refactor(backend): refactor backend code

src/backend/.env.default

@@ -2,3 +2,4 @@ DB_PATH=./config/db.sqlite
 FE_PATH=../frontend/browser
 DOWNLOADS_PATH=./downloads
 FORMAT=mp3
+PORT=3000

src/backend/src/app.controller.spec.ts

@@ -1,6 +1,5 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { AppController } from './app.controller';
-import { AppService } from './app.service';
 
 describe('AppController', () => {
   let appController: AppController;
@@ -8,7 +7,7 @@ describe('AppController', () => {
   beforeEach(async () => {
     const app: TestingModule = await Test.createTestingModule({
       controllers: [AppController],
-      providers: [AppService],
+      providers: [],
     }).compile();
 
     appController = app.get<AppController>(AppController);

src/backend/src/app.module.ts

@@ -2,43 +2,49 @@ import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { ScheduleModule } from '@nestjs/schedule';
 import { ServeStaticModule } from '@nestjs/serve-static';
-import {ConfigModule, ConfigService} from "@nestjs/config";
-import {TypeOrmModule} from '@nestjs/typeorm';
-import {TrackEntity} from "./track/track.entity";
-import {TrackModule} from "./track/track.module";
-import {PlaylistModule} from "./playlist/playlist.module";
-import {PlaylistEntity} from "./playlist/playlist.entity";
+import { ConfigModule, ConfigService } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { TrackEntity } from './track/track.entity';
+import { TrackModule } from './track/track.module';
+import { PlaylistModule } from './playlist/playlist.module';
+import { PlaylistEntity } from './playlist/playlist.entity';
 import { resolve } from 'path';
-import {EnviromentEnum} from "./enviroment.enum";
+import { EnvironmentEnum } from './environmentEnum';
 
 @Module({
   imports: [
     ConfigModule.forRoot(),
     ScheduleModule.forRoot(),
     TypeOrmModule.forRootAsync({
-      imports:[ConfigModule],
+      imports: [ConfigModule],
       useFactory: async (configService: ConfigService) => ({
         type: 'sqlite',
-        database: resolve(__dirname, configService.get<string>(EnviromentEnum.DB_PATH)),
+        database: resolve(
+          __dirname,
+          configService.get<string>(EnvironmentEnum.DB_PATH),
+        ),
         entities: [TrackEntity, PlaylistEntity],
         synchronize: true,
       }),
-      inject: [ConfigService]
+      inject: [ConfigService],
     }),
     ServeStaticModule.forRootAsync({
-      imports:[ConfigModule],
-      useFactory: async (configService: ConfigService) => ([{
-        rootPath: resolve(__dirname, configService.get<string>(EnviromentEnum.FE_PATH)),
+      imports: [ConfigModule],
+      useFactory: async (configService: ConfigService) => [
+        {
+          rootPath: resolve(
+            __dirname,
+            configService.get<string>(EnvironmentEnum.FE_PATH),
+          ),
           exclude: ['/api/(.*)'],
-      }]),
-      inject: [ConfigService]
+        },
+      ],
+      inject: [ConfigService],
     }),
     TrackModule,
     PlaylistModule,
   ],
-  controllers: [
-    AppController,
-  ],
+  controllers: [AppController],
   providers: [],
 })
 export class AppModule {}

src/backend/src/environmentEnum.ts

@@ -1,4 +1,4 @@
-export enum EnviromentEnum {
+export enum EnvironmentEnum {
   DB_PATH = 'DB_PATH',
   FE_PATH = 'FE_PATH',
   DOWNLOADS_PATH = 'DOWNLOADS_PATH',

src/backend/src/main.ts

@@ -6,8 +6,12 @@ import { resolve } from 'path';
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
   app.setGlobalPrefix('api');
-  await app.listen(3000);
+  await app.listen(process.env.PORT || 3000);
 }
 bootstrap();
+
+if (!process.env.DOWNLOADS_PATH) {
+  throw new Error('DOWNLOADS_PATH environment variable is missing');
+}
 const folderName = resolve(__dirname, process.env.DOWNLOADS_PATH);
 !fs.existsSync(folderName) && fs.mkdirSync(folderName);

src/backend/src/shared/utils.service.ts

@@ -1,7 +1,7 @@
 import { Injectable } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { resolve } from 'path';
-import { EnviromentEnum } from '../enviroment.enum';
+import { EnvironmentEnum } from '../environmentEnum';
 
 @Injectable()
 export class UtilsService {
@@ -11,7 +11,7 @@ export class UtilsService {
     return resolve(
       __dirname,
       '..',
-      this.configService.get<string>(EnviromentEnum.DOWNLOADS_PATH),
+      this.configService.get<string>(EnvironmentEnum.DOWNLOADS_PATH),
       name,
     );
   }

src/backend/src/track/track.service.ts

@@ -12,8 +12,8 @@ import { resolve } from 'path';
 import { WebSocketGateway, WebSocketServer } from '@nestjs/websockets';
 import { Server } from 'socket.io';
 import * as ffmpeg from 'fluent-ffmpeg';
-import { EnviromentEnum } from '../enviroment.enum';
-import {UtilsService} from "../shared/utils.service";
+import { EnvironmentEnum } from '../environmentEnum';
+import { UtilsService } from '../shared/utils.service';
 
 enum WsTrackOperation {
   New = 'trackNew',
@@ -138,7 +138,7 @@ export class TrackService {
       }).on('error', (err) => reject(err));
       ffmpeg(audio)
         .outputOptions(ffmpegOptions)
-        .format(this.configService.get<string>(EnviromentEnum.FORMAT))
+        .format(this.configService.get<string>(EnvironmentEnum.FORMAT))
         .on('error', (err) => reject(err))
         .pipe(
           fs
@@ -150,7 +150,7 @@ export class TrackService {
   }
 
   getTrackFileName(track: TrackEntity): string {
-    return `${track.artist} - ${track.name.replace('/', '')}.${this.configService.get<string>(EnviromentEnum.FORMAT)}`;
+    return `${track.artist} - ${track.name.replace('/', '')}.${this.configService.get<string>(EnvironmentEnum.FORMAT)}`;
   }
 
   getFolderName(track: TrackEntity, playlist: PlaylistEntity): string {