feat: 增加洛谷用户动态 RSS (#5611)

docs/programming.md

@@ -570,6 +570,10 @@ GitHub 官方也提供了一些 RSS:
 
 <Route author="prnake" example="/luogu/contest" path="/luogu/contest"/>
 
+### 用户动态
+
+<Route author="solstice23" example="/luogu/user/feed/1" path="/luogu/user/feed/:uid" :paramsDesc="['用户 UID']"/>
+
 ## 码农俱乐部
 
 ### 话题

lib/router.js

@@ -1399,6 +1399,7 @@ router.get('/bjp/apod', require('./routes/bjp/apod'));
 // 洛谷
 router.get('/luogu/daily/:id?', require('./routes/luogu/daily'));
 router.get('/luogu/contest', require('./routes/luogu/contest'));
+router.get('/luogu/user/feed/:uid', require('./routes/luogu/userFeed'));
 
 // 决胜网
 router.get('/juesheng', require('./routes/juesheng'));

lib/routes/luogu/userFeed.js

@@ -0,0 +1,38 @@
+const got = require('@/utils/got');
+
+module.exports = async (ctx) => {
+    const getUsernameFromUID = async (uid) => {
+        const key = 'luogu-username-from-uid-' + uid;
+        let name = await ctx.cache.get(key);
+        if (!name) {
+            const nameResponse = await got({
+                method: 'get',
+                url: `https://www.luogu.com.cn/user/${uid}?_contentOnly=1`,
+            });
+            name = nameResponse.data.currentData.user.name;
+            ctx.cache.set(key, name);
+        }
+        return name;
+    };
+
+    const uid = ctx.params.uid;
+    const name = await getUsernameFromUID(uid);
+    const response = await got({
+        method: 'get',
+        url: `https://www.luogu.com.cn/api/feed/list?user=${uid}`,
+    });
+    const data = response.data.feeds.result;
+
+    ctx.state.data = {
+        title: `${name} 的洛谷动态`,
+        link: `https://www.luogu.com.cn/user/${uid}#activity`,
+        allowEmpty: true,
+        item: data.map((item) => ({
+            title: item.content,
+            description: item.content,
+            pubDate: new Date(item.time * 1000).toUTCString(),
+            link: `https://www.luogu.com.cn/user/${uid}#activity`,
+            guid: item.id,
+        })),
+    };
+};