feat: supporting expressions to query metrics data (#270)

src/views/dashboard/data.ts

@@ -56,6 +56,15 @@ export enum ProtocolTypes {
   ReadMetricsValues = "readMetricsValues",
   ReadMetricsValue = "readMetricsValue",
 }
+
+export enum ExpressionResultType {
+  UNKNOWN = "UNKNOWN",
+  SINGLE_VALUE = "SINGLE_VALUE",
+  TIME_SERIES_VALUES = "TIME_SERIES_VALUES",
+  SORTED_LIST = "SORTED_LIST",
+  RECORD_LIST = "RECORD_LIST",
+}
+
 export const DefaultGraphConfig: { [key: string]: any } = {
   Bar: {
     type: "Bar",
@@ -322,3 +331,8 @@ export const RefreshOptions = [
   { label: "Last 8 hours", value: "8", step: "HOUR" },
   { label: "Last 7 days", value: "7", step: "DAY" },
 ];
+
+export enum MetricModes {
+  Expression = "Expression",
+  General = "General",
+}