feat: nautilus (topics) (#2459)

Co-authored-by: Enoch Ma <enoch@Enochs-Air.local>

docs/reading.md

@@ -10,6 +10,12 @@ pageClass: routes
 
 <Route author="HenryQW" example="/allpoetry/newest" path="/allpoetry/:order?" :paramsDesc="['排序方式, `best` 或 `newest`, 缺省 `best`']"/>
 
+## Nautilus
+
+### 话题
+
+<Route author="emdoe" example=“/nautilus/topic/Art” path="/nautilus/topic/:tid" :paramsDesc=“[‘话题 id, 可在页面上方 TOPICS 栏目处找到']"/>
+
 ## UU 看书
 
 ### 小说更新

lib/router.js

@@ -905,6 +905,9 @@ router.get('/coolbuy/newest', require('./routes/coolbuy/newest'));
 router.get('/nga/forum/:fid', require('./routes/nga/forum'));
 router.get('/nga/post/:tid', require('./routes/nga/post'));
 
+// Nautilus
+router.get('/nautilus/topic/:tid', require('./routes/nautilus/topics'));
+
 // JavBus
 router.get('/javbus/home', require('./routes/javbus/home'));
 router.get('/javbus/genre/:gid', require('./routes/javbus/genre'));

lib/routes/nautilus/topics.js

@@ -0,0 +1,41 @@
+const cheerio = require('cheerio');
+const got = require('@/utils/got');
+
+module.exports = async (ctx) => {
+    const url = `http://nautil.us/term/f/${ctx.params.tid}`;
+
+    const res = await got.get(url);
+    const $ = cheerio.load(res.data);
+    const list = $('article.search-result').get();
+
+    const out = await Promise.all(
+        list.map(async (item) => {
+            const $ = cheerio.load(item);
+            const title = $('h3 > a').text();
+            const partial = $('h3 > a').attr('href');
+            const address = `http://nautil.us${partial}`;
+            const cache = await ctx.cache.get(address);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+            const res = await got.get(address);
+            const capture = cheerio.load(res.data);
+            capture('div.reco').remove();
+            const banner = capture('div.banner').html();
+            const contents = banner + capture('div.page-content').html();
+            const single = {
+                title,
+                description: contents,
+                link: address,
+                guid: address,
+            };
+            ctx.cache.set(address, JSON.stringify(single));
+            return Promise.resolve(single);
+        })
+    );
+    ctx.state.data = {
+        title: 'Nautilus | ' + $('title').text(),
+        link: url,
+        item: out,
+    };
+};