Adding unified streamable notifications

app/channels/application_cable/channel.rb

@@ -10,7 +10,7 @@ module ApplicationCable
       return [nil, message] if message['type'] == 'delete'
 
       status             = Status.find_by(id: message['id'])
-      message['message'] = FeedManager.instance.inline_render(current_user.account, status)
+      message['message'] = FeedManager.instance.inline_render(current_user.account, 'api/v1/statuses/show', status)
 
       [status, message]
     end

app/controllers/api/v1/notifications_controller.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class Api::V1::NotificationsController < ApiController
+  before_action -> { doorkeeper_authorize! :read }
+  before_action :require_user!
+
+  respond_to :json
+
+  def index
+    @notifications = Notification.where(account: current_account).with_includes.paginate_by_max_id(20, params[:max_id], params[:since_id])
+
+    next_path = api_v1_notifications_url(max_id: @notifications.last.id)    if @notifications.size == 20
+    prev_path = api_v1_notifications_url(since_id: @notifications.first.id) unless @notifications.empty?
+
+    set_pagination_headers(next_path, prev_path)
+  end
+end

app/lib/feed_manager.rb

@@ -26,7 +26,7 @@ class FeedManager
   def push(timeline_type, account, status)
     redis.zadd(key(timeline_type, account.id), status.id, status.reblog? ? status.reblog_of_id : status.id)
     trim(timeline_type, account.id)
-    broadcast(account.id, type: 'update', timeline: timeline_type, message: inline_render(account, status))
+    broadcast(account.id, type: 'update', timeline: timeline_type, message: inline_render(account, 'api/v1/statuses/show', status))
   end
 
   def broadcast(timeline_id, options = {})
@@ -39,7 +39,7 @@ class FeedManager
     redis.zremrangebyscore(key(type, account_id), '-inf', "(#{last.last}")
   end
 
-  def inline_render(target_account, status)
+  def inline_render(target_account, template, object)
     rabl_scope = Class.new do
       include RoutingHelper
 
@@ -56,7 +56,7 @@ class FeedManager
       end
     end
 
-    Rabl::Renderer.new('api/v1/statuses/show', status, view_path: 'app/views', format: :json, scope: rabl_scope.new(target_account)).render
+    Rabl::Renderer.new(template, object, view_path: 'app/views', format: :json, scope: rabl_scope.new(target_account)).render
   end
 
   private

app/mailers/notification_mailer.rb

@@ -3,46 +3,38 @@
 class NotificationMailer < ApplicationMailer
   helper StreamEntriesHelper
 
-  def mention(mentioned_account, status)
-    @me     = mentioned_account
-    @status = status
-
-    return unless @me.user.settings(:notification_emails).mention
+  def mention(recipient, notification)
+    @me     = recipient
+    @status = notification.target_status
 
     I18n.with_locale(@me.user.locale || I18n.default_locale) do
       mail to: @me.user.email, subject: I18n.t('notification_mailer.mention.subject', name: @status.account.acct)
     end
   end
 
-  def follow(followed_account, follower)
-    @me      = followed_account
-    @account = follower
-
-    return unless @me.user.settings(:notification_emails).follow
+  def follow(recipient, notification)
+    @me      = recipient
+    @account = notification.from_account
 
     I18n.with_locale(@me.user.locale || I18n.default_locale) do
       mail to: @me.user.email, subject: I18n.t('notification_mailer.follow.subject', name: @account.acct)
     end
   end
 
-  def favourite(target_status, from_account)
-    @me      = target_status.account
-    @account = from_account
-    @status  = target_status
-
-    return unless @me.user.settings(:notification_emails).favourite
+  def favourite(recipient, notification)
+    @me      = recipient
+    @account = notification.from_account
+    @status  = notification.target_status
 
     I18n.with_locale(@me.user.locale || I18n.default_locale) do
       mail to: @me.user.email, subject: I18n.t('notification_mailer.favourite.subject', name: @account.acct)
     end
   end
 
-  def reblog(target_status, from_account)
-    @me      = target_status.account
-    @account = from_account
-    @status  = target_status
-
-    return unless @me.user.settings(:notification_emails).reblog
+  def reblog(recipient, notification)
+    @me      = recipient
+    @account = notification.from_account
+    @status  = notification.target_status
 
     I18n.with_locale(@me.user.locale || I18n.default_locale) do
       mail to: @me.user.email, subject: I18n.t('notification_mailer.reblog.subject', name: @account.acct)

app/models/notification.rb

@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+class Notification < ApplicationRecord
+  include Paginable
+
+  belongs_to :account
+  belongs_to :activity, polymorphic: true
+
+  belongs_to :mention,   foreign_type: 'Mention',   foreign_key: 'activity_id'
+  belongs_to :status,    foreign_type: 'Status',    foreign_key: 'activity_id'
+  belongs_to :follow,    foreign_type: 'Follow',    foreign_key: 'activity_id'
+  belongs_to :favourite, foreign_type: 'Favourite', foreign_key: 'activity_id'
+
+  STATUS_INCLUDES = [:account, :media_attachments, mentions: :account, reblog: [:account, mentions: :account]].freeze
+
+  scope :with_includes, -> { includes(status: STATUS_INCLUDES, mention: [status: STATUS_INCLUDES], favourite: [:account, status: STATUS_INCLUDES], follow: :account) }
+
+  def type
+    case activity_type
+    when 'Status'
+      :reblog
+    else
+      activity_type.downcase.to_sym
+    end
+  end
+
+  def from_account
+    case type
+    when :mention
+      activity.status.account
+    when :follow, :favourite, :reblog
+      activity.account
+    end
+  end
+
+  def target_status
+    case type
+    when :reblog
+      activity.reblog
+    when :favourite, :mention
+      activity.status
+    end
+  end
+end

app/services/favourite_service.rb

@@ -10,7 +10,7 @@ class FavouriteService < BaseService
     HubPingWorker.perform_async(account.id)
 
     if status.local?
-      NotificationMailer.favourite(status, account).deliver_later unless status.account.blocking?(account)
+      NotifyService.new.call(status.account, favourite)
     else
       NotificationWorker.perform_async(favourite.stream_entry.id, status.account_id)
     end

app/services/follow_service.rb

@@ -12,7 +12,7 @@ class FollowService < BaseService
     follow = source_account.follow!(target_account)
 
     if target_account.local?
-      NotificationMailer.follow(target_account, source_account).deliver_later unless target_account.blocking?(source_account)
+      NotifyService.new.call(target_account, follow)
     else
       subscribe_service.call(target_account)
       NotificationWorker.perform_async(follow.stream_entry.id, target_account.id)

app/services/notify_service.rb

@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+
+class NotifyService < BaseService
+  def call(recipient, activity)
+    @recipient    = recipient
+    @activity     = activity
+    @notification = Notification.new(account: @recipient, activity: @activity)
+
+    return if blocked?
+
+    create_notification
+    send_email if email_enabled?
+  end
+
+  private
+
+  def blocked?
+    blocked = false
+    blocked ||= @recipient.id == @notification.from_account.id
+    blocked ||= @recipient.blocking?(@notification.from_account)
+    blocked
+  end
+
+  def create_notification
+    @notification.save!
+    FeedManager.instance.broadcast(@recipient.id, type: 'notification', message: FeedManager.instance.inline_render(@recipient, 'api/v1/notifications/show', @notification))
+  end
+
+  def send_email
+    NotificationMailer.send(@notification.type, @recipient, @notification).deliver_later
+  end
+
+  def email_enabled?
+    @recipient.user.settings(:notification_emails).send(@notification.type)
+  end
+end

app/services/process_feed_service.rb

@@ -150,12 +150,10 @@ class ProcessFeedService < BaseService
 
         next if mentioned_account.nil? || processed_account_ids.include?(mentioned_account.id)
 
-        if mentioned_account.local?
-          # Send notifications
-          NotificationMailer.mention(mentioned_account, parent).deliver_later unless mentioned_account.blocking?(parent.account)
-        end
+        mention = mentioned_account.mentions.where(status: parent).first_or_create(status: parent)
 
-        mentioned_account.mentions.where(status: parent).first_or_create(status: parent)
+        # Notify local user
+        NotifyService.new.call(mentioned_account, mention) if mentioned_account.local?
 
         # So we can skip duplicate mentions
         processed_account_ids << mentioned_account.id

app/services/process_interaction_service.rb

@@ -65,8 +65,8 @@ class ProcessInteractionService < BaseService
   end
 
   def follow!(account, target_account)
-    account.follow!(target_account)
-    NotificationMailer.follow(target_account, account).deliver_later unless target_account.blocking?(account)
+    follow = account.follow!(target_account)
+    NotifyService.new.call(target_account, follow)
   end
 
   def unfollow!(account, target_account)
@@ -83,8 +83,8 @@ class ProcessInteractionService < BaseService
 
   def favourite!(xml, from_account)
     current_status = status(xml)
-    current_status.favourites.where(account: from_account).first_or_create!(account: from_account)
-    NotificationMailer.favourite(current_status, from_account).deliver_later unless current_status.account.blocking?(from_account)
+    favourite = current_status.favourites.where(account: from_account).first_or_create!(account: from_account)
+    NotifyService.new.call(current_status.account, favourite)
   end
 
   def add_post!(body, account)

app/services/process_mentions_service.rb

@@ -29,7 +29,7 @@ class ProcessMentionsService < BaseService
       mentioned_account = mention.account
 
       if mentioned_account.local?
-        NotificationMailer.mention(mentioned_account, status).deliver_later unless mentioned_account.blocking?(status.account)
+        NotifyService.new.call(mentioned_account, mention)
       else
         NotificationWorker.perform_async(status.stream_entry.id, mentioned_account.id)
       end

app/services/reblog_service.rb

@@ -11,7 +11,7 @@ class ReblogService < BaseService
     HubPingWorker.perform_async(account.id)
 
     if reblogged_status.local?
-      NotificationMailer.reblog(reblogged_status, account).deliver_later unless reblogged_status.account.blocking?(account)
+      NotifyService.new.call(reblogged_status.account, reblog)
     else
       NotificationWorker.perform_async(reblog.stream_entry.id, reblogged_status.account_id)
     end

app/views/api/v1/notifications/index.rabl

@@ -0,0 +1,2 @@
+collection @notifications
+extends 'api/v1/notifications/show'

app/views/api/v1/notifications/show.rabl

@@ -0,0 +1,11 @@
+object @notification
+
+attributes :id, :type
+
+child from_account: :account do
+  extends 'api/v1/accounts/show'
+end
+
+node(:status, if: lambda { |n| [:favourite, :reblog, :mention].include?(n.type) }) do |n|
+  partial 'api/v1/statuses/show', object: n.target_status
+end