Posts

function solution() {
    class Post {
        constructor(title, content) {
            this.title = title;
            this.content = content;
        }

        toString() {
            return `Post: ${this.title}\n` + `Content: ${this.content}`;
        }
    }

    class SocialMediaPost extends Post {
        constructor(title, content, likes, dislikes) {
            super(title, content);
            this.likes = likes;
            this.dislikes = dislikes;
            this._comments = [];
        }

        addComment(comment) {
            this._comments.push(comment);
        }

        toString() {
            return  super.toString() + '\n' +
                `Rating: ${this.likes - this.dislikes}` + (this._comments.length ? '\nComments:' + '\n' +
                (this._comments.map(c => ` * ${c}`).join('\n')) : '');
        }
    }

    class BlogPost extends Post {
        constructor(title, content, views) {
            super(title, content);
            this.views = views;
        }

        view() {
            this.views++;
            return this;
        }

        toString() {
            return super.toString() + '\n' + `Views: ${this.views}`;
        }
    }

    return {Post, SocialMediaPost, BlogPost};
}