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

export default abstract class TemplateUsageService {
  /**
   * @description get all templateUsages
   * @returns {Promise<Array<templateUsage>>}
   */
  static async getAll(): Promise<Array<templateUsage>> {
    return await dataSource
      .getRepository(templateUsage)
      .createQueryBuilder("templateUsage")
      .leftJoinAndSelect("templateUsage.header", "headerTemplate")
      .leftJoinAndSelect("templateUsage.body", "bodyTemplate")
      .leftJoinAndSelect("templateUsage.footer", "footerTemplate")
      .getMany()
      .then((res) => {
        return res;
      })
      .catch((err) => {
        throw new InternalException("templates not found", err);
      });
  }

  /**
   * @description get template by scope
   * @returns {Promise<templateUsage>}
   */
  static async getByScope(scope: string): Promise<templateUsage | null> {
    return await dataSource
      .getRepository(templateUsage)
      .createQueryBuilder("templateUsage")
      .leftJoinAndSelect("templateUsage.header", "headerTemplate")
      .leftJoinAndSelect("templateUsage.body", "bodyTemplate")
      .leftJoinAndSelect("templateUsage.footer", "footerTemplate")
      .where("templateUsage.scope = :scope", { scope: scope })
      .getOneOrFail()
      .then((res) => {
        return res;
      })
      .catch((err): null => {
        return null;
      });
  }
}