增加南京航空航天大学 研究生院 RSS 订阅方式 (#1646)

第一次写JS，有很多不懂的地方，代码是仿照南航教务处RSS的改写，请大佬多多包涵！

docs/README.md

@@ -1474,6 +1474,12 @@ GitHub 官方也提供了一些 RSS:
 | -------- | -------- | -------- | -------- | -------- | -------- | -------- |
 | tzgg     | xwdt     | kydt     | jxdt     | xsgz     | zsxx     | jyxx     |
 
+<route name="研究生院" author="junfengP" example="/nuaa/yjsy/latest" path="/universities/nuaa/yjsy/:type?" :paramsDesc="['分类名']"/>
+
+| 最近动态 | 研院新闻 | 上级文件 | 管理文件 | 信息服务 |
+| -------- | -------- | -------- | -------- | -------- |
+| latest   | yyxw     | sjwj     | glwj     | xxfw     |
+
 ### 哈尔滨工业大学
 
 <route name="哈尔滨工业大学教务处通知公告" author="lty96117" example="/hit/jwc" path="/universities/hit/jwc"/>

lib/router.js

@@ -570,6 +570,7 @@ router.get('/seu/cse/:type?', require('./routes/universities/seu/cse'));
 // 南京航空航天大学
 router.get('/nuaa/jwc/:type?', require('./routes/universities/nuaa/jwc/jwc'));
 router.get('/nuaa/cs/:type?', require('./routes/universities/nuaa/cs/index'));
+router.get('/nuaa/yjsy/:type?', require('./routes/universities/nuaa/yjsy/yjsy'));
 
 // 哈尔滨工业大学
 router.get('/hit/jwc', require('./routes/universities/hit/jwc'));

lib/routes/universities/nuaa/yjsy/yjsy.js

@@ -0,0 +1,62 @@
+const axios = require('../../../../utils/axios');
+const cheerio = require('cheerio');
+const url = require('url');
+const host = 'http://www.graduate.nuaa.edu.cn/';
+
+const map = {
+    latest: '2146/list.htm',
+    yyxw: 'yyxw/list.htm',
+    sjwj: 'sjwj/list.htm',
+    glwj: '2017/list.htm',
+    xxfw: '2147/list.htm',
+};
+
+async function load(link, ctx) {
+    const cache = await ctx.cache.get(link);
+    if (cache) {
+        return cache;
+    }
+    const response = await axios.get(host + link);
+    const $ = cheerio.load(response.data);
+    const images = $('img');
+    for (let k = 0; k < images.length; k++) {
+        $(images[k]).replaceWith(`<img src="${url.resolve(host, $(images[k]).attr('src'))}" referrerpolicy="no-referrer" />`);
+    }
+    const description = $('.wp_articlecontent').html();
+    await ctx.cache.set(link, description);
+    return { description };
+}
+
+module.exports = async (ctx) => {
+    const type = ctx.params.type || 'latest';
+    const response = await axios({
+        method: 'get',
+        url: host + map[type],
+    });
+    const $ = cheerio.load(response.data);
+    const list = $('#news_list > tbody > tr > td > table > tbody > tr:nth-child(1)')
+        .slice(0, 10)
+        .get();
+    const process = await Promise.all(
+        list.map(async (item) => {
+            const a = $(item).find('td:nth-child(2) > a:nth-child(2)');
+            const t = $(item).find('td:nth-child(3)');
+            const itemUrl = a.attr('href');
+            const single = {
+                title: a.text(),
+                link: url.resolve(host, itemUrl),
+                guid: url.resolve(host, itemUrl),
+                pubDate: t.text().slice(0, 10),
+            };
+            const other = await load(itemUrl, ctx);
+            return Promise.resolve(Object.assign({}, single, other));
+        })
+    );
+
+    ctx.state.data = {
+        title: '南航研究生院',
+        link: host,
+        description: '南航研究生院RSS',
+        item: process,
+    };
+};