/**
 * Created by kelvintam on 22/11/2016.
 */


// Helper Library
(function(helper) {
    // This is now a utility function to "Get the Document Hash"
    helper.getDocumentHash = function (urlString) {
        var hashValue = "";

        if (urlString.indexOf('?') != -1) {
            hashValue = urlString.substring(parseInt(urlString.indexOf('?')) + 1);
        }
        return hashValue;
    };
})(this.helper = this.helper || {});



function getParameterByName(name, url) {
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, "\\$&");
    var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, " "));
}

function isFacebookApp() {
    var ua = navigator.userAgent || navigator.vendor || window.opera;
    return (ua.indexOf("FBAN") > -1) || (ua.indexOf("FBAV") > -1);
}

function isAndroid(){
    var ua = navigator.userAgent.toLowerCase();
    var isAndroid = ua.indexOf("android") > -1; //&& ua.indexOf("mobile");
    if(isAndroid) {
        return true;
    }
    return false;
}

function isChrome(){
    var isChrome = /Chrome/.test(navigator.userAgent) && /Google Inc/.test(navigator.vendor);
    return  isChrome;
}

function isFireFox(){
    var is_firefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1;

    return is_firefox;
}

function isAndroidNativeBrowser(){
    var navU = navigator.userAgent;

// Android Mobile
    var isAndroidMobile = navU.indexOf('Android') > -1 && navU.indexOf('Mozilla/5.0') > -1 && navU.indexOf('AppleWebKit') > -1;

// Apple webkit
    var regExAppleWebKit = new RegExp(/AppleWebKit\/([\d.]+)/);
    var resultAppleWebKitRegEx = regExAppleWebKit.exec(navU);
    var appleWebKitVersion = (resultAppleWebKitRegEx === null ? null : parseFloat(regExAppleWebKit.exec(navU)[1]));

// Chrome
    var regExChrome = new RegExp(/Chrome\/([\d.]+)/);
    var resultChromeRegEx = regExChrome.exec(navU);
    var chromeVersion = (resultChromeRegEx === null ? null : parseFloat(regExChrome.exec(navU)[1]));
    // Native Android Browser
    var isAndroidBrowser = isAndroidMobile && !isFireFox() && (appleWebKitVersion !== null && appleWebKitVersion < 537) || (chromeVersion !== null && chromeVersion < 38.1);

    return isAndroidBrowser;
}
var iOS = parseFloat(
        ('' + (/CPU.*OS ([0-9_]{1,5})|(CPU like).*AppleWebKit.*Mobile/i.exec(navigator.userAgent) || [0,''])[1])
            .replace('undefined', '3_2').replace('_', '.').replace('_', '')
    ) || false;