feat: assets controller & serve course image

app/Controllers/Http/Api/AssetsController.ts

@@ -0,0 +1,39 @@
+import { HttpContextContract } from '@ioc:Adonis/Core/HttpContext';
+import { Exception, inject, Ioc } from '@adonisjs/core/build/standalone';
+
+/**
+ * Services
+ */
+import AssetsService from 'App/Services/AssetsService';
+
+import BaseController from '../BaseController';
+
+@inject()
+export default class AssetsController extends BaseController {
+  private assetsService: AssetsService;
+
+  constructor(assetsService: AssetsService) {
+    super();
+    this.assetsService = assetsService;
+  }
+
+  /**
+   * Send background image of course
+   * GET /media/images/courses/:fileName
+   */
+  public async serveCourseImage(ctx: HttpContextContract) {
+    const result = await this.assetsService.getCourseImagePath(ctx.params.fileName);
+
+    if (typeof result !== 'string') {
+      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);
+    }
+
+    return this.sendFile(ctx, result);
+  }
+}
+
+new Ioc().make(AssetsController);

app/Controllers/Http/BaseController.ts

@@ -12,4 +12,8 @@ export default class BaseController {
 
     return ctx.response.status(response.status).send(response);
   }
+
+  public sendFile(ctx: HttpContextContract, path: string) {
+    return ctx.response.download(path);
+  }
 }

app/Models/Image.ts

@@ -5,7 +5,7 @@ export default class Image extends BaseModel {
   @column({ isPrimary: true })
   public id: number;
 
-  @column()
+  @column({ serializeAs: null })
   public path: string;
 
   @column()

app/Repositories/CourseRepository.ts

@@ -209,9 +209,11 @@ export default class CourseRepository {
    */
   public async delete(id: string | number): Promise<Course | null> {
     const course = await this.Course.query()
-      .preload('teacher')
       .preload('category')
-      .preload('lessons')
+      .preload('image')
+      .withCount('students')
+      .withCount('likes')
+      .withCount('lessons')
       .where('id', id)
       .first();
 

app/Repositories/ImageRepository.ts

@@ -15,14 +15,26 @@ export default class ImageRepository {
     return image;
   }
 
+  public async getByFileName(name: string): Promise<Image | null> {
+    const image = await this.Image.query().where('name', name).first();
+    return image;
+  }
+
   public async getAll(): Promise<Image[]> {
     const images = await this.Image.query();
     return images;
   }
 
   public async create(file: MultipartFileContract): Promise<Image> {
-    await file.moveToDisk('./images');
-    const image = await this.Image.create({ name: file.clientName, path: file.filePath, ext: file.extname });
+    /**
+     * Save image to disk
+     */
+    await file.moveToDisk('images/courses');
+
+    /**
+     * Save image to database
+     */
+    const image = await this.Image.create({ name: file.fileName, path: file.filePath, ext: file.extname });
     return image;
   }
 
@@ -30,7 +42,14 @@ export default class ImageRepository {
     const image = await this.Image.query().where('id', id).first();
 
     if (image) {
+      /**
+       * Delete from drive
+       */
       await Drive.delete(image.path);
+
+      /**
+       * Delete from database
+       */
       await image.delete();
       return image;
     }

app/Services/AssetsService.ts

@@ -0,0 +1,47 @@
+import { inject, Ioc } from '@adonisjs/core/build/standalone';
+import Application from '@ioc:Adonis/Core/Application';
+
+/**
+ * Datatypes
+ */
+import IResponse from 'App/Datatypes/Interfaces/IResponse';
+import HttpStatusEnum from 'App/Datatypes/Enums/HttpStatusEnum';
+
+/**
+ * Reposirories
+ */
+import ImageRepository from 'App/Repositories/ImageRepository';
+
+@inject()
+export default class AssetsService {
+  private imageRepository: ImageRepository;
+
+  constructor(imageRepository: ImageRepository) {
+    this.imageRepository = imageRepository;
+  }
+
+  /**
+   *
+   * @param name Image name
+   * @returns Pathname
+   */
+  public async getCourseImagePath(name: string): Promise<IResponse | string> {
+    const image = await this.imageRepository.getByFileName(name);
+
+    if (!image) {
+      return {
+        success: false,
+        status: HttpStatusEnum.NOT_FOUND,
+        message: 'Image not found.',
+        data: {},
+        error: {
+          code: 'E_NOT_FOUND',
+        },
+      };
+    }
+
+    return Application.tmpPath(`uploads/images/courses/${image.name}`);
+  }
+}
+
+new Ioc().make(AssetsService);

routes/api.ts

@@ -2,7 +2,15 @@
 import Route from '@ioc:Adonis/Core/Route';
 
 Route.group(() => {
+  /**
+   * v1
+   */
   require('./apis/v1/index');
+
+  /**
+   * Assets routes
+   */
+  require('./apis/assets/index');
 })
   .prefix('api')
   .as('api');

routes/apis/assets/index.ts

@@ -0,0 +1,10 @@
+import Route from '@ioc:Adonis/Core/Route';
+
+Route.group(() => {
+  /**
+   * Serve background image for course
+   */
+  Route.get('/images/courses/:fileName', 'Api/AssetsController.serveCourseImage').as('serve.course.image');
+})
+  .prefix('assets')
+  .as('assets');

routes/index.ts

@@ -22,5 +22,8 @@ import Route from '@ioc:Adonis/Core/Route';
 */
 
 Route.group(() => {
+  /**
+   * Api routes
+   */
   require('./api');
 });