Add auto follow back support for instances

1 files changed, 36 insertions, 0 deletions

diff --git a/server/lib/activitypub/follow.ts b/server/lib/activitypub/follow.ts
new file mode 100644
index 000000000..c57e43c91
--- /dev/null
+++ b/server/lib/activitypub/follow.ts
@@ -0,0 +1,36 @@
+import { MActorFollowActors } from '../../typings/models'
+import { CONFIG } from '../../initializers/config'
+import { SERVER_ACTOR_NAME } from '../../initializers/constants'
+import { JobQueue } from '../job-queue'
+import { logger } from '../../helpers/logger'
+import { getServerActor } from '../../helpers/utils'
+import { ServerModel } from '@server/models/server/server'
+
+async function autoFollowBackIfNeeded (actorFollow: MActorFollowActors) {
+  if (!CONFIG.FOLLOWINGS.INSTANCE.AUTO_FOLLOW_BACK.ENABLED) return
+
+  const follower = actorFollow.ActorFollower
+
+  if (follower.type === 'Application' && follower.preferredUsername === SERVER_ACTOR_NAME) {
+    logger.info('Auto follow back %s.', follower.url)
+
+    const me = await getServerActor()
+
+    const server = await ServerModel.load(follower.serverId)
+    const host = server.host
+
+    const payload = {
+      host,
+      name: SERVER_ACTOR_NAME,
+      followerActorId: me.id,
+      isAutoFollow: true
+    }
+
+    JobQueue.Instance.createJob({ type: 'activitypub-follow', payload })
+            .catch(err => logger.error('Cannot create auto follow back job for %s.', host, err))
+  }
+}
+
+export {
+  autoFollowBackIfNeeded
+}