import { dataSource } from "../data-source";
import { newsletter } from "../entity/newsletter";
import InternalException from "../exceptions/internalException";

export default abstract class NewsletterService {
  /**
   * @description get all newsletters
   * @returns {Promise<[Array<newsletter>, number]>}
   */
  static async getAll(offset: number = 0, count: number = 25): Promise<[Array<newsletter>, number]> {
    return await dataSource
      .getRepository(newsletter)
      .createQueryBuilder("newsletter")
      .offset(offset)
      .limit(count)
      .getManyAndCount()
      .then((res) => {
        return res;
      })
      .catch((err) => {
        throw new InternalException("newsletters not found", err);
      });
  }

  /**
   * @description get newsletter by id
   * @returns {Promise<newsletter>}
   */
  static async getById(id: number): Promise<newsletter> {
    return await dataSource
      .getRepository(newsletter)
      .createQueryBuilder("newsletter")
      .leftJoinAndSelect("newsletter.recipientsByQuery", "query")
      .where("newsletter.id = :id", { id: id })
      .getOneOrFail()
      .then((res) => {
        return res;
      })
      .catch((err) => {
        throw new InternalException("newsletter not found by id", err);
      });
  }
}