Detect platform and redirect for app downloading or app custom schema url

PlatformDetectAndRedirect.js

(function() {
    var TIMEOUT = 300;
    var platform = {
        Android: function() {
            return navigator.userAgent.match(/Android/i);
        },
        BlackBerry: function() {
            return navigator.userAgent.match(/BlackBerry/i);
        },
        iOS: function() {
            return navigator.userAgent.match(/iPhone|iPad|iPod/i);
        },
        Opera: function() {
            return navigator.userAgent.match(/Opera Mini/i);
        },
        Windows: function() {
            return navigator.userAgent.match(/IEMobile/i);
        },
        Mobile: function() {
            return (platform.Android() || platform.BlackBerry() || platform.iOS() || platform.Opera() || platform.Windows());
        },
        Desktop: function() {
            return !platform.Mobile();
        }
    };

    var paths = window.location.pathname.split('/');
    var schoolId = paths[paths.length - 1] || paths[paths.length - 2];
    var link = {
        iosInstall: 'https://itunes.apple.com/cn/app/qq-kong-jian/id364183992?mt=8',
        androidInstall: 'http://kidyuan.com',
        appCustomUri: 'kidyuan://joinSchool/' + schoolId,
        desktop: 'http://kidyuan.com'
    };

    if (platform.Desktop()) {
        window.location.href = link.desktop;
    } else {
        window.location.href = link.appCustomUri;
    }


    // App Not Install
    setTimeout(function() {
        if (platform.iOS()) {
            window.location.href = link.iosInstall;
        }
        if (platform.Android()) {
            window.location.href = link.androidInstall;
        }
    }, TIMEOUT);
}());