template preparation

src/service/templateUsageService.ts

@@ -0,0 +1,46 @@
+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;
+      });
+  }
+}