From 4ead40e7766f5964ecd9a11766ff56b95090fe1c Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Wed, 9 Jun 2021 13:34:40 +0200
Subject: Cache refresh actor promise

---
 server/lib/activitypub/actors/get.ts     |  2 +-
 server/lib/activitypub/actors/refresh.ts | 34 ++++++++++++++++++++++----------
 2 files changed, 25 insertions(+), 11 deletions(-)

(limited to 'server/lib/activitypub')

diff --git a/server/lib/activitypub/actors/get.ts b/server/lib/activitypub/actors/get.ts
index de93aa964..501ff74e3 100644
--- a/server/lib/activitypub/actors/get.ts
+++ b/server/lib/activitypub/actors/get.ts
@@ -56,7 +56,7 @@ async function getOrCreateAPActor (
   if (actor.Account) (actor as MActorAccountChannelIdActor).Account.Actor = actor
   if (actor.VideoChannel) (actor as MActorAccountChannelIdActor).VideoChannel.Actor = actor
 
-  const { actor: actorRefreshed, refreshed } = await refreshActorIfNeeded(actor, fetchType)
+  const { actor: actorRefreshed, refreshed } = await refreshActorIfNeeded({ actor, fetchedType: fetchType })
   if (!actorRefreshed) throw new Error('Actor ' + actor.url + ' does not exist anymore.')
 
   await scheduleOutboxFetchIfNeeded(actor, created, refreshed, updateCollections)
diff --git a/server/lib/activitypub/actors/refresh.ts b/server/lib/activitypub/actors/refresh.ts
index 1f7cfcd8f..b2fe3932f 100644
--- a/server/lib/activitypub/actors/refresh.ts
+++ b/server/lib/activitypub/actors/refresh.ts
@@ -1,4 +1,5 @@
 import { logger, loggerTagsFactory } from '@server/helpers/logger'
+import { PromiseCache } from '@server/helpers/promise-cache'
 import { PeerTubeRequestError } from '@server/helpers/requests'
 import { ActorLoadByUrlType } from '@server/lib/model-loaders'
 import { ActorModel } from '@server/models/actor/actor'
@@ -8,11 +9,30 @@ import { fetchRemoteActor } from './shared'
 import { APActorUpdater } from './updater'
 import { getUrlFromWebfinger } from './webfinger'
 
-async function refreshActorIfNeeded <T extends MActorFull | MActorAccountChannelId> (
-  actorArg: T,
+type RefreshResult <T> = Promise<{ actor: T | MActorFull, refreshed: boolean }>
+
+type RefreshOptions <T> = {
+  actor: T
   fetchedType: ActorLoadByUrlType
-): Promise<{ actor: T | MActorFull, refreshed: boolean }> {
-  if (!actorArg.isOutdated()) return { actor: actorArg, refreshed: false }
+}
+
+const promiseCache = new PromiseCache(doRefresh, (options: RefreshOptions<MActorFull | MActorAccountChannelId>) => options.actor.url)
+
+function refreshActorIfNeeded <T extends MActorFull | MActorAccountChannelId> (options: RefreshOptions<T>): RefreshResult <T> {
+  const actorArg = options.actor
+  if (!actorArg.isOutdated()) return Promise.resolve({ actor: actorArg, refreshed: false })
+
+  return promiseCache.run(options)
+}
+
+export {
+  refreshActorIfNeeded
+}
+
+// ---------------------------------------------------------------------------
+
+async function doRefresh <T extends MActorFull | MActorAccountChannelId> (options: RefreshOptions<T>): RefreshResult <MActorFull> {
+  const { actor: actorArg, fetchedType } = options
 
   // We need more attributes
   const actor = fetchedType === 'all'
@@ -52,12 +72,6 @@ async function refreshActorIfNeeded <T extends MActorFull | MActorAccountChannel
   }
 }
 
-export {
-  refreshActorIfNeeded
-}
-
-// ---------------------------------------------------------------------------
-
 function getActorUrl (actor: MActorFull) {
   return getUrlFromWebfinger(actor.preferredUsername + '@' + actor.getHost())
     .catch(err => {
-- 
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