refactor: add hydrogen station drilldown

src/server/routes/energy/query.test.ts

@@ -0,0 +1,21 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  parseHydrogenCustomerKind,
+  parseHydrogenStationId,
+} from './query.js';
+
+test('parses only non-negative integer station ids', () => {
+  assert.equal(parseHydrogenStationId('0'), 0);
+  assert.equal(parseHydrogenStationId('18'), 18);
+  assert.equal(parseHydrogenStationId('-1'), null);
+  assert.equal(parseHydrogenStationId('1 OR 1=1'), null);
+  assert.equal(parseHydrogenStationId(undefined), null);
+});
+
+test('defaults unknown customer scopes to lingniu', () => {
+  assert.equal(parseHydrogenCustomerKind('external'), 'external');
+  assert.equal(parseHydrogenCustomerKind('all'), 'all');
+  assert.equal(parseHydrogenCustomerKind('invalid'), 'lingniu');
+  assert.equal(parseHydrogenCustomerKind(undefined), 'lingniu');
+});