7 files changed, 131 insertions, 3 deletions

diff --git a/server/lib/activitypub/fetch.ts b/server/lib/activitypub/fetch.ts
new file mode 100644
index 000000000..fd2af0761
--- /dev/null
+++ b/server/lib/activitypub/fetch.ts
@@ -0,0 +1,15 @@
+import { Transaction } from 'sequelize'
+import { AccountInstance } from '../../models/account/account-interface'
+import { activitypubHttpJobScheduler, ActivityPubHttpPayload } from '../jobs/activitypub-http-job-scheduler/activitypub-http-job-scheduler'
+
+async function addFetchOutboxJob (account: AccountInstance, t: Transaction) {
+  const jobPayload: ActivityPubHttpPayload = {
+    uris: [ account.outboxUrl ]
+  }
+
+  return activitypubHttpJobScheduler.createJob(t, 'activitypubHttpFetcherHandler', jobPayload)
+}
+
+export {
+  addFetchOutboxJob
+}
diff --git a/server/lib/activitypub/index.ts b/server/lib/activitypub/index.ts
index b1daa70bb..fcea662a6 100644
--- a/server/lib/activitypub/index.ts
+++ b/server/lib/activitypub/index.ts
@@ -1,6 +1,7 @@
 export * from './process'
 export * from './send'
 export * from './account'
+export * from './fetch'
 export * from './share'
 export * from './video-channels'
 export * from './videos'
diff --git a/server/lib/activitypub/process/index.ts b/server/lib/activitypub/process/index.ts
index e80b46b6f..c68312053 100644
--- a/server/lib/activitypub/process/index.ts
+++ b/server/lib/activitypub/process/index.ts
@@ -1,3 +1,4 @@
+export * from './process'
 export * from './process-accept'
 export * from './process-add'
 export * from './process-announce'
diff --git a/server/lib/activitypub/process/process.ts b/server/lib/activitypub/process/process.ts
new file mode 100644
index 000000000..613597341
--- /dev/null
+++ b/server/lib/activitypub/process/process.ts
@@ -0,0 +1,38 @@
+import { Activity, ActivityType } from '../../../../shared/models/activitypub/activity'
+import { AccountInstance } from '../../../models/account/account-interface'
+import { processAcceptActivity } from './process-accept'
+import { processAddActivity } from './process-add'
+import { processAnnounceActivity } from './process-announce'
+import { processCreateActivity } from './process-create'
+import { processDeleteActivity } from './process-delete'
+import { processFollowActivity } from './process-follow'
+import { processUndoActivity } from './process-undo'
+import { processUpdateActivity } from './process-update'
+import { logger } from '../../../helpers/logger'
+
+const processActivity: { [ P in ActivityType ]: (activity: Activity, inboxAccount?: AccountInstance) => Promise<any> } = {
+  Create: processCreateActivity,
+  Add: processAddActivity,
+  Update: processUpdateActivity,
+  Delete: processDeleteActivity,
+  Follow: processFollowActivity,
+  Accept: processAcceptActivity,
+  Announce: processAnnounceActivity,
+  Undo: processUndoActivity
+}
+
+async function processActivities (activities: Activity[], inboxAccount?: AccountInstance) {
+  for (const activity of activities) {
+    const activityProcessor = processActivity[activity.type]
+    if (activityProcessor === undefined) {
+      logger.warn('Unknown activity type %s.', activity.type, { activityId: activity.id })
+      continue
+    }
+
+    await activityProcessor(activity, inboxAccount)
+  }
+}
+
+export {
+  processActivities
+}
diff --git a/server/lib/activitypub/send/send-create.ts b/server/lib/activitypub/send/send-create.ts
index 14b666fc9..df8e0a642 100644
--- a/server/lib/activitypub/send/send-create.ts
+++ b/server/lib/activitypub/send/send-create.ts
@@ -21,6 +21,8 @@ async function sendVideoAbuse (byAccount: AccountInstance, videoAbuse: VideoAbus
   return unicastTo(data, byAccount, video.VideoChannel.Account.sharedInboxUrl, t)
 }
 
+// async function sendCreateView ()
+
 async function createActivityData (url: string, byAccount: AccountInstance, object: any) {
   const { to, cc } = await getAudience(byAccount)
   const activity: ActivityCreate = {
diff --git a/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-fetcher-handler.ts b/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-fetcher-handler.ts
new file mode 100644
index 000000000..b8ead32a4
--- /dev/null
+++ b/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-fetcher-handler.ts
@@ -0,0 +1,69 @@
+import { logger } from '../../../helpers'
+import { buildSignedActivity } from '../../../helpers/activitypub'
+import { doRequest } from '../../../helpers/requests'
+import { database as db } from '../../../initializers'
+import { ActivityPubHttpPayload } from './activitypub-http-job-scheduler'
+import { processActivities } from '../../activitypub/process/process'
+import { ACTIVITY_PUB } from '../../../initializers/constants'
+
+async function process (payload: ActivityPubHttpPayload, jobId: number) {
+  logger.info('Processing ActivityPub fetcher in job %d.', jobId)
+
+  const options = {
+    method: 'GET',
+    uri: '',
+    json: true
+  }
+
+  for (const uri of payload.uris) {
+    options.uri = uri
+    logger.info('Fetching ActivityPub data on %s.', uri)
+
+    const response = await doRequest(options)
+    const firstBody = response.body
+
+    if (firstBody.first && Array.isArray(firstBody.first.orderedItems)) {
+      const activities = firstBody.first.orderedItems
+
+      logger.info('Processing %i items ActivityPub fetcher for %s.', activities.length, uri)
+
+      await processActivities(activities)
+    }
+
+    let limit = ACTIVITY_PUB.FETCH_PAGE_LIMIT
+    let i = 0
+    let nextLink = firstBody.first.next
+    while (nextLink && i < limit) {
+      options.uri = nextLink
+
+      const { body } = await doRequest(options)
+      nextLink = body.nextLink
+      i++
+
+      if (Array.isArray(body.orderedItems)) {
+        const activities = body.orderedItems
+        logger.info('Processing %i items ActivityPub fetcher for %s.', activities.length, uri)
+
+        await processActivities(activities)
+      }
+    }
+  }
+}
+
+function onError (err: Error, jobId: number) {
+  logger.error('Error when broadcasting ActivityPub request in job %d.', jobId, err)
+  return Promise.resolve()
+}
+
+function onSuccess (jobId: number) {
+  logger.info('Job %d is a success.', jobId)
+  return Promise.resolve()
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  process,
+  onError,
+  onSuccess
+}
diff --git a/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-job-scheduler.ts b/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-job-scheduler.ts
index e4f6c94a5..aef217ce7 100644
--- a/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-job-scheduler.ts
+++ b/server/lib/jobs/activitypub-http-job-scheduler/activitypub-http-job-scheduler.ts
@@ -2,16 +2,18 @@ import { JobScheduler, JobHandler } from '../job-scheduler'
 
 import * as activitypubHttpBroadcastHandler from './activitypub-http-broadcast-handler'
 import * as activitypubHttpUnicastHandler from './activitypub-http-unicast-handler'
+import * as activitypubHttpFetcherHandler from './activitypub-http-fetcher-handler'
 import { JobCategory } from '../../../../shared'
 
 type ActivityPubHttpPayload = {
   uris: string[]
-  signatureAccountId: number
-  body: any
+  signatureAccountId?: number
+  body?: any
 }
 const jobHandlers: { [ handlerName: string ]: JobHandler<ActivityPubHttpPayload, void> } = {
   activitypubHttpBroadcastHandler,
-  activitypubHttpUnicastHandler
+  activitypubHttpUnicastHandler,
+  activitypubHttpFetcherHandler
 }
 const jobCategory: JobCategory = 'activitypub-http'