03. Comments (Assoc Array)

function solve(input){

    let userList = new Set();
    let articleList = new Set();
    let articleInstances = [];

class Article{
    constructor(articleName){
        this.title = articleName;
        this.commentedUsers = [];
        this.comments = [];
        this.size = 0;
    }

    addComment(user,comment){
        this.commentedUsers.push(user);
        this.comments.push(comment);
        let currentLength = this.size;
        currentLength ++;
        this.size = currentLength;
    }


}


///functions
const addArticle = (name) =>{

    if(!Array.from(articleList).includes(name)){
        let article = new Article(name);
        articleInstances.push(article);
        articleList.add(name);
    }
}
const addInfo = (username, articleName, commentTitle,commentContent) => {
    let users = Array.from(userList);
    let articles = Array.from(articleList);
    let index = articles.indexOf(articleName);
    if(users.includes(username) && index > -1){
        // create comment object
        let comment = {};
        comment.title = commentTitle
        comment.content = commentContent;
        comment.name = username;
        //get article from article instances
        let articleObject = articleInstances[index];
        articleObject.addComment(username,comment)
        //update article
    }
}
//functions End


for (const line of input) {
    let arr = line.split(' ');

    if(arr[0] === 'user'){
        let userName = arr[1];
         //addUser
            userList.add(userName);
    }else if(arr[0] === 'article'){
        //addArticle
        let articleName = arr.slice(1).join(' ');
        addArticle(articleName);
    }else if(arr[1] === 'posts' && arr[2] === 'on'){
        //add info
        let user = arr[0];
        let helper = arr.slice(3,4)[0];
        let article = helper.split(':')[0];
        let commentPart = line.split(': ')[1];
        let [commentTitle, commentContent] = commentPart.split(', ');

       addInfo(user, article, commentTitle,commentContent);
    }
}



let sortedInstances = articleInstances.slice(0).sort((a,b)=>{
    return b.size - a.size;
})

for (const article of sortedInstances) {
    console.log(`Comments on ${article.title}`);
    let commentaries = article.comments.sort((a,b)=>{
        return a.name.localeCompare(b.name);
    })
    commentaries.forEach(one=>{
        console.log(`--- From user ${one.name}: ${one.title} - ${one.content}`);

    })
}

}