Press House

function pressHouse() {

    class Article {
        constructor(title, content) {
            this.title = title;
            this.content = content;
        }

        toString() {
            return `Title: ${this.title}\nContent: ${this.content}`
        }
    }

    class ShortReports extends Article {
        constructor(title, content, originalResearch) {
            super(title, content);
            this.originalResearch = originalResearch;
            this.comments = [];

            if (content.length > 150) {
                throw Error("Short reports content should be less then 150 symbols.")
            }

            if (!originalResearch.author || !originalResearch.title) {
                throw Error("The original research should have author and title.")
            }
        }

        addComment(comment) {
            this.comments.push(comment);
            return "The comment is added."
        }

        toString() {
        let result = [
        super.toString(),
        `Original Research: ${this.originalResearch.title} by ${this.originalResearch.author}`,
            ];
        if (this.comments.length > 0) {
        result.push(`Comments:`);
        this.comments.forEach((c) => result.push(c));
      }
      return result.join("\n");
    }
    }

    class BookReview extends Article {
        constructor(title, content, book) {
            super(title, content);
            this.book = book;
            this.clients = []
        }

        addClient(clientName, orderDescription) {
            const clientPresent = this.clients.find((x) => { return x.clientName === clientName });
            if (clientPresent) {
                throw Error('This client has already ordered this review.')
            }

            this.clients.push({ clientName, orderDescription });

            return `${clientName} has ordered a review for ${this.book.name}`
        }

        toString() {
        let result = [super.toString()];
        result.push(`Book: ${this.book.name}`);
        if (this.clients.length > 0) {
        result.push(`Orders:`);
        this.clients.forEach((c) =>
          result.push(`${c.clientName} - ${c.orderDescription}`)
        );
      }
      return result.join("\n");
    }
    }


    return {
        Article,
        ShortReports,
        BookReview
    }
}