feat: add LearnKu 论坛 (#4197)

docs/bbs.md

@@ -40,6 +40,16 @@ pageClass: routes
 
 </Route>
 
+## LearnKu
+
+### 社区
+
+<Route author="haokaiyang" example="/learnku/laravel/qa" path="/learnku/:community/:category?" :paramsDesc="['社区 标识，可在 <https://learnku.com/communities> 找到', '分类，如果不传 `category` 则获取全部分类']"/>
+
+| 招聘 | 翻译         | 问答 | 链接  |
+| ---- | ------------ | ---- | ----- |
+| jobs | translations | qa   | links |
+
 ## MCBBS
 
 ### 版块

lib/router.js

@@ -2346,4 +2346,7 @@ router.get('/guat/news/:type?', require('./routes/guat/news'));
 // 国家留学网
 router.get('/csc/notice/:type?', require('./routes/csc/notice'));
 
+// LearnKu
+router.get('/learnku/:community/:category?', require('./routes/learnku/topic'));
+
 module.exports = router;

lib/routes/learnku/topic.js

@@ -0,0 +1,57 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+
+module.exports = async (ctx) => {
+    const community = ctx.params.community;
+    const category = ctx.params.category || '';
+
+    let url = `https://learnku.com/${community}`;
+    if (category !== '') {
+        url = `https://learnku.com/${community}/c/${category}`;
+    }
+
+    const response = await got({
+        method: 'get',
+        url: url,
+    });
+
+    const data = response.data;
+    const $ = cheerio.load(data);
+    const list = $('.simple-topic').get();
+    const title = $('.sidebar .community-details .header span').text();
+    $('.sidebar .community-details .main div div a').remove();
+    const description = $('.sidebar .community-details .main div div').text();
+    const categoryTitle = new Map([
+        ['translations', { name: '翻译' }],
+        ['jobs', { name: '招聘' }],
+        ['qa', { name: '问答' }],
+        ['links', { name: '链接' }],
+        ['', { name: '最新' }],
+    ]);
+
+    ctx.state.data = {
+        title: `LearnKu - ${title} - ${categoryTitle.get(category).name}`,
+        link: url,
+        description: description,
+        item: list
+            .map((item) => {
+                const $ = cheerio.load(item);
+                const categoryName = $('.category-name')
+                    .text()
+                    .trim();
+                if (['置顶', '广告'].includes(categoryName)) {
+                    return '';
+                }
+                $('.topic-title i').remove();
+                return {
+                    title: $('.topic-title')
+                        .text()
+                        .trim(),
+                    category: categoryName,
+                    link: $('.topic-title-wrap').attr('href'),
+                    pubDate: new Date($('.timeago').attr('title')).toUTCString(),
+                };
+            })
+            .filter((item) => item !== ''),
+    };
+};