Add unschedule action to status build

app/serializers/build_action_entity.rb

@@ -12,7 +12,11 @@ class BuildActionEntity < Grape::Entity
   end
 
   expose :playable?, as: :playable
-  expose :scheduled_at
+  expose :scheduled_at, if: -> (build) { build.scheduled? }
+
+  expose :unschedule_path, if: -> (build) { build.scheduled? } do |build|
+    unschedule_project_job_path(build.project, build)
+  end
 
   private
 

lib/gitlab/ci/status/build/factory.rb

@@ -15,6 +15,7 @@ module Gitlab
               Status::Build::Retryable],
              [Status::Build::Failed],
              [Status::Build::FailedAllowed,
+              Status::Build::Unschedule,
               Status::Build::Play,
               Status::Build::Stop],
              [Status::Build::Action],

lib/gitlab/ci/status/build/unschedule.rb

+module Gitlab
+  module Ci
+    module Status
+      module Build
+        class Unschedule < Status::Extended
+          def label
+            'unschedule action'
+          end
+
+          def has_action?
+            can?(user, :update_build, subject)
+          end
+
+          def action_icon
+            'time-out'
+          end
+
+          def action_title
+            'Unschedule'
+          end
+
+          def action_button_title
+            _('Unschedule job')
+          end
+
+          def action_path
+            unschedule_project_job_path(subject.project, subject)
+          end
+
+          def action_method
+            :post
+          end
+
+          def self.matches?(build, user)
+            build.scheduled?
+          end
+        end
+      end
+    end
+  end
+end