1 files changed, 28 insertions, 0 deletions
diff --git a/app/services/merge_requests/request_review_service.rb b/app/services/merge_requests/request_review_service.rb
new file mode 100644
index 00000000000..b061ed45fee
--- /dev/null
+++ b/app/services/merge_requests/request_review_service.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module MergeRequests
+  class RequestReviewService < MergeRequests::BaseService
+    def execute(merge_request, user)
+      return error("Invalid permissions") unless can?(current_user, :update_merge_request, merge_request)
+
+      reviewer = merge_request.find_reviewer(user)
+
+      if reviewer
+        return error("Failed to update reviewer") unless reviewer.update(state: :unreviewed)
+
+        notify_reviewer(merge_request, user)
+
+        success
+      else
+        error("Reviewer not found")
+      end
+    end
+
+    private
+
+    def notify_reviewer(merge_request, reviewer)
+      notification_service.async.review_requested_of_merge_request(merge_request, current_user, reviewer)
+      todo_service.create_request_review_todo(merge_request, current_user, reviewer)
+    end
+  end
+end