4 files changed, 36 insertions, 20 deletions

diff --git a/server/helpers/custom-validators/activitypub/misc.ts b/server/helpers/custom-validators/activitypub/misc.ts
index 279ad83dc..7df47cf15 100644
--- a/server/helpers/custom-validators/activitypub/misc.ts
+++ b/server/helpers/custom-validators/activitypub/misc.ts
@@ -51,7 +51,8 @@ function setValidAttributedTo (obj: any) {
   }
 
   obj.attributedTo = obj.attributedTo.filter(a => {
-    return (a.type === 'Group' || a.type === 'Person') && isActivityPubUrlValid(a.id)
+    return isActivityPubUrlValid(a) ||
+      ((a.type === 'Group' || a.type === 'Person') && isActivityPubUrlValid(a.id))
   })
 
   return true
diff --git a/server/lib/activitypub/actors/get.ts b/server/lib/activitypub/actors/get.ts
index e73b7d707..b2be3f5fb 100644
--- a/server/lib/activitypub/actors/get.ts
+++ b/server/lib/activitypub/actors/get.ts
@@ -3,8 +3,9 @@ import { logger } from '@server/helpers/logger'
 import { JobQueue } from '@server/lib/job-queue'
 import { ActorLoadByUrlType, loadActorByUrl } from '@server/lib/model-loaders'
 import { MActor, MActorAccountChannelId, MActorAccountChannelIdActor, MActorAccountId, MActorFullActor } from '@server/types/models'
-import { ActivityPubActor } from '@shared/models'
-import { getAPId } from '../activity'
+import { arrayify } from '@shared/core-utils'
+import { ActivityPubActor, APObjectId } from '@shared/models'
+import { fetchAPObject, getAPId } from '../activity'
 import { checkUrlsSameHost } from '../url'
 import { refreshActorIfNeeded } from './refresh'
 import { APActorCreator, fetchRemoteActor } from './shared'
@@ -40,7 +41,7 @@ async function getOrCreateAPActor (
     const { actorObject } = await fetchRemoteActor(actorUrl)
     if (actorObject === undefined) throw new Error('Cannot fetch remote actor ' + actorUrl)
 
-    // actorUrl is just an alias/rediraction, so process object id instead
+    // actorUrl is just an alias/redirection, so process object id instead
     if (actorObject.id !== actorUrl) return getOrCreateAPActor(actorObject, 'all', recurseIfNeeded, updateCollections)
 
     // Create the attributed to actor
@@ -68,29 +69,48 @@ async function getOrCreateAPActor (
   return actorRefreshed
 }
 
-function getOrCreateAPOwner (actorObject: ActivityPubActor, actorUrl: string) {
-  const accountAttributedTo = actorObject.attributedTo.find(a => a.type === 'Person')
-  if (!accountAttributedTo) throw new Error('Cannot find account attributed to video channel ' + actorUrl)
-
-  if (checkUrlsSameHost(accountAttributedTo.id, actorUrl) !== true) {
-    throw new Error(`Account attributed to ${accountAttributedTo.id} does not have the same host than actor url ${actorUrl}`)
+async function getOrCreateAPOwner (actorObject: ActivityPubActor, actorUrl: string) {
+  const accountAttributedTo = await findOwner(actorUrl, actorObject.attributedTo, 'Person')
+  if (!accountAttributedTo) {
+    throw new Error(`Cannot find account attributed to video channel  ${actorUrl}`)
   }
 
   try {
     // Don't recurse another time
     const recurseIfNeeded = false
-    return getOrCreateAPActor(accountAttributedTo.id, 'all', recurseIfNeeded)
+    return getOrCreateAPActor(accountAttributedTo, 'all', recurseIfNeeded)
   } catch (err) {
     logger.error('Cannot get or create account attributed to video channel ' + actorUrl)
     throw new Error(err)
   }
 }
 
+async function findOwner (rootUrl: string, attributedTo: APObjectId[] | APObjectId, type: 'Person' | 'Group') {
+  for (const actorToCheck of arrayify(attributedTo)) {
+    const actorObject = await fetchAPObject<ActivityPubActor>(getAPId(actorToCheck))
+
+    if (!actorObject) {
+      logger.warn('Unknown attributed to actor %s for owner %s', actorToCheck, rootUrl)
+      continue
+    }
+
+    if (checkUrlsSameHost(actorObject.id, rootUrl) !== true) {
+      logger.warn(`Account attributed to ${actorObject.id} does not have the same host than owner actor url ${rootUrl}`)
+      continue
+    }
+
+    if (actorObject.type === type) return actorObject
+  }
+
+  return undefined
+}
+
 // ---------------------------------------------------------------------------
 
 export {
   getOrCreateAPOwner,
-  getOrCreateAPActor
+  getOrCreateAPActor,
+  findOwner
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/lib/activitypub/playlists/create-update.ts b/server/lib/activitypub/playlists/create-update.ts
index 9339e8ea4..920d3943a 100644
--- a/server/lib/activitypub/playlists/create-update.ts
+++ b/server/lib/activitypub/playlists/create-update.ts
@@ -77,7 +77,7 @@ async function setVideoChannel (playlistObject: PlaylistObject, playlistAttribut
     throw new Error('Not attributed to for playlist object ' + getAPId(playlistObject))
   }
 
-  const actor = await getOrCreateAPActor(playlistObject.attributedTo[0], 'all')
+  const actor = await getOrCreateAPActor(getAPId(playlistObject.attributedTo[0]), 'all')
 
   if (!actor.VideoChannel) {
     logger.warn('Playlist "attributedTo" %s is not a video channel.', playlistObject.id, { playlistObject, ...lTags(playlistObject.id) })
diff --git a/server/lib/activitypub/videos/shared/abstract-builder.ts b/server/lib/activitypub/videos/shared/abstract-builder.ts
index 7c5c73139..8af67ecac 100644
--- a/server/lib/activitypub/videos/shared/abstract-builder.ts
+++ b/server/lib/activitypub/videos/shared/abstract-builder.ts
@@ -18,8 +18,7 @@ import {
   MVideoThumbnail
 } from '@server/types/models'
 import { ActivityTagObject, ThumbnailType, VideoObject, VideoStreamingPlaylistType } from '@shared/models'
-import { getOrCreateAPActor } from '../../actors'
-import { checkUrlsSameHost } from '../../url'
+import { findOwner, getOrCreateAPActor } from '../../actors'
 import {
   getCaptionAttributesFromObject,
   getFileAttributesFromUrl,
@@ -37,13 +36,9 @@ export abstract class APVideoAbstractBuilder {
   protected abstract lTags: LoggerTagsFn
 
   protected async getOrCreateVideoChannelFromVideoObject () {
-    const channel = this.videoObject.attributedTo.find(a => a.type === 'Group')
+    const channel = await findOwner(this.videoObject.id, this.videoObject.attributedTo, 'Group')
     if (!channel) throw new Error('Cannot find associated video channel to video ' + this.videoObject.url)
 
-    if (checkUrlsSameHost(channel.id, this.videoObject.id) !== true) {
-      throw new Error(`Video channel url ${channel.id} does not have the same host than video object id ${this.videoObject.id}`)
-    }
-
     return getOrCreateAPActor(channel.id, 'all')
   }