
    airports = Airport.query.filter_by(**filters).all()
    return [
        {
            "airport_code": airport.airport_code,
            "name": airport.name,
            "location": airport.location,
            "country": airport.country,
            "timezone": airport.timezone
        }
        for airport in airports
    ]

def retrieve_user_notifications(user_id):
    # Perform necessary database query to retrieve user notifications
    # Return list of notifications as a list of dictionaries
    # Example using SQLAlchemy:
    notifications = Notification.query.filter_by(user_id=user_id).all()
    return [
        {
            "notification_id": notification.notification_id,
            "message": notification.message,
            "timestamp": notification.timestamp
        }
        for notification in notifications
    ]

def create_user_notification(user_id, notification_data):
    # Perform necessary database operations to create a new notification for the user
    # Return the newly created notification ID
    # Example using SQLAlchemy:
    notification = Notification(user_id=user_id, message=notification_data["message"])
    db.session.add(notification)
    db.session.commit()
    return notification.notification_id

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

User:

UserID (Primary Key)
Username
Email
Password

Repository:

RepoID (Primary Key)
UserID (Foreign Key - User.UserID)
RepoName
Description
CreationTimestamp

Commit:

CommitID (Primary Key)
RepoID (Foreign Key - Repository.RepoID)
UserID (Foreign Key - User.UserID)
CommitMessage
Timestamp
Changes (Reference to the actual code changes)

Branch:

BranchID (Primary Key)
RepoID (Foreign Key - Repository.RepoID)
BranchName
LastCommitID (Foreign Key - Commit.CommitID)

class User:
    def __init__(self, userId, username, password):
        self.userId = userId
        self.username = username
        self.password = password
        # other user attributes
        
class Repository:
    def __init__(self, repoId, userId, repoName, description):
        self.repoId = repoId
        self.userId = userId
        self.repoName = repoName
        self.description = description
        # other repository attributes
        
class Commit:
    def __init__(self, commitId, repoId, userId, commitMessage, timestamp, changes):
        self.commitId = commitId
        self.repoId = repoId
        self.userId = userId
        self.commitMessage = commitMessage
        self.timestamp = timestamp
        self.changes = changes
        # other commit attributes
        
class Branch:
    def __init__(self, branchId, repoId, branchName, lastCommitId):
        self.branchId = branchId
        self.repoId = repoId
        self.branchName = branchName
        self.lastCommitId = lastCommitId
        # other branch attributes

# Usage example:
user1 = User("1", "user1", "password1")
repo1 = Repository("1001", "1", "project1", "A sample repository")
commit1 = Commit("2001", "1001", "1", "Initial commit", "2023-07-20 10:00:00", "Code changes here...")
branch1 = Branch("3001", "1001", "main", "2001")

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

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

# Dummy data to represent the database
users = {}
repositories = {}
issues = {}

# User resource
class UserResource(Resource):
    def get(self, user_id):
        # Get user details by user_id
        if user_id in users:
            return users[user_id]
        else:
            return {"message": "User not found"}, 404

    def post(self, user_id):
        # Create a new user
        if user_id not in users:
            data = request.get_json()
            users[user_id] = data
            return {"message": "User created successfully"}, 201
        else:
            return {"message": "User already exists"}, 400

# Repository resource
class RepositoryResource(Resource):
    def get(self, repo_id):
        # Get repository details by repo_id
        if repo_id in repositories:
            return repositories[repo_id]
        else:
            return {"message": "Repository not found"}, 404

    def post(self, repo_id):
        # Create a new repository
        if repo_id not in repositories:
            data = request.get_json()
            repositories[repo_id] = data
            return {"message": "Repository created successfully"}, 201
        else:
            return {"message": "Repository already exists"}, 400

# Issue resource
class IssueResource(Resource):
    def get(self, issue_id):
        # Get issue details by issue_id
        if issue_id in issues:
            return issues[issue_id]
        else:
            return {"message": "Issue not found"}, 404

    def post(self, issue_id):
        # Create a new issue
        if issue_id not in issues:
            data = request.get_json()
            issues[issue_id] = data
            return {"message": "Issue created successfully"}, 201
        else:
            return {"message": "Issue already exists"}, 400

# Add resources to the API
api.add_resource(UserResource, '/users/<string:user_id>')
api.add_resource(RepositoryResource, '/repositories/<string:repo_id>')
api.add_resource(IssueResource, '/issues/<string:issue_id>')

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

User Management API:
Endpoint: POST /users
Description: Create a new user account.
Request Body: JSON object containing user details (username, email, password).
Response: HTTP 201 Created if successful.

Endpoint: POST /login
Description: Log in a user.
Request Body: JSON object containing user credentials (username, password).
Response: HTTP 200 OK if login successful, 401 Unauthorized if login failed.

Endpoint: GET /users/{userID}
Description: Get user information by user ID.
Response: HTTP 200 OK with the user's details in the response body if found, 404 Not Found if user not found.

Endpoint: PATCH /users/{userID}
Description: Update user profile information.
Request Body: JSON object containing updated user details.
Response: HTTP 200 OK if successful, 404 Not Found if user not found.

Repository Management API:
Endpoint: POST /users/{userID}/repositories
Description: Create a new repository for the specified user.
Request Body: JSON object containing repository details (repoName, description).
Response: HTTP 201 Created if successful.

Endpoint: GET /repositories/{repoID}
Description: Get repository details by repository ID.
Response: HTTP 200 OK with the repository details in the response body if found, 404 Not Found if not found.

Endpoint: PATCH /repositories/{repoID}
Description: Update repository details.
Request Body: JSON object containing updated repository details.
Response: HTTP 200 OK if successful, 404 Not Found if repository not found.

Endpoint: DELETE /repositories/{repoID}
Description: Delete a repository.
Response: HTTP 200 OK if successful, 404 Not Found if repository not found.

Commit API:
Endpoint: POST /repositories/{repoID}/commits
Description: Create a new commit for the specified repository.
Request Body: JSON object containing commit details (commitMessage, changes).
Response: HTTP 201 Created if successful.

Endpoint: GET /repositories/{repoID}/commits/{commitID}
Description: Get commit details by commit ID.
Response: HTTP 200 OK with the commit details in the response body if found, 404 Not Found if not found.

Endpoint: GET /repositories/{repoID}/branches/{branchName}/commits
Description: Get all commits in a specific branch of a repository.
Response: HTTP 200 OK with a list of commits in the response body.

Branch API:
Endpoint: POST /repositories/{repoID}/branches
Description: Create a new branch for the specified repository.
Request Body: JSON object containing branch details (branchName, lastCommitID).
Response: HTTP 201 Created if successful.

Endpoint: GET /repositories/{repoID}/branches/{branchName}
Description: Get branch details by branch name.
Response: HTTP 200 OK with the branch details in the response body if found, 404 Not Found if not found.

Endpoint: GET /repositories/{repoID}/branches
Description: Get all branches of a repository.
Response: HTTP 200 OK with a list of branches in the response body.

from flask import Flask, request, jsonify

app = Flask(__name__)

# Sample data to be stored on the server
users = {
    "user1": {
        "username": "JohnDoe",
        "email": "[email protected]",
        "password": "password1",
        # other user attributes
    },
    # Add more users here...
}

repositories = {
    "1001": {
        "userId": "user1",
        "repoName": "project1",
        "description": "A sample repository",
        # other repository attributes
    },
    # Add more repositories here...
}

commits = {
    "2001": {
        "repoId": "1001",
        "userId": "user1",
        "commitMessage": "Initial commit",
        "timestamp": "2023-07-20 10:00:00",
        "changes": "Code changes here...",
        # other commit attributes
    },
    # Add more commits here...
}

branches = {
    "3001": {
        "repoId": "1001",
        "branchName": "main",
        "lastCommitId": "2001",
        # other branch attributes
    },
    # Add more branches here...
}

# Endpoint for creating a new user
@app.route("/users", methods=["POST"])
def create_user():
    data = request.get_json()
    username = data.get("username")
    email = data.get("email")
    password = data.get("password")
    
    # Check if the username is available
    if username in users:
        return jsonify({"message": "Username already exists"}), 400
    
    # Create a new user
    new_user = {
        "username": username,
        "email": email,
        "password": password,
        # other user attributes
    }
    users[username] = new_user
    return jsonify({"message": "User created successfully"}), 201

# Endpoint for getting user information
@app.route("/users/<username>", methods=["GET"])
def get_user(username):
    user = users.get(username)
    if user:
        return jsonify(user), 200
    return jsonify({"message": "User not found"}), 404

# Endpoint for creating a new repository
@app.route("/users/<username>/repositories", methods=["POST"])
def create_repository(username):
    user = users.get(username)
    if not user:
        return jsonify({"message": "User not found"}), 404
    
    data = request.get_json()
    repo_name = data.get("repoName")
    description = data.get("description")
    
    # Generate a unique repository ID
    repo_id = str(len(repositories) + 1)
    
    # Create a new repository
    new_repo = {
        "userId": username,
        "repoName": repo_name,
        "description": description,
        # other repository attributes
    }
    repositories[repo_id] = new_repo
    return jsonify({"message": "Repository created successfully"}), 201

# Add more endpoints for updating and deleting users, repositories, commits, and branches.
# ...

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

class GitHub:
    def __init__(self):
        self.users = {}  # {user_id: user_data}
        self.repositories = {}  # {repo_id: repo_data}
        self.pull_requests = []  # list of pull request objects
        self.issues = []  # list of issue objects
        self.project_boards = []  # list of project board objects
        self.wiki_pages = {}  # {page_id: page_data}

    # Version Control
    def track_changes(self, user_id, repo_id, changes):
        if repo_id in self.repositories:
            self.repositories[repo_id]['changes'].append(changes)
            return True
        return False

    # Collaboration
    def create_pull_request(self, user_id, repo_id, changes):
        if repo_id in self.repositories:
            pull_request = {
                'user_id': user_id,
                'repo_id': repo_id,
                'changes': changes,
                'status': 'Open'
            }
            self.pull_requests.append(pull_request)
            return pull_request
        return None

    def code_review(self, pull_request_id, reviewer_id, comments):
        for pull_request in self.pull_requests:
            if pull_request['id'] == pull_request_id:
                pull_request['reviewers'].append(reviewer_id)
                pull_request['comments'] = comments
                return True
        return False

    def close_pull_request(self, pull_request_id):
        for pull_request in self.pull_requests:
            if pull_request['id'] == pull_request_id:
                pull_request['status'] = 'Closed'
                return True
        return False

    # Repository Hosting
    def create_repository(self, user_id, repo_id, description):
        if repo_id not in self.repositories:
            repository = {
                'user_id': user_id,
                'repo_id': repo_id,
                'description': description,
                'changes': []
            }
            self.repositories[repo_id] = repository
            return repository
        return None

    # Community and Social Features
    def follow_project(self, user_id, repo_id):
        if user_id in self.users and repo_id in self.repositories:
            if 'followed_projects' not in self.users[user_id]:
                self.users[user_id]['followed_projects'] = []
            if repo_id not in self.users[user_id]['followed_projects']:
                self.users[user_id]['followed_projects'].append(repo_id)
                return True
        return False

    def star_repository(self, user_id, repo_id):
        if user_id in self.users and repo_id in self.repositories:
            if 'starred_repositories' not in self.users[user_id]:
                self.users[user_id]['starred_repositories'] = []
            if repo_id not in self.users[user_id]['starred_repositories']:
                self.users[user_id]['starred_repositories'].append(repo_id)
                return True
        return False

    # Integrated CI/CD
    def create_build(self, user_id, repo_id, build_details):
        if repo_id in self.repositories:
            build = {
                'user_id': user_id,
                'repo_id': repo_id,
                'details': build_details
            }
            self.repositories[repo_id]['builds'].append(build)
            return build
        return None

    # Project Management
    def create_project_board(self, user_id, board_id, name):
        if user_id in self.users:
            board = {
                'user_id': user_id,
                'board_id': board_id,
                'name': name,
                'milestones': [],
                'tasks': []
            }
            self.project_boards.append(board)
            return board
        return None

    def add_milestone_to_board(self, board_id, milestone_id, title):
        for board in self.project_boards:
            if board['board_id'] == board_id:
                milestone = {
                    'milestone_id': milestone_id,
                    'title': title
                }
                board['milestones'].append(milestone)
                return milestone
        return None

    def add_task_to_board(self, board_id, task_id, title, description):
        for board in self.project_boards:
            if board['board_id'] == board_id:
                task = {
                    'task_id': task_id,
                    'title': title,
                    'description': description,
                    'status': 'To Do'
                }
                board['tasks'].append(task)
                return task
        return None

    # Wikis and Documentation
    def create_wiki_page(self, user_id, page_id, title, content):
        if user_id in self.users:
            page = {
                'user_id': user_id,
                'page_id': page_id,
                'title': title,
                'content': content
            }
            self.wiki_pages[page_id] = page
            return page
        return None

    def update_wiki_page(self, page_id, title, content):
        if page_id in self.wiki_pages:
            page = self.wiki_pages[page_id]
            page['title'] = title
            page['content'] = content
            return True
        return False

    def delete_wiki_page(self, page_id):
        if page_id in self.wiki_pages:
            del self.wiki_pages[page_id]
            return True
        return False

    # Extensive APIs
    def get_api_info(self):
        return {
            'endpoints': [
                '/users/<user_id>',
                '/repositories/<repo_id>',
                '/pull_requests',
                '/issues',
                '/create_build',
                '/create_project_board',
                '/create_wiki_page',
                # Add more endpoints here for other API functionalities
            ]
        }

User:

Attributes:
user_id: String (Unique identifier for each user)
username: String (Username of the user)
password: String (User's password)
email: String (User's email address)
Other user attributes like name, contact, etc.
Flight:

Attributes:
flight_id: String (Unique identifier for each flight)
airline: String (Name of the airline)
origin: String (Flight's origin location)
destination: String (Flight's destination location)
departure_date: DateTime (Date and time of departure)
price: Float (Flight's ticket price)
Hotel:

Attributes:
hotel_id: String (Unique identifier for each hotel)
name: String (Name of the hotel)
location: String (Hotel's location)
check_in_date: DateTime (Date of check-in)
check_out_date: DateTime (Date of check-out)
price_per_night: Float (Price per night for the hotel)
Booking:

Attributes:
booking_id: String (Unique identifier for each booking)
user_id: String (Foreign key from User table)
flight_id: String (Foreign key from Flight table)
hotel_id: String (Foreign key from Hotel table)
booking_date: DateTime (Date and time of booking)
total_price: Float (Total price for the booking)

from flask import Flask, request, jsonify

app = Flask(__name__)

# In-memory data structures to simulate database
users = {}
flights = {}
hotels = {}
bookings = {}
booking_id_counter = 1

# Helper functions for token generation and validation
def generate_user_token(username):
    return f'TOKEN_{username}'

def validate_user_token(user_token):
    return user_token.startswith('TOKEN_')

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

    if username not in users:
        users[username] = {'password': password, 'email': email}
        return jsonify({'message': 'User registered successfully'}), 200
    else:
        return jsonify({'error': 'Username already exists'}), 409

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

    if username in users and users[username]['password'] == password:
        user_token = generate_user_token(username)
        return jsonify({'token': user_token}), 200
    else:
        return jsonify({'error': 'Invalid credentials'}), 401

# Flight Search
@app.route('/api/flights/search', methods=['GET'])
def search_flights():
    origin = request.args.get('origin')
    destination = request.args.get('destination')
    departure_date = request.args.get('departure_date')
    passengers = int(request.args.get('passengers'))

    # Implement flight search algorithm here
    # For demonstration, return dummy response
    available_flights = [
        {'id': 1, 'origin': origin, 'destination': destination, 'departure_date': departure_date, 'price': 200},
        {'id': 2, 'origin': origin, 'destination': destination, 'departure_date': departure_date, 'price': 150},
        {'id': 3, 'origin': origin, 'destination': destination, 'departure_date': departure_date, 'price': 250},
    ]
    return jsonify({'flights': available_flights}), 200

# Hotel Search
@app.route('/api/hotels/search', methods=['GET'])
def search_hotels():
    destination = request.args.get('destination')
    check_in_date = request.args.get('check_in_date')
    check_out_date = request.args.get('check_out_date')
    guests = int(request.args.get('guests'))

    # Implement hotel search algorithm here
    # For demonstration, return dummy response
    available_hotels = [
        {'id': 1, 'name': 'Luxury Hotel', 'location': destination, 'price_per_night': 300},
        {'id': 2, 'name': 'Comfort Inn', 'location': destination, 'price_per_night': 200},
        {'id': 3, 'name': 'Business Hotel', 'location': destination, 'price_per_night': 180},
    ]
    return jsonify({'hotels': available_hotels}), 200

# Booking Management
@app.route('/api/bookings', methods=['GET'])
def get_bookings():
    user_token = request.args.get('user_token')

    if validate_user_token(user_token):
        # Retrieve bookings for the user (simulated data)
        user_bookings = get_user_bookings(user_token)
        return jsonify({'bookings': user_bookings}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Helper function for flight booking simulation
def book_flight_for_user(user_token, flight_id, passengers, payment_info):
    global booking_id_counter
    # Simulate booking creation and return booking ID
    booking_id = booking_id_counter
    bookings[booking_id] = {
        'user_token': user_token,
        'flight_id': flight_id,
        'passengers': passengers,
        'payment_info': payment_info
    }
    booking_id_counter += 1
    return booking_id

# Helper function to retrieve user's bookings
def get_user_bookings(user_token):
    # Simulate retrieval of bookings for the user
    return [booking for booking in bookings.values() if booking['user_token'] == user_token]

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

from flask import Flask, request, jsonify

app = Flask(__name__)

# In-memory data structures to simulate database
users = {}
flights = {}
hotels = {}
bookings = {}
booking_id_counter = 1

# Helper functions for token generation and validation
def generate_user_token(username):
    return f'TOKEN_{username}'

def validate_user_token(user_token):
    return user_token.startswith('TOKEN_')

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

    # Check if the user exists in the database (simulated)
    if username in users and users[username]['password'] == password:
        # Generate and return an authentication token (simulated token)
        user_token = generate_user_token(username)
        return jsonify({'token': user_token}), 200
    else:
        return jsonify({'error': 'Invalid credentials'}), 401

# Flight Search
@app.route('/api/flights/search', methods=['GET'])
def search_flights():
    origin = request.args.get('origin')
    destination = request.args.get('destination')
    departure_date = request.args.get('departure_date')
    passengers = int(request.args.get('passengers'))

    # Perform flight search based on the provided criteria (simulated data)
    # Return list of available flights in JSON format
    # In real-world, integrate with external flight APIs
    return jsonify({'flights': flights}), 200

# Flight Booking
@app.route('/api/flights/book', methods=['POST'])
def book_flight():
    data = request.get_json()
    flight_id = data['flight_id']
    passengers = data['passengers']
    payment_info = data['payment_info']
    user_token = data['user_token']

    # Validate the user_token (simulated)
    if validate_user_token(user_token):
        # Perform flight booking (simulated data)
        booking_id = book_flight_for_user(user_token, flight_id, passengers, payment_info)
        return jsonify({'booking_id': booking_id}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Hotel Search - Implement similarly as the Flight Search
@app.route('/api/hotels/search', methods=['GET'])
def search_hotels():
    destination = request.args.get('destination')
    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 the provided criteria (simulated data)
    # Return list of available hotels in JSON format
    # In real-world, integrate with external hotel APIs
    return jsonify({'hotels': hotels}), 200

# Hotel Booking - Implement similarly as the Flight Booking
@app.route('/api/hotels/book', methods=['POST'])
def book_hotel():
    data = request.get_json()
    hotel_id = data['hotel_id']
    guests = data['guests']
    payment_info = data['payment_info']
    user_token = data['user_token']

    # Validate the user_token (simulated)
    if validate_user_token(user_token):
        # Perform hotel booking (simulated data)
        booking_id = book_hotel_for_user(user_token, hotel_id, guests, payment_info)
        return jsonify({'booking_id': booking_id}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Booking Management - Implement similarly as the Flight Search but retrieve bookings for the specific user
@app.route('/api/bookings', methods=['GET'])
def get_bookings():
    user_token = request.args.get('user_token')

    # Validate the user_token (simulated)
    if validate_user_token(user_token):
        # Retrieve bookings for the user (simulated data)
        user_bookings = get_user_bookings(user_token)
        return jsonify({'bookings': user_bookings}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Booking Cancellation - Implement similarly as the Flight Booking but cancel the specific booking for the user
@app.route('/api/bookings/cancel', methods=['POST'])
def cancel_booking():
    data = request.get_json()
    booking_id = data['booking_id']
    user_token = data['user_token']

    # Validate the user_token (simulated)
    if validate_user_token(user_token):
        # Cancel the booking (simulated data)
        success = cancel_user_booking(user_token, booking_id)
        if success:
            return jsonify({'message': 'Booking successfully cancelled'}), 200
        else:
            return jsonify({'error': 'Booking not found'}), 404
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Helper function for flight booking simulation
def book_flight_for_user(user_token, flight_id, passengers, payment_info):
    global booking_id_counter
    # Simulate booking creation and return booking ID
    booking_id = booking_id_counter
    bookings[booking_id] = {
        'user_token': user_token,
        'flight_id': flight_id,
        'passengers': passengers,
        'payment_info': payment_info
    }
    booking_id_counter += 1
    return booking_id

# Helper function for hotel booking simulation
def book_hotel_for_user(user_token, hotel_id, guests, payment_info):
    global booking_id_counter
    # Simulate booking creation and return booking ID
    booking_id = booking_id_counter
    bookings[booking_id] = {
        'user_token': user_token,
        'hotel_id': hotel_id,
        'guests': guests,
        'payment_info': payment_info
    }
    booking_id_counter += 1
    return booking_id

# Helper function to retrieve user's bookings
def get_user_bookings(user_token):
    # Simulate retrieval of bookings for the user
    return [booking for booking in bookings.values() if booking['user_token'] == user_token]

# Helper function to cancel a booking for the user
def cancel_user_booking(user_token, booking_id):
    # Check if the booking exists and belongs to the user
    if booking_id in bookings and bookings[booking_id]['user_token'] == user_token:
        # Remove the booking entry
        del bookings[booking_id]
        return True
    else:
        return False

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

User Authentication:

Endpoint: /api/auth/login
Method: POST
Parameters: username, password
Description: Handles user login and returns an authentication token.
Flight Search:

Endpoint: /api/flights/search
Method: GET
Parameters: origin, destination, departure_date, passengers
Description: Retrieves available flights based on search criteria.
Flight Booking:

Endpoint: /api/flights/book
Method: POST
Parameters: flight_id, passengers, payment_info, user_token
Description: Books a flight for the user and returns booking details.
Hotel Search:

Endpoint: /api/hotels/search
Method: GET
Parameters: destination, check_in_date, check_out_date, guests
Description: Retrieves available hotels based on search criteria.
Hotel Booking:

Endpoint: /api/hotels/book
Method: POST
Parameters: hotel_id, guests, payment_info, user_token
Description: Books a hotel for the user and returns booking details.
Booking Management:

Endpoint: /api/bookings
Method: GET
Parameters: user_token
Description: Retrieves all bookings made by the user.
Booking Cancellation:

Endpoint: /api/bookings/cancel
Method: POST
Parameters: booking_id, user_token
Description: Cancels a specific booking made by the user.

from flask import Flask, request, jsonify

app = Flask(__name__)

# In-memory data structures to simulate database
users = {}
flights = {}
hotels = {}
bookings = {}
booking_id_counter = 1

# Helper functions for token generation and validation
def generate_user_token(username):
    return f'TOKEN_{username}'

def validate_user_token(user_token):
    return user_token.startswith('TOKEN_')

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

    if username not in users:
        users[username] = {'password': password, 'email': email}
        return jsonify({'message': 'User registered successfully'}), 200
    else:
        return jsonify({'error': 'Username already exists'}), 409

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

    if username in users and users[username]['password'] == password:
        user_token = generate_user_token(username)
        return jsonify({'token': user_token}), 200
    else:
        return jsonify({'error': 'Invalid credentials'}), 401

# Flight Search
@app.route('/api/flights/search', methods=['GET'])
def search_flights():
    origin = request.args.get('origin')
    destination = request.args.get('destination')
    departure_date = request.args.get('departure_date')
    passengers = int(request.args.get('passengers'))

    # Implement flight search algorithm here
    # For demonstration, return dummy response
    available_flights = [
        {'id': 1, 'origin': origin, 'destination': destination, 'departure_date': departure_date, 'price': 200},
        {'id': 2, 'origin': origin, 'destination': destination, 'departure_date': departure_date, 'price': 150},
        {'id': 3, 'origin': origin, 'destination': destination, 'departure_date': departure_date, 'price': 250},
    ]
    return jsonify({'flights': available_flights}), 200

# Flight Booking
@app.route('/api/flights/book', methods=['POST'])
def book_flight():
    data = request.get_json()
    flight_id = data['flight_id']
    passengers = data['passengers']
    payment_info = data['payment_info']
    user_token = data['user_token']

    if validate_user_token(user_token):
        # Perform flight booking (simulated data)
        booking_id = book_flight_for_user(user_token, flight_id, passengers, payment_info)
        return jsonify({'booking_id': booking_id}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Hotel Search
@app.route('/api/hotels/search', methods=['GET'])
def search_hotels():
    destination = request.args.get('destination')
    check_in_date = request.args.get('check_in_date')
    check_out_date = request.args.get('check_out_date')
    guests = int(request.args.get('guests'))

    # Implement hotel search algorithm here
    # For demonstration, return dummy response
    available_hotels = [
        {'id': 1, 'name': 'Luxury Hotel', 'location': destination, 'price_per_night': 300},
        {'id': 2, 'name': 'Comfort Inn', 'location': destination, 'price_per_night': 200},
        {'id': 3, 'name': 'Business Hotel', 'location': destination, 'price_per_night': 180},
    ]
    return jsonify({'hotels': available_hotels}), 200

# Hotel Booking
@app.route('/api/hotels/book', methods=['POST'])
def book_hotel():
    data = request.get_json()
    hotel_id = data['hotel_id']
    guests = data['guests']
    payment_info = data['payment_info']
    user_token = data['user_token']

    if validate_user_token(user_token):
        # Perform hotel booking (simulated data)
        booking_id = book_hotel_for_user(user_token, hotel_id, guests, payment_info)
        return jsonify({'booking_id': booking_id}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Booking Management
@app.route('/api/bookings', methods=['GET'])
def get_bookings():
    user_token = request.args.get('user_token')

    if validate_user_token(user_token):
        # Retrieve bookings for the user (simulated data)
        user_bookings = get_user_bookings(user_token)
        return jsonify({'bookings': user_bookings}), 200
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Booking Cancellation
@app.route('/api/bookings/cancel', methods=['POST'])
def cancel_booking():
    data = request.get_json()
    booking_id = data['booking_id']
    user_token = data['user_token']

    if validate_user_token(user_token):
        # Cancel the booking (simulated data)
        success = cancel_user_booking(user_token, booking_id)
        if success:
            return jsonify({'message': 'Booking successfully cancelled'}), 200
        else:
            return jsonify({'error': 'Booking not found'}), 404
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Review and Rating Submission
@app.route('/api/reviews/submit', methods=['POST'])
def submit_review():
    data = request.get_json()
    user_token = data['user_token']
    booking_id = data['booking_id']
    review = data['review']
    rating = data['rating']

    if validate_user_token(user_token):
        # Store the review and rating in the bookings data
        if booking_id in bookings and bookings[booking_id]['user_token'] == user_token:
            bookings[booking_id]['review'] = review
            bookings[booking_id]['rating'] = rating
            return jsonify({'message': 'Review and rating submitted successfully'}), 200
        else:
            return jsonify({'error': 'Booking not found or does not belong to the user'}), 404
    else:
        return jsonify({'error': 'Invalid user token'}), 401

# Helper function for flight booking simulation
def book_flight_for_user(user_token, flight_id, passengers, payment_info):
    global booking_id_counter
    # Simulate booking creation and return booking ID
    booking_id = booking_id_counter
    bookings[booking_id] = {
        'user_token': user_token,
        'flight_id': flight_id,
        'passengers': passengers,
        'payment_info': payment_info
    }
    booking_id_counter += 1
    return booking_id

# Helper function for hotel booking simulation
def book_hotel_for_user(user_token, hotel_id, guests, payment_info):
    global booking_id_counter
    # Simulate booking creation and return booking ID
    booking_id = booking_id_counter
    bookings[booking_id] = {
        'user_token': user_token,
        'hotel_id': hotel_id,
        'guests': guests,
        'payment_info': payment_info
    }
    booking_id_counter += 1
    return booking_id

# Helper function to retrieve user's bookings
def get_user_bookings(user_token):
    # Simulate retrieval of bookings for the user
    return [booking for booking in bookings.values() if booking['user_token'] == user_token]

# Helper function to cancel a booking for the user
def cancel_user_booking(user_token, booking_id):
    # Check if the booking exists and belongs to the user
    if booking_id in bookings and bookings[booking_id]['user_token'] == user_token:
        # Remove the booking entry
        del bookings[booking_id]
        return True
    else:
        return False

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

User:

UserID: INT (Primary Key)
Username: STRING
Email: STRING
Password: STRING
Project:

ProjectID: INT (Primary Key)
CreatorID: INT (Foreign Key referencing User.UserID)
ProjectTitle: STRING
Description: STRING
FundingGoal: DECIMAL
CurrentPledgedAmount: DECIMAL
Category:

CategoryID: INT (Primary Key)
Name: STRING
Pledge:

PledgeID: INT (Primary Key)
BackerID: INT (Foreign Key referencing User.UserID)
ProjectID: INT (Foreign Key referencing Project.ProjectID)
PledgeAmount: DECIMAL
Timestamp: DATETIME
RewardTier:

RewardID: INT (Primary Key)
ProjectID: INT (Foreign Key referencing Project.ProjectID)
Title: STRING
Description: STRING
MinimumPledgeAmount: DECIMAL

from flask import Flask, request, jsonify

app = Flask(__name__)

# Mock data for demonstration purposes
users = {}
projects = {}
pledges = {}
feed_data = {}

# User Service - Register a new user
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data['username']
    email = data['email']
    password = data['password']

    if username in users:
        return jsonify({'message': 'Username already exists!'}), 400

    user_id = len(users) + 1
    users[username] = {
        'user_id': user_id,
        'email': email,
        'password': password
    }

    return jsonify({'message': 'User registered successfully!', 'user_id': user_id})

# User Service - User Login
@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    username = data['username']
    password = data['password']

    if username in users and users[username]['password'] == password:
        return jsonify({'message': 'Login successful!'})
    else:
        return jsonify({'message': 'Invalid credentials!'}), 401

# Project Service - Create a new project
@app.route('/api/create_project', methods=['POST'])
def create_project():
    data = request.get_json()
    creator = data['creator']
    project_title = data['project_title']
    description = data['description']
    funding_goal = data['funding_goal']

    creator_id = users[creator]['user_id']
    project_id = len(projects) + 1
    projects[project_id] = {
        'project_id': project_id,
        'creator_id': creator_id,
        'project_title': project_title,
        'description': description,
        'funding_goal': funding_goal,
        'current_pledged_amount': 0
    }

    return jsonify({'message': 'Project created successfully!', 'project_id': project_id})

# Project Service - Update an existing project
@app.route('/api/update_project/<int:project_id>', methods=['PUT'])
def update_project(project_id):
    data = request.get_json()
    if project_id in projects:
        projects[project_id]['description'] = data.get('description', projects[project_id]['description'])
        projects[project_id]['funding_goal'] = data.get('funding_goal', projects[project_id]['funding_goal'])
        return jsonify({'message': 'Project updated successfully!'})
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Pledge Service - Make a pledge to a project
@app.route('/api/pledge/<int:project_id>', methods=['POST'])
def make_pledge(project_id):
    data = request.get_json()
    backer = data['backer']
    pledge_amount = data['pledge_amount']

    if project_id in projects:
        backer_id = users[backer]['user_id']
        projects[project_id]['current_pledged_amount'] += pledge_amount
        pledge_id = len(pledges) + 1
        pledges[pledge_id] = {
            'pledge_id': pledge_id,
            'backer_id': backer_id,
            'project_id': project_id,
            'pledge_amount': pledge_amount
        }
        return jsonify({'message': 'Pledge made successfully!'})
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Feed Generation Service - Generate personalized project feed for a user
@app.route('/api/generate_feed/<int:user_id>', methods=['GET'])
def generate_feed(user_id):
    if user_id in users:
        followed_projects = [project for project in projects.values() if project['creator_id'] != user_id]
        followed_projects.sort(key=lambda x: x['current_pledged_amount'], reverse=True)

        feed = [{'project_id': project['project_id'], 'project_title': project['project_title'],
                 'description': project['description'], 'funding_goal': project['funding_goal'],
                 'current_pledged_amount': project['current_pledged_amount']} for project in followed_projects]

        feed_data[user_id] = feed  # Cache the feed for the user
        return jsonify(feed)
    else:
        return jsonify({'message': 'User not found!'}), 404

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

User:

UserID: Unique identifier for each user.
Username: Unique username for each user.
Email: Email address of the user.
Password: Encrypted password for user authentication.
Other attributes: Name, Bio, Profile Picture, etc.
Project:

ProjectID: Unique identifier for each project.
CreatorID: Foreign key referencing the UserID of the project creator.
Title: Title of the project.
Description: Description of the project.
FundingGoal: The amount of funding required to complete the project.
CurrentPledgedAmount: The current amount pledged by backers for the project.
Timestamp: Timestamp for project creation.
Pledge:

PledgeID: Unique identifier for each pledge.
BackerID: Foreign key referencing the UserID of the backer.
ProjectID: Foreign key referencing the ProjectID of the project being pledged to.
PledgeAmount: The amount pledged by the backer for the project.
Timestamp: Timestamp for pledge creation.

from flask import Flask, request, jsonify

app = Flask(__name__)

# Mock data for demonstration purposes
users = {}
projects = {}
pledges = {}

# Endpoint for user registration
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data['username']
    email = data['email']
    password = data['password']

    # Your code for user registration logic goes here
    # For now, we'll just store the user details in the 'users' dictionary
    users[username] = {
        'email': email,
        'password': password
    }

    return jsonify({'message': 'User registered successfully!'})

# Endpoint for user login
@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    username = data['username']
    password = data['password']

    # Your code for user login logic goes here
    # For now, we'll just check if the user exists in the 'users' dictionary
    if username in users and users[username]['password'] == password:
        return jsonify({'message': 'Login successful!'})
    else:
        return jsonify({'message': 'Invalid credentials!'}), 401

# Endpoint for creating a new project
@app.route('/api/create_project', methods=['POST'])
def create_project():
    data = request.get_json()
    creator = data['creator']
    project_title = data['project_title']
    description = data['description']
    funding_goal = data['funding_goal']

    # Your code for project creation logic goes here
    # For now, we'll just store the project details in the 'projects' dictionary
    project_id = len(projects) + 1
    projects[project_id] = {
        'creator': creator,
        'project_title': project_title,
        'description': description,
        'funding_goal': funding_goal,
        'current_pledged_amount': 0
    }

    return jsonify({'message': 'Project created successfully!', 'project_id': project_id})

# Endpoint for updating an existing project
@app.route('/api/update_project/<int:project_id>', methods=['PUT'])
def update_project(project_id):
    data = request.get_json()
    # Your code for updating project details goes here
    # For now, we'll just update the 'description' and 'funding_goal' fields
    if project_id in projects:
        projects[project_id]['description'] = data.get('description', projects[project_id]['description'])
        projects[project_id]['funding_goal'] = data.get('funding_goal', projects[project_id]['funding_goal'])
        return jsonify({'message': 'Project updated successfully!'})
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Endpoint for getting project details by ID
@app.route('/api/project/<int:project_id>', methods=['GET'])
def get_project(project_id):
    if project_id in projects:
        return jsonify(projects[project_id])
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Endpoint for making a pledge to a project
@app.route('/api/pledge/<int:project_id>', methods=['POST'])
def make_pledge(project_id):
    data = request.get_json()
    backer = data['backer']
    pledge_amount = data['pledge_amount']

    # Your code for pledge submission logic goes here
    # For now, we'll just update the 'current_pledged_amount' for the project
    if project_id in projects:
        projects[project_id]['current_pledged_amount'] += pledge_amount
        # Store pledge details for reference (in real-world scenario, you might need to handle payment processing)
        pledges.setdefault(project_id, []).append({
            'backer': backer,
            'pledge_amount': pledge_amount
        })
        return jsonify({'message': 'Pledge made successfully!'})
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Endpoint for discovering projects
@app.route('/api/discover', methods=['GET'])
def discover_projects():
    # Your code for project discovery logic goes here
    # For now, we'll return all projects in the 'projects' dictionary
    return jsonify(list(projects.values()))

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

User Registration:

Description: Allow users to create a new account on Kickstarter.
Method: POST
Endpoint: /api/register
Request Body: {"username": "exampleuser", "email": "[email protected]", "password": "mypassword"}
Response: {"message": "User registered successfully!", "user_id": "exampleuser"}
User Login:

Description: Allow users to log in to their account on Kickstarter.
Method: POST
Endpoint: /api/login
Request Body: {"username": "exampleuser", "password": "mypassword"}
Response: {"message": "Login successful!", "user_id": "exampleuser"}
Create Project:

Description: Allow project creators to create a new project.
Method: POST
Endpoint: /api/projects
Request Body: {"user_id": "exampleuser", "title": "My Awesome Project", "description": "This is a description", "funding_goal": 10000}
Response: {"message": "Project created successfully!", "project_id": "project123"}
Update Project:

Description: Allow project creators to update an existing project.
Method: PUT
Endpoint: /api/projects/{project_id}
Request Body: {"title": "Updated Project Title", "description": "Updated project description"}
Response: {"message": "Project updated successfully!"}
Make Pledge:

Description: Allow users to make a pledge to a project.
Method: POST
Endpoint: /api/projects/{project_id}/pledges
Request Body: {"user_id": "exampleuser", "pledge_amount": 50}
Response: {"message": "Pledge made successfully!"}
Get Project Details:

Description: Retrieve details of a specific project.
Method: GET
Endpoint: /api/projects/{project_id}
Response: {"project_id": "project123", "title": "My Awesome Project", "description": "This is a description", "funding_goal": 10000, "current_pledged_amount": 5000}
Get User Pledges:

Description: Retrieve a list of pledges made by a user.
Method: GET
Endpoint: /api/users/{user_id}/pledges
Response: {"pledges": [{"project_id": "project123", "pledge_amount": 50}, {"project_id": "project456", "pledge_amount": 25}]}
Get Project Backers:

Description: Retrieve a list of backers for a project.
Method: GET
Endpoint: /api/projects/{project_id}/backers
Response: {"backers": ["user1", "user2", "user3"]}

User API Endpoints:

/api/register (POST): Register a new user.
/api/login (POST): Authenticate a user.

Project API Endpoints:

/api/create_project (POST): Create a new project.
/api/update_project/<project_id> (PUT): Update an existing project.
/api/project/<project_id> (GET): Get project details by ID.

Pledge API Endpoints:

/api/pledge/<project_id> (POST): Make a pledge to a project.

Discover API Endpoints:

/api/discover (GET): Get a list of projects based on different criteria (e.g., category, popularity).

from flask import Flask, request, jsonify
import uuid

app = Flask(__name__)

class User:
    def __init__(self, user_id, username, password):
        self.user_id = user_id
        self.username = username
        self.password = password
        self.projects_created = []
        self.pledges_made = []

class Project:
    def __init__(self, project_id, creator_id, title, description, funding_goal):
        self.project_id = project_id
        self.creator_id = creator_id
        self.title = title
        self.description = description
        self.funding_goal = funding_goal
        self.current_pledged_amount = 0

class Pledge:
    def __init__(self, pledge_id, backer_id, project_id, pledge_amount):
        self.pledge_id = pledge_id
        self.backer_id = backer_id
        self.project_id = project_id
        self.pledge_amount = pledge_amount

# Data storage
users = {}
projects = {}
pledges = {}

# Helper functions
def generate_user_id():
    return str(uuid.uuid4())

def generate_project_id():
    return str(uuid.uuid4())

def generate_pledge_id():
    return str(uuid.uuid4())

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

    if not username or not password:
        return jsonify({"error": "Invalid data. Username and password are required."}), 400

    for user in users.values():
        if user.username == username:
            return jsonify({"error": "Username already exists. Please choose a different username."}), 400

    user_id = generate_user_id()
    user = User(user_id, username, password)
    users[user_id] = user

    return jsonify({"message": "User registered successfully!", "user_id": user_id}), 201

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

    if not username or not password:
        return jsonify({"error": "Invalid data. Username and password are required."}), 400

    for user in users.values():
        if user.username == username and user.password == password:
            return jsonify({"message": "Login successful!", "user_id": user.user_id}), 200

    return jsonify({"error": "Invalid username or password. Please try again."}), 401

# Create Project API
@app.route('/api/projects', methods=['POST'])
def create_project():
    data = request.get_json()
    user_id = data.get('user_id')
    title = data.get('title')
    description = data.get('description')
    funding_goal = data.get('funding_goal')

    if not user_id or not title or not description or not funding_goal:
        return jsonify({"error": "Invalid data. User ID, title, description, and funding goal are required."}), 400

    user = users.get(user_id)
    if not user:
        return jsonify({"error": "User not found. Please register or login first."}), 404

    project_id = generate_project_id()
    project = Project(project_id, user_id, title, description, funding_goal)
    projects[project_id] = project

    user.projects_created.append(project_id)

    return jsonify({"message": "Project created successfully!", "project_id": project_id}), 201

# Update Project API
@app.route('/api/projects/<string:project_id>', methods=['PUT'])
def update_project(project_id):
    data = request.get_json()
    title = data.get('title')
    description = data.get('description')

    if not title and not description:
        return jsonify({"error": "Invalid data. At least one of title or description is required."}), 400

    project = projects.get(project_id)
    if not project:
        return jsonify({"error": "Project not found. Please provide a valid project ID."}), 404

    if title:
        project.title = title
    if description:
        project.description = description

    return jsonify({"message": "Project updated successfully!"}), 200

# Make Pledge API
@app.route('/api/projects/<string:project_id>/pledges', methods=['POST'])
def make_pledge(project_id):
    data = request.get_json()
    user_id = data.get('user_id')
    pledge_amount = data.get('pledge_amount')

    if not user_id or not pledge_amount:
        return jsonify({"error": "Invalid data. User ID and pledge amount are required."}), 400

    user = users.get(user_id)
    project = projects.get(project_id)

    if not user or not project:
        return jsonify({"error": "User or Project not found. Please provide valid user and project IDs."}), 404

    if project.funding_goal <= project.current_pledged_amount:
        return jsonify({"error": "Project has already reached its funding goal. No more pledges can be made."}), 400

    if pledge_amount <= 0:
        return jsonify({"error": "Invalid pledge amount. Please enter a positive amount."}), 400

    if pledge_amount > project.funding_goal - project.current_pledged_amount:
        return jsonify({"error": "Pledge amount exceeds the remaining funding goal."}), 400

    pledge_id = generate_pledge_id()
    pledge = Pledge(pledge_id, user_id, project_id, pledge_amount)
    pledges[pledge_id] = pledge

    project.current_pledged_amount += pledge_amount
    user.pledges_made.append(pledge_id)

    return jsonify({"message": "Pledge made successfully!"}), 200

# Get Project Details API
@app.route('/api/projects/<string:project_id>', methods=['GET'])
def get_project_details(project_id):
    project = projects.get(project_id)
    if not project:
        return jsonify({"error": "Project not found. Please provide a valid project ID."}), 404

    return jsonify({"project_id": project.project_id, "title": project.title, "description": project.description,
                    "funding_goal": project.funding_goal, "current_pledged_amount": project.current_pledged_amount}), 200

# Get User Pledges API
@app.route('/api/users/<string:user_id>/pledges', methods=['GET'])
def get_user_pledges(user_id):
    user = users.get(user_id)
    if not user:
        return jsonify({"error": "User not found. Please provide a valid user ID."}), 404

    user_pledges = []
    for pledge_id in user.pledges_made:
        pledge = pledges.get(pledge_id)
        if pledge:
            user_pledges.append({"project_id": pledge.project_id, "pledge_amount": pledge.pledge_amount})

    return jsonify({"pledges": user_pledges}), 200

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

from flask import Flask, request, jsonify

app = Flask(__name__)

# Mock data for demonstration purposes
users = {}
projects = {}
pledges = {}

# Function for user registration
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data['username']
    email = data['email']
    password = data['password']

    users[username] = {
        'email': email,
        'password': password
    }

    return jsonify({'message': 'User registered successfully!'})

# Function for user login
@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    username = data['username']
    password = data['password']

    if username in users and users[username]['password'] == password:
        return jsonify({'message': 'Login successful!'})
    else:
        return jsonify({'message': 'Invalid credentials!'}), 401

# Function for creating a new project
@app.route('/api/create_project', methods=['POST'])
def create_project():
    data = request.get_json()
    creator = data['creator']
    project_title = data['project_title']
    description = data['description']
    funding_goal = data['funding_goal']

    project_id = len(projects) + 1
    projects[project_id] = {
        'creator': creator,
        'project_title': project_title,
        'description': description,
        'funding_goal': funding_goal,
        'current_pledged_amount': 0
    }

    return jsonify({'message': 'Project created successfully!', 'project_id': project_id})

# Function for updating an existing project
@app.route('/api/update_project/<int:project_id>', methods=['PUT'])
def update_project(project_id):
    data = request.get_json()
    if project_id in projects:
        projects[project_id]['description'] = data.get('description', projects[project_id]['description'])
        projects[project_id]['funding_goal'] = data.get('funding_goal', projects[project_id]['funding_goal'])
        return jsonify({'message': 'Project updated successfully!'})
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Function for getting project details by ID
@app.route('/api/project/<int:project_id>', methods=['GET'])
def get_project(project_id):
    if project_id in projects:
        return jsonify(projects[project_id])
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Function for making a pledge to a project
@app.route('/api/pledge/<int:project_id>', methods=['POST'])
def make_pledge(project_id):
    data = request.get_json()
    backer = data['backer']
    pledge_amount = data['pledge_amount']

    if project_id in projects:
        projects[project_id]['current_pledged_amount'] += pledge_amount
        pledges.setdefault(project_id, []).append({
            'backer': backer,
            'pledge_amount': pledge_amount
        })
        return jsonify({'message': 'Pledge made successfully!'})
    else:
        return jsonify({'message': 'Project not found!'}), 404

# Function for discovering projects
@app.route('/api/discover', methods=['GET'])
def discover_projects():
    return jsonify(list(projects.values()))

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

import time

# File Sharing System Simulation
class FileSharingSystem:
    def __init__(self, total_users, dau, videos_watched_per_user_per_day, read_write_ratio, video_size_mb):
        self.total_users = total_users
        self.dau = dau
        self.videos_watched_per_user_per_day = videos_watched_per_user_per_day
        self.read_write_ratio = read_write_ratio
        self.video_size_mb = video_size_mb
        self.total_videos_watched_per_day = dau * videos_watched_per_user_per_day
        self.total_videos_uploaded_per_day = self.total_videos_watched_per_day // read_write_ratio
        self.total_storage_per_day_mb = self.total_videos_uploaded_per_day * video_size_mb
        self.total_storage_per_day_tb = self.total_storage_per_day_mb / 1024
        self.total_storage_next_3_years_pb = self.total_storage_per_day_tb * 365 * 3
        self.requests_per_second = self.total_videos_watched_per_day / (3600 * 24)

    def print_simulation_results(self):
        print("Total Users:", self.total_users)
        print("Daily Active Users (DAU):", self.dau)
        print("Videos Watched per User per Day:", self.videos_watched_per_user_per_day)
        print("Total Videos Watched per Day:", self.total_videos_watched_per_day)
        print("Total Videos Uploaded per Day:", self.total_videos_uploaded_per_day)
        print("Total Storage per Day (TB):", self.total_storage_per_day_tb)
        print("Total Storage for Next 3 Years (PB):", self.total_storage_next_3_years_pb)
        print("Requests per Second:", self.requests_per_second)


# Example numbers and simulation
total_users = 1200000000
daily_active_users = 300000000
videos_watched_per_user_per_day = 3
read_write_ratio = 100
video_size_mb = 80

file_sharing_system = FileSharingSystem(total_users, daily_active_users, videos_watched_per_user_per_day,
                                        read_write_ratio, video_size_mb)

print("File Sharing System Simulation Results:")
file_sharing_system.print_simulation_results()

Users

UserID (Primary Key)
Username
Email
Password

Files

FileID (Primary Key)
UserID (Foreign Key)
Filename
Size
ContentType
UploadDate

SharedFiles

SharedFileID (Primary Key)
FileID (Foreign Key)
SharedWithUserID (Foreign Key)
Permission
SharedDate

Metadata

MetadataID (Primary Key)
FileID (Foreign Key)
Key
Value

class User:
    def __init__(self, user_id, username, password, files_uploaded=None):
        self.user_id = user_id
        self.username = username
        self.password = password
        self.files_uploaded = files_uploaded if files_uploaded is not None else []

class File:
    def __init__(self, file_id, filename, size, content_type, upload_date, owner):
        self.file_id = file_id
        self.filename = filename
        self.size = size
        self.content_type = content_type
        self.upload_date = upload_date
        self.owner = owner

class FileShare:
    def __init__(self, share_id, file_id, shared_with, permission, share_date):
        self.share_id = share_id
        self.file_id = file_id
        self.shared_with = shared_with
        self.permission = permission
        self.share_date = share_date

# Sample data storage
users = {
    "user1": User(1, "user1", "password1"),
    "user2": User(2, "user2", "password2"),
}

files = {
    1: File(1, "example_file.txt", 1024, "text/plain", "2023-07-20 10:00:00", "user1"),
}

file_shares = {
    1: FileShare(1, 1, "user2", "read-only", "2023-07-20 11:00:00"),
}

from flask import Flask, request, jsonify

app = Flask(__name__)

users = {}
files = {}
shares = {}

# User Registration
@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data['username']
    email = data['email']
    password = data['password']
    
    if username in users:
        return jsonify({"error": "Username already exists!"}), 409

    user_id = len(users) + 1
    users[username] = {
        "userID": user_id,
        "username": username,
        "email": email,
        "password": password,
        "files_uploaded": []
    }
    return jsonify({"message": "User registered successfully!"}), 200

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

    if username not in users or users[username]['password'] != password:
        return jsonify({"error": "Invalid username or password!"}), 401

    return jsonify({"message": "Login successful!"}), 200

# File Upload
@app.route('/api/upload', methods=['POST'])
def upload_file():
    data = request.get_json()
    username = data['username']
    filename = data['filename']
    content_type = data['content_type']
    file_data = data['file']

    if username not in users:
        return jsonify({"error": "User not found!"}), 404

    file_id = len(files) + 1
    files[file_id] = {
        "fileID": file_id,
        "filename": filename,
        "content_type": content_type,
        "file_data": file_data,
        "owner": users[username]['userID']
    }

    users[username]['files_uploaded'].append(file_id)

    return jsonify({"message": "File upload successful!"}), 200

# File Share
@app.route('/api/share', methods=['POST'])
def share_file():
    data = request.get_json()
    file_id = data['fileID']
    shared_with = data['shared_with']
    permission = data['permission']

    if file_id not in files:
        return jsonify({"error": "File not found!"}), 404

    shares[len(shares) + 1] = {
        "shareID": len(shares) + 1,
        "fileID": file_id,
        "shared_with": shared_with,
        "permission": permission
    }

    return jsonify({"message": "File shared successfully!"}), 200

# User Files
@app.route('/api/user-files/<username>', methods=['GET'])
def get_user_files(username):
    if username not in users:
        return jsonify({"error": "User not found!"}), 404

    user_files = []
    for file_id in users[username]['files_uploaded']:
        if file_id in files:
            user_files.append(files[file_id])

    return jsonify(user_files), 200

# Shared Files
@app.route('/api/shared-files/<username>', methods=['GET'])
def get_shared_files(username):
    shared_files = []
    for share_id, share in shares.items():
        if share['shared_with'] == username:
            file_id = share['fileID']
            if file_id in files:
                shared_files.append(files[file_id])

    return jsonify(shared_files), 200

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

from flask import Flask, request, jsonify
import uuid

app = Flask(__name__)

# In-memory data storage for simplicity
users = []
files = []
shared_files = []

# Helper function to get a user by username
def get_user(username):
    return next((user for user in users if user["username"] == username), None)

# Helper function to get a file by ID
def get_file(file_id):
    return next((file for file in files if file["file_id"] == file_id), None)

# Helper function to check if a user is authorized to access a file
def is_authorized(user, file_id):
    return any(sf for sf in shared_files if sf["file_id"] == file_id and sf["shared_with"] == user["email"])

@app.route('/api/register', methods=['POST'])
def register_user():
    data = request.get_json()
    username = data["username"]
    email = data["email"]
    password = data["password"]
    user = get_user(username)
    if user:
        return jsonify({"error": "Username already exists!"}), 409
    new_user = {"id": str(uuid.uuid4()), "username": username, "email": email, "password": password}
    users.append(new_user)
    return jsonify({"message": "User registered successfully!"}), 201

@app.route('/api/login', methods=['POST'])
def login_user():
    data = request.get_json()
    username = data["username"]
    password = data["password"]
    user = get_user(username)
    if not user or user["password"] != password:
        return jsonify({"error": "Invalid username or password!"}), 401
    return jsonify({"token": user["id"]}), 200

@app.route('/api/upload', methods=['POST'])
def upload_file():
    token = request.headers.get('Authorization')
    if not token or not get_user_by_id(token):
        return jsonify({"error": "Unauthorized!"}), 401
    # File upload logic here
    # Store file information in the 'files' list
    return jsonify({"message": "File uploaded successfully!"}), 201

@app.route('/api/files', methods=['GET'])
def get_user_files():
    token = request.headers.get('Authorization')
    user = get_user_by_id(token)
    if not user:
        return jsonify({"error": "Unauthorized!"}), 401
    user_files = [file for file in files if file["user_id"] == user["id"]]
    return jsonify({"files": user_files}), 200

@app.route('/api/file/<file_id>', methods=['GET'])
def download_file(file_id):
    token = request.headers.get('Authorization')
    user = get_user_by_id(token)
    if not user or not is_authorized(user, file_id):
        return jsonify({"error": "Unauthorized!"}), 401
    file_data = get_file(file_id)
    if not file_data:
        return jsonify({"error": "File not found!"}), 404
    # File download logic here
    return jsonify({"file_data": file_data}), 200

@app.route('/api/file/<file_id>', methods=['DELETE'])
def delete_file(file_id):
    token = request.headers.get('Authorization')
    user = get_user_by_id(token)
    if not user or not is_authorized(user, file_id):
        return jsonify({"error": "Unauthorized!"}), 401
    file_data = get_file(file_id)
    if not file_data:
        return jsonify({"error": "File not found!"}), 404
    # File deletion logic here
    return jsonify({"message": "File deleted successfully!"}), 200

@app.route('/api/share', methods=['POST'])
def share_file():
    token = request.headers.get('Authorization')
    user = get_user_by_id(token)
    if not user:
        return jsonify({"error": "Unauthorized!"}), 401
    data = request.get_json()
    file_id = data["file_id"]
    shared_with = data["shared_with"]
    permission = data["permission"]
    if not is_authorized(user, file_id):
        return jsonify({"error": "Unauthorized!"}), 401
    # File sharing logic here
    shared_files.append({"file_id": file_id, "shared_with": shared_with, "permission": permission})
    return jsonify({"message": "File shared successfully!"}), 201

@app.route('/api/shared', methods=['GET'])
def get_shared_files():
    token = request.headers.get('Authorization')
    user = get_user_by_id(token)
    if not user:
        return jsonify({"error": "Unauthorized!"}), 401
    user_shared_files = [sf for sf in shared_files if sf["shared_with"] == user["email"]]
    return jsonify({"shared_files": user_shared_files}), 200

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

User Authentication and Authorization:
POST /api/register - User registration endpoint.

Request body: { "username": "example_user", "email": "[email protected]", "password": "password123" }
Response: { "message": "User registered successfully!" }
POST /api/login - User login endpoint.

Request body: { "username": "example_user", "password": "password123" }
Response: { "token": "<user_authentication_token>" }
File Management:
POST /api/upload - Upload a file endpoint.

Request body: { "file": <file_data> }
Response: { "message": "File uploaded successfully!" }
GET /api/files - Get a list of user files endpoint.

Request Header: { "Authorization": "Bearer <user_authentication_token>" }
Response: { "files": [<list_of_files>] }
GET /api/file/:id - Download a file endpoint.

Request Header: { "Authorization": "Bearer <user_authentication_token>" }
Response: { "file_data": <file_data> }
DELETE /api/file/:id - Delete a file endpoint.

Request Header: { "Authorization": "Bearer <user_authentication_token>" }
Response: { "message": "File deleted successfully!" }
File Sharing and Collaboration:
POST /api/share - Share a file with another user endpoint.

Request Header: { "Authorization": "Bearer <user_authentication_token>" }
Request body: { "file_id": "<file_id>", "shared_with": "[email protected]", "permission": "read" }
Response: { "message": "File shared successfully!" }
GET /api/shared - Get files shared with the user endpoint.

Request Header: { "Authorization": "Bearer <user_authentication_token>" }
Response: { "shared_files": [<list_of_shared_files>] }