feat: 增加 Hacker News 内容 (#2253)

* 增加 Hacker News 的热门内容

* 增加 Hacker News 的分类

lib/routes/hackernews/story.js

@@ -0,0 +1,60 @@
+const axios = require('@/utils/axios');
+const cheerio = require('cheerio');
+
+const host = 'https://news.ycombinator.com';
+const paths = {
+    index: '/',
+    new: '/newest',
+    past: '/front',
+    ask: '/ask',
+    show: '/show',
+    jobs: '/jobs',
+    best: '/best',
+};
+
+module.exports = async (ctx) => {
+    const section = ctx.params.section;
+    const showStory = ctx.params.type !== 'comments';
+    const path = paths[section];
+    const url = `${host}${path}`;
+    const response = await axios.get(url);
+    const $ = cheerio.load(response.data);
+
+    const items = $('a.storylink')
+        .map(function() {
+            return {
+                title: $(this).text(),
+                link: $(this).attr('href'),
+                author: 'Hacker News',
+                description: '',
+            };
+        })
+        .get();
+
+    $('a.hnuser').each(function(i) {
+        items[i].author = $(this).text();
+    });
+
+    $('tr.athing').each(function(i) {
+        const commURL = `${host}/item?id=` + $(this).attr('id');
+        const item = items[i];
+
+        if (showStory) {
+            item.description = `Comments: <a href="${commURL}"> ${commURL} </a>`;
+        } else {
+            item.description = `Link: <a href="${item.link}"> ${item.title} </a>`;
+            item.link = commURL;
+        }
+    });
+
+    let title = `Hacker News: ${section}`;
+    if (!showStory) {
+        title += '/comments';
+    }
+
+    ctx.state.data = {
+        title: title,
+        link: url,
+        item: items,
+    };
+};