+
+async function processUndoLike (byActor: MActorSignature, activity: ActivityUndo) {
+ const likeActivity = activity.object as ActivityLike
+
+ const { video } = await getOrCreateAPVideo({ videoObject: likeActivity.object })
+
+ return sequelizeTypescript.transaction(async t => {
+ if (!byActor.Account) throw new Error('Unknown account ' + byActor.url)
+
+ const rate = await AccountVideoRateModel.loadByAccountAndVideoOrUrl(byActor.Account.id, video.id, likeActivity.id, t)
+ if (!rate || rate.type !== 'like') throw new Error(`Unknown like by account ${byActor.Account.id} for video ${video.id}.`)
+
+ await rate.destroy({ transaction: t })
+ await video.decrement('likes', { transaction: t })
+
+ if (video.isOwned()) {
+ // Don't resend the activity to the sender
+ const exceptions = [ byActor ]
+
+ await forwardVideoRelatedActivity(activity, t, exceptions, video)
+ }
+ })
+}
+
+async function processUndoDislike (byActor: MActorSignature, activity: ActivityUndo) {
+ const dislike = activity.object.type === 'Dislike'
+ ? activity.object
+ : activity.object.object as DislikeObject
+
+ const { video } = await getOrCreateAPVideo({ videoObject: dislike.object })
+
+ return sequelizeTypescript.transaction(async t => {
+ if (!byActor.Account) throw new Error('Unknown account ' + byActor.url)
+
+ const rate = await AccountVideoRateModel.loadByAccountAndVideoOrUrl(byActor.Account.id, video.id, dislike.id, t)
+ if (!rate || rate.type !== 'dislike') throw new Error(`Unknown dislike by account ${byActor.Account.id} for video ${video.id}.`)
+
+ await rate.destroy({ transaction: t })
+ await video.decrement('dislikes', { transaction: t })
+
+ if (video.isOwned()) {
+ // Don't resend the activity to the sender
+ const exceptions = [ byActor ]
+
+ await forwardVideoRelatedActivity(activity, t, exceptions, video)
+ }
+ })
+}
+
+async function processUndoCacheFile (byActor: MActorSignature, activity: ActivityUndo) {
+ const cacheFileObject = activity.object.object as CacheFileObject
+
+ const { video } = await getOrCreateAPVideo({ videoObject: cacheFileObject.object })
+
+ return sequelizeTypescript.transaction(async t => {
+ const cacheFile = await VideoRedundancyModel.loadByUrl(cacheFileObject.id)
+ if (!cacheFile) {
+ logger.debug('Cannot undo unknown video cache %s.', cacheFileObject.id)
+ return
+ }
+
+ if (cacheFile.actorId !== byActor.id) throw new Error('Cannot delete redundancy ' + cacheFile.url + ' of another actor.')
+
+ await cacheFile.destroy()
+
+ if (video.isOwned()) {
+ // Don't resend the activity to the sender
+ const exceptions = [ byActor ]
+
+ await forwardVideoRelatedActivity(activity, t, exceptions, video)
+ }
+ })
+}
+
+function processUndoFollow (follower: MActorSignature, followActivity: ActivityFollow) {
+ return sequelizeTypescript.transaction(async t => {
+ const following = await ActorModel.loadByUrlAndPopulateAccountAndChannel(followActivity.object, t)
+ const actorFollow = await ActorFollowModel.loadByActorAndTarget(follower.id, following.id, t)
+
+ if (!actorFollow) throw new Error(`'Unknown actor follow ${follower.id} -> ${following.id}.`)
+
+ await actorFollow.destroy({ transaction: t })
+
+ return undefined
+ })
+}
+
+function processUndoAnnounce (byActor: MActorSignature, announceActivity: ActivityAnnounce) {
+ return sequelizeTypescript.transaction(async t => {
+ const share = await VideoShareModel.loadByUrl(announceActivity.id, t)
+ if (!share) throw new Error(`Unknown video share ${announceActivity.id}.`)
+
+ if (share.actorId !== byActor.id) throw new Error(`${share.url} is not shared by ${byActor.url}.`)
+
+ await share.destroy({ transaction: t })
+
+ if (share.Video.isOwned()) {
+ // Don't resend the activity to the sender
+ const exceptions = [ byActor ]
+
+ await forwardVideoRelatedActivity(announceActivity, t, exceptions, share.Video)
+ }
+ })
+}