feat: 果壳 物种日历 (#2768)

* feat:果壳 物种日历

* feat:将‘果壳 物种日历’扩展至吃货研究所，美丽也是技术活

* 全文获取使用缓存

docs/other.md

@@ -539,6 +539,14 @@ type 为 all 时，category 参数不支持 cost 和 free
 
 <Route author="alphardex" example="/guokr/scientific" path="/guokr/scientific"/>
 
+### 果壳网专栏
+
+<Route author="DHPO" example="/guokr/calendar" path="/guokr/:category" :paramsDesc="['专栏类别']">
+| 物种日历 | 吃货研究所 | 美丽也是技术活 |
+| ------- | ---------| ------------ |
+| calendar | institute | beauty |
+</Route>
+
 ## 后续
 
 ### Live

lib/router.js

@@ -696,6 +696,7 @@ router.get('/ifanr/:channel?', require('./routes/ifanr/index'));
 
 // 果壳网
 router.get('/guokr/scientific', require('./routes/guokr/scientific'));
+router.get('/guokr/:category', require('./routes/guokr/calendar'));
 
 // 联合早报
 router.get('/zaobao/realtime/:type?', require('./routes/zaobao/realtime'));

lib/routes/guokr/calendar.js

@@ -0,0 +1,46 @@
+const got = require('@/utils/got');
+
+async function loadFullPage(ctx, id) {
+    const link = `https://apis.guokr.com/minisite/article/${id}.json`;
+    const content = await ctx.cache.tryGet(link, async () => {
+        const res = await got.get(link);
+        return res.data.result.content;
+    });
+    return content;
+}
+
+const categoryMap = {
+    calendar: '物种日历',
+    institute: '吃货研究所',
+    beauty: '美丽也是技术活',
+};
+
+module.exports = async (ctx) => {
+    const category = ctx.params.category;
+    if (categoryMap[category] === undefined) {
+        throw new Error(`Unknown category ${category}`);
+    }
+
+    const response = await got.get(`https://www.guokr.com/${category}`);
+
+    const rule = /(?<=<script>\s*window\.INITIAL_STORE=)[\s\S]*?(?=<\/script>)/g; // 在某个script标签下可以找到文章信息
+    const data = JSON.parse(rule.exec(response.data)[0]);
+    const items = data[`${category}ArticleListStore`].articleList;
+
+    const result = await Promise.all(
+        items.map(async (item) => ({
+            title: item.title,
+            description: await loadFullPage(ctx, item.id), // Mercury 无法正确解析全文，故这里手动加载
+            pubDate: item.date_published,
+            link: item.url,
+            author: item.external_author.nickname,
+        }))
+    );
+
+    ctx.state.data = {
+        title: `果壳网 ${categoryMap[category]}`,
+        link: 'https://www.guokr.com/calendar',
+        description: `果壳网 ${categoryMap[category]}`,
+        item: result,
+    };
+};