Use EventCreateService for notes, merge requests

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/observers/merge_request_observer.rb

@@ -2,24 +2,21 @@ class MergeRequestObserver < ActivityObserver
   observe :merge_request
 
   def after_create(merge_request)
-    if merge_request.author_id
-      create_event(merge_request, Event.determine_action(merge_request))
-    end
-
+    event_service.open_mr(merge_request, current_user)
     notification.new_merge_request(merge_request, current_user)
     merge_request.create_cross_references!(merge_request.project, current_user)
     execute_hooks(merge_request)
   end
 
   def after_close(merge_request, transition)
-    create_event(merge_request, Event::CLOSED)
+    event_service.close_mr(merge_request, current_user)
     notification.close_mr(merge_request, current_user)
     create_note(merge_request)
     execute_hooks(merge_request)
   end
 
   def after_reopen(merge_request, transition)
-    create_event(merge_request, Event::REOPENED)
+    event_service.reopen_mr(merge_request, current_user)
     create_note(merge_request)
     execute_hooks(merge_request)
     merge_request.reload_code
@@ -33,16 +30,6 @@ class MergeRequestObserver < ActivityObserver
     execute_hooks(merge_request)
   end
 
-  def create_event(record, status)
-    Event.create(
-      project: record.target_project,
-      target_id: record.id,
-      target_type: record.class.name,
-      action: status,
-      author_id: current_user.id
-    )
-  end
-
   private
 
   # Create merge request note with service comment like 'Status changed to closed'

app/observers/note_observer.rb

@@ -2,6 +2,12 @@ class NoteObserver < BaseObserver
   def after_create(note)
     notification.new_note(note)
 
+    # Skip system notes, like status changes and cross-references.
+    # Skip wall notes to prevent spamming of dashboard
+    if note.noteable_type.present? && !note.system
+      event_service.leave_note(note, current_user)
+    end
+
     unless note.system?
       # Create a cross-reference note if this Note contains GFM that names an
       # issue, merge request, or commit.

app/services/event_create_service.rb

@@ -42,6 +42,14 @@ class EventCreateService
     create_event(milestone, current_user, Event::CLOSED)
   end
 
+  def reopen_milestone(milestone, current_user)
+    create_event(milestone, current_user, Event::REOPENED)
+  end
+
+  def leave_note(note, current_user)
+    create_event(note, current_user, Event::COMMENTED)
+  end
+
   private
 
   def create_event(record, current_user, status)

app/services/merge_requests/base_merge_service.rb

@@ -8,13 +8,7 @@ module MergeRequests
     end
 
     def create_merge_event(merge_request, current_user)
-      Event.create(
-        project: merge_request.target_project,
-        target_id: merge_request.id,
-        target_type: merge_request.class.name,
-        action: Event::MERGED,
-        author_id: current_user.id
-      )
+      EventCreateService.new.merge_mr(merge_request, current_user)
     end
 
     def execute_project_hooks(merge_request)

config/application.rb

@@ -19,7 +19,7 @@ module Gitlab
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
 
     # Activate observers that should always be running.
-    config.active_record.observers = :activity_observer,
+    config.active_record.observers = :milestone_observer,
                                      :project_activity_cache_observer,
                                      :issue_observer,
                                      :key_observer,