Twitter (keeping list/map inside class)

gistfile1.txt

class User {
    constructor() {
        this.users = new Map();
    }

    registerUser(userId, fullName, phone, age) {
        if (!this.users.has(userId)) {
            const newUser = { userId, fullName, phone, age };
            this.users.set(userId, newUser);
            return newUser;
        }
        return "User already exists";
    }
}

class Follow {
    constructor() {
        this.follows = [];
    }

    addFollow(followee, follower) {
        this.follows.push({ followee, follower });
    }

    getFollowees(userId) {
        return this.follows
            .filter(follow => follow.follower === userId)
            .map(follow => follow.followee);
    }
}

class Tweet {
    constructor() {
        this.tweets = [];
        this.follows = new Follow(); // Initialize Follow inside Tweet
    }

    addTweet(userId, post) {
        const newTweet = { userId, post };
        this.tweets.push(newTweet);
        return newTweet;
    }

    getFolloweeTweets(userId) {
        const followeeList = this.follows.getFollowees(userId);
        return this.tweets.filter(tweet => followeeList.includes(tweet.userId));
    }
}

// Example usage:

// Initialize classes
const userSystem = new User();
const followSystem = new Follow();
const tweetSystem = new Tweet();

// Register users
userSystem.registerUser('u1', 'John Doe', '123-456-7890', 30);
userSystem.registerUser('u2', 'Jane Smith', '987-654-3210', 25);

// Add follow relationships
followSystem.addFollow('u2', 'u1'); // John follows Jane

// Add tweets
tweetSystem.addTweet('u1', 'Hello world!'); // John's tweet
tweetSystem.addTweet('u2', 'Good morning!'); // Jane's tweet

// Link follows to tweets
tweetSystem.follows = followSystem;

// Get followee tweets for user 'u1'
const followeeTweets = tweetSystem.getFolloweeTweets('u1');
console.log(followeeTweets);