Add latest changes from gitlab-org/gitlab@master

1 files changed, 41 insertions, 0 deletions

diff --git a/app/graphql/mutations/work_items/subscribe.rb b/app/graphql/mutations/work_items/subscribe.rb
new file mode 100644
index 00000000000..a29c3416c3d
--- /dev/null
+++ b/app/graphql/mutations/work_items/subscribe.rb
@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+module Mutations
+  module WorkItems
+    class Subscribe < BaseMutation
+      graphql_name 'WorkItemSubscribe'
+
+      argument :id, ::Types::GlobalIDType[::WorkItem],
+        required: true,
+        description: 'Global ID of the work item.'
+
+      argument :subscribed,
+        GraphQL::Types::Boolean,
+        required: true,
+        description: 'Desired state of the subscription.'
+
+      field :work_item, Types::WorkItemType,
+        null: true,
+        description: 'Work item after mutation.'
+
+      authorize :update_subscription
+
+      def resolve(args)
+        work_item = authorized_find!(id: args[:id])
+
+        update_subscription(work_item, args[:subscribed])
+
+        {
+          work_item: work_item,
+          errors: []
+        }
+      end
+
+      private
+
+      def update_subscription(work_item, subscribed_state)
+        work_item.set_subscription(current_user, subscribed_state, work_item.project)
+      end
+    end
+  end
+end