1 files changed, 235 insertions, 0 deletions

diff --git a/server/lib/notifier.ts b/server/lib/notifier.ts
new file mode 100644
index 000000000..a21b50b2d
--- /dev/null
+++ b/server/lib/notifier.ts
@@ -0,0 +1,235 @@
+import { UserNotificationSettingValue, UserNotificationType, UserRight } from '../../shared/models/users'
+import { logger } from '../helpers/logger'
+import { VideoModel } from '../models/video/video'
+import { Emailer } from './emailer'
+import { UserNotificationModel } from '../models/account/user-notification'
+import { VideoCommentModel } from '../models/video/video-comment'
+import { UserModel } from '../models/account/user'
+import { PeerTubeSocket } from './peertube-socket'
+import { CONFIG } from '../initializers/constants'
+import { VideoPrivacy, VideoState } from '../../shared/models/videos'
+import { VideoAbuseModel } from '../models/video/video-abuse'
+import { VideoBlacklistModel } from '../models/video/video-blacklist'
+import * as Bluebird from 'bluebird'
+
+class Notifier {
+
+  private static instance: Notifier
+
+  private constructor () {}
+
+  notifyOnNewVideo (video: VideoModel): void {
+    // Only notify on public and published videos
+    if (video.privacy !== VideoPrivacy.PUBLIC || video.state !== VideoState.PUBLISHED) return
+
+    this.notifySubscribersOfNewVideo(video)
+      .catch(err => logger.error('Cannot notify subscribers of new video %s.', video.url, { err }))
+  }
+
+  notifyOnNewComment (comment: VideoCommentModel): void {
+    this.notifyVideoOwnerOfNewComment(comment)
+        .catch(err => logger.error('Cannot notify of new comment %s.', comment.url, { err }))
+  }
+
+  notifyOnNewVideoAbuse (videoAbuse: VideoAbuseModel): void {
+    this.notifyModeratorsOfNewVideoAbuse(videoAbuse)
+      .catch(err => logger.error('Cannot notify of new video abuse of video %s.', videoAbuse.Video.url, { err }))
+  }
+
+  notifyOnVideoBlacklist (videoBlacklist: VideoBlacklistModel): void {
+    this.notifyVideoOwnerOfBlacklist(videoBlacklist)
+      .catch(err => logger.error('Cannot notify video owner of new video blacklist of %s.', videoBlacklist.Video.url, { err }))
+  }
+
+  notifyOnVideoUnblacklist (video: VideoModel): void {
+    this.notifyVideoOwnerOfUnblacklist(video)
+        .catch(err => logger.error('Cannot notify video owner of new video blacklist of %s.', video.url, { err }))
+  }
+
+  private async notifySubscribersOfNewVideo (video: VideoModel) {
+    // List all followers that are users
+    const users = await UserModel.listUserSubscribersOf(video.VideoChannel.actorId)
+
+    logger.info('Notifying %d users of new video %s.', users.length, video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newVideoFromSubscription
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_VIDEO_FROM_SUBSCRIPTION,
+        userId: user.id,
+        videoId: video.id
+      })
+      notification.Video = video
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewVideoFromSubscriberNotification(emails, video)
+    }
+
+    return this.notify({ users, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyVideoOwnerOfNewComment (comment: VideoCommentModel) {
+    const user = await UserModel.loadByVideoId(comment.videoId)
+
+    // Not our user or user comments its own video
+    if (!user || comment.Account.userId === user.id) return
+
+    logger.info('Notifying user %s of new comment %s.', user.username, comment.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newCommentOnMyVideo
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_COMMENT_ON_MY_VIDEO,
+        userId: user.id,
+        commentId: comment.id
+      })
+      notification.Comment = comment
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewCommentOnMyVideoNotification(emails, comment)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyModeratorsOfNewVideoAbuse (videoAbuse: VideoAbuseModel) {
+    const users = await UserModel.listWithRight(UserRight.MANAGE_VIDEO_ABUSES)
+    if (users.length === 0) return
+
+    logger.info('Notifying %s user/moderators of new video abuse %s.', users.length, videoAbuse.Video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.videoAbuseAsModerator
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_VIDEO_ABUSE_FOR_MODERATORS,
+        userId: user.id,
+        videoAbuseId: videoAbuse.id
+      })
+      notification.VideoAbuse = videoAbuse
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addVideoAbuseModeratorsNotification(emails, videoAbuse)
+    }
+
+    return this.notify({ users, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyVideoOwnerOfBlacklist (videoBlacklist: VideoBlacklistModel) {
+    const user = await UserModel.loadByVideoId(videoBlacklist.videoId)
+    if (!user) return
+
+    logger.info('Notifying user %s that its video %s has been blacklisted.', user.username, videoBlacklist.Video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.blacklistOnMyVideo
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.BLACKLIST_ON_MY_VIDEO,
+        userId: user.id,
+        videoBlacklistId: videoBlacklist.id
+      })
+      notification.VideoBlacklist = videoBlacklist
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addVideoBlacklistNotification(emails, videoBlacklist)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyVideoOwnerOfUnblacklist (video: VideoModel) {
+    const user = await UserModel.loadByVideoId(video.id)
+    if (!user) return
+
+    logger.info('Notifying user %s that its video %s has been unblacklisted.', user.username, video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.blacklistOnMyVideo
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.UNBLACKLIST_ON_MY_VIDEO,
+        userId: user.id,
+        videoId: video.id
+      })
+      notification.Video = video
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addVideoUnblacklistNotification(emails, video)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notify (options: {
+    users: UserModel[],
+    notificationCreator: (user: UserModel) => Promise<UserNotificationModel>,
+    emailSender: (emails: string[]) => Promise<any> | Bluebird<any>,
+    settingGetter: (user: UserModel) => UserNotificationSettingValue
+  }) {
+    const emails: string[] = []
+
+    for (const user of options.users) {
+      if (this.isWebNotificationEnabled(options.settingGetter(user))) {
+        const notification = await options.notificationCreator(user)
+
+        PeerTubeSocket.Instance.sendNotification(user.id, notification)
+      }
+
+      if (this.isEmailEnabled(user, options.settingGetter(user))) {
+        emails.push(user.email)
+      }
+    }
+
+    if (emails.length !== 0) {
+      await options.emailSender(emails)
+    }
+  }
+
+  private isEmailEnabled (user: UserModel, value: UserNotificationSettingValue) {
+    if (CONFIG.SIGNUP.REQUIRES_EMAIL_VERIFICATION === true && user.emailVerified !== true) return false
+
+    return value === UserNotificationSettingValue.EMAIL || value === UserNotificationSettingValue.WEB_NOTIFICATION_AND_EMAIL
+  }
+
+  private isWebNotificationEnabled (value: UserNotificationSettingValue) {
+    return value === UserNotificationSettingValue.WEB_NOTIFICATION || value === UserNotificationSettingValue.WEB_NOTIFICATION_AND_EMAIL
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  Notifier
+}