1 files changed, 42 insertions, 0 deletions
diff --git a/app/controllers/projects/metrics/dashboards/builder_controller.rb b/app/controllers/projects/metrics/dashboards/builder_controller.rb
new file mode 100644
index 00000000000..2ab574d7d10
--- /dev/null
+++ b/app/controllers/projects/metrics/dashboards/builder_controller.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+module Projects
+  module Metrics
+    module Dashboards
+      class BuilderController < Projects::ApplicationController
+        before_action :authorize_metrics_dashboard!
+
+        def panel_preview
+          respond_to do |format|
+            format.json do
+              if rendered_panel.success?
+                render json: rendered_panel.payload
+              else
+                render json: { message: rendered_panel.message }, status: :unprocessable_entity
+              end
+            end
+          end
+        end
+
+        private
+
+        def rendered_panel
+          @panel_preview ||= ::Metrics::Dashboard::PanelPreviewService.new(project, panel_yaml, environment).execute
+        end
+
+        def panel_yaml
+          params.require(:panel_yaml)
+        end
+
+        def environment
+          @environment ||=
+            if params[:environment]
+              project.environments.find(params[:environment])
+            else
+              project.default_environment
+            end
+        end
+      end
+    end
+  end
+end