Weng JinPeng
3d891d781c
- 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.
78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
const express = require('express')
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/**
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* NewsApiCompatibilityController
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*
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* Mimics the subset of NewsAPI endpoints currently consumed by the front-end.
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*/
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class NewsApiCompatibilityController {
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constructor(storageService) {
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this._storageService = storageService
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this.router = express.Router()
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this._registerRoutes()
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}
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/**
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* @returns {void}
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*/
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_registerRoutes() {
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this.router.get('/everything', this._wrap(async (request, response) => {
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const categoryKey = this._normalizeCategoryKey(request.query.q)
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const page = this._parsePositiveInteger(request.query.page, 1)
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const pageSize = this._parsePositiveInteger(request.query.pageSize, 10)
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const document = await this._storageService.getCategoryNewsPage(categoryKey, page, pageSize)
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response.json({
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status: 'ok',
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totalResults: document.total,
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articles: document.articles
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})
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}))
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this.router.get('/top-headlines', this._wrap(async (request, response) => {
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const categoryKey = this._normalizeCategoryKey(request.query.category || 'business')
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const page = this._parsePositiveInteger(request.query.page, 1)
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const pageSize = this._parsePositiveInteger(request.query.pageSize, 10)
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const document = await this._storageService.getCategoryNewsPage(categoryKey, page, pageSize)
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response.json({
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status: 'ok',
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totalResults: document.total,
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articles: document.articles
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})
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}))
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}
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/**
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* @param {unknown} value
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* @returns {string}
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*/
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_normalizeCategoryKey(value) {
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const categoryKey = String(value || 'finance').trim().toLowerCase()
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return categoryKey
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}
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/**
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* @param {unknown} value
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* @param {number} fallback
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* @returns {number}
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*/
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_parsePositiveInteger(value, fallback) {
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const parsed = Number(value)
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return Number.isInteger(parsed) && parsed > 0 ? parsed : fallback
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}
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/**
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* @param {(request: import('express').Request, response: import('express').Response) => Promise<void>} handler
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* @returns {(request: import('express').Request, response: import('express').Response, next: import('express').NextFunction) => void}
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*/
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_wrap(handler) {
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return (request, response, next) => {
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handler(request, response).catch(next)
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}
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}
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}
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module.exports = {
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NewsApiCompatibilityController
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} |