Removed lodash; Add test for no groups

package.json

@@ -31,7 +31,6 @@
     "@lezer/common": "1.1.1",
     "@lezer/highlight": "1.2.0",
     "@lezer/lr": "1.3.14",
-    "lodash": "^4.17.21",
     "react": "18.2.0",
     "react-dom": "18.2.0",
     "tslib": "2.5.3"

src/preprocessors/__snapshots__/index.test.js.snap

@@ -156,3 +156,44 @@ exports[`preprocesses Timeseries successfully should set displayNameDS with lege
   "refId": undefined,
 }
 `;
+
+exports[`preprocesses Timeseries successfully should work if there are no labels 1`] = `
+{
+  "fields": [
+    {
+      "config": {},
+      "labels": undefined,
+      "name": "Time",
+      "type": "time",
+      "values": [
+        0,
+        1,
+        2,
+      ],
+    },
+    {
+      "config": {
+        "displayNameFromDS": "<undefined>",
+        "links": [
+          {
+            "targetBlank": true,
+            "title": "Create a Notebook in Lightstep",
+            "url": "https://notebooks",
+          },
+        ],
+      },
+      "labels": {},
+      "name": "Value",
+      "type": "number",
+      "values": [
+        1,
+        7,
+        1,
+      ],
+    },
+  ],
+  "meta": undefined,
+  "name": undefined,
+  "refId": undefined,
+}
+`;

src/preprocessors/index.test.js

@@ -75,4 +75,24 @@ describe('preprocesses Timeseries successfully', () => {
     const query = { projectName: 'demo', format: '{{operation}}' };
     expect(preprocessData(res, query, 'https://notebooks')).toMatchSnapshot();
   });
+
+  it('should work if there are no labels', () => {
+    const res = {
+      data: {
+        attributes: {
+          series: [
+            {
+              points: [
+                [0, 1],
+                [1, 7],
+                [2, 1],
+              ],
+            },
+          ],
+        },
+      },
+    };
+    const query = { projectName: 'demo', format: '{{operation}}' };
+    expect(preprocessData(res, query, 'https://notebooks')).toMatchSnapshot();
+  });
 });

src/preprocessors/timeseries.ts

@@ -1,7 +1,5 @@
 import { Field, FieldType, toDataFrame, Labels, TIME_SERIES_VALUE_FIELD_NAME } from '@grafana/data';
 import { LightstepQuery, QueryTimeseriesRes } from '../types';
-import { template } from 'lodash';
-
 
 /**
  * Response pre-processor that converts the LS response data into Grafana wide
@@ -69,7 +67,7 @@ export function preprocessTimeseries(res: QueryTimeseriesRes, query: LightstepQu
       });
     }
 
-    const labels: Labels = transformLabels(s['group-labels']);
+    const labels: Labels = transformLabels(s['group-labels'] || []);
 
     dataFrameFields.push({
       name: TIME_SERIES_VALUE_FIELD_NAME,
@@ -143,5 +141,6 @@ export function createTimestampMap(timestamps: number[]): Map<number, number> {
 
 // TODO: remove when Grafana 10 is the minimum supported version
 function legenedFormatter(legend: string, labels: Labels) {
-  return template(legend, {interpolate: /{{([\s\S]+?)}}/g})(labels);
+  const aliasRegex = /\{\{\s*(.+?)\s*\}\}/g;
+  return legend.replace(aliasRegex, (_, group) => (labels[group] ? labels[group] : "<undefined>"));
 }