grafana/public/app/features/migrate-to-cloud/api/baseAPI.ts

import { BaseQueryFn, createApi } from '@reduxjs/toolkit/query/react';
import { lastValueFrom } from 'rxjs';

import { BackendSrvRequest, getBackendSrv } from '@grafana/runtime';

interface RequestOptions extends BackendSrvRequest {
  manageError?: (err: unknown) => { error: unknown };
  showErrorAlert?: boolean;

  // rtk codegen sets this
  body?: BackendSrvRequest['data'];
}

function createBackendSrvBaseQuery({ baseURL }: { baseURL: string }): BaseQueryFn<RequestOptions> {
  async function backendSrvBaseQuery(requestOptions: RequestOptions) {
    try {
      const { data: responseData, ...meta } = await lastValueFrom(
        getBackendSrv().fetch({
          ...requestOptions,
          url: baseURL + requestOptions.url,
          showErrorAlert: requestOptions.showErrorAlert,
          data: requestOptions.body,
        })
      );
      return { data: responseData, meta };
    } catch (error) {
      return requestOptions.manageError ? requestOptions.manageError(error) : { error };
    }
  }

  return backendSrvBaseQuery;
}

export const baseAPI = createApi({
  reducerPath: 'migrateToCloudGeneratedAPI',
  baseQuery: createBackendSrvBaseQuery({ baseURL: '/api' }),
  endpoints: () => ({}),
});