Merge branch 'occupy5-guanchazhe' into HEAD

docs/other.md

@@ -290,6 +290,10 @@ type 为 all 时，category 参数不支持 cost 和 free
 
 <Route name="首页推荐" author="LogicJake" example="/gushiwen/recommend" path="/gushiwen/recommend"/>
 
+## 观察者风闻话题
+
+<Route name="观察者风闻话题" author="occupy5" example="/guancha/topic/113" path="/guancha/topic/:id" :paramsDesc="['话题id， 可在URL中找到']" />
+
 ## 果壳网
 
 <Route name="科学人" author="alphardex" example="/guokr/scientific" path="/guokr/scientific"/>

lib/router.js

@@ -1354,4 +1354,7 @@ router.get('/boc/whpj', require('./routes/boc/whpj'));
 // 漫画db
 router.get('/manhuadb/comics/:id', require('./routes/manhuadb/comics'));
 
+// 观察者风闻话题
+router.get('/guanchazhe/topic/:id', require('./routes/guanchazhe/topic'));
+
 module.exports = router;

lib/routes/guanchazhe/topic.js

@@ -0,0 +1,56 @@
+const cheerio = require('cheerio');
+const axios = require('../../utils/axios');
+const date = require('../../utils/date');
+const url = require('url');
+
+const host = 'https://user.guancha.cn';
+
+module.exports = async (ctx) => {
+    const id = ctx.params.id;
+    const link = `https://user.guancha.cn/topic/attention-topic?follow-topic-id=${id}`;
+    const res = await axios.get(encodeURI(link));
+    const $ = cheerio.load(res.data);
+    // 话题名称
+    const title = $('.topic-main').text();
+    // 文章列表
+    const list = $('.article-list .list-item h4')
+        .find('a')
+        .map((i, e) => $(e).attr('href'))
+        .get();
+
+    const out = await Promise.all(
+        list.map(async (itemUrl) => {
+            // 将相对链接替换为绝对链接
+            const absoluteUrl = url.resolve(host, itemUrl);
+            const cache = await ctx.cache.get(absoluteUrl);
+            // 判断缓存
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+            const res = await axios.get(absoluteUrl);
+            const $ = cheerio.load(res.data);
+
+            const dateStr = $('.user-main .time1').text();
+            const item = {
+                title: $('.article-content h1').text(),
+                author: $('.user-main h4')
+                    .first()
+                    .find('a')
+                    .text(),
+                link: absoluteUrl,
+                description: $('.article-txt-content').html(),
+                // 格式化日期
+                pubDate: date(dateStr),
+            };
+            ctx.cache.set(absoluteUrl, JSON.stringify(item), 24 * 60 * 60);
+
+            return Promise.resolve(item);
+        })
+    );
+
+    ctx.state.data = {
+        title: `风闻话题-${title}`,
+        link: link,
+        item: out,
+    };
+};