Add option to be notified when a followed user posts (#13546)

* Add bell button

Fix #4890

* Remove duplicate type from post-deployment migration

* Fix legacy class type mappings

* Improve query performance with better index

* Fix validation

* Remove redundant index from notifications

app/workers/feed_insert_worker.rb

@@ -23,7 +23,10 @@ class FeedInsertWorker
   private
 
   def check_and_insert
-    perform_push unless feed_filtered?
+    return if feed_filtered?
+
+    perform_push
+    perform_notify if notify?
   end
 
   def feed_filtered?
@@ -35,6 +38,12 @@ class FeedInsertWorker
     end
   end
 
+  def notify?
+    return false if @type != :home || @status.reblog? || (@status.reply? && @status.in_reply_to_account_id != @status.account_id)
+
+    Follow.find_by(account: @follower, target_account: @status.account)&.notify?
+  end
+
   def perform_push
     case @type
     when :home
@@ -43,4 +52,8 @@ class FeedInsertWorker
       FeedManager.instance.push_to_list(@list, @status)
     end
   end
+
+  def perform_notify
+    NotifyService.new.call(@follower, :status, @status)
+  end
 end

app/workers/local_notification_worker.rb

@@ -3,7 +3,7 @@
 class LocalNotificationWorker
   include Sidekiq::Worker
 
-  def perform(receiver_account_id, activity_id = nil, activity_class_name = nil)
+  def perform(receiver_account_id, activity_id = nil, activity_class_name = nil, type = nil)
     if activity_id.nil? && activity_class_name.nil?
       activity = Mention.find(receiver_account_id)
       receiver = activity.account
@@ -12,7 +12,7 @@ class LocalNotificationWorker
       activity = activity_class_name.constantize.find(activity_id)
     end
 
-    NotifyService.new.call(receiver, activity)
+    NotifyService.new.call(receiver, type || activity_class_name.underscore, activity)
   rescue ActiveRecord::RecordNotFound
     true
   end

app/workers/poll_expiration_notify_worker.rb

@@ -11,12 +11,12 @@ class PollExpirationNotifyWorker
     # Notify poll owner and remote voters
     if poll.local?
       ActivityPub::DistributePollUpdateWorker.perform_async(poll.status.id)
-      NotifyService.new.call(poll.account, poll)
+      NotifyService.new.call(poll.account, :poll, poll)
     end
 
     # Notify local voters
     poll.votes.includes(:account).map(&:account).select(&:local?).each do |account|
-      NotifyService.new.call(account, poll)
+      NotifyService.new.call(account, :poll, poll)
     end
   rescue ActiveRecord::RecordNotFound
     true

app/workers/refollow_worker.rb

@@ -11,6 +11,7 @@ class RefollowWorker
 
     target_account.passive_relationships.where(account: Account.where(domain: nil)).includes(:account).reorder(nil).find_each do |follow|
       reblogs = follow.show_reblogs?
+      notify  = follow.notify?
 
       # Locally unfollow remote account
       follower = follow.account
@@ -18,7 +19,7 @@ class RefollowWorker
 
       # Schedule re-follow
       begin
-        FollowService.new.call(follower, target_account, reblogs: reblogs)
+        FollowService.new.call(follower, target_account, reblogs: reblogs, notify: notify)
       rescue Mastodon::NotPermittedError, ActiveRecord::RecordNotFound, Mastodon::UnexpectedResponseError, HTTP::Error, OpenSSL::SSL::SSLError
         next
       end

app/workers/unfollow_follow_worker.rb

@@ -10,10 +10,11 @@ class UnfollowFollowWorker
     old_target_account = Account.find(old_target_account_id)
     new_target_account = Account.find(new_target_account_id)
 
-    follow = follower_account.active_relationships.find_by(target_account: old_target_account)
+    follow  = follower_account.active_relationships.find_by(target_account: old_target_account)
     reblogs = follow&.show_reblogs?
+    notify  = follow&.notify?
 
-    FollowService.new.call(follower_account, new_target_account, reblogs: reblogs, bypass_locked: bypass_locked)
+    FollowService.new.call(follower_account, new_target_account, reblogs: reblogs, notify: notify, bypass_locked: bypass_locked)
     UnfollowService.new.call(follower_account, old_target_account, skip_unmerge: true)
   rescue ActiveRecord::RecordNotFound, Mastodon::NotPermittedError
     true