import Router from '../router';
import { sendMessage } from './hot-reloader/pages/websocket';
export default (async (page)=>{
    // Never send pings when using Turbopack as it's not used.
    // Pings were originally used to keep track of active routes in on-demand-entries with webpack.
    if (process.env.TURBOPACK) {
        return;
    }
    if (page) {
        // in AMP the router isn't initialized on the client and
        // client-transitions don't occur so ping initial page
        setInterval(()=>{
            sendMessage(JSON.stringify({
                event: 'ping',
                page
            }));
        }, 2500);
    } else {
        Router.ready(()=>{
            setInterval(()=>{
                // when notFound: true is returned we should use the notFoundPage
                // as the Router.pathname will point to the 404 page but we want
                // to ping the source page that returned notFound: true instead
                const notFoundSrcPage = self.__NEXT_DATA__.notFoundSrcPage;
                const pathname = (Router.pathname === '/404' || Router.pathname === '/_error') && notFoundSrcPage ? notFoundSrcPage : Router.pathname;
                sendMessage(JSON.stringify({
                    event: 'ping',
                    page: pathname
                }));
            }, 2500);
        });
    }
});

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