badge(reddit): add Reddit service (#511)

api/reddit.ts

@@ -0,0 +1,60 @@
+import got from '../libs/got'
+import { millify } from '../libs/utils'
+import { createBadgenHandler, PathArgs } from '../libs/create-badgen-handler'
+
+const BRAND_COLOR = 'FF4500'
+
+const client = got.extend({ prefixUrl: 'https://www.reddit.com' })
+
+export default createBadgenHandler({
+  title: 'Reddit',
+  examples: {
+    '/reddit/karma/u/spez': 'karma',
+    '/reddit/post-karma/u/spez': 'post karma',
+    '/reddit/comment-karma/u/spez': 'comment karma',
+    '/reddit/subscribers/r/programming': 'subreddit subscribers'
+  },
+  handlers: {
+    '/reddit/:topic<karma|comment-karma|post-karma>/u/:user': karmaHandler,
+    '/reddit/:topic<karma|comment-karma|post-karma>/:user': karmaHandler,
+    '/reddit/subscribers/r/:subreddit': subscribersHandler,
+    '/reddit/subscribers/:subreddit': subscribersHandler
+  }
+})
+
+async function karmaHandler ({ topic, user }: PathArgs) {
+  // https://www.reddit.com/dev/api/#GET_user_{username}_about
+  const { data } = await client.get(`user/${user}/about.json`).json<any>()
+
+  switch (topic) {
+    case 'karma':
+      return {
+        subject: `u/${user}`,
+        status: `${millify(data.total_karma)} karma`,
+        color: BRAND_COLOR
+      }
+    case 'comment-karma':
+      return {
+        subject: `u/${user}`,
+        status: `${millify(data.comment_karma)} comment karma`,
+        color: BRAND_COLOR
+      }
+    case 'post-karma':
+      return {
+        subject: `u/${user}`,
+        status: `${millify(data.link_karma)} post karma`,
+        color: BRAND_COLOR
+      }
+  }
+}
+
+async function subscribersHandler ({ subreddit }: PathArgs) {
+  subreddit = `r/${subreddit}`
+  // https://www.reddit.com/dev/api/#GET_r_{subreddit}_about
+  const { data } = await client.get(`${subreddit}/about.json`).json<any>()
+  return {
+    subject: subreddit,
+    status: `${millify(data.subscribers)} subscribers`,
+    color: BRAND_COLOR
+  }
+}

libs/badge-list.ts

@@ -62,6 +62,7 @@ export const liveBadgeList = [
   // social
   'devrant',
   'peertube',
+  'reddit',
   // chat
   'discord',
   'gitter',