add 12306最新动态 (#1644)

closes #1642

docs/README.md

@@ -3089,3 +3089,7 @@ type 为 all 时，category 参数不支持 cost 和 free
 <route name="推荐文章" author="WenryXu" example="/ui-cn/article" path="/ui-cn/article"/>
 
 <route name="个人作品" author="WenryXu" example="/ui-cn/user/85974" path="/ui-cn/user/:id" :paramsDesc="['用户id']"/>
+
+### 12306
+
+<route name="最新动态" author="LogicJake" example="/12306/zxdt" path="/12306/zxdt/:id?" :paramsDesc="['铁路局id，可在 URL 中找到，不填默认显示所有铁路局动态']"/>

lib/router.js

@@ -1101,4 +1101,7 @@ router.get('/ui-cn/user/:id', require('./routes/ui-cn/user'));
 // Dcard
 router.get('/dcard/posts/:type?', require('./routes/dcard/posts'));
 
+// 12306
+router.get('/12306/zxdt/:id?', require('./routes/12306/zxdt'));
+
 module.exports = router;

lib/routes/12306/zxdt.js

@@ -0,0 +1,77 @@
+const axios = require('../../utils/axios');
+const cheerio = require('cheerio');
+const url = require('url');
+
+module.exports = async (ctx) => {
+    const id = ctx.params.id || -1;
+
+    let link;
+    if (id === -1) {
+        link = 'https://www.12306.cn/mormhweb/zxdt/index_zxdt.html';
+    } else {
+        link = `https://www.12306.cn/mormhweb/1/${id}/index_fl.html`;
+    }
+
+    const response = await axios.get(link);
+    const data = response.data;
+    const $ = cheerio.load(data);
+    const name = $('div.nav_center > a:nth-child(4)').text();
+
+    const list = $('#newList > ul > li')
+        .slice(0, 10)
+        .map(function() {
+            const info = {
+                title: $(this)
+                    .find('a')
+                    .text(),
+                link: $(this)
+                    .find('a')
+                    .attr('href'),
+                date: $(this)
+                    .find('span')
+                    .text()
+                    .slice(1, -1),
+            };
+            return info;
+        })
+        .get();
+
+    const out = await Promise.all(
+        list.map(async (info) => {
+            const title = info.title;
+            const date = info.date;
+            const itemUrl = url.resolve(link, info.link);
+
+            const cache = await ctx.cache.get(itemUrl);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+
+            const response = await axios.get(itemUrl);
+            const $ = cheerio.load(response.data);
+            let description = $('.article-box').html();
+            if (description) {
+                description = description.replace(/src="/g, `src="${url.resolve(itemUrl, '.')}`).trim();
+            } else {
+                description = $('.content_text')
+                    .html()
+                    .trim();
+            }
+
+            const single = {
+                title: title,
+                link: itemUrl,
+                description: description,
+                pubDate: new Date(date).toUTCString(),
+            };
+            ctx.cache.set(itemUrl, JSON.stringify(single), 24 * 60 * 60);
+            return Promise.resolve(single);
+        })
+    );
+
+    ctx.state.data = {
+        title: `${name}最新动态`,
+        link: link,
+        item: out,
+    };
+};