API: Ability to subscribe and unsubscribe from a merge request

1 files changed, 36 insertions, 0 deletions

diff --git a/lib/api/merge_requests.rb b/lib/api/merge_requests.rb
index 4e7de8867b4..d166484ba54 100644
--- a/lib/api/merge_requests.rb
+++ b/lib/api/merge_requests.rb
@@ -327,6 +327,42 @@ module API
           issues = ::Kaminari.paginate_array(merge_request.closes_issues(current_user))
           present paginate(issues), with: Entities::Issue, current_user: current_user
         end
+
+        # Subscribes to a merge request
+        #
+        # Parameters:
+        #  id (required)               - The ID of a project
+        #  merge_request_id (required) - The ID of a merge request
+        # Example Request:
+        #   POST /projects/:id/issues/:merge_request_id/subscribe
+        post "#{path}/subscribe" do
+          merge_request = user_project.merge_requests.find(params[:merge_request_id])
+
+          if !merge_request.subscribed?(current_user)
+            merge_request.toggle_subscription(current_user)
+            present merge_request, with: Entities::MergeRequest, current_user: current_user
+          else
+            not_modified!
+          end
+        end
+
+        # Unsubscribes from a merge request
+        #
+        # Parameters:
+        #  id (required)               - The ID of a project
+        #  merge_request_id (required) - The ID of a merge request
+        # Example Request:
+        #   POST /projects/:id/merge_requests/:merge_request_id/unsubscribe
+        post "#{path}/unsubscribe" do
+          merge_request = user_project.merge_requests.find(params[:merge_request_id])
+
+          if merge_request.subscribed?(current_user)
+            merge_request.unsubscribe(current_user)
+            present merge_request, with: Entities::MergeRequest, current_user: current_user
+          else
+            not_modified!
+          end
+        end
       end
     end
   end