Federate likes/dislikes

server/lib/activitypub/process/process-like.ts

@@ -0,0 +1,50 @@
+import { ActivityLike } from '../../../../shared/models/activitypub/activity'
+import { database as db } from '../../../initializers'
+import { AccountInstance } from '../../../models/account/account-interface'
+import { getOrCreateAccountAndServer } from '../account'
+import { sendLikeToVideoFollowers } from '../send/send-like'
+import { retryTransactionWrapper } from '../../../helpers/database-utils'
+
+async function processLikeActivity (activity: ActivityLike) {
+  const account = await getOrCreateAccountAndServer(activity.actor)
+
+  return processLikeVideo(account, activity.object)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  processLikeActivity
+}
+
+// ---------------------------------------------------------------------------
+
+async function processLikeVideo (byAccount: AccountInstance, videoUrl: string) {
+  const options = {
+    arguments: [ byAccount, videoUrl ],
+    errorMessage: 'Cannot like the video with many retries.'
+  }
+
+  return retryTransactionWrapper(createVideoLike, options)
+}
+
+function createVideoLike (byAccount: AccountInstance, videoUrl: string) {
+  return db.sequelize.transaction(async t => {
+    const video = await db.Video.loadByUrlAndPopulateAccount(videoUrl)
+
+    if (!video) throw new Error('Unknown video ' + videoUrl)
+
+    const rate = {
+      type: 'like' as 'like',
+      videoId: video.id,
+      accountId: byAccount.id
+    }
+    const [ , created ] = await db.AccountVideoRate.findOrCreate({
+      where: rate,
+      defaults: rate
+    })
+    await video.increment('likes')
+
+    if (video.isOwned() && created === true) await sendLikeToVideoFollowers(byAccount, video, undefined)
+  })
+}