From 8c9e7875269a990ed3000e1d4995d808e4ff50f7 Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Tue, 7 Apr 2020 15:27:41 +0200
Subject: Add ability to accept or not remote redundancies

---
 server/lib/redundancy.ts | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

(limited to 'server/lib/redundancy.ts')

diff --git a/server/lib/redundancy.ts b/server/lib/redundancy.ts
index 78d84e02e..aa0e37478 100644
--- a/server/lib/redundancy.ts
+++ b/server/lib/redundancy.ts
@@ -2,7 +2,11 @@ import { VideoRedundancyModel } from '../models/redundancy/video-redundancy'
 import { sendUndoCacheFile } from './activitypub/send'
 import { Transaction } from 'sequelize'
 import { getServerActor } from '../helpers/utils'
-import { MVideoRedundancyVideo } from '@server/typings/models'
+import { MActorSignature, MVideoRedundancyVideo } from '@server/typings/models'
+import { CONFIG } from '@server/initializers/config'
+import { logger } from '@server/helpers/logger'
+import { ActorFollowModel } from '@server/models/activitypub/actor-follow'
+import { Activity } from '@shared/models'
 
 async function removeVideoRedundancy (videoRedundancy: MVideoRedundancyVideo, t?: Transaction) {
   const serverActor = await getServerActor()
@@ -21,9 +25,30 @@ async function removeRedundanciesOfServer (serverId: number) {
   }
 }
 
+async function isRedundancyAccepted (activity: Activity, byActor: MActorSignature) {
+  const configAcceptFrom = CONFIG.REMOTE_REDUNDANCY.VIDEOS.ACCEPT_FROM
+  if (configAcceptFrom === 'nobody') {
+    logger.info('Do not accept remote redundancy %s due instance accept policy.', activity.id)
+    return false
+  }
+
+  if (configAcceptFrom === 'followings') {
+    const serverActor = await getServerActor()
+    const allowed = await ActorFollowModel.isFollowedBy(byActor.id, serverActor.id)
+
+    if (allowed !== true) {
+      logger.info('Do not accept remote redundancy %s because actor %s is not followed by our instance.', activity.id, byActor.url)
+      return false
+    }
+  }
+
+  return true
+}
+
 // ---------------------------------------------------------------------------
 
 export {
+  isRedundancyAccepted,
   removeRedundanciesOfServer,
   removeVideoRedundancy
 }
-- 
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