New Panel: Histogram (#33752)

public/app/plugins/panel/histogram/utils.ts

@@ -0,0 +1,30 @@
+import { DataFrame, FieldType } from '@grafana/data';
+
+import {
+  histogramFrameBucketMinFieldName,
+  histogramFrameBucketMaxFieldName,
+} from '@grafana/data/src/transformations/transformers/histogram';
+
+export function originalDataHasHistogram(frames?: DataFrame[]): boolean {
+  if (frames?.length !== 1) {
+    return false;
+  }
+  const frame = frames[0];
+  if (frame.fields.length < 3) {
+    return false;
+  }
+
+  if (
+    frame.fields[0].name !== histogramFrameBucketMinFieldName ||
+    frame.fields[1].name !== histogramFrameBucketMaxFieldName
+  ) {
+    return false;
+  }
+  for (const field of frame.fields) {
+    if (field.type !== FieldType.number) {
+      return false;
+    }
+  }
+
+  return true;
+}