refactor: subscriptions to nestjs

packages/server-nest/src/modules/Roles/commands/EditRole.service.ts

@@ -0,0 +1,57 @@
+import { Knex } from 'knex';
+import { IRoleEditedPayload } from '../Roles.types';
+import { EventEmitter2 } from '@nestjs/event-emitter';
+import { events } from '@/common/events/events';
+import { EditRoleDto } from '../dtos/Role.dto';
+import { Inject, Injectable } from '@nestjs/common';
+import { TenantModelProxy } from '@/modules/System/models/TenantBaseModel';
+import { Role } from '../models/Role.model';
+import { TransformerInjectable } from '@/modules/Transformer/TransformerInjectable.service';
+import { UnitOfWork } from '@/modules/Tenancy/TenancyDB/UnitOfWork.service';
+
+@Injectable()
+export class EditRoleService {
+  constructor(
+    private readonly uow: UnitOfWork,
+    private readonly eventPublisher: EventEmitter2,
+    private readonly transformer: TransformerInjectable,
+
+    @Inject(Role.name)
+    private readonly roleModel: TenantModelProxy<typeof Role>,
+  ) {}
+
+  /**
+   * Edits details of the given role on the storage.
+   * @param {number} roleId - Role id.
+   * @param {IEditRoleDTO} editRoleDTO - Edit role DTO.
+   */
+  public async editRole(roleId: number, editRoleDTO: EditRoleDto) {
+    // Validates the invalid permissions.
+    this.validateInvalidPermissions(editRoleDTO.permissions);
+
+    // Retrieve the given role or throw not found serice error.
+    const oldRole = await this.getRoleOrThrowError(roleId);
+
+    const permissions = editRoleDTO.permissions;
+
+    // Updates the role on the storage.
+    return this.uow.withTransaction(async (trx: Knex.Transaction) => {
+      // Updates the given role to the storage.
+      const role = await this.roleModel().query(trx).upsertGraph({
+        id: roleId,
+        name: editRoleDTO.roleName,
+        description: editRoleDTO.roleDescription,
+        permissions,
+      });
+      // Triggers `onRoleEdited` event.
+      await this.eventPublisher.emitAsync(events.roles.onEdited, {
+        editRoleDTO,
+        oldRole,
+        role,
+        trx,
+      } as IRoleEditedPayload);
+
+      return role;
+    });
+  }
+}