Possible implementation

Author: ro-abramov

.prettierrc

@@ -0,0 +1,5 @@
+{
+    "singleQuote": true,
+    "trailingComma": "all",
+    "printWidth": 120
+}

src/api/index.ts

@@ -1,13 +1,13 @@
-import { Get, Controller, Header, HttpCode } from "@nestjs/common";
+import { Get, Controller, Header, HttpCode } from '@nestjs/common';
 
 @Controller()
 export class AppController {
   constructor() {}
 
   @Get()
   @HttpCode(301)
-  @Header("Location", "https://www.webpurple.net/")
+  @Header('Location', 'https://www.webpurple.net/')
   root(): string {
-    return "Hello world!";
+    return 'Hello world!';
   }
 }

src/api/methods.ts

@@ -1,10 +1,10 @@
-import { Module } from "@nestjs/common";
-import { AppController } from "../app/app.controller";
-import { AlbumsModule } from "../modules/albums/albums.module";
+import { Module } from '@nestjs/common';
+import { AppController } from './app.controller';
+import { AlbumsModule } from '../modules/albums/albums.module';
 
 @Module({
   imports: [AlbumsModule],
   controllers: [AppController],
-  providers: []
+  providers: [],
 })
 export class AppModule {}

src/api/request.ts

@@ -1,13 +1,6 @@
-type Config = {
-  port: string | number;
-  apiVersion: string;
-  apiUrl: string;
-  serviceToken: string;
-};
-
-export const config: Config = {
+export const config = {
   port: process.env.PORT || 8080,
-  apiVersion: "5.80",
-  apiUrl: "https://api.vk.com/method",
-  serviceToken: process.env.SERVICE_TOKEN
+  apiVersion: '5.80',
+  apiUrl: 'https://api.vk.com/method',
+  serviceToken: process.env.SERVICE_TOKEN,
 };

src/app/app.controller.ts

@@ -1,6 +1,6 @@
-import { NestFactory } from "@nestjs/core";
-import { AppModule } from "./app/app.module";
-import { config } from "./config";
+import { NestFactory } from '@nestjs/core';
+import { AppModule } from 'app/app.module';
+import { config } from 'config';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);

src/app/app.module.ts

@@ -1,14 +1,16 @@
-import { Get, Controller, Param, Header } from "@nestjs/common";
-import { AlbumsService, GetPhotosType } from "./albums.service";
+import { Get, Controller, Param, Header } from '@nestjs/common';
+import { IGetPhotosParams } from './interfaces/GetPhoto';
+import { GetPhotoDto } from '../common/dto/vk/get-photo.dto';
+import { VkService } from '../common/services/vk.service';
 
-@Controller("albums")
+@Controller('albums')
 export class AlbumsController {
-  constructor(private readonly service: AlbumsService) {}
+  constructor(private readonly service: VkService) {}
 
-  @Get(":owner_id/:album_id")
-  @Header("Content-Type", "application/json")
-  @Header("Access-Control-Allow-Origin", "*")
-  getPhotos(@Param() params: GetPhotosType): Promise<JSON> {
+  @Get(':owner_id/:album_id')
+  @Header('Content-Type', 'application/json')
+  @Header('Access-Control-Allow-Origin', 'http://webpurple.com')
+  getPhotos(@Param() params: IGetPhotosParams): Promise<GetPhotoDto> {
     return this.service.getPhotos(params);
   }
 }

src/config.ts

@@ -1,10 +1,9 @@
-import { Module } from "@nestjs/common";
-import { AlbumsController } from "./albums.controller";
-import { AlbumsService } from "./albums.service";
+import { Module } from '@nestjs/common';
+import { AlbumsController } from './albums.controller';
+import { CommonModules } from '../common/common.module';
 
 @Module({
-  imports: [],
+  imports: [CommonModules],
   controllers: [AlbumsController],
-  providers: [AlbumsService]
 })
 export class AlbumsModule {}

src/main.ts

@@ -0,0 +1,4 @@
+export interface IGetPhotosParams {
+  owner_id: string;
+  album_id: string;
+}

src/modules/albums/albums.controller.ts

@@ -0,0 +1,8 @@
+import { Module } from '@nestjs/common';
+import { VkService } from './services/vk.service';
+
+@Module({
+  providers: [VkService],
+  exports: [VkService],
+})
+export class CommonModules {}

src/modules/albums/albums.module.ts

@@ -0,0 +1,26 @@
+interface PhotoSizes {
+  type: string;
+  url: string;
+  width: number;
+  height: number;
+}
+
+export interface IPhoto {
+  id: number;
+  sizes: Array<PhotoSizes>;
+  text: string;
+  date: number;
+}
+
+export class GetPhotoDto {
+  public count: number;
+  public items: Array<IPhoto>;
+  constructor(response) {
+    this.count = response.count || null;
+    this.items = response.items || [];
+  }
+
+  static of(response) {
+    return new GetPhotoDto(response);
+  }
+}

src/modules/albums/albums.service.ts

@@ -0,0 +1,28 @@
+import { Injectable } from '@nestjs/common';
+import { config } from '../../../config';
+import { GetPhotoDto } from '../dto/vk/get-photo.dto';
+import axios from 'axios';
+
+@Injectable()
+export class VkService {
+  private SERVICE_TOKEN = config.serviceToken;
+  private API_URL = config.apiUrl;
+  private API_VERSION = config.apiVersion;
+
+  public getPhotos(params: { owner_id: string; album_id: string }): Promise<GetPhotoDto> {
+    return axios
+      .get(`${this.API_URL}/photos/get`, {
+        params: {
+          ...params,
+          access_token: this.SERVICE_TOKEN,
+          v: this.API_VERSION,
+        },
+      })
+      .then(response => response.data.response)
+      .catch(e => {
+        console.error(e);
+        return null;
+      })
+      .then(GetPhotoDto.of);
+  }
+}