User left project event added

app/models/event.rb

@@ -11,6 +11,7 @@ class Event < ActiveRecord::Base
   Commented = 6
   Merged    = 7
   Joined    = 8 # User joined project
+  Left      = 9 # User left project
 
   belongs_to :project
   belongs_to :target, polymorphic: true
@@ -38,7 +39,7 @@ class Event < ActiveRecord::Base
   #  - new issue
   #  - merge request
   def allowed?
-    push? || issue? || merge_request? || joined?
+    push? || issue? || merge_request? || membership_changed?
   end
 
   def push?
@@ -86,7 +87,15 @@ class Event < ActiveRecord::Base
   end
 
   def joined?
-    action == self.class::Joined
+    action == Joined
+  end
+
+  def left?
+    action == Left
+  end
+
+  def membership_changed?
+    joined? || left?
   end
 
   def issue 
@@ -108,6 +117,8 @@ class Event < ActiveRecord::Base
       "merged"
     elsif joined?
       'joined'
+    elsif left?
+      'left'
     else 
       "opened"
     end