1 files changed, 44 insertions, 0 deletions
diff --git a/app/models/blob_viewer/metrics_dashboard_yml.rb b/app/models/blob_viewer/metrics_dashboard_yml.rb
new file mode 100644
index 00000000000..c05fb5d88d6
--- /dev/null
+++ b/app/models/blob_viewer/metrics_dashboard_yml.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+module BlobViewer
+  class MetricsDashboardYml < Base
+    include ServerSide
+    include Gitlab::Utils::StrongMemoize
+    include Auxiliary
+
+    self.partial_name = 'metrics_dashboard_yml'
+    self.loading_partial_name = 'metrics_dashboard_yml_loading'
+    self.file_types = %i(metrics_dashboard)
+    self.binary = false
+
+    def valid?
+      errors.blank?
+    end
+
+    def errors
+      strong_memoize(:errors) do
+        prepare!
+        parse_blob_data
+      end
+    end
+
+    private
+
+    def parse_blob_data
+      yaml = ::Gitlab::Config::Loader::Yaml.new(blob.data).load_raw!
+
+      ::PerformanceMonitoring::PrometheusDashboard.from_json(yaml)
+      nil
+    rescue Gitlab::Config::Loader::FormatError => error
+      wrap_yml_syntax_error(error)
+    rescue ActiveModel::ValidationError => invalid
+      invalid.model.errors
+    end
+
+    def wrap_yml_syntax_error(error)
+      ::PerformanceMonitoring::PrometheusDashboard.new.errors.tap do |errors|
+        errors.add(:'YAML syntax', error.message)
+      end
+    end
+  end
+end