feat: remove path alias.

feat: remove Webpack and depend on nodemon.
feat: refactoring expenses.
feat: optimize system users with caching.
feat: architecture tenant optimize.

server/src/api/controllers/Settings.ts

@@ -0,0 +1,95 @@
+import { Router, Request, Response } from 'express';
+import { body, query, validationResult } from 'express-validator';
+import { pick } from 'lodash';
+import { IOptionDTO, IOptionsDTO } from 'interfaces';
+import BaseController from 'api/controllers/BaseController';
+import asyncMiddleware from 'api/middleware/asyncMiddleware';
+
+export default  class SettingsController extends BaseController{
+  /**
+   * Router constructor.
+   */
+  router() {
+    const router = Router();
+
+    router.post('/',
+      this.saveSettingsValidationSchema,
+      asyncMiddleware(this.saveSettings.bind(this)));
+
+    router.get('/',
+      this.getSettingsSchema,
+      asyncMiddleware(this.getSettings.bind(this)));
+
+    return router;
+  }
+
+  /**
+   * Save settings validation schema.
+   */
+  get saveSettingsValidationSchema() {
+    return [
+      body('options').isArray({ min: 1 }),
+      body('options.*.key').exists(),
+      body('options.*.value').exists(),
+      body('options.*.group').exists(),
+    ];
+  }
+
+  /**
+   * Retrieve the application options from the storage.
+   */
+  get getSettingsSchema() {
+    return [
+      query('key').optional(),
+      query('group').optional(),
+    ];
+  }
+
+  /**
+   * Saves the given options to the storage.
+   * @param {Request} req - 
+   * @param {Response} res - 
+   */
+  saveSettings(req: Request, res: Response) {
+    const { Option } = req.models;
+    const optionsDTO: IOptionsDTO = this.matchedBodyData(req);
+    const { settings } = req;
+
+    const errorReasons: { type: string, code: number, keys: [] }[] = [];
+    const notDefinedOptions = Option.validateDefined(optionsDTO.options);
+
+    if (notDefinedOptions.length) {
+      errorReasons.push({
+        type: 'OPTIONS.KEY.NOT.DEFINED',
+        code: 200,
+        keys: notDefinedOptions.map((o) => ({
+          ...pick(o, ['key', 'group'])
+        })),
+      });
+    }
+    if (errorReasons.length) {
+      return res.status(400).send({ errors: errorReasons });
+    }
+    optionsDTO.options.forEach((option: IOptionDTO) => {
+      settings.set({ ...option });
+    });
+ 
+    return res.status(200).send({ 
+      type: 'success',
+      code: 'OPTIONS.SAVED.SUCCESSFULLY',
+      message: 'Options have been saved successfully.',
+    });
+  }
+  
+  /**
+   * Retrieve settings.
+   * @param {Request} req 
+   * @param {Response} res 
+   */
+  getSettings(req: Request, res: Response) {
+    const { settings } = req;
+    const allSettings = settings.all();
+
+    return res.status(200).send({ settings: allSettings });
+  }
+};