Add demo mode

backend/src/app.module.ts

@@ -6,6 +6,7 @@ import { ImageModule } from './routes/image/imageroute.module';
 import { ServeStaticModule } from '@nestjs/serve-static';
 import Config from './env';
 import { ImageEntity } from './collections/imagedb/image.entity';
+import { DemoManagerModule } from './managers/demo/demomanager.module';
 
 @Module({
   imports: [
@@ -25,6 +26,7 @@ import { ImageEntity } from './collections/imagedb/image.entity';
     }),
     AuthModule,
     ImageModule,
+    DemoManagerModule,
   ],
 })
 export class AppModule {}

backend/src/collections/imagedb/imagedb.service.ts

@@ -4,7 +4,12 @@ import { Repository } from 'typeorm';
 import { ImageEntity } from './image.entity';
 import Crypto from 'crypto';
 import { SupportedMime } from './mimes.service';
-import { AsyncFailable, Fail, HasFailed, HasSuccess } from 'imagur-shared/dist/types';
+import {
+  AsyncFailable,
+  Fail,
+  HasFailed,
+  HasSuccess,
+} from 'imagur-shared/dist/types';
 
 @Injectable()
 export class ImageDBService {
@@ -73,6 +78,15 @@ export class ImageDBService {
     return true;
   }
 
+  public async deleteAll(): AsyncFailable<true> {
+    try {
+      await this.imageRepository.delete({});
+    } catch (e: any) {
+      return Fail(e?.message);
+    }
+    return true;
+  }
+
   private hash(image: Buffer): string {
     return Crypto.createHash('sha256').update(image).digest('hex');
   }

backend/src/env.ts

@@ -3,8 +3,10 @@ import { fileURLToPath } from 'url';
 const packageRoot = resolve(dirname(fileURLToPath(import.meta.url)), '../');
 
 const Config = {
-  host: process.env.IMAGUR_HOST || '0.0.0.0',
-  port: process.env.IMAGUR_PORT || 8080,
+  main: {
+    host: process.env.IMAGUR_HOST || '0.0.0.0',
+    port: process.env.IMAGUR_PORT || 8080,
+  },
   database: {
     host: process.env.IMAGUR_DB_HOST ?? 'localhost',
     port: process.env.IMAGUR_DB_PORT
@@ -38,6 +40,12 @@ const Config = {
       join(packageRoot, '../frontend/dist'),
     backendRoutes: ['i', 'api'],
   },
+  demo: {
+    enabled: process.env.IMAGUR_DEMO?.toLowerCase() === 'true',
+    interval: process.env.IMAGUR_DEMO_INTERVAL
+      ? parseInt(process.env.IMAGUR_DEMO_INTERVAL)
+      : 1000 * 60 * 5,
+  },
 };
 
 export default Config;

backend/src/main.ts

@@ -24,7 +24,7 @@ async function bootstrap() {
   app.useGlobalFilters(new MainExceptionFilter());
   app.useGlobalInterceptors(new SuccessInterceptor());
   app.useGlobalPipes(new ValidationPipe({ disableErrorMessages: true }));
-  await app.listen(Config.port, Config.host);
+  await app.listen(Config.main.port, Config.main.host);
 }
 
 bootstrap().catch(console.error);

backend/src/managers/demo/demomanager.module.ts

@@ -0,0 +1,20 @@
+import { Module, OnModuleInit } from '@nestjs/common';
+import { ImageDBModule } from '../../collections/imagedb/imagedb.module';
+import Config from '../../env';
+import { DemoManagerService } from './demomanager.service';
+
+@Module({
+  imports: [ImageDBModule],
+  providers: [DemoManagerService],
+})
+export class DemoManagerModule implements OnModuleInit {
+  constructor(private readonly demoManagerService: DemoManagerService) {}
+
+  private interval: NodeJS.Timeout;
+
+  onModuleInit() {
+    if (Config.demo.enabled) {
+      setInterval(this.demoManagerService.execute, Config.demo.interval);
+    }
+  }
+}

backend/src/managers/demo/demomanager.service.ts

@@ -0,0 +1,18 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { ImageDBService } from '../../collections/imagedb/imagedb.service';
+
+@Injectable()
+export class DemoManagerService {
+  private readonly logger = new Logger('DemoManagerService');
+
+  constructor(private readonly imagesService: ImageDBService) {}
+
+  private async executeAsync() {
+    this.logger.log('Executing demo cleanup');
+    await this.imagesService.deleteAll();
+  }
+
+  public execute() {
+    this.executeAsync().catch(this.logger.error);
+  }
+}