feat: add数英网文章及项目专题 (#2204)

* add 数英网

* fix: 部分标题无法显示

* feat: add数英网文章及项目专题

* remove duplicate route

lib/routes/digitaling/article.js

@@ -0,0 +1,73 @@
+const cheerio = require('cheerio');
+const axios = require('@/utils/axios');
+
+// 分类标题
+const categoryTitle = new Map([
+    ['latest', { name: '最新文章', type: {} }],
+    ['headline', { name: '头条', type: {} }],
+    [
+        'hot',
+        {
+            name: '热文',
+            type: {
+                views: '近期热门文章',
+                collects: '近期最多收藏',
+                zan: '近期最多赞',
+            },
+        },
+    ],
+    ['choice', { name: '精选', type: {} }],
+]);
+module.exports = async (ctx) => {
+    let category = ctx.params.category || 'latest';
+    const subcate = ctx.params.subcate;
+    // 获取分类标题
+    let title = categoryTitle.get(category).name;
+    if (category === 'latest') {
+        // 获取最新文章
+        category = '';
+    }
+    let link = `https://www.digitaling.com/articles/${category}/`;
+    // 二级子分类
+    if (subcate !== undefined) {
+        link = link + `${subcate}`;
+        title = title + '/' + categoryTitle.get(category).type[subcate];
+    }
+    const res = await axios.get(link);
+    const $ = cheerio.load(res.data);
+    // 文章列表
+    const list = $('.con_list li h3')
+        .find('a')
+        .map((i, e) => $(e).attr('href'))
+        .get();
+    const out = await Promise.all(
+        list.map(async (itemUrl) => {
+            const cache = await ctx.cache.get(itemUrl);
+            // 判断缓存
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+            const res = await axios.get(itemUrl);
+            const $ = cheerio.load(res.data);
+
+            const item = {
+                title: $('.clearfix h2').text(),
+                author: $('#avatar_by')
+                    .find('a')
+                    .text(),
+                link: itemUrl,
+                description: $('#article_con').html(),
+                pubDate: new Date().toUTCString(),
+            };
+            ctx.cache.set(itemUrl, JSON.stringify(item));
+
+            return Promise.resolve(item);
+        })
+    );
+
+    ctx.state.data = {
+        title: `数英网-文章专题-${title}`,
+        link: link,
+        item: out,
+    };
+};