6 files changed, 235 insertions, 17 deletions

diff --git a/server/lib/activitypub/process/process-accept.ts b/server/lib/activitypub/process/process-accept.ts
index 89bda9c32..605705ad3 100644
--- a/server/lib/activitypub/process/process-accept.ts
+++ b/server/lib/activitypub/process/process-accept.ts
@@ -2,6 +2,7 @@ import { ActivityAccept } from '../../../../shared/models/activitypub'
 import { ActorModel } from '../../../models/activitypub/actor'
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { addFetchOutboxJob } from '../actor'
+import { Notifier } from '../../notifier'
 
 async function processAcceptActivity (activity: ActivityAccept, targetActor: ActorModel, inboxActor?: ActorModel) {
   if (inboxActor === undefined) throw new Error('Need to accept on explicit inbox.')
@@ -24,6 +25,7 @@ async function processAccept (actor: ActorModel, targetActor: ActorModel) {
   if (follow.state !== 'accepted') {
     follow.set('state', 'accepted')
     await follow.save()
+
     await addFetchOutboxJob(targetActor)
   }
 }
diff --git a/server/lib/activitypub/process/process-follow.ts b/server/lib/activitypub/process/process-follow.ts
index 24c9085f7..a67892440 100644
--- a/server/lib/activitypub/process/process-follow.ts
+++ b/server/lib/activitypub/process/process-follow.ts
@@ -5,6 +5,7 @@ import { sequelizeTypescript } from '../../../initializers'
 import { ActorModel } from '../../../models/activitypub/actor'
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { sendAccept } from '../send'
+import { Notifier } from '../../notifier'
 
 async function processFollowActivity (activity: ActivityFollow, byActor: ActorModel) {
   const activityObject = activity.object
@@ -21,13 +22,13 @@ export {
 // ---------------------------------------------------------------------------
 
 async function processFollow (actor: ActorModel, targetActorURL: string) {
-  await sequelizeTypescript.transaction(async t => {
+  const { actorFollow, created } = await sequelizeTypescript.transaction(async t => {
     const targetActor = await ActorModel.loadByUrlAndPopulateAccountAndChannel(targetActorURL, t)
 
     if (!targetActor) throw new Error('Unknown actor')
     if (targetActor.isOwned() === false) throw new Error('This is not a local actor.')
 
-    const [ actorFollow ] = await ActorFollowModel.findOrCreate({
+    const [ actorFollow, created ] = await ActorFollowModel.findOrCreate({
       where: {
         actorId: actor.id,
         targetActorId: targetActor.id
@@ -52,8 +53,12 @@ async function processFollow (actor: ActorModel, targetActorURL: string) {
     actorFollow.ActorFollowing = targetActor
 
     // Target sends to actor he accepted the follow request
-    return sendAccept(actorFollow)
+    await sendAccept(actorFollow)
+
+    return { actorFollow, created }
   })
 
+  if (created) Notifier.Instance.notifyOfNewFollow(actorFollow)
+
   logger.info('Actor %s is followed by actor %s.', targetActorURL, actor.url)
 }
diff --git a/server/lib/emailer.ts b/server/lib/emailer.ts
index 6dc8f2adf..3429498e7 100644
--- a/server/lib/emailer.ts
+++ b/server/lib/emailer.ts
@@ -11,6 +11,7 @@ import { VideoCommentModel } from '../models/video/video-comment'
 import { VideoAbuseModel } from '../models/video/video-abuse'
 import { VideoBlacklistModel } from '../models/video/video-blacklist'
 import { VideoImportModel } from '../models/video/video-import'
+import { ActorFollowModel } from '../models/activitypub/actor-follow'
 
 class Emailer {
 
@@ -103,6 +104,25 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
+  addNewFollowNotification (to: string[], actorFollow: ActorFollowModel, followType: 'account' | 'channel') {
+    const followerName = actorFollow.ActorFollower.Account.getDisplayName()
+    const followingName = (actorFollow.ActorFollowing.VideoChannel || actorFollow.ActorFollowing.Account).getDisplayName()
+
+    const text = `Hi dear user,\n\n` +
+      `Your ${followType} ${followingName} has a new subscriber: ${followerName}` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: 'New follower on your channel ' + followingName,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
   myVideoPublishedNotification (to: string[], video: VideoModel) {
     const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath()
 
@@ -185,7 +205,29 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  async addVideoAbuseModeratorsNotification (to: string[], videoAbuse: VideoAbuseModel) {
+  addNewCommentMentionNotification (to: string[], comment: VideoCommentModel) {
+    const accountName = comment.Account.getDisplayName()
+    const video = comment.Video
+    const commentUrl = CONFIG.WEBSERVER.URL + comment.getCommentStaticPath()
+
+    const text = `Hi dear user,\n\n` +
+      `${accountName} mentioned you on video ${video.name}` +
+      `\n\n` +
+      `You can view the comment on ${commentUrl} ` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: 'Mention on video ' + video.name,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addVideoAbuseModeratorsNotification (to: string[], videoAbuse: VideoAbuseModel) {
     const videoUrl = CONFIG.WEBSERVER.URL + videoAbuse.Video.getWatchStaticPath()
 
     const text = `Hi,\n\n` +
@@ -202,7 +244,22 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  async addVideoBlacklistNotification (to: string[], videoBlacklist: VideoBlacklistModel) {
+  addNewUserRegistrationNotification (to: string[], user: UserModel) {
+    const text = `Hi,\n\n` +
+      `User ${user.username} just registered on ${CONFIG.WEBSERVER.HOST} PeerTube instance.\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: '[PeerTube] New user registration on ' + CONFIG.WEBSERVER.HOST,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addVideoBlacklistNotification (to: string[], videoBlacklist: VideoBlacklistModel) {
     const videoName = videoBlacklist.Video.name
     const videoUrl = CONFIG.WEBSERVER.URL + videoBlacklist.Video.getWatchStaticPath()
 
@@ -224,7 +281,7 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  async addVideoUnblacklistNotification (to: string[], video: VideoModel) {
+  addVideoUnblacklistNotification (to: string[], video: VideoModel) {
     const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath()
 
     const text = 'Hi,\n\n' +
diff --git a/server/lib/job-queue/handlers/activitypub-follow.ts b/server/lib/job-queue/handlers/activitypub-follow.ts
index 36d0f237b..b4d381062 100644
--- a/server/lib/job-queue/handlers/activitypub-follow.ts
+++ b/server/lib/job-queue/handlers/activitypub-follow.ts
@@ -8,6 +8,7 @@ import { getOrCreateActorAndServerAndModel } from '../../activitypub/actor'
 import { retryTransactionWrapper } from '../../../helpers/database-utils'
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { ActorModel } from '../../../models/activitypub/actor'
+import { Notifier } from '../../notifier'
 
 export type ActivitypubFollowPayload = {
   followerActorId: number
@@ -42,7 +43,7 @@ export {
 
 // ---------------------------------------------------------------------------
 
-function follow (fromActor: ActorModel, targetActor: ActorModel) {
+async function follow (fromActor: ActorModel, targetActor: ActorModel) {
   if (fromActor.id === targetActor.id) {
     throw new Error('Follower is the same than target actor.')
   }
@@ -50,7 +51,7 @@ function follow (fromActor: ActorModel, targetActor: ActorModel) {
   // Same server, direct accept
   const state = !fromActor.serverId && !targetActor.serverId ? 'accepted' : 'pending'
 
-  return sequelizeTypescript.transaction(async t => {
+  const actorFollow = await sequelizeTypescript.transaction(async t => {
     const [ actorFollow ] = await ActorFollowModel.findOrCreate({
       where: {
         actorId: fromActor.id,
@@ -68,5 +69,9 @@ function follow (fromActor: ActorModel, targetActor: ActorModel) {
 
     // Send a notification to remote server if our follow is not already accepted
     if (actorFollow.state !== 'accepted') await sendFollow(actorFollow)
+
+    return actorFollow
   })
+
+  if (actorFollow.state === 'accepted') Notifier.Instance.notifyOfNewFollow(actorFollow)
 }
diff --git a/server/lib/notifier.ts b/server/lib/notifier.ts
index 11b0937e9..2c51d7101 100644
--- a/server/lib/notifier.ts
+++ b/server/lib/notifier.ts
@@ -13,6 +13,8 @@ import { VideoBlacklistModel } from '../models/video/video-blacklist'
 import * as Bluebird from 'bluebird'
 import { VideoImportModel } from '../models/video/video-import'
 import { AccountBlocklistModel } from '../models/account/account-blocklist'
+import { ActorFollowModel } from '../models/activitypub/actor-follow'
+import { AccountModel } from '../models/account/account'
 
 class Notifier {
 
@@ -38,7 +40,10 @@ class Notifier {
 
   notifyOnNewComment (comment: VideoCommentModel): void {
     this.notifyVideoOwnerOfNewComment(comment)
-        .catch(err => logger.error('Cannot notify of new comment %s.', comment.url, { err }))
+        .catch(err => logger.error('Cannot notify video owner of new comment %s.', comment.url, { err }))
+
+    this.notifyOfCommentMention(comment)
+        .catch(err => logger.error('Cannot notify mentions of comment %s.', comment.url, { err }))
   }
 
   notifyOnNewVideoAbuse (videoAbuse: VideoAbuseModel): void {
@@ -61,6 +66,23 @@ class Notifier {
       .catch(err => logger.error('Cannot notify owner that its video import %s is finished.', videoImport.getTargetIdentifier(), { err }))
   }
 
+  notifyOnNewUserRegistration (user: UserModel): void {
+    this.notifyModeratorsOfNewUserRegistration(user)
+        .catch(err => logger.error('Cannot notify moderators of new user registration (%s).', user.username, { err }))
+  }
+
+  notifyOfNewFollow (actorFollow: ActorFollowModel): void {
+    this.notifyUserOfNewActorFollow(actorFollow)
+      .catch(err => {
+        logger.error(
+          'Cannot notify owner of channel %s of a new follow by %s.',
+          actorFollow.ActorFollowing.VideoChannel.getDisplayName(),
+          actorFollow.ActorFollower.Account.getDisplayName(),
+          err
+        )
+      })
+  }
+
   private async notifySubscribersOfNewVideo (video: VideoModel) {
     // List all followers that are users
     const users = await UserModel.listUserSubscribersOf(video.VideoChannel.actorId)
@@ -90,6 +112,8 @@ class Notifier {
   }
 
   private async notifyVideoOwnerOfNewComment (comment: VideoCommentModel) {
+    if (comment.Video.isOwned() === false) return
+
     const user = await UserModel.loadByVideoId(comment.videoId)
 
     // Not our user or user comments its own video
@@ -122,11 +146,100 @@ class Notifier {
     return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
   }
 
-  private async notifyModeratorsOfNewVideoAbuse (videoAbuse: VideoAbuseModel) {
-    const users = await UserModel.listWithRight(UserRight.MANAGE_VIDEO_ABUSES)
+  private async notifyOfCommentMention (comment: VideoCommentModel) {
+    const usernames = comment.extractMentions()
+    let users = await UserModel.listByUsernames(usernames)
+
+    if (comment.Video.isOwned()) {
+      const userException = await UserModel.loadByVideoId(comment.videoId)
+      users = users.filter(u => u.id !== userException.id)
+    }
+
+    // Don't notify if I mentioned myself
+    users = users.filter(u => u.Account.id !== comment.accountId)
+
     if (users.length === 0) return
 
-    logger.info('Notifying %s user/moderators of new video abuse %s.', users.length, videoAbuse.Video.url)
+    const accountMutedHash = await AccountBlocklistModel.isAccountMutedByMulti(users.map(u => u.Account.id), comment.accountId)
+
+    logger.info('Notifying %d users of new comment %s.', users.length, comment.url)
+
+    function settingGetter (user: UserModel) {
+      if (accountMutedHash[user.Account.id] === true) return UserNotificationSettingValue.NONE
+
+      return user.NotificationSetting.commentMention
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.COMMENT_MENTION,
+        userId: user.id,
+        commentId: comment.id
+      })
+      notification.Comment = comment
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewCommentMentionNotification(emails, comment)
+    }
+
+    return this.notify({ users, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyUserOfNewActorFollow (actorFollow: ActorFollowModel) {
+    if (actorFollow.ActorFollowing.isOwned() === false) return
+
+    // Account follows one of our account?
+    let followType: 'account' | 'channel' = 'channel'
+    let user = await UserModel.loadByChannelActorId(actorFollow.ActorFollowing.id)
+
+    // Account follows one of our channel?
+    if (!user) {
+      user = await UserModel.loadByAccountActorId(actorFollow.ActorFollowing.id)
+      followType = 'account'
+    }
+
+    if (!user) return
+
+    if (!actorFollow.ActorFollower.Account || !actorFollow.ActorFollower.Account.name) {
+      actorFollow.ActorFollower.Account = await actorFollow.ActorFollower.$get('Account') as AccountModel
+    }
+    const followerAccount = actorFollow.ActorFollower.Account
+
+    const accountMuted = await AccountBlocklistModel.isAccountMutedBy(user.Account.id, followerAccount.id)
+    if (accountMuted) return
+
+    logger.info('Notifying user %s of new follower: %s.', user.username, followerAccount.getDisplayName())
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newFollow
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_FOLLOW,
+        userId: user.id,
+        actorFollowId: actorFollow.id
+      })
+      notification.ActorFollow = actorFollow
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewFollowNotification(emails, actorFollow, followType)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyModeratorsOfNewVideoAbuse (videoAbuse: VideoAbuseModel) {
+    const moderators = await UserModel.listWithRight(UserRight.MANAGE_VIDEO_ABUSES)
+    if (moderators.length === 0) return
+
+    logger.info('Notifying %s user/moderators of new video abuse %s.', moderators.length, videoAbuse.Video.url)
 
     function settingGetter (user: UserModel) {
       return user.NotificationSetting.videoAbuseAsModerator
@@ -147,7 +260,7 @@ class Notifier {
       return Emailer.Instance.addVideoAbuseModeratorsNotification(emails, videoAbuse)
     }
 
-    return this.notify({ users, settingGetter, notificationCreator, emailSender })
+    return this.notify({ users: moderators, settingGetter, notificationCreator, emailSender })
   }
 
   private async notifyVideoOwnerOfBlacklist (videoBlacklist: VideoBlacklistModel) {
@@ -264,6 +377,37 @@ class Notifier {
     return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
   }
 
+  private async notifyModeratorsOfNewUserRegistration (registeredUser: UserModel) {
+    const moderators = await UserModel.listWithRight(UserRight.MANAGE_USERS)
+    if (moderators.length === 0) return
+
+    logger.info(
+      'Notifying %s moderators of new user registration of %s.',
+      moderators.length, registeredUser.Account.Actor.preferredUsername
+    )
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newUserRegistration
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_USER_REGISTRATION,
+        userId: user.id,
+        accountId: registeredUser.Account.id
+      })
+      notification.Account = registeredUser.Account
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewUserRegistrationNotification(emails, registeredUser)
+    }
+
+    return this.notify({ users: moderators, settingGetter, notificationCreator, emailSender })
+  }
+
   private async notify (options: {
     users: UserModel[],
     notificationCreator: (user: UserModel) => Promise<UserNotificationModel>,
diff --git a/server/lib/user.ts b/server/lib/user.ts
index 481571828..9e24e85a0 100644
--- a/server/lib/user.ts
+++ b/server/lib/user.ts
@@ -10,7 +10,7 @@ import { VideoChannelModel } from '../models/video/video-channel'
 import { FilteredModelAttributes } from 'sequelize-typescript/lib/models/Model'
 import { ActorModel } from '../models/activitypub/actor'
 import { UserNotificationSettingModel } from '../models/account/user-notification-setting'
-import { UserNotificationSettingValue } from '../../shared/models/users'
+import { UserNotificationSetting, UserNotificationSettingValue } from '../../shared/models/users'
 
 async function createUserAccountAndChannel (userToCreate: UserModel, validateUser = true) {
   const { user, account, videoChannel } = await sequelizeTypescript.transaction(async t => {
@@ -96,13 +96,18 @@ export {
 // ---------------------------------------------------------------------------
 
 function createDefaultUserNotificationSettings (user: UserModel, t: Sequelize.Transaction | undefined) {
-  return UserNotificationSettingModel.create({
+  const values: UserNotificationSetting & { userId: number } = {
     userId: user.id,
     newVideoFromSubscription: UserNotificationSettingValue.WEB_NOTIFICATION,
     newCommentOnMyVideo: UserNotificationSettingValue.WEB_NOTIFICATION,
     myVideoImportFinished: UserNotificationSettingValue.WEB_NOTIFICATION,
     myVideoPublished: UserNotificationSettingValue.WEB_NOTIFICATION,
     videoAbuseAsModerator: UserNotificationSettingValue.WEB_NOTIFICATION_AND_EMAIL,
-    blacklistOnMyVideo: UserNotificationSettingValue.WEB_NOTIFICATION_AND_EMAIL
-  }, { transaction: t })
+    blacklistOnMyVideo: UserNotificationSettingValue.WEB_NOTIFICATION_AND_EMAIL,
+    newUserRegistration: UserNotificationSettingValue.WEB_NOTIFICATION,
+    commentMention: UserNotificationSettingValue.WEB_NOTIFICATION,
+    newFollow: UserNotificationSettingValue.WEB_NOTIFICATION
+  }
+
+  return UserNotificationSettingModel.create(values, { transaction: t })
 }