web/hooks/usePageView.ts

/**
 * Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { useRouter } from "next/router";
import { useEffect } from "react";

import { enabledGa, pageview } from "../src/gtag";

const usePageView = (): void => {
  const router = useRouter();

  useEffect(() => {
    if (!enabledGa) {
      return;
    }

    const handleRouteChange = (url: string) => {
      pageview(url);
    };

    router.events.on("routeChangeComplete", handleRouteChange);
    return () => {
      router.events.off("routeChangeComplete", handleRouteChange);
    };
  }, [router.events]);
};

export { usePageView };