feat: initialize news service with core functionality
- Add package.json for project configuration and dependencies. - Implement NewsApplication class to manage service lifecycle and HTTP pipeline. - Create CategoryCatalog for managing news categories. - Introduce ServiceConfig for environment variable management. - Load environment variables from .env files. - Develop NewsApiCompatibilityController to mimic NewsAPI endpoints. - Create NewsController for querying and refreshing news data. - Establish AbstractJsonRepository for JSON storage operations. - Implement main entry point in index.js to bootstrap the application. - Create CategoryNewsRepository for category-specific news storage. - Add ConsoleLogger for structured logging. - Implement NewsApiClient for fetching articles from NewsAPI. - Develop NewsRefreshScheduler for scheduling news refresh tasks. - Create NewsStorageService to coordinate news data management.
This commit is contained in:
7
.dockerignore
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7
.dockerignore
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node_modules
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npm-debug.log
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.env
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data/*.json
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!data/.gitkeep
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.git
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.DS_Store
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.env.example
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.env.example
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PORT=3100
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NEWS_API_KEY=03f614876f0645948cb9bbce1661f4b2
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NEWS_API_BASE_URL=https://newsapi.org/v2/everything
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NEWS_API_LANGUAGE=ko
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NEWS_PAGE_SIZE=20
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NEWS_REFRESH_CRON=0 * * * *
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DATA_DIR=./data
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4
.gitignore
vendored
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4
.gitignore
vendored
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node_modules/
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.env
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data/*.json
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!data/.gitkeep
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Dockerfile
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Dockerfile
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FROM node:20-alpine
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WORKDIR /app
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COPY package.json package-lock.json* ./
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RUN npm install --omit=dev
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COPY . ./
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RUN mkdir -p /app/data
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EXPOSE 3100
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CMD ["npm", "start"]
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130
README.md
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130
README.md
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# News Service
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独立新闻微服务，负责周期性从 NewsAPI 拉取新闻并落盘为 JSON 文件，再通过 HTTP 接口提供给前端。
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## 功能
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- 每小时自动刷新一次新闻数据
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- 启动时自动预热数据
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- 使用 JSON 文件作为存储，每个分类一个文件
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- 提供按分类查询、全部分类查询、手动刷新接口
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- 支持 Docker 和 Docker Compose 部署
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## 分类
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- finance
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- business
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- technology
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- market
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## 目录
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```text
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news_service/
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data/
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finance.json
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business.json
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technology.json
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market.json
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src/
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app/
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config/
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controllers/
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core/
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repositories/
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services/
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```
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## 本地启动
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1. 配置环境变量
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|
```bash
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# 可直接修改 .env.example，服务会自动读取
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# 或者复制一份 .env 覆盖默认配置
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|
cp .env.example .env
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|
```
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|
2. 安装依赖
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|
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|
```bash
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|
npm install
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|
```
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|
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|
3. 启动服务
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|
```bash
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|
npm start
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|
```
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|
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|
默认地址：`http://localhost:3100`
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|
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|
## 接口
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|
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|
### 健康检查
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|
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|
```http
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|
GET /health
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|
```
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|
|
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|
### 获取分类列表
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|
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||||||
|
```http
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|
GET /api/news/categories
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|
```
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|
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|
### 获取指定分类新闻
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|
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||||||
|
```http
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|
GET /api/news?category=finance&limit=10
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|
GET /api/news/finance?limit=10
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|
```
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|
|
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|
### 兼容前端现有 NewsAPI 调用
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|
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||||||
|
```http
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|
GET /v2/everything?q=finance&language=ko&pageSize=10&page=1
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|
GET /v2/top-headlines?category=business&country=ko&pageSize=10
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|
```
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||||||
|
|
||||||
|
返回结构与前端当前使用的 NewsAPI 结构保持一致：
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|
|
||||||
|
```json
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||||||
|
{
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||||||
|
"status": "ok",
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|
"totalResults": 10,
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|
"articles": []
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|
}
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||||||
|
```
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|
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|
### 获取全部分类新闻
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|
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||||||
|
```http
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|
GET /api/news/all?limit=10
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|
```
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|
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||||||
|
### 手动刷新
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|
|
||||||
|
```http
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|
POST /api/news/refresh
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|
POST /api/news/refresh?category=finance
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|
```
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||||||
|
|
||||||
|
## Docker
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||||||
|
|
||||||
|
```bash
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||||||
|
docker compose up -d --build
|
||||||
|
```
|
||||||
|
|
||||||
|
如果前端和新闻服务需要一起对外提供访问，建议在项目根目录使用组合编排：
|
||||||
|
|
||||||
|
```bash
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||||||
|
cd /Users/wjp/Projects/juYou
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||||||
|
docker compose -f docker-compose.news-stack.yml up -d --build
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||||||
|
```
|
||||||
|
|
||||||
|
这样前端容器中的 Nginx 会把同源路径 `/newsapi/*` 代理到容器网络中的 `news-service:3100`，浏览器不会直接访问 NewsAPI，因此不会触发跨域限制。
|
||||||
|
|
||||||
|
## 前端接入建议
|
||||||
|
|
||||||
|
前端如果继续使用原来的 `/newsapi/v2/*` 请求方式，只需要把代理目标指向本服务即可，不需要修改新闻请求代码。
|
||||||
21
docker-compose.yml
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21
docker-compose.yml
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@@ -0,0 +1,21 @@
|
|||||||
|
version: '3.9'
|
||||||
|
|
||||||
|
services:
|
||||||
|
news-service:
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||||||
|
build: .
|
||||||
|
container_name: news-service
|
||||||
|
env_file:
|
||||||
|
- .env.example
|
||||||
|
ports:
|
||||||
|
- "3100:3100"
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||||||
|
environment:
|
||||||
|
PORT: 3100
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||||||
|
NEWS_API_KEY: ${NEWS_API_KEY}
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||||||
|
NEWS_API_BASE_URL: ${NEWS_API_BASE_URL:-https://newsapi.org/v2/everything}
|
||||||
|
NEWS_API_LANGUAGE: ${NEWS_API_LANGUAGE:-en}
|
||||||
|
NEWS_PAGE_SIZE: ${NEWS_PAGE_SIZE:-20}
|
||||||
|
NEWS_REFRESH_CRON: ${NEWS_REFRESH_CRON:-0 * * * *}
|
||||||
|
DATA_DIR: ${DATA_DIR:-/app/data}
|
||||||
|
volumes:
|
||||||
|
- ./data:/app/data
|
||||||
|
restart: unless-stopped
|
||||||
855
package-lock.json
generated
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855
package-lock.json
generated
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@@ -0,0 +1,855 @@
|
|||||||
|
{
|
||||||
|
"name": "news-service",
|
||||||
|
"version": "1.0.0",
|
||||||
|
"lockfileVersion": 3,
|
||||||
|
"requires": true,
|
||||||
|
"packages": {
|
||||||
|
"": {
|
||||||
|
"name": "news-service",
|
||||||
|
"version": "1.0.0",
|
||||||
|
"dependencies": {
|
||||||
|
"express": "^4.21.2",
|
||||||
|
"node-cron": "^4.2.1"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">=20.0.0"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/accepts": {
|
||||||
|
"version": "1.3.8",
|
||||||
|
"resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
|
||||||
|
"integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"mime-types": "~2.1.34",
|
||||||
|
"negotiator": "0.6.3"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.6"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/array-flatten": {
|
||||||
|
"version": "1.1.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
|
||||||
|
"integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
|
||||||
|
"license": "MIT"
|
||||||
|
},
|
||||||
|
"node_modules/body-parser": {
|
||||||
|
"version": "1.20.5",
|
||||||
|
"resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.5.tgz",
|
||||||
|
"integrity": "sha512-3grm+/2tUOvu2cjJkvsIxrv/wVpfXQW4PsQHYm7yk4vfpu7Ekl6nEsYBoJUL6qDwZUx8wUhQ8tR2qz+ad9c9OA==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"bytes": "~3.1.2",
|
||||||
|
"content-type": "~1.0.5",
|
||||||
|
"debug": "2.6.9",
|
||||||
|
"depd": "2.0.0",
|
||||||
|
"destroy": "~1.2.0",
|
||||||
|
"http-errors": "~2.0.1",
|
||||||
|
"iconv-lite": "~0.4.24",
|
||||||
|
"on-finished": "~2.4.1",
|
||||||
|
"qs": "~6.15.1",
|
||||||
|
"raw-body": "~2.5.3",
|
||||||
|
"type-is": "~1.6.18",
|
||||||
|
"unpipe": "~1.0.0"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.8",
|
||||||
|
"npm": "1.2.8000 || >= 1.4.16"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/body-parser/node_modules/qs": {
|
||||||
|
"version": "6.15.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/qs/-/qs-6.15.1.tgz",
|
||||||
|
"integrity": "sha512-6YHEFRL9mfgcAvql/XhwTvf5jKcOiiupt2FiJxHkiX1z4j7WL8J/jRHYLluORvc1XxB5rV20KoeK00gVJamspg==",
|
||||||
|
"license": "BSD-3-Clause",
|
||||||
|
"dependencies": {
|
||||||
|
"side-channel": "^1.1.0"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">=0.6"
|
||||||
|
},
|
||||||
|
"funding": {
|
||||||
|
"url": "https://github.com/sponsors/ljharb"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/bytes": {
|
||||||
|
"version": "3.1.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
|
||||||
|
"integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.8"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/call-bind-apply-helpers": {
|
||||||
|
"version": "1.0.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/call-bind-apply-helpers/-/call-bind-apply-helpers-1.0.2.tgz",
|
||||||
|
"integrity": "sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"es-errors": "^1.3.0",
|
||||||
|
"function-bind": "^1.1.2"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.4"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/call-bound": {
|
||||||
|
"version": "1.0.4",
|
||||||
|
"resolved": "https://registry.npmjs.org/call-bound/-/call-bound-1.0.4.tgz",
|
||||||
|
"integrity": "sha512-+ys997U96po4Kx/ABpBCqhA9EuxJaQWDQg7295H4hBphv3IZg0boBKuwYpt4YXp6MZ5AmZQnU/tyMTlRpaSejg==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"call-bind-apply-helpers": "^1.0.2",
|
||||||
|
"get-intrinsic": "^1.3.0"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.4"
|
||||||
|
},
|
||||||
|
"funding": {
|
||||||
|
"url": "https://github.com/sponsors/ljharb"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/content-disposition": {
|
||||||
|
"version": "0.5.4",
|
||||||
|
"resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
|
||||||
|
"integrity": "sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"safe-buffer": "5.2.1"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.6"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/content-type": {
|
||||||
|
"version": "1.0.5",
|
||||||
|
"resolved": "https://registry.npmjs.org/content-type/-/content-type-1.0.5.tgz",
|
||||||
|
"integrity": "sha512-nTjqfcBFEipKdXCv4YDQWCfmcLZKm81ldF0pAopTvyrFGVbcR6P/VAAd5G7N+0tTr8QqiU0tFadD6FK4NtJwOA==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.6"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/cookie": {
|
||||||
|
"version": "0.7.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
|
||||||
|
"integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.6"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/cookie-signature": {
|
||||||
|
"version": "1.0.7",
|
||||||
|
"resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.7.tgz",
|
||||||
|
"integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA==",
|
||||||
|
"license": "MIT"
|
||||||
|
},
|
||||||
|
"node_modules/debug": {
|
||||||
|
"version": "2.6.9",
|
||||||
|
"resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
|
||||||
|
"integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"ms": "2.0.0"
|
||||||
|
}
|
||||||
|
},
|
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|
}
|
||||||
|
},
|
||||||
|
"node_modules/side-channel-map": {
|
||||||
|
"version": "1.0.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/side-channel-map/-/side-channel-map-1.0.1.tgz",
|
||||||
|
"integrity": "sha512-VCjCNfgMsby3tTdo02nbjtM/ewra6jPHmpThenkTYh8pG9ucZ/1P8So4u4FGBek/BjpOVsDCMoLA/iuBKIFXRA==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"call-bound": "^1.0.2",
|
||||||
|
"es-errors": "^1.3.0",
|
||||||
|
"get-intrinsic": "^1.2.5",
|
||||||
|
"object-inspect": "^1.13.3"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.4"
|
||||||
|
},
|
||||||
|
"funding": {
|
||||||
|
"url": "https://github.com/sponsors/ljharb"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/side-channel-weakmap": {
|
||||||
|
"version": "1.0.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/side-channel-weakmap/-/side-channel-weakmap-1.0.2.tgz",
|
||||||
|
"integrity": "sha512-WPS/HvHQTYnHisLo9McqBHOJk2FkHO/tlpvldyrnem4aeQp4hai3gythswg6p01oSoTl58rcpiFAjF2br2Ak2A==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"call-bound": "^1.0.2",
|
||||||
|
"es-errors": "^1.3.0",
|
||||||
|
"get-intrinsic": "^1.2.5",
|
||||||
|
"object-inspect": "^1.13.3",
|
||||||
|
"side-channel-map": "^1.0.1"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.4"
|
||||||
|
},
|
||||||
|
"funding": {
|
||||||
|
"url": "https://github.com/sponsors/ljharb"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/statuses": {
|
||||||
|
"version": "2.0.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
|
||||||
|
"integrity": "sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.8"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/toidentifier": {
|
||||||
|
"version": "1.0.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
|
||||||
|
"integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">=0.6"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/type-is": {
|
||||||
|
"version": "1.6.18",
|
||||||
|
"resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
|
||||||
|
"integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
|
||||||
|
"license": "MIT",
|
||||||
|
"dependencies": {
|
||||||
|
"media-typer": "0.3.0",
|
||||||
|
"mime-types": "~2.1.24"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.6"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/unpipe": {
|
||||||
|
"version": "1.0.0",
|
||||||
|
"resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
|
||||||
|
"integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.8"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/utils-merge": {
|
||||||
|
"version": "1.0.1",
|
||||||
|
"resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
|
||||||
|
"integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.4.0"
|
||||||
|
}
|
||||||
|
},
|
||||||
|
"node_modules/vary": {
|
||||||
|
"version": "1.1.2",
|
||||||
|
"resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
|
||||||
|
"integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
|
||||||
|
"license": "MIT",
|
||||||
|
"engines": {
|
||||||
|
"node": ">= 0.8"
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
18
package.json
Normal file
18
package.json
Normal file
@@ -0,0 +1,18 @@
|
|||||||
|
{
|
||||||
|
"name": "news-service",
|
||||||
|
"version": "1.0.0",
|
||||||
|
"description": "Standalone news microservice with scheduled sync and JSON storage",
|
||||||
|
"type": "commonjs",
|
||||||
|
"main": "src/index.js",
|
||||||
|
"scripts": {
|
||||||
|
"start": "node src/index.js",
|
||||||
|
"dev": "node --watch src/index.js"
|
||||||
|
},
|
||||||
|
"engines": {
|
||||||
|
"node": ">=20.0.0"
|
||||||
|
},
|
||||||
|
"dependencies": {
|
||||||
|
"express": "^4.21.2",
|
||||||
|
"node-cron": "^4.2.1"
|
||||||
|
}
|
||||||
|
}
|
||||||
98
src/app/NewsApplication.js
Normal file
98
src/app/NewsApplication.js
Normal file
@@ -0,0 +1,98 @@
|
|||||||
|
const express = require('express')
|
||||||
|
const { CategoryNewsRepository } = require('../repositories/CategoryNewsRepository')
|
||||||
|
const { NewsApiClient } = require('../services/NewsApiClient')
|
||||||
|
const { NewsStorageService } = require('../services/NewsStorageService')
|
||||||
|
const { NewsRefreshScheduler } = require('../services/NewsRefreshScheduler')
|
||||||
|
const { NewsController } = require('../controllers/NewsController')
|
||||||
|
const { NewsApiCompatibilityController } = require('../controllers/NewsApiCompatibilityController')
|
||||||
|
const { NewsCategoryCatalog } = require('../config/CategoryCatalog')
|
||||||
|
const { ConsoleLogger } = require('../services/ConsoleLogger')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* NewsApplication
|
||||||
|
*
|
||||||
|
* Composes the service graph, configures Express, and manages lifecycle.
|
||||||
|
*/
|
||||||
|
class NewsApplication {
|
||||||
|
constructor(runtimeConfig) {
|
||||||
|
this._runtimeConfig = runtimeConfig
|
||||||
|
this._logger = new ConsoleLogger()
|
||||||
|
this._categoryCatalog = new NewsCategoryCatalog()
|
||||||
|
this._repository = new CategoryNewsRepository(runtimeConfig.dataDirectory)
|
||||||
|
this._apiClient = new NewsApiClient(
|
||||||
|
runtimeConfig.apiBaseUrl,
|
||||||
|
runtimeConfig.apiKey,
|
||||||
|
runtimeConfig.language,
|
||||||
|
runtimeConfig.pageSize
|
||||||
|
)
|
||||||
|
this._storageService = new NewsStorageService(this._categoryCatalog, this._repository, this._apiClient)
|
||||||
|
this._scheduler = new NewsRefreshScheduler(this._storageService, runtimeConfig.refreshCron, this._logger)
|
||||||
|
this._express = express()
|
||||||
|
this._server = null
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async start() {
|
||||||
|
this._configureHttpPipeline()
|
||||||
|
await this._scheduler.start()
|
||||||
|
await new Promise((resolve) => {
|
||||||
|
this._server = this._express.listen(this._runtimeConfig.port, () => {
|
||||||
|
this._logger.info('News service started', { port: this._runtimeConfig.port })
|
||||||
|
resolve()
|
||||||
|
})
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async stop() {
|
||||||
|
this._scheduler.stop()
|
||||||
|
if (!this._server) {
|
||||||
|
return
|
||||||
|
}
|
||||||
|
await new Promise((resolve, reject) => {
|
||||||
|
this._server.close((error) => {
|
||||||
|
if (error) {
|
||||||
|
reject(error)
|
||||||
|
return
|
||||||
|
}
|
||||||
|
resolve()
|
||||||
|
})
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
_configureHttpPipeline() {
|
||||||
|
this._express.use(express.json())
|
||||||
|
|
||||||
|
this._express.get('/health', (_request, response) => {
|
||||||
|
response.json({
|
||||||
|
status: 'ok',
|
||||||
|
service: 'news-service',
|
||||||
|
timestamp: new Date().toISOString()
|
||||||
|
})
|
||||||
|
})
|
||||||
|
|
||||||
|
const newsController = new NewsController(this._storageService)
|
||||||
|
const newsApiCompatibilityController = new NewsApiCompatibilityController(this._storageService)
|
||||||
|
this._express.use('/api/news', newsController.router)
|
||||||
|
this._express.use('/v2', newsApiCompatibilityController.router)
|
||||||
|
|
||||||
|
this._express.use((error, _request, response, _next) => {
|
||||||
|
this._logger.error('Request processing failed', error)
|
||||||
|
response.status(500).json({
|
||||||
|
status: 'error',
|
||||||
|
message: error.message || 'Internal server error'
|
||||||
|
})
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsApplication
|
||||||
|
}
|
||||||
55
src/config/CategoryCatalog.js
Normal file
55
src/config/CategoryCatalog.js
Normal file
@@ -0,0 +1,55 @@
|
|||||||
|
/**
|
||||||
|
* NewsCategory
|
||||||
|
*
|
||||||
|
* Immutable category model used across the application.
|
||||||
|
*/
|
||||||
|
class NewsCategory {
|
||||||
|
/**
|
||||||
|
* @param {string} key
|
||||||
|
* @param {string} query
|
||||||
|
* @param {string} fileName
|
||||||
|
* @param {string} label
|
||||||
|
*/
|
||||||
|
constructor(key, query, fileName, label) {
|
||||||
|
this.key = key
|
||||||
|
this.query = query
|
||||||
|
this.fileName = fileName
|
||||||
|
this.label = label
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* NewsCategoryCatalog
|
||||||
|
*
|
||||||
|
* Encapsulates all supported news categories and lookup behavior.
|
||||||
|
*/
|
||||||
|
class NewsCategoryCatalog {
|
||||||
|
constructor() {
|
||||||
|
this._categories = [
|
||||||
|
new NewsCategory('finance', 'finance', 'finance.json', 'Finance'),
|
||||||
|
new NewsCategory('business', 'business', 'business.json', 'Business'),
|
||||||
|
new NewsCategory('technology', 'technology', 'technology.json', 'Technology'),
|
||||||
|
new NewsCategory('market', 'market', 'market.json', 'Market')
|
||||||
|
]
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {NewsCategory[]}
|
||||||
|
*/
|
||||||
|
all() {
|
||||||
|
return [...this._categories]
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} key
|
||||||
|
* @returns {NewsCategory | null}
|
||||||
|
*/
|
||||||
|
getByKey(key) {
|
||||||
|
return this._categories.find((item) => item.key === key) || null
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsCategory,
|
||||||
|
NewsCategoryCatalog
|
||||||
|
}
|
||||||
31
src/config/ServiceConfig.js
Normal file
31
src/config/ServiceConfig.js
Normal file
@@ -0,0 +1,31 @@
|
|||||||
|
const path = require('path')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* ServiceConfig
|
||||||
|
*
|
||||||
|
* Centralizes environment parsing and default values.
|
||||||
|
*/
|
||||||
|
class ServiceConfig {
|
||||||
|
constructor(env = process.env) {
|
||||||
|
this._env = env
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {{port: number, apiKey: string, apiBaseUrl: string, language: string, pageSize: number, refreshCron: string, dataDirectory: string}}
|
||||||
|
*/
|
||||||
|
toRuntimeConfig() {
|
||||||
|
return {
|
||||||
|
port: Number(this._env.PORT || 3100),
|
||||||
|
apiKey: this._env.NEWS_API_KEY || '',
|
||||||
|
apiBaseUrl: this._env.NEWS_API_BASE_URL || 'https://newsapi.org/v2/everything',
|
||||||
|
language: this._env.NEWS_API_LANGUAGE || 'en',
|
||||||
|
pageSize: Number(this._env.NEWS_PAGE_SIZE || 20),
|
||||||
|
refreshCron: this._env.NEWS_REFRESH_CRON || '0 * * * *',
|
||||||
|
dataDirectory: path.resolve(process.cwd(), this._env.DATA_DIR || './data')
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
ServiceConfig
|
||||||
|
}
|
||||||
42
src/config/loadEnvironmentFiles.js
Normal file
42
src/config/loadEnvironmentFiles.js
Normal file
@@ -0,0 +1,42 @@
|
|||||||
|
const fs = require('fs')
|
||||||
|
const path = require('path')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Loads environment variables from local files without requiring extra dependencies.
|
||||||
|
* Priority: .env, then .env.example for any keys that are still unset.
|
||||||
|
*
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
function loadEnvironmentFiles() {
|
||||||
|
const candidateFiles = ['.env', '.env.example']
|
||||||
|
|
||||||
|
for (const fileName of candidateFiles) {
|
||||||
|
const filePath = path.resolve(process.cwd(), fileName)
|
||||||
|
if (!fs.existsSync(filePath)) {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
const lines = fs.readFileSync(filePath, 'utf8').split(/\r?\n/)
|
||||||
|
for (const rawLine of lines) {
|
||||||
|
const line = rawLine.trim()
|
||||||
|
if (!line || line.startsWith('#')) {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
const separatorIndex = line.indexOf('=')
|
||||||
|
if (separatorIndex === -1) {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
|
||||||
|
const key = line.slice(0, separatorIndex).trim()
|
||||||
|
const value = line.slice(separatorIndex + 1).trim().replace(/^['"]|['"]$/g, '')
|
||||||
|
if (!(key in process.env)) {
|
||||||
|
process.env[key] = value
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
loadEnvironmentFiles
|
||||||
|
}
|
||||||
78
src/controllers/NewsApiCompatibilityController.js
Normal file
78
src/controllers/NewsApiCompatibilityController.js
Normal file
@@ -0,0 +1,78 @@
|
|||||||
|
const express = require('express')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* NewsApiCompatibilityController
|
||||||
|
*
|
||||||
|
* Mimics the subset of NewsAPI endpoints currently consumed by the front-end.
|
||||||
|
*/
|
||||||
|
class NewsApiCompatibilityController {
|
||||||
|
constructor(storageService) {
|
||||||
|
this._storageService = storageService
|
||||||
|
this.router = express.Router()
|
||||||
|
this._registerRoutes()
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
_registerRoutes() {
|
||||||
|
this.router.get('/everything', this._wrap(async (request, response) => {
|
||||||
|
const categoryKey = this._normalizeCategoryKey(request.query.q)
|
||||||
|
const page = this._parsePositiveInteger(request.query.page, 1)
|
||||||
|
const pageSize = this._parsePositiveInteger(request.query.pageSize, 10)
|
||||||
|
const document = await this._storageService.getCategoryNewsPage(categoryKey, page, pageSize)
|
||||||
|
|
||||||
|
response.json({
|
||||||
|
status: 'ok',
|
||||||
|
totalResults: document.total,
|
||||||
|
articles: document.articles
|
||||||
|
})
|
||||||
|
}))
|
||||||
|
|
||||||
|
this.router.get('/top-headlines', this._wrap(async (request, response) => {
|
||||||
|
const categoryKey = this._normalizeCategoryKey(request.query.category || 'business')
|
||||||
|
const page = this._parsePositiveInteger(request.query.page, 1)
|
||||||
|
const pageSize = this._parsePositiveInteger(request.query.pageSize, 10)
|
||||||
|
const document = await this._storageService.getCategoryNewsPage(categoryKey, page, pageSize)
|
||||||
|
|
||||||
|
response.json({
|
||||||
|
status: 'ok',
|
||||||
|
totalResults: document.total,
|
||||||
|
articles: document.articles
|
||||||
|
})
|
||||||
|
}))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {unknown} value
|
||||||
|
* @returns {string}
|
||||||
|
*/
|
||||||
|
_normalizeCategoryKey(value) {
|
||||||
|
const categoryKey = String(value || 'finance').trim().toLowerCase()
|
||||||
|
return categoryKey
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {unknown} value
|
||||||
|
* @param {number} fallback
|
||||||
|
* @returns {number}
|
||||||
|
*/
|
||||||
|
_parsePositiveInteger(value, fallback) {
|
||||||
|
const parsed = Number(value)
|
||||||
|
return Number.isInteger(parsed) && parsed > 0 ? parsed : fallback
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {(request: import('express').Request, response: import('express').Response) => Promise<void>} handler
|
||||||
|
* @returns {(request: import('express').Request, response: import('express').Response, next: import('express').NextFunction) => void}
|
||||||
|
*/
|
||||||
|
_wrap(handler) {
|
||||||
|
return (request, response, next) => {
|
||||||
|
handler(request, response).catch(next)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsApiCompatibilityController
|
||||||
|
}
|
||||||
77
src/controllers/NewsController.js
Normal file
77
src/controllers/NewsController.js
Normal file
@@ -0,0 +1,77 @@
|
|||||||
|
const express = require('express')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* NewsController
|
||||||
|
*
|
||||||
|
* Exposes HTTP routes for querying and refreshing cached news data.
|
||||||
|
*/
|
||||||
|
class NewsController {
|
||||||
|
constructor(storageService) {
|
||||||
|
this._storageService = storageService
|
||||||
|
this.router = express.Router()
|
||||||
|
this._registerRoutes()
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
_registerRoutes() {
|
||||||
|
this.router.get('/categories', this._wrap(async (_request, response) => {
|
||||||
|
response.json({ data: this._storageService.getCategories() })
|
||||||
|
}))
|
||||||
|
|
||||||
|
this.router.get('/all', this._wrap(async (request, response) => {
|
||||||
|
const limit = this._parseLimit(request.query.limit)
|
||||||
|
const data = await this._storageService.getAllNews(limit)
|
||||||
|
response.json({ data })
|
||||||
|
}))
|
||||||
|
|
||||||
|
this.router.get('/', this._wrap(async (request, response) => {
|
||||||
|
const category = request.query.category
|
||||||
|
if (!category) {
|
||||||
|
response.status(400).json({ message: 'category query parameter is required' })
|
||||||
|
return
|
||||||
|
}
|
||||||
|
const limit = this._parseLimit(request.query.limit)
|
||||||
|
const data = await this._storageService.getCategoryNews(String(category), limit)
|
||||||
|
response.json({ data })
|
||||||
|
}))
|
||||||
|
|
||||||
|
this.router.get('/:category', this._wrap(async (request, response) => {
|
||||||
|
const limit = this._parseLimit(request.query.limit)
|
||||||
|
const data = await this._storageService.getCategoryNews(request.params.category, limit)
|
||||||
|
response.json({ data })
|
||||||
|
}))
|
||||||
|
|
||||||
|
this.router.post('/refresh', this._wrap(async (request, response) => {
|
||||||
|
const category = request.query.category
|
||||||
|
const data = category
|
||||||
|
? await this._storageService.refreshCategory(String(category))
|
||||||
|
: await this._storageService.refreshAll()
|
||||||
|
response.json({ data })
|
||||||
|
}))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string | undefined} limitValue
|
||||||
|
* @returns {number}
|
||||||
|
*/
|
||||||
|
_parseLimit(limitValue) {
|
||||||
|
const parsed = Number(limitValue)
|
||||||
|
return Number.isInteger(parsed) && parsed > 0 ? parsed : 0
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {(request: import('express').Request, response: import('express').Response) => Promise<void>} handler
|
||||||
|
* @returns {(request: import('express').Request, response: import('express').Response, next: import('express').NextFunction) => void}
|
||||||
|
*/
|
||||||
|
_wrap(handler) {
|
||||||
|
return (request, response, next) => {
|
||||||
|
handler(request, response).catch(next)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsController
|
||||||
|
}
|
||||||
63
src/core/AbstractJsonRepository.js
Normal file
63
src/core/AbstractJsonRepository.js
Normal file
@@ -0,0 +1,63 @@
|
|||||||
|
const fs = require('fs/promises')
|
||||||
|
const path = require('path')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* AbstractJsonRepository
|
||||||
|
*
|
||||||
|
* Defines the storage contract for JSON-backed repositories.
|
||||||
|
*/
|
||||||
|
class AbstractJsonRepository {
|
||||||
|
constructor(dataDirectory) {
|
||||||
|
if (new.target === AbstractJsonRepository) {
|
||||||
|
throw new Error('AbstractJsonRepository cannot be instantiated directly')
|
||||||
|
}
|
||||||
|
this._dataDirectory = dataDirectory
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async ensureDirectory() {
|
||||||
|
await fs.mkdir(this._dataDirectory, { recursive: true })
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} fileName
|
||||||
|
* @returns {string}
|
||||||
|
*/
|
||||||
|
resolvePath(fileName) {
|
||||||
|
return path.join(this._dataDirectory, fileName)
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} fileName
|
||||||
|
* @param {object} payload
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async writeJson(fileName, payload) {
|
||||||
|
await this.ensureDirectory()
|
||||||
|
await fs.writeFile(this.resolvePath(fileName), JSON.stringify(payload, null, 2), 'utf8')
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} fileName
|
||||||
|
* @param {object} fallback
|
||||||
|
* @returns {Promise<object>}
|
||||||
|
*/
|
||||||
|
async readJson(fileName, fallback) {
|
||||||
|
await this.ensureDirectory()
|
||||||
|
try {
|
||||||
|
const fileContent = await fs.readFile(this.resolvePath(fileName), 'utf8')
|
||||||
|
return JSON.parse(fileContent)
|
||||||
|
} catch (error) {
|
||||||
|
if (error.code === 'ENOENT') {
|
||||||
|
return fallback
|
||||||
|
}
|
||||||
|
throw error
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
AbstractJsonRepository
|
||||||
|
}
|
||||||
41
src/index.js
Normal file
41
src/index.js
Normal file
@@ -0,0 +1,41 @@
|
|||||||
|
const { ServiceConfig } = require('./config/ServiceConfig')
|
||||||
|
const { loadEnvironmentFiles } = require('./config/loadEnvironmentFiles')
|
||||||
|
const { NewsApplication } = require('./app/NewsApplication')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Bootstrap
|
||||||
|
*
|
||||||
|
* Starts the news microservice and wires process lifecycle handlers.
|
||||||
|
*/
|
||||||
|
class Bootstrap {
|
||||||
|
constructor() {
|
||||||
|
loadEnvironmentFiles()
|
||||||
|
const serviceConfig = new ServiceConfig()
|
||||||
|
this._application = new NewsApplication(serviceConfig.toRuntimeConfig())
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async run() {
|
||||||
|
await this._application.start()
|
||||||
|
this._registerShutdownHooks()
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
_registerShutdownHooks() {
|
||||||
|
const shutdown = async () => {
|
||||||
|
await this._application.stop()
|
||||||
|
process.exit(0)
|
||||||
|
}
|
||||||
|
process.on('SIGINT', shutdown)
|
||||||
|
process.on('SIGTERM', shutdown)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
new Bootstrap().run().catch((error) => {
|
||||||
|
console.error(error)
|
||||||
|
process.exit(1)
|
||||||
|
})
|
||||||
57
src/repositories/CategoryNewsRepository.js
Normal file
57
src/repositories/CategoryNewsRepository.js
Normal file
@@ -0,0 +1,57 @@
|
|||||||
|
const { AbstractJsonRepository } = require('../core/AbstractJsonRepository')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* CategoryNewsRepository
|
||||||
|
*
|
||||||
|
* Stores and retrieves articles for each category in a dedicated JSON file.
|
||||||
|
*/
|
||||||
|
class CategoryNewsRepository extends AbstractJsonRepository {
|
||||||
|
constructor(dataDirectory) {
|
||||||
|
super(dataDirectory)
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {import('../config/CategoryCatalog').NewsCategory} category
|
||||||
|
* @returns {Promise<object>}
|
||||||
|
*/
|
||||||
|
async readCategory(category) {
|
||||||
|
return this.readJson(category.fileName, this._createEmptyDocument(category))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {import('../config/CategoryCatalog').NewsCategory} category
|
||||||
|
* @param {object[]} articles
|
||||||
|
* @returns {Promise<object>}
|
||||||
|
*/
|
||||||
|
async saveCategory(category, articles) {
|
||||||
|
const document = {
|
||||||
|
category: category.key,
|
||||||
|
query: category.query,
|
||||||
|
label: category.label,
|
||||||
|
updatedAt: new Date().toISOString(),
|
||||||
|
total: articles.length,
|
||||||
|
articles
|
||||||
|
}
|
||||||
|
await this.writeJson(category.fileName, document)
|
||||||
|
return document
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {import('../config/CategoryCatalog').NewsCategory} category
|
||||||
|
* @returns {object}
|
||||||
|
*/
|
||||||
|
_createEmptyDocument(category) {
|
||||||
|
return {
|
||||||
|
category: category.key,
|
||||||
|
query: category.query,
|
||||||
|
label: category.label,
|
||||||
|
updatedAt: null,
|
||||||
|
total: 0,
|
||||||
|
articles: []
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
CategoryNewsRepository
|
||||||
|
}
|
||||||
59
src/services/ConsoleLogger.js
Normal file
59
src/services/ConsoleLogger.js
Normal file
@@ -0,0 +1,59 @@
|
|||||||
|
/**
|
||||||
|
* AbstractLogger
|
||||||
|
*
|
||||||
|
* Defines the shared logging interface for concrete loggers.
|
||||||
|
*/
|
||||||
|
class AbstractLogger {
|
||||||
|
info() {
|
||||||
|
throw new Error('info must be implemented by subclasses')
|
||||||
|
}
|
||||||
|
|
||||||
|
error() {
|
||||||
|
throw new Error('error must be implemented by subclasses')
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* ConsoleLogger
|
||||||
|
*
|
||||||
|
* Writes structured logs to stdout and stderr.
|
||||||
|
*/
|
||||||
|
class ConsoleLogger extends AbstractLogger {
|
||||||
|
/**
|
||||||
|
* @param {string} message
|
||||||
|
* @param {object} [context]
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
info(message, context = {}) {
|
||||||
|
console.log(JSON.stringify({ level: 'info', message, context, timestamp: new Date().toISOString() }))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} message
|
||||||
|
* @param {Error | object} [error]
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
error(message, error = {}) {
|
||||||
|
console.error(JSON.stringify({ level: 'error', message, error: this._normalizeError(error), timestamp: new Date().toISOString() }))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {Error | object} error
|
||||||
|
* @returns {object}
|
||||||
|
*/
|
||||||
|
_normalizeError(error) {
|
||||||
|
if (error instanceof Error) {
|
||||||
|
return {
|
||||||
|
name: error.name,
|
||||||
|
message: error.message,
|
||||||
|
stack: error.stack
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return error
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
AbstractLogger,
|
||||||
|
ConsoleLogger
|
||||||
|
}
|
||||||
69
src/services/NewsApiClient.js
Normal file
69
src/services/NewsApiClient.js
Normal file
@@ -0,0 +1,69 @@
|
|||||||
|
/**
|
||||||
|
* NewsApiClient
|
||||||
|
*
|
||||||
|
* Wraps outbound requests to NewsAPI.
|
||||||
|
*/
|
||||||
|
class NewsApiClient {
|
||||||
|
constructor(apiBaseUrl, apiKey, language, pageSize) {
|
||||||
|
this._apiBaseUrl = apiBaseUrl
|
||||||
|
this._apiKey = apiKey
|
||||||
|
this._language = language
|
||||||
|
this._pageSize = pageSize
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {import('../config/CategoryCatalog').NewsCategory} category
|
||||||
|
* @returns {Promise<object[]>}
|
||||||
|
*/
|
||||||
|
async fetchArticlesByCategory(category) {
|
||||||
|
if (!this._apiKey) {
|
||||||
|
throw new Error('NEWS_API_KEY is required')
|
||||||
|
}
|
||||||
|
|
||||||
|
const url = new URL(this._apiBaseUrl)
|
||||||
|
url.searchParams.set('q', category.query)
|
||||||
|
url.searchParams.set('language', this._language)
|
||||||
|
url.searchParams.set('pageSize', String(this._pageSize))
|
||||||
|
url.searchParams.set('page', '1')
|
||||||
|
url.searchParams.set('sortBy', 'publishedAt')
|
||||||
|
|
||||||
|
const response = await fetch(url, {
|
||||||
|
headers: {
|
||||||
|
'X-Api-Key': this._apiKey
|
||||||
|
}
|
||||||
|
})
|
||||||
|
|
||||||
|
if (!response.ok) {
|
||||||
|
const failure = await response.json().catch(() => ({}))
|
||||||
|
throw new Error(failure.message || `NewsAPI request failed with status ${response.status}`)
|
||||||
|
}
|
||||||
|
|
||||||
|
const payload = await response.json()
|
||||||
|
if (payload.status !== 'ok') {
|
||||||
|
throw new Error(payload.message || 'NewsAPI returned a non-ok payload')
|
||||||
|
}
|
||||||
|
|
||||||
|
return (payload.articles || []).map((article) => this._normalizeArticle(article))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {object} article
|
||||||
|
* @returns {object}
|
||||||
|
*/
|
||||||
|
_normalizeArticle(article) {
|
||||||
|
return {
|
||||||
|
source: article.source || null,
|
||||||
|
author: article.author || null,
|
||||||
|
title: article.title || '',
|
||||||
|
description: article.description || '',
|
||||||
|
url: article.url || '',
|
||||||
|
urlToImage: article.urlToImage || '',
|
||||||
|
publishedAt: article.publishedAt || null,
|
||||||
|
content: article.content || ''
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsApiClient
|
||||||
|
}
|
||||||
51
src/services/NewsRefreshScheduler.js
Normal file
51
src/services/NewsRefreshScheduler.js
Normal file
@@ -0,0 +1,51 @@
|
|||||||
|
const cron = require('node-cron')
|
||||||
|
|
||||||
|
/**
|
||||||
|
* NewsRefreshScheduler
|
||||||
|
*
|
||||||
|
* Owns startup refresh and hourly refresh scheduling.
|
||||||
|
*/
|
||||||
|
class NewsRefreshScheduler {
|
||||||
|
constructor(storageService, cronExpression, logger) {
|
||||||
|
this._storageService = storageService
|
||||||
|
this._cronExpression = cronExpression
|
||||||
|
this._logger = logger
|
||||||
|
this._task = null
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async start() {
|
||||||
|
await this._runRefresh('startup')
|
||||||
|
this._task = cron.schedule(this._cronExpression, async () => {
|
||||||
|
await this._runRefresh('scheduled')
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {void}
|
||||||
|
*/
|
||||||
|
stop() {
|
||||||
|
if (this._task) {
|
||||||
|
this._task.stop()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} trigger
|
||||||
|
* @returns {Promise<void>}
|
||||||
|
*/
|
||||||
|
async _runRefresh(trigger) {
|
||||||
|
try {
|
||||||
|
const results = await this._storageService.refreshAll()
|
||||||
|
this._logger.info(`News refresh completed via ${trigger}`, { categories: results.length })
|
||||||
|
} catch (error) {
|
||||||
|
this._logger.error(`News refresh failed via ${trigger}`, error)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsRefreshScheduler
|
||||||
|
}
|
||||||
124
src/services/NewsStorageService.js
Normal file
124
src/services/NewsStorageService.js
Normal file
@@ -0,0 +1,124 @@
|
|||||||
|
/**
|
||||||
|
* NewsStorageService
|
||||||
|
*
|
||||||
|
* Coordinates category validation, refresh logic, and repository access.
|
||||||
|
*/
|
||||||
|
class NewsStorageService {
|
||||||
|
constructor(categoryCatalog, repository, apiClient) {
|
||||||
|
this._categoryCatalog = categoryCatalog
|
||||||
|
this._repository = repository
|
||||||
|
this._apiClient = apiClient
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {Promise<object[]>}
|
||||||
|
*/
|
||||||
|
async refreshAll() {
|
||||||
|
const results = []
|
||||||
|
for (const category of this._categoryCatalog.all()) {
|
||||||
|
results.push(await this.refreshCategory(category.key))
|
||||||
|
}
|
||||||
|
return results
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} categoryKey
|
||||||
|
* @returns {Promise<object>}
|
||||||
|
*/
|
||||||
|
async refreshCategory(categoryKey) {
|
||||||
|
const category = this._resolveCategory(categoryKey)
|
||||||
|
const articles = await this._apiClient.fetchArticlesByCategory(category)
|
||||||
|
return this._repository.saveCategory(category, articles)
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} categoryKey
|
||||||
|
* @param {number} limit
|
||||||
|
* @returns {Promise<object>}
|
||||||
|
*/
|
||||||
|
async getCategoryNews(categoryKey, limit) {
|
||||||
|
const category = this._resolveCategory(categoryKey)
|
||||||
|
const document = await this._repository.readCategory(category)
|
||||||
|
return this._applyLimit(document, limit)
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} categoryKey
|
||||||
|
* @param {number} page
|
||||||
|
* @param {number} pageSize
|
||||||
|
* @returns {Promise<object>}
|
||||||
|
*/
|
||||||
|
async getCategoryNewsPage(categoryKey, page, pageSize) {
|
||||||
|
const category = this._resolveCategory(categoryKey)
|
||||||
|
const document = await this._repository.readCategory(category)
|
||||||
|
const safePage = Number.isInteger(page) && page > 0 ? page : 1
|
||||||
|
const safePageSize = Number.isInteger(pageSize) && pageSize > 0 ? pageSize : document.articles.length
|
||||||
|
const start = (safePage - 1) * safePageSize
|
||||||
|
const end = start + safePageSize
|
||||||
|
|
||||||
|
return {
|
||||||
|
...document,
|
||||||
|
total: document.total,
|
||||||
|
page: safePage,
|
||||||
|
pageSize: safePageSize,
|
||||||
|
articles: document.articles.slice(start, end)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {number} limit
|
||||||
|
* @returns {Promise<object[]>}
|
||||||
|
*/
|
||||||
|
async getAllNews(limit) {
|
||||||
|
const results = []
|
||||||
|
for (const category of this._categoryCatalog.all()) {
|
||||||
|
const document = await this._repository.readCategory(category)
|
||||||
|
results.push(this._applyLimit(document, limit))
|
||||||
|
}
|
||||||
|
return results
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @returns {object[]}
|
||||||
|
*/
|
||||||
|
getCategories() {
|
||||||
|
return this._categoryCatalog.all().map((category) => ({
|
||||||
|
key: category.key,
|
||||||
|
label: category.label,
|
||||||
|
query: category.query,
|
||||||
|
fileName: category.fileName
|
||||||
|
}))
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {string} categoryKey
|
||||||
|
* @returns {import('../config/CategoryCatalog').NewsCategory}
|
||||||
|
*/
|
||||||
|
_resolveCategory(categoryKey) {
|
||||||
|
const category = this._categoryCatalog.getByKey(categoryKey)
|
||||||
|
if (!category) {
|
||||||
|
throw new Error(`Unsupported category: ${categoryKey}`)
|
||||||
|
}
|
||||||
|
return category
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* @param {object} document
|
||||||
|
* @param {number} limit
|
||||||
|
* @returns {object}
|
||||||
|
*/
|
||||||
|
_applyLimit(document, limit) {
|
||||||
|
if (!limit || limit < 1) {
|
||||||
|
return document
|
||||||
|
}
|
||||||
|
return {
|
||||||
|
...document,
|
||||||
|
total: Math.min(document.total, limit),
|
||||||
|
articles: document.articles.slice(0, limit)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
module.exports = {
|
||||||
|
NewsStorageService
|
||||||
|
}
|
||||||
Reference in New Issue
Block a user