refactoring: retrieve resources fields.

fix: issue in create a new custom view.

server/src/api/controllers/Resources.ts

@@ -1,3 +1,4 @@
+import { Service, Inject } from 'typedi';
 import { Router, Request, Response, NextFunction } from 'express';
 import {
   param,
@@ -5,20 +6,26 @@ import {
 } from 'express-validator';
 import asyncMiddleware from 'api/middleware/asyncMiddleware';
 import BaseController from './BaseController';
-import { Service } from 'typedi';
-import ResourceFieldsKeys from 'data/ResourceFieldsKeys';
+import { ServiceError } from 'exceptions';
+import ResourceService from 'services/Resource/ResourceService';
 
 @Service()
 export default class ResourceController extends BaseController{
+  @Inject()
+  resourcesService: ResourceService;
+
   /**
    * Router constructor.
    */
   router() {
     const router = Router();
 
-    router.get('/:resource_model/fields',
-      this.resourceModelParamSchema,
-      asyncMiddleware(this.resourceFields.bind(this))
+    router.get(
+      '/:resource_model/fields', [
+        ...this.resourceModelParamSchema,
+      ],
+      asyncMiddleware(this.resourceFields.bind(this)),
+      this.handleServiceErrors
     );
     return router;
   }
@@ -31,14 +38,39 @@ export default class ResourceController extends BaseController{
 
   /**
    * Retrieve resource fields of the given resource.
+   * @param {Request} req 
+   * @param {Response} res 
+   * @param {NextFunction} next 
    */
   resourceFields(req: Request, res: Response, next: NextFunction) {
+    const { tenantId } = req;
     const { resource_model: resourceModel } = req.params;
 
     try {
+      const resourceFields = this.resourcesService.getResourceFields(tenantId, resourceModel);
 
+      return res.status(200).send({
+        resource_fields: this.transfromToResponse(resourceFields),
+      });
     } catch (error) {
       next(error);
     }
   }
+
+  /**
+   * Handles service errors.
+   * @param {Error} error 
+   * @param {Request} req 
+   * @param {Response} res 
+   * @param {NextFunction} next 
+   */
+  handleServiceErrors(error: Error, req: Request, res: Response, next: NextFunction) {
+    if (error instanceof ServiceError) {
+      if (error.errorType === 'RESOURCE_MODEL_NOT_FOUND') {
+        return res.status(400).send({
+          errors: [{ type: 'RESOURCE.MODEL.NOT.FOUND', code: 100 }],
+        });
+      }
+    }
+  }
 };