@beenotung/tslib/notification.js

utils library in Typescript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isSupportNotification = isSupportNotification;
exports.requireNotification = requireNotification;
exports.showNotification = showNotification;
const defer_1 = require("./async/defer");
function isSupportNotification() {
    return 'Notification' in window;
}
async function requireNotification() {
    if (!isSupportNotification()) {
        return false;
    }
    const defer = (0, defer_1.createDefer)();
    Notification.requestPermission(res => {
        if (res === 'granted') {
            defer.resolve(true);
        }
        else if (res === 'denied') {
            defer.resolve(false);
        }
        else {
            defer.reject(new Error('unexpected result:' + res));
        }
    });
    return defer.promise;
}
/**
 * alert can be used as fallback, otherwise will reject the promise
 * */
async function showNotification(msg, options, useAlert = true) {
    function fallback() {
        if (useAlert) {
            return alert(msg);
        }
        else {
            throw new Error('Notification is not supported');
        }
    }
    if (!(await requireNotification()) ||
        !('ServiceWorkerRegistration' in window)) {
        return fallback();
    }
    try {
        return ServiceWorkerRegistration.prototype.showNotification(msg, options);
    }
    catch (e) {
        try {
            return new Notification(msg, options);
        }
        catch (e) {
            return fallback();
        }
    }
}