Federate likes/dislikes

5 files changed, 177 insertions, 14 deletions

diff --git a/server/lib/activitypub/process/index.ts b/server/lib/activitypub/process/index.ts
index c68312053..e25c261cc 100644
--- a/server/lib/activitypub/process/index.ts
+++ b/server/lib/activitypub/process/index.ts
@@ -5,5 +5,6 @@ export * from './process-announce'
 export * from './process-create'
 export * from './process-delete'
 export * from './process-follow'
+export * from './process-like'
 export * from './process-undo'
 export * from './process-update'
diff --git a/server/lib/activitypub/process/process-create.ts b/server/lib/activitypub/process/process-create.ts
index 1777733a0..147bbd132 100644
--- a/server/lib/activitypub/process/process-create.ts
+++ b/server/lib/activitypub/process/process-create.ts
@@ -5,9 +5,10 @@ import { logger, retryTransactionWrapper } from '../../../helpers'
 import { database as db } from '../../../initializers'
 import { AccountInstance } from '../../../models/account/account-interface'
 import { getOrCreateAccountAndServer } from '../account'
-import { sendCreateViewToVideoFollowers } from '../send/send-create'
+import { sendCreateDislikeToVideoFollowers, sendCreateViewToVideoFollowers } from '../send/send-create'
 import { getVideoChannelActivityPubUrl } from '../url'
 import { videoChannelActivityObjectToDBAttributes } from './misc'
+import { DislikeObject } from '../../../../shared/models/activitypub/objects/dislike-object'
 
 async function processCreateActivity (activity: ActivityCreate) {
   const activityObject = activity.object
@@ -16,6 +17,8 @@ async function processCreateActivity (activity: ActivityCreate) {
 
   if (activityType === 'View') {
     return processCreateView(activityObject as ViewObject)
+  } else if (activityType === 'Dislike') {
+    return processCreateDislike(account, activityObject as DislikeObject)
   } else if (activityType === 'VideoChannel') {
     return processCreateVideoChannel(account, activityObject as VideoChannelObject)
   } else if (activityType === 'Flag') {
@@ -34,6 +37,36 @@ export {
 
 // ---------------------------------------------------------------------------
 
+async function processCreateDislike (byAccount: AccountInstance, dislike: DislikeObject) {
+  const options = {
+    arguments: [ byAccount, dislike ],
+    errorMessage: 'Cannot dislike the video with many retries.'
+  }
+
+  return retryTransactionWrapper(createVideoDislike, options)
+}
+
+function createVideoDislike (byAccount: AccountInstance, dislike: DislikeObject) {
+  return db.sequelize.transaction(async t => {
+    const video = await db.Video.loadByUrlAndPopulateAccount(dislike.object)
+
+    if (!video) throw new Error('Unknown video ' + dislike.object)
+
+    const rate = {
+      type: 'dislike' as 'dislike',
+      videoId: video.id,
+      accountId: byAccount.id
+    }
+    const [ , created ] = await db.AccountVideoRate.findOrCreate({
+      where: rate,
+      defaults: rate
+    })
+    await video.increment('dislikes')
+
+    if (video.isOwned() && created === true) await sendCreateDislikeToVideoFollowers(byAccount, video, undefined)
+  })
+}
+
 async function processCreateView (view: ViewObject) {
   const video = await db.Video.loadByUrlAndPopulateAccount(view.object)
 
diff --git a/server/lib/activitypub/process/process-like.ts b/server/lib/activitypub/process/process-like.ts
new file mode 100644
index 000000000..d77b30f24
--- /dev/null
+++ b/server/lib/activitypub/process/process-like.ts
@@ -0,0 +1,50 @@
+import { ActivityLike } from '../../../../shared/models/activitypub/activity'
+import { database as db } from '../../../initializers'
+import { AccountInstance } from '../../../models/account/account-interface'
+import { getOrCreateAccountAndServer } from '../account'
+import { sendLikeToVideoFollowers } from '../send/send-like'
+import { retryTransactionWrapper } from '../../../helpers/database-utils'
+
+async function processLikeActivity (activity: ActivityLike) {
+  const account = await getOrCreateAccountAndServer(activity.actor)
+
+  return processLikeVideo(account, activity.object)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  processLikeActivity
+}
+
+// ---------------------------------------------------------------------------
+
+async function processLikeVideo (byAccount: AccountInstance, videoUrl: string) {
+  const options = {
+    arguments: [ byAccount, videoUrl ],
+    errorMessage: 'Cannot like the video with many retries.'
+  }
+
+  return retryTransactionWrapper(createVideoLike, options)
+}
+
+function createVideoLike (byAccount: AccountInstance, videoUrl: string) {
+  return db.sequelize.transaction(async t => {
+    const video = await db.Video.loadByUrlAndPopulateAccount(videoUrl)
+
+    if (!video) throw new Error('Unknown video ' + videoUrl)
+
+    const rate = {
+      type: 'like' as 'like',
+      videoId: video.id,
+      accountId: byAccount.id
+    }
+    const [ , created ] = await db.AccountVideoRate.findOrCreate({
+      where: rate,
+      defaults: rate
+    })
+    await video.increment('likes')
+
+    if (video.isOwned() && created === true) await sendLikeToVideoFollowers(byAccount, video, undefined)
+  })
+}
diff --git a/server/lib/activitypub/process/process-undo.ts b/server/lib/activitypub/process/process-undo.ts
index 610b800fb..caa835714 100644
--- a/server/lib/activitypub/process/process-undo.ts
+++ b/server/lib/activitypub/process/process-undo.ts
@@ -1,20 +1,20 @@
-import { ActivityUndo } from '../../../../shared/models/activitypub/activity'
+import { ActivityCreate, ActivityFollow, ActivityLike, ActivityUndo } from '../../../../shared/models/activitypub/activity'
 import { logger } from '../../../helpers/logger'
 import { database as db } from '../../../initializers'
+import { retryTransactionWrapper } from '../../../helpers/database-utils'
+import { DislikeObject } from '../../../../shared/models/activitypub/objects/dislike-object'
+import { sendUndoLikeToVideoFollowers } from '../send/send-undo'
+import { sendUndoDislikeToVideoFollowers } from '../index'
 
 async function processUndoActivity (activity: ActivityUndo) {
   const activityToUndo = activity.object
 
-  if (activityToUndo.type === 'Follow') {
-    const follower = await db.Account.loadByUrl(activity.actor)
-    const following = await db.Account.loadByUrl(activityToUndo.object)
-    const accountFollow = await db.AccountFollow.loadByAccountAndTarget(follower.id, following.id)
-
-    if (!accountFollow) throw new Error(`'Unknown account follow ${follower.id} -> ${following.id}.`)
-
-    await accountFollow.destroy()
-
-    return undefined
+  if (activityToUndo.type === 'Like') {
+    return processUndoLike(activity.actor, activityToUndo)
+  } else if (activityToUndo.type === 'Create' && activityToUndo.object.type === 'Dislike') {
+    return processUndoDislike(activity.actor, activityToUndo.object)
+  } else if (activityToUndo.type === 'Follow') {
+    return processUndoFollow(activity.actor, activityToUndo)
   }
 
   logger.warn('Unknown activity object type %s -> %s when undo activity.', activityToUndo.type, { activity: activity.id })
@@ -29,3 +29,80 @@ export {
 }
 
 // ---------------------------------------------------------------------------
+
+function processUndoLike (actor: string, likeActivity: ActivityLike) {
+  const options = {
+    arguments: [ actor, likeActivity ],
+    errorMessage: 'Cannot undo like with many retries.'
+  }
+
+  return retryTransactionWrapper(undoLike, options)
+}
+
+function undoLike (actor: string, likeActivity: ActivityLike) {
+  return db.sequelize.transaction(async t => {
+    const byAccount = await db.Account.loadByUrl(actor, t)
+    if (!byAccount) throw new Error('Unknown account ' + actor)
+
+    const video = await db.Video.loadByUrlAndPopulateAccount(likeActivity.object)
+    if (!video) throw new Error('Unknown video ' + likeActivity.actor)
+
+    const rate = await db.AccountVideoRate.load(byAccount.id, video.id, t)
+    if (!rate) throw new Error(`Unknown rate by account ${byAccount.id} for video ${video.id}.`)
+
+    await rate.destroy({ transaction: t })
+    await video.decrement('likes')
+
+    if (video.isOwned()) await sendUndoLikeToVideoFollowers(byAccount, video, t)
+  })
+}
+
+function processUndoDislike (actor: string, dislikeCreateActivity: DislikeObject) {
+  const options = {
+    arguments: [ actor, dislikeCreateActivity ],
+    errorMessage: 'Cannot undo dislike with many retries.'
+  }
+
+  return retryTransactionWrapper(undoDislike, options)
+}
+
+function undoDislike (actor: string, dislike: DislikeObject) {
+  return db.sequelize.transaction(async t => {
+    const byAccount = await db.Account.loadByUrl(actor, t)
+    if (!byAccount) throw new Error('Unknown account ' + actor)
+
+    const video = await db.Video.loadByUrlAndPopulateAccount(dislike.object)
+    if (!video) throw new Error('Unknown video ' + dislike.actor)
+
+    const rate = await db.AccountVideoRate.load(byAccount.id, video.id, t)
+    if (!rate) throw new Error(`Unknown rate by account ${byAccount.id} for video ${video.id}.`)
+
+    await rate.destroy({ transaction: t })
+    await video.decrement('dislikes')
+
+    if (video.isOwned()) await sendUndoDislikeToVideoFollowers(byAccount, video, t)
+  })
+}
+
+function processUndoFollow (actor: string, followActivity: ActivityFollow) {
+  const options = {
+    arguments: [ actor, followActivity ],
+    errorMessage: 'Cannot undo follow with many retries.'
+  }
+
+  return retryTransactionWrapper(undoFollow, options)
+}
+
+function undoFollow (actor: string, followActivity: ActivityFollow) {
+  return db.sequelize.transaction(async t => {
+    const follower = await db.Account.loadByUrl(actor, t)
+    const following = await db.Account.loadByUrl(followActivity.object, t)
+    const accountFollow = await db.AccountFollow.loadByAccountAndTarget(follower.id, following.id, t)
+
+    if (!accountFollow) throw new Error(`'Unknown account follow ${follower.id} -> ${following.id}.`)
+
+    await accountFollow.destroy({ transaction: t })
+
+    return undefined
+  })
+}
diff --git a/server/lib/activitypub/process/process.ts b/server/lib/activitypub/process/process.ts
index 613597341..942bce0e6 100644
--- a/server/lib/activitypub/process/process.ts
+++ b/server/lib/activitypub/process/process.ts
@@ -1,4 +1,5 @@
 import { Activity, ActivityType } from '../../../../shared/models/activitypub/activity'
+import { logger } from '../../../helpers/logger'
 import { AccountInstance } from '../../../models/account/account-interface'
 import { processAcceptActivity } from './process-accept'
 import { processAddActivity } from './process-add'
@@ -6,9 +7,9 @@ import { processAnnounceActivity } from './process-announce'
 import { processCreateActivity } from './process-create'
 import { processDeleteActivity } from './process-delete'
 import { processFollowActivity } from './process-follow'
+import { processLikeActivity } from './process-like'
 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,
@@ -18,7 +19,8 @@ const processActivity: { [ P in ActivityType ]: (activity: Activity, inboxAccoun
   Follow: processFollowActivity,
   Accept: processAcceptActivity,
   Announce: processAnnounceActivity,
-  Undo: processUndoActivity
+  Undo: processUndoActivity,
+  Like: processLikeActivity
 }
 
 async function processActivities (activities: Activity[], inboxAccount?: AccountInstance) {