问正确等待一系列承诺是否被拒绝

EN

function getSubscribers() {
    var subscribers = {};
    try {
        var subscribersRaw = fs.readFileSync(SUBSCRIBERS_PATH);
        subscribers = JSON.parse(subscribersRaw);
    } catch (err) {}
    return subscribers;
}


function setSubscribers(data) {
    fs.writeFileSync(SUBSCRIBERS_PATH, data);
}


function sendNotifications(req, res) {
    var message = "message";
    var icon = "icon.png"
    var subscribers = getSubscribers();

    var subscriber_deleted = 0;

    for (var subid in subscribers) {
        const subscription = subscribers[subid];
        const payload = {
            message: message,
            icon : icon
        };
        const options = {
            TTL: 3600
        };
        webPush.sendNotification(subscription, JSON.stringify(payload), options)
            .then(function() {})
            .catch(function(error) {
                console.log(error);
                if (error.statusCode === 410) {
                    delete subscribers[subid];
                    subscriber_deleted = 1;
                }
            });
    }

    if(subscriber_deleted==1)
    {
        setSubscribers(JSON.stringify(subscribers));
    }

}

if(subscriber_deleted==1)
{
    setSubscribers(JSON.stringify(subscribers));
}