Refactor AP actors

1 files changed, 116 insertions, 0 deletions

diff --git a/server/lib/local-actor.ts b/server/lib/local-actor.ts
new file mode 100644
index 000000000..55e77dd04
--- /dev/null
+++ b/server/lib/local-actor.ts
@@ -0,0 +1,116 @@
+import 'multer'
+import { queue } from 'async'
+import * as LRUCache from 'lru-cache'
+import { extname, join } from 'path'
+import { v4 as uuidv4 } from 'uuid'
+import { ActorModel } from '@server/models/actor/actor'
+import { ActivityPubActorType, ActorImageType } from '@shared/models'
+import { retryTransactionWrapper } from '../helpers/database-utils'
+import { processImage } from '../helpers/image-utils'
+import { downloadImage } from '../helpers/requests'
+import { CONFIG } from '../initializers/config'
+import { ACTOR_IMAGES_SIZE, LRU_CACHE, QUEUE_CONCURRENCY, WEBSERVER } from '../initializers/constants'
+import { sequelizeTypescript } from '../initializers/database'
+import { MAccountDefault, MActor, MChannelDefault } from '../types/models'
+import { deleteActorImageInstance, updateActorImageInstance } from './activitypub/actors'
+import { sendUpdateActor } from './activitypub/send'
+
+function buildActorInstance (type: ActivityPubActorType, url: string, preferredUsername: string) {
+  return new ActorModel({
+    type,
+    url,
+    preferredUsername,
+    publicKey: null,
+    privateKey: null,
+    followersCount: 0,
+    followingCount: 0,
+    inboxUrl: url + '/inbox',
+    outboxUrl: url + '/outbox',
+    sharedInboxUrl: WEBSERVER.URL + '/inbox',
+    followersUrl: url + '/followers',
+    followingUrl: url + '/following'
+  }) as MActor
+}
+
+async function updateLocalActorImageFile (
+  accountOrChannel: MAccountDefault | MChannelDefault,
+  imagePhysicalFile: Express.Multer.File,
+  type: ActorImageType
+) {
+  const imageSize = type === ActorImageType.AVATAR
+    ? ACTOR_IMAGES_SIZE.AVATARS
+    : ACTOR_IMAGES_SIZE.BANNERS
+
+  const extension = extname(imagePhysicalFile.filename)
+
+  const imageName = uuidv4() + extension
+  const destination = join(CONFIG.STORAGE.ACTOR_IMAGES, imageName)
+  await processImage(imagePhysicalFile.path, destination, imageSize)
+
+  return retryTransactionWrapper(() => {
+    return sequelizeTypescript.transaction(async t => {
+      const actorImageInfo = {
+        name: imageName,
+        fileUrl: null,
+        height: imageSize.height,
+        width: imageSize.width,
+        onDisk: true
+      }
+
+      const updatedActor = await updateActorImageInstance(accountOrChannel.Actor, type, actorImageInfo, t)
+      await updatedActor.save({ transaction: t })
+
+      await sendUpdateActor(accountOrChannel, t)
+
+      return type === ActorImageType.AVATAR
+        ? updatedActor.Avatar
+        : updatedActor.Banner
+    })
+  })
+}
+
+async function deleteLocalActorImageFile (accountOrChannel: MAccountDefault | MChannelDefault, type: ActorImageType) {
+  return retryTransactionWrapper(() => {
+    return sequelizeTypescript.transaction(async t => {
+      const updatedActor = await deleteActorImageInstance(accountOrChannel.Actor, type, t)
+      await updatedActor.save({ transaction: t })
+
+      await sendUpdateActor(accountOrChannel, t)
+
+      return updatedActor.Avatar
+    })
+  })
+}
+
+type DownloadImageQueueTask = { fileUrl: string, filename: string, type: ActorImageType }
+
+const downloadImageQueue = queue<DownloadImageQueueTask, Error>((task, cb) => {
+  const size = task.type === ActorImageType.AVATAR
+    ? ACTOR_IMAGES_SIZE.AVATARS
+    : ACTOR_IMAGES_SIZE.BANNERS
+
+  downloadImage(task.fileUrl, CONFIG.STORAGE.ACTOR_IMAGES, task.filename, size)
+    .then(() => cb())
+    .catch(err => cb(err))
+}, QUEUE_CONCURRENCY.ACTOR_PROCESS_IMAGE)
+
+function pushActorImageProcessInQueue (task: DownloadImageQueueTask) {
+  return new Promise<void>((res, rej) => {
+    downloadImageQueue.push(task, err => {
+      if (err) return rej(err)
+
+      return res()
+    })
+  })
+}
+
+// Unsafe so could returns paths that does not exist anymore
+const actorImagePathUnsafeCache = new LRUCache<string, string>({ max: LRU_CACHE.ACTOR_IMAGE_STATIC.MAX_SIZE })
+
+export {
+  actorImagePathUnsafeCache,
+  updateLocalActorImageFile,
+  deleteLocalActorImageFile,
+  pushActorImageProcessInQueue,
+  buildActorInstance
+}