feat(ctan): add rating badge

api/ctan.ts

@@ -1,5 +1,5 @@
 import got from '../libs/got'
-import { version, versionColor } from '../libs/utils'
+import { millify, version, versionColor } from '../libs/utils'
 import { createBadgenHandler, PathArgs } from '../libs/create-badgen-handler'
 
 const CTAN_API_URL = 'https://ctan.org/json/2.0/'
@@ -10,10 +10,11 @@ export default createBadgenHandler({
   title: 'CTAN',
   examples: {
     '/ctan/v/latexindent': 'version',
-    '/ctan/license/latexdiff': 'license'
+    '/ctan/license/latexdiff': 'license',
+    '/ctan/rating/pgf-pie': 'rating'
   },
   handlers: {
-    '/ctan/:topic<v|license>/:pkg': handler,
+    '/ctan/:topic<v|license|rating>/:pkg': handler,
   }
 })
 
@@ -22,7 +23,7 @@ async function handler ({ topic, pkg }: PathArgs) {
     license,
     version: versionInfo,
   } = await client.get(`pkg/${pkg}`).json<any>()
-  const { number: ver } = versionInfo;
+  const { number: ver } = versionInfo
 
   switch (topic) {
     case 'v':
@@ -37,5 +38,23 @@ async function handler ({ topic, pkg }: PathArgs) {
         status: license || 'unknown',
         color: 'green'
       }
+    case 'rating': {
+      const url = 'https://ctan.org/vote/ajaxSummary'
+      const searchParams = { pkg }
+      const html = await got.get(url, { searchParams }).text()
+      const rating = Number(html.match(/<span>.*?([\d.]+)\s/i)?.[1])
+      if (Number.isNaN(rating)) {
+        return {
+          subject: 'rating',
+          status: 'invalid',
+          color: 'grey'
+        }
+      }
+      return {
+        subject: 'rating',
+        status: millify(rating),
+        color: 'green'
+      }
+    }
   }
 }