feat: added basic stat info

app/Controllers/Http/Api/v1/StatController.ts

@@ -0,0 +1,31 @@
+import { Exception, inject, Ioc } from '@adonisjs/core/build/standalone';
+import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext';
+import StatService from 'App/Services/StatService';
+
+import BaseController from '../../BaseController';
+
+@inject()
+export default class StatController extends BaseController {
+  private statService: StatService;
+
+  constructor(statService: StatService) {
+    super();
+    this.statService = statService;
+  }
+
+  /**
+   * Return current stat about system
+   * GET /stat
+   */
+  public async index(ctx: HttpContextContract) {
+    const result = await this.statService.fetchStatData();
+
+    if (!result.success && result.error) {
+      throw new Exception(result.message, result.status, result.error.code);
+    }
+
+    return this.sendResponse(ctx, result.data, result.message, result.status);
+  }
+}
+
+new Ioc().make(StatController);

app/Services/StatService.ts

@@ -0,0 +1,33 @@
+import { inject, Ioc } from '@adonisjs/core/build/standalone';
+import IResponse from 'App/Datatypes/Interfaces/IResponse';
+import HttpStatusEnum from 'App/Datatypes/Enums/HttpStatusEnum';
+import Database from '@ioc:Adonis/Lucid/Database';
+
+@inject()
+export default class StatService {
+  /**
+   * Get basic statistics about the system
+   *
+   * @returns Response
+   */
+  // eslint-disable-next-line class-methods-use-this
+  public async fetchStatData(): Promise<IResponse> {
+    const count = await Database.rawQuery(
+      `
+        select (select count(*) from courses) as courses_count,
+        (select count(*) from lessons) as lessons_count
+      `
+    );
+
+    return {
+      success: true,
+      status: HttpStatusEnum.OK,
+      message: 'Fetched stat.',
+      data: {
+        ...count.rows[0],
+      },
+    };
+  }
+}
+
+new Ioc().make(StatService);

routes/apis/v1/index.ts

@@ -63,6 +63,11 @@ Route.group(() => {
      *
      */
     require('./categories');
+
+    /**
+     * Stat module
+     */
+    require('./stat');
   }).middleware('auth');
 })
   .prefix('v1')

routes/apis/v1/stat.ts

@@ -0,0 +1,5 @@
+import Route from '@ioc:Adonis/Core/Route';
+
+Route.group(() => {
+  Route.get('/', 'Api/v1/StatController.index').middleware('role:admin,teacher,student').as('stat.index');
+}).prefix('stat');