folder structure

src/service/user/roleService.ts

@@ -0,0 +1,43 @@
+import { dataSource } from "../../data-source";
+import { role } from "../../entity/user/role";
+import InternalException from "../../exceptions/internalException";
+
+export default abstract class RoleService {
+  /**
+   * @description get roles
+   * @returns {Promise<Array<role>>}
+   */
+  static async getAll(): Promise<Array<role>> {
+    return await dataSource
+      .getRepository(role)
+      .createQueryBuilder("role")
+      .leftJoinAndSelect("role.permissions", "role_permissions")
+      .getMany()
+      .then((res) => {
+        return res;
+      })
+      .catch((err) => {
+        throw new InternalException("roles not found", err);
+      });
+  }
+
+  /**
+   * @description get role by id
+   * @param id number
+   * @returns {Promise<role>}
+   */
+  static async getById(id: number): Promise<role> {
+    return await dataSource
+      .getRepository(role)
+      .createQueryBuilder("role")
+      .leftJoinAndSelect("role.permissions", "role_permissions")
+      .where("role.id = :id", { id: id })
+      .getOneOrFail()
+      .then((res) => {
+        return res;
+      })
+      .catch((err) => {
+        throw new InternalException("role not found by id", err);
+      });
+  }
+}