feat(route): add CodeForces recent actions (#11522)

* added CodeForces recent actions

* fixed link

* followed the v2 rule standard

lib/v2/codeforces/recent_actions.js

@@ -0,0 +1,47 @@
+const got = require('@/utils/got');
+const cheerio = require('cheerio');
+
+module.exports = async (ctx) => {
+    const minRating = ctx.params.minrating || 1;
+
+    const rsp = await got.get('https://codeforces.com/api/recentActions?maxCount=100').json();
+
+    const actions = rsp.result.map((action) => {
+        const pubDate = new Date(action.timeSeconds * 1000);
+
+        const blog = action.blogEntry;
+        const blogId = blog.id;
+        const blogTitle = cheerio.load(blog.title).text();
+
+        if (action.comment) {
+            const c = action.comment;
+            return {
+                title: `@${c.commentatorHandle} commented on "${blogTitle}"`,
+                description: cheerio.load(c.text).text(),
+                pubDate,
+                link: `https://codeforces.com/blog/entry/${blogId}?#comment-${c.id}`,
+                rating: c.rating,
+            };
+        }
+        return {
+            title: `@${blog.authorHandle} posted "${blogTitle}"`,
+            description: blogTitle,
+            pubDate,
+            link: `https://codeforces.com/blog/entry/${blogId}`,
+            rating: blog.rating,
+        };
+    });
+
+    ctx.state.data = {
+        title: 'Codeforces - Recent actions',
+        link: 'https://codeforces.com/recent-actions',
+        item: actions
+            .filter((a) => a.rating >= minRating)
+            .map((a) => ({
+                title: a.title,
+                description: a.description,
+                pubDate: a.pubDate,
+                link: a.link,
+            })),
+    };
+};