Use NotificationService for observers pt1

app/observers/issue_observer.rb

@@ -2,41 +2,33 @@ class IssueObserver < ActiveRecord::Observer
   cattr_accessor :current_user
 
   def after_create(issue)
-    if issue.assignee && issue.assignee != current_user
-      Notify.delay.new_issue_email(issue.id)
-    end
+    notification.new_issue(issue, current_user)
   end
 
   def after_close(issue, transition)
-    send_reassigned_email(issue) if issue.is_being_reassigned?
+    notification.close_issue(issue, current_user)
 
     create_note(issue)
   end
 
   def after_reopen(issue, transition)
-    send_reassigned_email(issue) if issue.is_being_reassigned?
-
     create_note(issue)
   end
 
   def after_update(issue)
-    send_reassigned_email(issue) if issue.is_being_reassigned?
+    if issue.is_being_reassigned?
+      notification.reassigned_issue(issue, current_user)
+    end
   end
 
   protected
 
+  # Create issue note with service comment like 'Status changed to closed'
   def create_note(issue)
     Note.create_status_change_note(issue, current_user, issue.state)
-    [issue.author, issue.assignee].compact.uniq.each do |recipient|
-      Notify.delay.issue_status_changed_email(recipient.id, issue.id, issue.state, current_user.id)
-    end
   end
 
-  def send_reassigned_email(issue)
-    recipient_ids = [issue.assignee_id, issue.assignee_id_was].keep_if {|id| id && id != current_user.id }
-
-    recipient_ids.each do |recipient_id|
-      Notify.delay.reassigned_issue_email(recipient_id, issue.id, issue.assignee_id_was)
-    end
+  def notification
+    NotificationService.new
   end
 end

app/observers/key_observer.rb

@@ -9,7 +9,7 @@ class KeyObserver < ActiveRecord::Observer
     )
 
     # Notify about ssh key being added
-    Notify.delay.new_ssh_key_email(key.id) if key.user
+    NotificationService.new.new_key(key)
   end
 
   def after_destroy(key)

app/observers/note_observer.rb

@@ -35,4 +35,8 @@ class NoteObserver < ActiveRecord::Observer
   def team_without_note_author(note)
     note.project.users.reject { |u| u.id == note.author.id }
   end
+
+  def notification
+    NotificationService.new
+  end
 end