Block comments from muted accounts/servers

Add better control for users of comments displayed on their videos:

 * Do not forward comments from muted remote accounts/servers (muted by the current server or by the video owner)
 * Do not list threads and hide replies (with their children) of accounts/servers muted by the video owner
 * Hide from RSS comments of muted accounts/servers by video owners

Use case:
  * Try to limit spam propagation in the federation
  * Add ability for users to automatically hide comments on their videos from undesirable accounts/servers (the comment section belongs to videomakers, so they choose what's posted there)

3 files changed, 63 insertions, 40 deletions

diff --git a/server/lib/activitypub/process/process-create.ts b/server/lib/activitypub/process/process-create.ts
index 566bf6992..f8f9b80c6 100644
--- a/server/lib/activitypub/process/process-create.ts
+++ b/server/lib/activitypub/process/process-create.ts
@@ -1,18 +1,19 @@
+import { isRedundancyAccepted } from '@server/lib/redundancy'
 import { ActivityCreate, CacheFileObject, VideoTorrentObject } from '../../../../shared'
+import { PlaylistObject } from '../../../../shared/models/activitypub/objects/playlist-object'
 import { VideoCommentObject } from '../../../../shared/models/activitypub/objects/video-comment-object'
 import { retryTransactionWrapper } from '../../../helpers/database-utils'
 import { logger } from '../../../helpers/logger'
 import { sequelizeTypescript } from '../../../initializers/database'
-import { resolveThread } from '../video-comments'
-import { getOrCreateVideoAndAccountAndChannel } from '../videos'
-import { forwardVideoRelatedActivity } from '../send/utils'
-import { createOrUpdateCacheFile } from '../cache-file'
-import { Notifier } from '../../notifier'
-import { PlaylistObject } from '../../../../shared/models/activitypub/objects/playlist-object'
-import { createOrUpdateVideoPlaylist } from '../playlist'
 import { APProcessorOptions } from '../../../typings/activitypub-processor.model'
 import { MActorSignature, MCommentOwnerVideo, MVideoAccountLightBlacklistAllFiles } from '../../../typings/models'
-import { isRedundancyAccepted } from '@server/lib/redundancy'
+import { Notifier } from '../../notifier'
+import { createOrUpdateCacheFile } from '../cache-file'
+import { createOrUpdateVideoPlaylist } from '../playlist'
+import { forwardVideoRelatedActivity } from '../send/utils'
+import { resolveThread } from '../video-comments'
+import { getOrCreateVideoAndAccountAndChannel } from '../videos'
+import { isBlockedByServerOrAccount } from '@server/lib/blocklist'
 
 async function processCreateActivity (options: APProcessorOptions<ActivityCreate>) {
   const { activity, byActor } = options
@@ -101,6 +102,12 @@ async function processCreateVideoComment (activity: ActivityCreate, byActor: MAc
     return
   }
 
+  // Try to not forward unwanted commments on our videos
+  if (video.isOwned() && await isBlockedByServerOrAccount(comment.Account, video.VideoChannel.Account)) {
+    logger.info('Skip comment forward from blocked account or server %s.', comment.Account.Actor.url)
+    return
+  }
+
   if (video.isOwned() && created === true) {
     // Don't resend the activity to the sender
     const exceptions = [ byActor ]
diff --git a/server/lib/blocklist.ts b/server/lib/blocklist.ts
index 842eecb5b..d282d091b 100644
--- a/server/lib/blocklist.ts
+++ b/server/lib/blocklist.ts
@@ -1,5 +1,6 @@
 import { sequelizeTypescript } from '@server/initializers/database'
-import { MAccountBlocklist, MServerBlocklist } from '@server/typings/models'
+import { getServerActor } from '@server/models/application/application'
+import { MAccountBlocklist, MAccountId, MAccountServer, MServerBlocklist } from '@server/typings/models'
 import { AccountBlocklistModel } from '../models/account/account-blocklist'
 import { ServerBlocklistModel } from '../models/server/server-blocklist'
 
@@ -33,9 +34,29 @@ function removeServerFromBlocklist (serverBlock: MServerBlocklist) {
   })
 }
 
+async function isBlockedByServerOrAccount (targetAccount: MAccountServer, userAccount?: MAccountId) {
+  const serverAccountId = (await getServerActor()).Account.id
+  const sourceAccounts = [ serverAccountId ]
+
+  if (userAccount) sourceAccounts.push(userAccount.id)
+
+  const accountMutedHash = await AccountBlocklistModel.isAccountMutedByMulti(sourceAccounts, targetAccount.id)
+  if (accountMutedHash[serverAccountId] || (userAccount && accountMutedHash[userAccount.id])) {
+    return true
+  }
+
+  const instanceMutedHash = await ServerBlocklistModel.isServerMutedByMulti(sourceAccounts, targetAccount.Actor.serverId)
+  if (instanceMutedHash[serverAccountId] || (userAccount && instanceMutedHash[userAccount.id])) {
+    return true
+  }
+
+  return false
+}
+
 export {
   addAccountInBlocklist,
   addServerInBlocklist,
   removeAccountFromBlocklist,
-  removeServerFromBlocklist
+  removeServerFromBlocklist,
+  isBlockedByServerOrAccount
 }
diff --git a/server/lib/notifier.ts b/server/lib/notifier.ts
index 017739523..89f91e031 100644
--- a/server/lib/notifier.ts
+++ b/server/lib/notifier.ts
@@ -1,12 +1,22 @@
+import { getServerActor } from '@server/models/application/application'
+import { ServerBlocklistModel } from '@server/models/server/server-blocklist'
+import {
+  MUser,
+  MUserAccount,
+  MUserDefault,
+  MUserNotifSettingAccount,
+  MUserWithNotificationSetting,
+  UserNotificationModelForApi
+} from '@server/typings/models/user'
+import { MVideoImportVideo } from '@server/typings/models/video/video-import'
 import { UserNotificationSettingValue, UserNotificationType, UserRight } from '../../shared/models/users'
+import { VideoAbuse, VideoPrivacy, VideoState } from '../../shared/models/videos'
 import { logger } from '../helpers/logger'
-import { Emailer } from './emailer'
-import { UserNotificationModel } from '../models/account/user-notification'
-import { UserModel } from '../models/account/user'
-import { PeerTubeSocket } from './peertube-socket'
 import { CONFIG } from '../initializers/config'
-import { VideoPrivacy, VideoState, VideoAbuse } from '../../shared/models/videos'
 import { AccountBlocklistModel } from '../models/account/account-blocklist'
+import { UserModel } from '../models/account/user'
+import { UserNotificationModel } from '../models/account/user-notification'
+import { MAccountServer, MActorFollowFull } from '../typings/models'
 import {
   MCommentOwnerVideo,
   MVideoAbuseVideo,
@@ -15,18 +25,9 @@ import {
   MVideoBlacklistVideo,
   MVideoFullLight
 } from '../typings/models/video'
-import {
-  MUser,
-  MUserAccount,
-  MUserDefault,
-  MUserNotifSettingAccount,
-  MUserWithNotificationSetting,
-  UserNotificationModelForApi
-} from '@server/typings/models/user'
-import { MAccountDefault, MActorFollowFull } from '../typings/models'
-import { MVideoImportVideo } from '@server/typings/models/video/video-import'
-import { ServerBlocklistModel } from '@server/models/server/server-blocklist'
-import { getServerActor } from '@server/models/application/application'
+import { isBlockedByServerOrAccount } from './blocklist'
+import { Emailer } from './emailer'
+import { PeerTubeSocket } from './peertube-socket'
 
 class Notifier {
 
@@ -169,7 +170,7 @@ class Notifier {
     // Not our user or user comments its own video
     if (!user || comment.Account.userId === user.id) return
 
-    if (await this.isBlockedByServerOrAccount(user, comment.Account)) return
+    if (await this.isBlockedByServerOrUser(comment.Account, user)) return
 
     logger.info('Notifying user %s of new comment %s.', user.username, comment.url)
 
@@ -270,7 +271,7 @@ class Notifier {
     const followerAccount = actorFollow.ActorFollower.Account
     const followerAccountWithActor = Object.assign(followerAccount, { Actor: actorFollow.ActorFollower })
 
-    if (await this.isBlockedByServerOrAccount(user, followerAccountWithActor)) return
+    if (await this.isBlockedByServerOrUser(followerAccountWithActor, user)) return
 
     logger.info('Notifying user %s of new follower: %s.', user.username, followerAccount.getDisplayName())
 
@@ -299,6 +300,9 @@ class Notifier {
   private async notifyAdminsOfNewInstanceFollow (actorFollow: MActorFollowFull) {
     const admins = await UserModel.listWithRight(UserRight.MANAGE_SERVER_FOLLOW)
 
+    const follower = Object.assign(actorFollow.ActorFollower.Account, { Actor: actorFollow.ActorFollower })
+    if (await this.isBlockedByServerOrUser(follower)) return
+
     logger.info('Notifying %d administrators of new instance follower: %s.', admins.length, actorFollow.ActorFollower.url)
 
     function settingGetter (user: MUserWithNotificationSetting) {
@@ -590,17 +594,8 @@ class Notifier {
     return value & UserNotificationSettingValue.WEB
   }
 
-  private async isBlockedByServerOrAccount (user: MUserAccount, targetAccount: MAccountDefault) {
-    const serverAccountId = (await getServerActor()).Account.id
-    const sourceAccounts = [ serverAccountId, user.Account.id ]
-
-    const accountMutedHash = await AccountBlocklistModel.isAccountMutedByMulti(sourceAccounts, targetAccount.id)
-    if (accountMutedHash[serverAccountId] || accountMutedHash[user.Account.id]) return true
-
-    const instanceMutedHash = await ServerBlocklistModel.isServerMutedByMulti(sourceAccounts, targetAccount.Actor.serverId)
-    if (instanceMutedHash[serverAccountId] || instanceMutedHash[user.Account.id]) return true
-
-    return false
+  private isBlockedByServerOrUser (targetAccount: MAccountServer, user?: MUserAccount) {
+    return isBlockedByServerOrAccount(targetAccount, user?.Account)
   }
 
   static get Instance () {