Refactoring notification service to find subscriptions per project

app/services/notification_service.rb

@@ -75,7 +75,7 @@ class NotificationService
   #  * watchers of the issue's labels
   #
   def relabeled_issue(issue, added_labels, current_user)
-    relabeled_resource_email(issue, added_labels, current_user, :relabeled_issue_email)
+    relabeled_resource_email(issue, issue.project, added_labels, current_user, :relabeled_issue_email)
   end
 
   # When create a merge request we should send an email to:
@@ -118,7 +118,7 @@ class NotificationService
   #  * watchers of the mr's labels
   #
   def relabeled_merge_request(merge_request, added_labels, current_user)
-    relabeled_resource_email(merge_request, added_labels, current_user, :relabeled_merge_request_email)
+    relabeled_resource_email(merge_request, merge_request.target_project, added_labels, current_user, :relabeled_merge_request_email)
   end
 
   def close_mr(merge_request, current_user)
@@ -205,7 +205,7 @@ class NotificationService
 
     recipients = reject_muted_users(recipients, note.project)
 
-    recipients = add_subscribed_users(recipients, note.noteable)
+    recipients = add_subscribed_users(recipients, note.project, note.noteable)
     recipients = reject_unsubscribed_users(recipients, note.noteable)
     recipients = reject_users_without_access(recipients, note.noteable)
 
@@ -505,17 +505,17 @@ class NotificationService
     end
   end
 
-  def add_subscribed_users(recipients, target)
+  def add_subscribed_users(recipients, project, target)
     return recipients unless target.respond_to? :subscribers
 
-    recipients + target.subscribers
+    recipients + target.subscribers(project)
   end
 
-  def add_labels_subscribers(recipients, target, labels: nil)
+  def add_labels_subscribers(recipients, project, target, labels: nil)
     return recipients unless target.respond_to? :labels
 
     (labels || target.labels).each do |label|
-      recipients += label.subscribers
+      recipients += label.subscribers(project)
     end
 
     recipients
@@ -571,8 +571,8 @@ class NotificationService
     end
   end
 
-  def relabeled_resource_email(target, labels, current_user, method)
-    recipients = build_relabeled_recipients(target, current_user, labels: labels)
+  def relabeled_resource_email(target, project, labels, current_user, method)
+    recipients = build_relabeled_recipients(target, project, current_user, labels: labels)
     label_names = labels.map(&:name)
 
     recipients.each do |recipient|
@@ -608,10 +608,10 @@ class NotificationService
     end
 
     recipients = reject_muted_users(recipients, project)
-    recipients = add_subscribed_users(recipients, target)
+    recipients = add_subscribed_users(recipients, project, target)
 
     if [:new_issue, :new_merge_request].include?(custom_action)
-      recipients = add_labels_subscribers(recipients, target)
+      recipients = add_labels_subscribers(recipients, project, target)
     end
 
     recipients = reject_unsubscribed_users(recipients, target)
@@ -622,8 +622,8 @@ class NotificationService
     recipients.uniq
   end
 
-  def build_relabeled_recipients(target, current_user, labels:)
-    recipients = add_labels_subscribers([], target, labels: labels)
+  def build_relabeled_recipients(target, project, current_user, labels:)
+    recipients = add_labels_subscribers([], project, target, labels: labels)
     recipients = reject_unsubscribed_users(recipients, target)
     recipients = reject_users_without_access(recipients, target)
     recipients.delete(current_user)