feat: 添加CNU视觉联盟 (#3152)

* add cnu

* fix duplicate

docs/picture.md

@@ -16,6 +16,20 @@ pageClass: routes
 
 <Route author="FHYunCai" example="/bing" path="/bing"/>
 
+## CNU 视觉联盟
+
+### 每日精选
+
+<Route author="hoilc" example="/cnu/selected" path="/cnu/selected" />
+
+### 发现
+
+<Route author="hoilc" example="/cnu/discovery/hot/自然" path="/cnu/discovery/:type?/:category?" :paramsDesc="['板块类型, 默认为`热门`, 具体参见下表', '图片类别, 默认为`0`代表全部, 可参见[这里](http://www.cnu.cc/discoveryPage/hot-0)']"/>
+
+| 热门 | 推荐      | 最新   |
+| ---- | --------- | ------ |
+| hot  | recommend | recent |
+
 ## Dilbert Comic Strip
 
 <Route name="Daily Strip" author="Maecenas" example="/dilbert/strip" path="/dilbert/strip">

lib/router.js

@@ -1763,4 +1763,8 @@ router.get('/taptap/review/:id/:order?', require('./routes/taptap/review'));
 // lofter
 router.get('/lofter/tag/:name/:type?', require('./routes/lofter/tag'));
 
+// CNU视觉联盟
+router.get('/cnu/selected', require('./routes/cnu/selected'));
+router.get('/cnu/discovery/:type?/:category?', require('./routes/cnu/discovery'));
+
 module.exports = router;

lib/routes/cnu/discovery.js

@@ -0,0 +1,62 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+const utils = require('./utils');
+
+const types = {
+    hot: '热门',
+    recommend: '推荐',
+    recent: '最新',
+};
+
+module.exports = async (ctx) => {
+    const type = ctx.params.type ? ctx.params.type : 'hot';
+    const category = ctx.params.category ? ctx.params.category : '0';
+    const category_name = category === '0' ? '全部' : category;
+
+    const url = `http://www.cnu.cc/discoveryPage/${type}-${encodeURIComponent(category)}`;
+
+    const list_response = await got.get(url);
+    const $ = cheerio.load(list_response.data);
+
+    const list = $('.grid-item.work-thumbnail').toArray();
+
+    const out = await Promise.all(
+        list.map(async (item) => {
+            const $ = cheerio.load(item);
+            const title = $('.title');
+            const link = $('a.thumbnail').attr('href');
+
+            const cache = await ctx.cache.get(link);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+
+            const rssitem = {
+                title: title.text().trim(),
+                link: link,
+            };
+
+            try {
+                const response = await got.get(link);
+                const result = utils.parseContent(response.data);
+                if (!result) {
+                    return Promise.resolve('');
+                }
+
+                rssitem.author = result.author;
+                rssitem.description = result.description;
+                rssitem.pubDate = result.pubDate;
+            } catch (err) {
+                return Promise.resolve('');
+            }
+            ctx.cache.set(link, JSON.stringify(rssitem));
+            return Promise.resolve(rssitem);
+        })
+    );
+
+    ctx.state.data = {
+        title: `CNU视觉联盟 - ${types[type]} - ${category_name}`,
+        link: url,
+        item: out.filter((item) => item !== ''),
+    };
+};

lib/routes/cnu/selected.js

@@ -0,0 +1,52 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+const utils = require('./utils');
+
+module.exports = async (ctx) => {
+    const url = 'http://www.cnu.cc/selectedPage';
+
+    const list_response = await got.get(url);
+    const $ = cheerio.load(list_response.data);
+
+    const list = $('.selectedUL > .bannerLi').toArray();
+
+    const out = await Promise.all(
+        list.map(async (item) => {
+            const $ = cheerio.load(item);
+            const title = $('.workTitle');
+            const link = title.parent().attr('href');
+
+            const cache = await ctx.cache.get(link);
+            if (cache) {
+                return Promise.resolve(JSON.parse(cache));
+            }
+
+            const rssitem = {
+                title: title.text().trim(),
+                link: link,
+            };
+
+            try {
+                const response = await got.get(link);
+                const result = utils.parseContent(response.data);
+                if (!result) {
+                    return Promise.resolve('');
+                }
+
+                rssitem.author = result.author;
+                rssitem.description = result.description;
+                rssitem.pubDate = result.pubDate;
+            } catch (err) {
+                return Promise.resolve('');
+            }
+            ctx.cache.set(link, JSON.stringify(rssitem));
+            return Promise.resolve(rssitem);
+        })
+    );
+
+    ctx.state.data = {
+        title: `CNU视觉联盟 - 每日精选`,
+        link: url,
+        item: out.filter((item) => item !== ''),
+    };
+};

lib/routes/cnu/utils.js

@@ -0,0 +1,28 @@
+const cheerio = require('cheerio');
+
+const pic_base_url = 'http://img.cnu.cc/uploads/images/920/';
+
+const parseContent = (htmlString) => {
+    const $ = cheerio.load(htmlString);
+
+    const author = $('.author-info > a');
+    const time = $('.author-info > .timeago');
+    const content = $('#work_body');
+
+    const imgs_json = JSON.parse($('#imgs_json').text());
+    for (let k = 0; k < imgs_json.length; k++) {
+        content.append(`<img src="${pic_base_url}${imgs_json[k].img}" />`);
+        content.append(`<div class='img_description'>${imgs_json[k].content}</div>`);
+        content.append(`<p>${imgs_json[k].text}</p>`);
+    }
+
+    return {
+        author: author.text().trim(),
+        description: content.html(),
+        pubDate: new Date(time.text().trim()),
+    };
+};
+
+module.exports = {
+    parseContent,
+};