refactor(apps): migrate applications view to react [r8s-124] (#28)

app/react/kubernetes/applications/queries/useApplicationHorizontalPodAutoscaler.ts

@@ -0,0 +1,76 @@
+import { useQuery } from '@tanstack/react-query';
+import { HorizontalPodAutoscalerList } from 'kubernetes-types/autoscaling/v1';
+
+import { withGlobalError } from '@/react-tools/react-query';
+import { EnvironmentId } from '@/react/portainer/environments/types';
+import axios from '@/portainer/services/axios';
+
+import type { Application } from '../types';
+import { parseKubernetesAxiosError } from '../../axiosError';
+
+import { queryKeys } from './query-keys';
+
+// useApplicationHorizontalPodAutoscalers returns a query for horizontal pod autoscalers that are related to the application
+export function useApplicationHorizontalPodAutoscaler(
+  environmentId: EnvironmentId,
+  namespace: string,
+  appName: string,
+  app?: Application
+) {
+  return useQuery(
+    queryKeys.applicationHorizontalPodAutoscalers(
+      environmentId,
+      namespace,
+      appName
+    ),
+    async () => {
+      if (!app) {
+        return null;
+      }
+
+      const horizontalPodAutoscalers =
+        await getNamespaceHorizontalPodAutoscalers(environmentId, namespace);
+      const matchingHorizontalPodAutoscaler =
+        horizontalPodAutoscalers.find((horizontalPodAutoscaler) => {
+          const scaleTargetRef = horizontalPodAutoscaler.spec?.scaleTargetRef;
+          if (scaleTargetRef) {
+            const scaleTargetRefName = scaleTargetRef.name;
+            const scaleTargetRefKind = scaleTargetRef.kind;
+            // include the horizontal pod autoscaler if the scale target ref name and kind match the application name and kind
+            return (
+              scaleTargetRefName === app.metadata?.name &&
+              scaleTargetRefKind === app.kind
+            );
+          }
+          return false;
+        }) || null;
+      return matchingHorizontalPodAutoscaler;
+    },
+    {
+      ...withGlobalError(
+        `Unable to get horizontal pod autoscaler${
+          app ? ` for ${app.metadata?.name}` : ''
+        }`
+      ),
+      enabled: !!app,
+    }
+  );
+}
+
+async function getNamespaceHorizontalPodAutoscalers(
+  environmentId: EnvironmentId,
+  namespace: string
+) {
+  try {
+    const { data: autoScalarList } =
+      await axios.get<HorizontalPodAutoscalerList>(
+        `/endpoints/${environmentId}/kubernetes/apis/autoscaling/v1/namespaces/${namespace}/horizontalpodautoscalers`
+      );
+    return autoScalarList.items;
+  } catch (e) {
+    throw parseKubernetesAxiosError(
+      e,
+      'Unable to retrieve horizontal pod autoscalers'
+    );
+  }
+}