initial commit

.gitignore

+algorithm/env
+algorithm/__pycache__
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

algorithm/main.py

+import os
+from fastapi import FastAPI, File, UploadFile
+from typing import List
+from time import sleep
+
+app = FastAPI()
+
+# Ensure the uploads directory exists
+UPLOAD_DIR = "uploads"
+os.makedirs(UPLOAD_DIR, exist_ok=True)
+
+@app.post("/upload/")
+async def upload_files(files: List[UploadFile]):
+    sleep(3)
+    saved_files = []
+    
+    for file in files:
+        file_path = os.path.join(UPLOAD_DIR, file.filename)
+        
+        # Save the file
+        with open(file_path, "wb") as buffer:
+            buffer.write(await file.read())
+        
+        saved_files.append(file_path)
+
+    return {"classification": "happy"}
\ No newline at end of file

backend/.gitignore

+# compiled output
+/dist
+/node_modules
+/build
+
+# Logs
+logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# temp directory
+.temp
+.tmp
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json

backend/.prettierrc

+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}
\ No newline at end of file

backend/README.md

+<p align="center">
+  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="120" alt="Nest Logo" /></a>
+</p>
+
+[circleci-image]: https://img.shields.io/circleci/build/github/nestjs/nest/master?token=abc123def456
+[circleci-url]: https://circleci.com/gh/nestjs/nest
+
+  <p align="center">A progressive <a href="http://nodejs.org" target="_blank">Node.js</a> framework for building efficient and scalable server-side applications.</p>
+    <p align="center">
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/l/@nestjs/core.svg" alt="Package License" /></a>
+<a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/dm/@nestjs/common.svg" alt="NPM Downloads" /></a>
+<a href="https://circleci.com/gh/nestjs/nest" target="_blank"><img src="https://img.shields.io/circleci/build/github/nestjs/nest/master" alt="CircleCI" /></a>
+<a href="https://discord.gg/G7Qnnhy" target="_blank"><img src="https://img.shields.io/badge/discord-online-brightgreen.svg" alt="Discord"/></a>
+<a href="https://opencollective.com/nest#backer" target="_blank"><img src="https://opencollective.com/nest/backers/badge.svg" alt="Backers on Open Collective" /></a>
+<a href="https://opencollective.com/nest#sponsor" target="_blank"><img src="https://opencollective.com/nest/sponsors/badge.svg" alt="Sponsors on Open Collective" /></a>
+  <a href="https://paypal.me/kamilmysliwiec" target="_blank"><img src="https://img.shields.io/badge/Donate-PayPal-ff3f59.svg" alt="Donate us"/></a>
+    <a href="https://opencollective.com/nest#sponsor"  target="_blank"><img src="https://img.shields.io/badge/Support%20us-Open%20Collective-41B883.svg" alt="Support us"></a>
+  <a href="https://twitter.com/nestframework" target="_blank"><img src="https://img.shields.io/twitter/follow/nestframework.svg?style=social&label=Follow" alt="Follow us on Twitter"></a>
+</p>
+  <!--[![Backers on Open Collective](https://opencollective.com/nest/backers/badge.svg)](https://opencollective.com/nest#backer)
+  [![Sponsors on Open Collective](https://opencollective.com/nest/sponsors/badge.svg)](https://opencollective.com/nest#sponsor)-->
+
+## Description
+
+[Nest](https://github.com/nestjs/nest) framework TypeScript starter repository.
+
+## Project setup
+
+```bash
+$ npm install
+```
+
+## Compile and run the project
+
+```bash
+# development
+$ npm run start
+
+# watch mode
+$ npm run start:dev
+
+# production mode
+$ npm run start:prod
+```
+
+## Run tests
+
+```bash
+# unit tests
+$ npm run test
+
+# e2e tests
+$ npm run test:e2e
+
+# test coverage
+$ npm run test:cov
+```
+
+## Deployment
+
+When you're ready to deploy your NestJS application to production, there are some key steps you can take to ensure it runs as efficiently as possible. Check out the [deployment documentation](https://docs.nestjs.com/deployment) for more information.
+
+If you are looking for a cloud-based platform to deploy your NestJS application, check out [Mau](https://mau.nestjs.com), our official platform for deploying NestJS applications on AWS. Mau makes deployment straightforward and fast, requiring just a few simple steps:
+
+```bash
+$ npm install -g mau
+$ mau deploy
+```
+
+With Mau, you can deploy your application in just a few clicks, allowing you to focus on building features rather than managing infrastructure.
+
+## Resources
+
+Check out a few resources that may come in handy when working with NestJS:
+
+- Visit the [NestJS Documentation](https://docs.nestjs.com) to learn more about the framework.
+- For questions and support, please visit our [Discord channel](https://discord.gg/G7Qnnhy).
+- To dive deeper and get more hands-on experience, check out our official video [courses](https://courses.nestjs.com/).
+- Deploy your application to AWS with the help of [NestJS Mau](https://mau.nestjs.com) in just a few clicks.
+- Visualize your application graph and interact with the NestJS application in real-time using [NestJS Devtools](https://devtools.nestjs.com).
+- Need help with your project (part-time to full-time)? Check out our official [enterprise support](https://enterprise.nestjs.com).
+- To stay in the loop and get updates, follow us on [X](https://x.com/nestframework) and [LinkedIn](https://linkedin.com/company/nestjs).
+- Looking for a job, or have a job to offer? Check out our official [Jobs board](https://jobs.nestjs.com).
+
+## Support
+
+Nest is an MIT-licensed open source project. It can grow thanks to the sponsors and support by the amazing backers. If you'd like to join them, please [read more here](https://docs.nestjs.com/support).
+
+## Stay in touch
+
+- Author - [Kamil Myśliwiec](https://twitter.com/kammysliwiec)
+- Website - [https://nestjs.com](https://nestjs.com/)
+- Twitter - [@nestframework](https://twitter.com/nestframework)
+
+## License
+
+Nest is [MIT licensed](https://github.com/nestjs/nest/blob/master/LICENSE).

backend/eslint.config.mjs

+// @ts-check
+import eslint from '@eslint/js';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  {
+    ignores: ['eslint.config.mjs'],
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  eslintPluginPrettierRecommended,
+  {
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.jest,
+      },
+      ecmaVersion: 5,
+      sourceType: 'module',
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-floating-promises': 'warn',
+      '@typescript-eslint/no-unsafe-argument': 'warn'
+    },
+  },
+);
\ No newline at end of file

backend/nest-cli.json

+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}

backend/package.json

+{
+  "name": "backend",
+  "version": "0.0.1",
+  "description": "",
+  "author": "",
+  "private": true,
+  "license": "UNLICENSED",
+  "scripts": {
+    "build": "nest build",
+    "format": "prettier --write \"src/**/*.ts\" \"test/**/*.ts\"",
+    "start": "nest start",
+    "start:dev": "nest start --watch",
+    "start:debug": "nest start --debug --watch",
+    "start:prod": "node dist/main",
+    "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "test:cov": "jest --coverage",
+    "test:debug": "node --inspect-brk -r tsconfig-paths/register -r ts-node/register node_modules/.bin/jest --runInBand",
+    "test:e2e": "jest --config ./test/jest-e2e.json"
+  },
+  "dependencies": {
+    "@nestjs/common": "^11.0.1",
+    "@nestjs/core": "^11.0.1",
+    "@nestjs/platform-express": "^11.0.11",
+    "axios": "^1.8.4",
+    "multer": "^1.4.5-lts.1",
+    "reflect-metadata": "^0.2.2",
+    "rxjs": "^7.8.1"
+  },
+  "devDependencies": {
+    "@eslint/eslintrc": "^3.2.0",
+    "@eslint/js": "^9.18.0",
+    "@nestjs/cli": "^11.0.0",
+    "@nestjs/schematics": "^11.0.0",
+    "@nestjs/testing": "^11.0.1",
+    "@swc/cli": "^0.6.0",
+    "@swc/core": "^1.10.7",
+    "@types/express": "^5.0.0",
+    "@types/jest": "^29.5.14",
+    "@types/multer": "^1.4.12",
+    "@types/node": "^22.10.7",
+    "@types/supertest": "^6.0.2",
+    "eslint": "^9.18.0",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-plugin-prettier": "^5.2.2",
+    "globals": "^16.0.0",
+    "jest": "^29.7.0",
+    "prettier": "^3.4.2",
+    "source-map-support": "^0.5.21",
+    "supertest": "^7.0.0",
+    "ts-jest": "^29.2.5",
+    "ts-loader": "^9.5.2",
+    "ts-node": "^10.9.2",
+    "tsconfig-paths": "^4.2.0",
+    "typescript": "^5.7.3",
+    "typescript-eslint": "^8.20.0"
+  },
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "src",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
+  }
+}

backend/src/app.controller.spec.ts

+import { Test, TestingModule } from '@nestjs/testing';
+import { AppController } from './app.controller';
+import { AppService } from './app.service';
+
+describe('AppController', () => {
+  let appController: AppController;
+
+  beforeEach(async () => {
+    const app: TestingModule = await Test.createTestingModule({
+      controllers: [AppController],
+      providers: [AppService],
+    }).compile();
+
+    appController = app.get<AppController>(AppController);
+  });
+
+  describe('root', () => {
+    it('should return "Hello World!"', () => {
+      expect(appController.getHello()).toBe('You result will be here');
+    });
+  });
+});

backend/src/app.controller.ts

+import { Controller, Get } from '@nestjs/common';
+import { AppService } from './app.service';
+
+@Controller()
+export class AppController {
+  constructor(private readonly appService: AppService) {}
+
+  @Get()
+  getHello(): string {
+    return this.appService.getHello();
+  }
+}

backend/src/app.module.ts

+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { UploadController } from './upload.controller';
+import { AppService } from './app.service';
+import { UploadService } from './upload.service';
+
+@Module({
+  imports: [],
+  controllers: [AppController, UploadController],
+  providers: [AppService, UploadService],
+})
+export class AppModule {}

backend/src/app.service.ts

+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class AppService {
+  getHello(): string {
+    return 'You result will be here';
+  }
+}

backend/src/main.ts

+import { NestFactory } from '@nestjs/core';
+import { AppModule } from './app.module';
+import * as cors from 'cors';
+
+async function bootstrap() {
+  const app = await NestFactory.create(AppModule);
+  app.use(cors()); // Enable CORS
+  await app.listen(3000);
+}
+bootstrap();

backend/src/upload.controller.ts

+import { Controller, Post, UseInterceptors, UploadedFiles } from '@nestjs/common';
+import { FilesInterceptor } from '@nestjs/platform-express';
+import { diskStorage } from 'multer';
+import { extname, resolve } from 'path';
+import { UploadService } from './upload.service';
+
+@Controller('upload')
+export class UploadController {
+  constructor(private readonly uploadSrvice: UploadService) {}
+  @Post()
+  @UseInterceptors(
+    FilesInterceptor('files', 10, { // Accept multiple files with a limit of 10
+      storage: diskStorage({
+        destination: './uploads', // Save files in the "uploads" folder
+        filename: (req, file, callback) => {
+          const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9);
+          const ext = extname(file.originalname);
+          const filename = `${file.fieldname}-${uniqueSuffix}${ext}`;
+          callback(null, filename);
+        },
+      }),
+    }),
+  )
+  async uploadFiles(@UploadedFiles() files: Express.Multer.File[]) {
+    console.log('Files uploaded:', files);
+    return this.uploadSrvice.getEmotion(files);
+  }
+}

backend/src/upload.service.ts

+import { Injectable } from '@nestjs/common';
+import axios from 'axios';
+import * as FormData from 'form-data';
+import { createReadStream } from 'fs';
+
+@Injectable()
+export class UploadService {
+  async getEmotion(files: Express.Multer.File[]): Promise<object> {
+    try {
+      const formData = new FormData();
+
+      // Append each file to the form data
+      files.forEach((file) => {
+        formData.append('files', createReadStream(file.path), file.originalname);
+      });
+
+      // Send a POST request with files
+      const response = await axios.post('http://127.0.0.1:8000/upload/', formData, {
+        headers: {
+          ...formData.getHeaders(),
+        },
+      });
+
+      return this.as_json(response.data.classification);
+    } catch (error) {
+      throw new Error(`Error calling Python API: ${error.message}`);
+    }
+  }
+
+  private as_json(classification: string): object {
+    return { classification };
+  }
+}

backend/test/jest-e2e.json

+{
+  "moduleFileExtensions": ["js", "json", "ts"],
+  "rootDir": ".",
+  "testEnvironment": "node",
+  "testRegex": ".e2e-spec.ts$",
+  "transform": {
+    "^.+\\.(t|j)s$": "ts-jest"
+  }
+}

backend/tsconfig.build.json

+{
+  "extends": "./tsconfig.json",
+  "exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
+}

backend/tsconfig.json

+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "declaration": true,
+    "removeComments": true,
+    "emitDecoratorMetadata": true,
+    "experimentalDecorators": true,
+    "allowSyntheticDefaultImports": true,
+    "target": "ES2023",
+    "sourceMap": true,
+    "outDir": "./dist",
+    "baseUrl": "./",
+    "incremental": true,
+    "skipLibCheck": true,
+    "strictNullChecks": true,
+    "forceConsistentCasingInFileNames": true,
+    "noImplicitAny": false,
+    "strictBindCallApply": false,
+    "noFallthroughCasesInSwitch": false
+  }
+}

package-lock.json

+{
+  "name": "my_app",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "devDependencies": {
+        "@nestjs/testing": "^11.0.11"
+      }
+    },
+    "node_modules/@lukeed/csprng": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@lukeed/csprng/-/csprng-1.1.0.tgz",
+      "integrity": "sha512-Z7C/xXCiGWsg0KuKsHTKJxbWhpI3Vs5GwLfOean7MGyVFGqdRgBbAjOCh6u4bbjPc/8MJ2pZmK/0DLdCbivLDA==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/@nestjs/common": {
+      "version": "11.0.11",
+      "resolved": "https://registry.npmjs.org/@nestjs/common/-/common-11.0.11.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "iterare": "1.2.1",
+        "tslib": "2.8.1",
+        "uid": "2.0.2"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/nest"
+      },
+      "peerDependencies": {
+        "class-transformer": "*",
+        "class-validator": "*",
+        "reflect-metadata": "^0.1.12 || ^0.2.0",
+        "rxjs": "^7.1.0"
+      },
+      "peerDependenciesMeta": {
+        "class-transformer": {
+          "optional": true
+        },
+        "class-validator": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@nestjs/core": {
+      "version": "11.0.11",
+      "resolved": "https://registry.npmjs.org/@nestjs/core/-/core-11.0.11.tgz",
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+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "@nuxt/opencollective": "0.4.1",
+        "fast-safe-stringify": "2.1.1",
+        "iterare": "1.2.1",
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+        "tslib": "2.8.1",
+        "uid": "2.0.2"
+      },
+      "engines": {
+        "node": ">= 20"
+      },
+      "funding": {
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+        "url": "https://opencollective.com/nest"
+      },
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+        "@nestjs/common": "^11.0.0",
+        "@nestjs/microservices": "^11.0.0",
+        "@nestjs/platform-express": "^11.0.0",
+        "@nestjs/websockets": "^11.0.0",
+        "reflect-metadata": "^0.1.12 || ^0.2.0",
+        "rxjs": "^7.1.0"
+      },
+      "peerDependenciesMeta": {
+        "@nestjs/microservices": {
+          "optional": true
+        },
+        "@nestjs/platform-express": {
+          "optional": true
+        },
+        "@nestjs/websockets": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@nestjs/testing": {
+      "version": "11.0.11",
+      "resolved": "https://registry.npmjs.org/@nestjs/testing/-/testing-11.0.11.tgz",
+      "integrity": "sha512-SoMIrhRpElV53btmGnEwpIQmXn2Xcztb9ae3lv+eVVnPHQuyB2zlgDIQVNjicbj7+3jdycX52KctOoj2eXEo1Q==",
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+      "license": "MIT",
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+      },
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+        "url": "https://opencollective.com/nest"
+      },
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+        "@nestjs/microservices": "^11.0.0",
+        "@nestjs/platform-express": "^11.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@nestjs/microservices": {
+          "optional": true
+        },
+        "@nestjs/platform-express": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@nuxt/opencollective": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/@nuxt/opencollective/-/opencollective-0.4.1.tgz",
+      "integrity": "sha512-GXD3wy50qYbxCJ652bDrDzgMr3NFEkIS374+IgFQKkCvk9yiYcLvX2XDYr7UyQxf4wK0e+yqDYRubZ0DtOxnmQ==",
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+      "license": "MIT",
+      "peer": true,
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+      },
+      "bin": {
+        "opencollective": "bin/opencollective.js"
+      },
+      "engines": {
+        "node": "^14.18.0 || >=16.10.0",
+        "npm": ">=5.10.0"
+      }
+    },
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+      "resolved": "https://registry.npmjs.org/consola/-/consola-3.4.0.tgz",
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+      "dev": true,
+      "license": "MIT",
+      "peer": true,
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