story

class Story {
    constructor(title, creator) {
        this.title = title;
        this.creator = creator;
        this._comments = []; // {Id, Username, Content, Replies: [{Id, Username, Content}]}
        this._likes = []; //usernames
    }
    get likes() {
        if (this._likes.length === 0) {
            return `${this.title} has 0 likes`;
        }
        if (this._likes.length === 1) {
            return `${this._likes[0]} likes this story!`;
        }
        return `${this._likes[0]} and ${
            this._likes.length - 1
        } others like this story!`;
    }
    like(username) {
        if (this._likes.includes(username)) {
            throw new Error("You can't like the same story twice!");
        }
        if (this.creator === username) {
            throw new Error("You can't like your own story!");
        }
        this._likes.push(username);
        return `${username} liked ${this.title}!`;
    }
    dislike(username) {
        let idx = this._likes.findIndex((u) => u === username);
        if (idx === -1) {
            throw new Error("You can't dislike this story!");
        }

        this._likes.splice(idx, 1);

        return `${username} disliked ${this.title}`;
    }
    comment(username, content, id) {
        let existingComment = this._comments.find((c) => c.Id === id);
        if (id === undefined || existingComment === undefined) {
            this._comments.push({
                Id: this._comments.length + 1,
                Username: username,
                Content: content,
                Replies: [],
            });
            return `${username} commented on ${this.title}`;
        }
        existingComment.Replies.push({
            Id: `${id}.${existingComment.Replies.length + 1}`,
            Username: username,
            Content: content,
        });
        return 'You replied successfully';
    }
    toString(sortingType) {
        let result = [
            `Title: ${this.title}
Creator: ${this.creator}
Likes: ${this._likes.length}
Comments:`,
        ];
        let sorted;
        if (sortingType == 'asc') {
            this._comments
                .sort((a, b) => a.Id - b.Id)
                .forEach((c) => c.Replies.sort((a, b) => a.Id - b.Id));
        } else if (sortingType == 'desc') {
            this._comments
                .sort((a, b) => b.Id - a.Id)
                .forEach((c) => c.Replies.sort((a, b) => b.Id - a.Id));
        } else if (sortingType == 'username') {
            this._comments
                .sort((a, b) => a.Username.localeCompare(b.Username))
                .forEach((c) =>
                    c.Replies.sort((a, b) =>
                        a.Username.localeCompare(b.Username)
                    )
                );
        }

        this._comments.forEach((c) => {
            result.push(`-- ${c.Id}. ${c.Username}: ${c.Content}`);
            c.Replies.forEach((r) =>
                result.push(`--- ${r.Id}. ${r.Username}: ${r.Content}`)
            );
        });

        return result.join('\n');
    }
}