/* Add to Homescreen v3.2.3 ~ (c) 2015 Matteo Spinelli ~ @license: http://cubiq.org/license */
(function (window, document) {
    /*
           _   _ _____     _____
     ___ _| |_| |_   _|___|  |  |___ _____ ___ ___ ___ ___ ___ ___ ___
    | .'| . | . | | | | . |     | . |     | -_|_ -|  _|  _| -_| -_|   |
    |__,|___|___| |_| |___|__|__|___|_|_|_|___|___|___|_| |___|___|_|_|
                                  by Matteo Spinelli ~ http://cubiq.org
    */

// Check for addEventListener browser support (prevent errors in IE<9)
    var _eventListener = 'addEventListener' in window;

// Check if document is loaded, needed by autostart
    var _DOMReady = false;
    if ( document.readyState === 'complete' ) {
        _DOMReady = true;
    } else if ( _eventListener ) {
        window.addEventListener('load', loaded, false);
    }

    function loaded () {
        window.removeEventListener('load', loaded, false);
        _DOMReady = true;
    }

// regex used to detect if app has been added to the homescreen
    var _reSmartURL = /\/ath(\/)?$/;
    var _reQueryString = /([\?&]ath=[^&]*$|&ath=[^&]*(&))/;

// singleton
    var _instance;
    function ath (options) {
        _instance = _instance || new ath.Class(options);

        return _instance;
    }

// message in all supported languages
    ath.intl = {
        cs_cs: {
            ios: 'Pro přidáni této webové aplikace na úvodní obrazovku: stlačte %icon a pak <strong>Přidat na úvodní obrazovku</strong>.',
            android: 'Pro přidáni této webové aplikace na úvodní obrazovku otevřete menu nastavení prohlížeče a stlačte <strong>Přidat na úvodní obrazovku</strong>. <small>K menu se dostanete stlačením hardwaroveho tlačítka, když ho vaše zařízení má, nebo stlačením pravé horní menu ikony <span class="ath-action-icon">icon</span>.</small>'
        },

        de_de: {
            ios: 'Um diese Web-App zum Home-Bildschirm hinzuzufügen, tippen Sie auf %icon und dann <strong>Zum Home-Bildschirm</strong>.',
            android: 'Um diese Web-App zum Home-Bildschirm hinzuzufügen, öffnen Sie das Menü und tippen dann auf <strong>Zum Startbildschirm hinzufügen</strong>. <small>Wenn Ihr Gerät eine Menütaste hat, lässt sich das Browsermenü über diese öffnen. Ansonsten tippen Sie auf %icon.</small>'
        },

        da_dk: {
            ios: 'For at tilføje denne web app til hjemmeskærmen: Tryk %icon og derefter <strong>Føj til hjemmeskærm</strong>.',
            android: 'For at tilføje denne web app til hjemmeskærmen, åbn browser egenskaber menuen og tryk på <strong>Føj til hjemmeskærm</strong>. <small>Denne menu kan tilgås ved at trykke på menu knappen, hvis din enhed har en, eller ved at trykke på det øverste højre menu ikon %icon.</small>'
        },

        el_gr: {
            ios: 'Για να προσθέσετε την εφαρμογή στην αρχική οθόνη: πατήστε το %icon και μετά <strong>Πρόσθεσε στην αρχική οθόνη</strong>.',
            android: 'Για να προσθέσετε την εφαρμογή στην αρχική οθόνη, ανοίξτε τις επιλογές του browser σας και πατήστε το <strong>Προσθήκη στην αρχική οθόνη</strong>. <small>Μπορείτε να έχετε πρόσβαση στο μενού, πατώντας το κουμπί του μενού του κινητού σας ή το πάνω δεξιά κουμπί του μενού %icon.</small>'
        },

        en_us: {
            ios: 'To add this web app to the home screen: tap %icon and then <strong>Add to Home Screen</strong>.',
            android: 'To add this web app to the home screen open the browser option menu and tap on <strong>Add to homescreen</strong>. <small>The menu can be accessed by pressing the menu hardware button if your device has one, or by tapping the top right menu icon %icon.</small>'
        },

        es_es: {
            ios: 'Para añadir esta aplicación web a la pantalla de inicio: pulsa %icon y selecciona <strong>Añadir a pantalla de inicio</strong>.',
            android: 'Para añadir esta aplicación web a la pantalla de inicio, abre las opciones y pulsa <strong>Añadir a pantalla inicio</strong>. <small>El menú se puede acceder pulsando el botón táctil en caso de tenerlo, o bien el icono de la parte superior derecha de la pantalla %icon.</small>'
        },

        fi_fi: {
            ios: 'Liitä tämä sovellus kotivalikkoon: klikkaa %icon ja tämän jälkeen <strong>Lisää kotivalikkoon</strong>.',
            android: 'Lisätäksesi tämän sovelluksen aloitusnäytölle, avaa selaimen valikko ja klikkaa tähti -ikonia tai <strong>Lisää aloitusnäytölle tekstiä</strong>. <small>Valikkoon pääsee myös painamalla menuvalikkoa, jos laitteessasi on sellainen tai koskettamalla oikealla yläkulmassa menu ikonia %icon.</small>'
        },

        fr_fr: {
            ios: 'Pour ajouter cette application web sur l\'écran d\'accueil : Appuyez %icon et sélectionnez <strong>Ajouter sur l\'écran d\'accueil</strong>.',
            android: 'Pour ajouter cette application web sur l\'écran d\'accueil : Appuyez sur le bouton "menu", puis sur <strong>Ajouter sur l\'écran d\'accueil</strong>. <small>Le menu peut-être accessible en appuyant sur le bouton "menu" du téléphone s\'il en possède un <i class="fa fa-bars"></i>. Sinon, il se trouve probablement dans la coin supérieur droit du navigateur %icon.</small>'
        },

        he_il: {
            ios: '<span dir="rtl">להוספת האפליקציה למסך הבית: ללחוץ על %icon ואז <strong>הוסף למסך הבית</strong>.</span>',
            android: 'To add this web app to the home screen open the browser option menu and tap on <strong>Add to homescreen</strong>. <small>The menu can be accessed by pressing the menu hardware button if your device has one, or by tapping the top right menu icon %icon.</small>'
        },

        hu_hu: {
            ios: 'Ha hozzá szeretné adni ezt az alkalmazást a kezdőképernyőjéhez, érintse meg a következő ikont: %icon , majd a <strong>Hozzáadás a kezdőképernyőhöz</strong> menüpontot.',
            android: 'Ha hozzá szeretné adni ezt az alkalmazást a kezdőképernyőjéhez, a böngésző menüjében kattintson a <strong>Hozzáadás a kezdőképernyőhöz</strong> menüpontra. <small>A böngésző menüjét a következő ikon megérintésével tudja megnyitni: %icon.</small>'
        },

        it_it: {
            ios: 'Per aggiungere questa web app alla schermata iniziale: premi %icon e poi <strong>Aggiungi a Home</strong>.',
            android: 'Per aggiungere questa web app alla schermata iniziale, apri il menu opzioni del browser e premi su <strong>Aggiungi alla homescreen</strong>. <small>Puoi accedere al menu premendo il pulsante hardware delle opzioni se la tua device ne ha uno, oppure premendo l\'icona %icon in alto a destra.</small>'
        },

        ja_jp: {
            ios: 'このウェプアプリをホーム画面に追加するには、%iconをタップして<strong>ホーム画面に追加</strong>してください。',
            android: 'このウェプアプリをホーム画面に追加するには、ブラウザのオプションメニューから<strong>ホーム画面に追加</strong>をタップしてください。<small>オプションメニューは、一部の機種ではデバイスのメニューボタンから、それ以外では画面右上の%iconからアクセスできます。</small>'
        },

        ko_kr: {
            ios: '홈 화면에 바로가기 생성: %icon 을 클릭한 후 <strong>홈 화면에 추가</strong>.',
            android: '브라우저 옵션 메뉴의 <string>홈 화면에 추가</string>를 클릭하여 홈화면에 바로가기를 생성할 수 있습니다. <small>옵션 메뉴는 장치의 메뉴 버튼을 누르거나 오른쪽 상단의 메뉴 아이콘 %icon을 클릭하여 접근할 수 있습니다.</small>'
        },

        nb_no: {
            ios: 'For å installere denne appen på hjem-skjermen: trykk på %icon og deretter <strong>Legg til på Hjem-skjerm</strong>.',
            android: 'For å legge til denne webappen på startsiden åpner en nettlesermenyen og velger <strong>Legg til på startsiden</strong>. <small>Menyen åpnes ved å trykke på den fysiske menyknappen hvis enheten har det, eller ved å trykke på menyikonet øverst til høyre %icon.</small>'
        },

        pt_br: {
            ios: 'Para adicionar este app à tela de início: clique %icon e então <strong>Tela de início</strong>.',
            android: 'Para adicionar este app à tela de início, abra o menu de opções do navegador e selecione <strong>Adicionar à tela inicial</strong>. <small>O menu pode ser acessado pressionando o "menu" button se o seu dispositivo tiver um, ou selecionando o ícone %icon no canto superior direito.</small>'
        },

        pt_pt: {
            ios: 'Para adicionar esta app ao ecrã principal: clique %icon e depois <strong>Ecrã principal</strong>.',
            android: 'Para adicionar esta app web ecrã principal, abra o menu de opções do navegador e selecione <strong>Adicionar à tela inicial</strong>. <small>O menu pode ser acessado pressionando o "menu" button se o seu dispositivo tiver um, ou selecionando o ícone %icon no canto superior direito.</small>'
        },

        nl_nl: {
            ios: 'Om deze webapp aan je startscherm toe te voegen, klik op %icon en dan <strong>Zet in startscherm</strong>.',
            android: 'Om deze webapp aan je startscherm toe te voegen, open de browserinstellingen en tik op <strong>Toevoegen aan startscherm</strong>. <small>Gebruik de "menu" knop als je telefoon die heeft, anders het menu-icoon rechtsbovenin %icon.</small>'
        },

        ru_ru: {
            ios: 'Чтобы добавить этот сайт на свой домашний экран, нажмите на иконку %icon и затем <strong>На экран "Домой"</strong>.',
            android: 'Чтобы добавить сайт на свой домашний экран, откройте меню браузера и нажмите на <strong>Добавить на главный экран</strong>. <small>Меню можно вызвать, нажав на кнопку меню вашего телефона, если она есть. Или найдите иконку сверху справа %icon[иконка].</small>'
        },

        sk_sk: {
            ios: 'Pre pridanie tejto webovej aplikácie na úvodnú obrazovku: stlačte %icon a potom <strong>Pridať na úvodnú obrazovku</strong>.',
            android: 'Pre pridanie tejto webovej aplikácie na úvodnú obrazovku otvorte menu nastavenia prehliadača a stlačte <strong>Pridať na úvodnú obrazovku</strong>. <small>K menu sa dostanete stlačením hardwaroveho tlačidla, ak ho vaše zariadenie má, alebo stlačením pravej hornej menu ikony <span class="ath-action-icon">icon</span>.</small>'
        },

        sv_se: {
            ios: 'För att lägga till denna webbapplikation på hemskärmen: tryck på %icon och därefter <strong>Lägg till på hemskärmen</strong>.',
            android: 'För att lägga till den här webbappen på hemskärmen öppnar du webbläsarens alternativ-meny och väljer <strong>Lägg till på startskärmen</strong>. <small>Man hittar menyn genom att trycka på hårdvaruknappen om din enhet har en sådan, eller genom att trycka på menyikonen högst upp till höger %icon.</small>'
        },

        tr_tr: {
            ios: 'Uygulamayı ana ekrana eklemek için, %icon ve ardından <strong>ana ekrana ekle</strong> butonunu tıklayın.',
            android: 'Uygulamayı ana ekrana eklemek için, menüye girin ve <strong>ana ekrana ekle</strong> butonunu tıklayın. <small>Cihazınız menü tuşuna sahip ise menüye girmek için menü tuşunu tıklayın. Aksi takdirde %icon butonunu tıklayın.</small>'
        },

        uk_ua: {
            ios: 'Щоб додати цей сайт на початковий екран, натисніть %icon, а потім <strong>На початковий екран</strong>.',
            android: 'Щоб додати цей сайт на домашній екран, відкрийте меню браузера та виберіть <strong>Додати на головний екран</strong>. <small>Це можливо зробити, натиснувши кнопку меню на вашому смартфоні, якщо така є. Або ж на іконці зверху справа %icon.</small>'
        },

        zh_cn: {
            ios: '如要把应用程序加至主屏幕,请点击%icon, 然后<strong>添加到主屏幕</strong>',
            android: 'To add this web app to the home screen open the browser option menu and tap on <strong>Add to homescreen</strong>. <small>The menu can be accessed by pressing the menu hardware button if your device has one, or by tapping the top right menu icon %icon.</small>'
        },

        zh_tw: {
            ios: '如要把應用程式加至主屏幕, 請點擊%icon, 然後<strong>加至主屏幕</strong>.',
            android: 'To add this web app to the home screen open the browser option menu and tap on <strong>Add to homescreen</strong>. <small>The menu can be accessed by pressing the menu hardware button if your device has one, or by tapping the top right menu icon %icon.</small>'
        }
    };

// Add 2 characters language support (Android mostly)
    for ( var lang in ath.intl ) {
        ath.intl[lang.substr(0, 2)] = ath.intl[lang];
    }

// default options
    ath.defaults = {
        appID: 'org.cubiq.addtohome',		// local storage name (no need to change)
        fontSize: 15,				// base font size, used to properly resize the popup based on viewport scale factor
        debug: false,				// override browser checks
        logging: false,				// log reasons for showing or not showing to js console; defaults to true when debug is true
        modal: false,				// prevent further actions until the message is closed
        mandatory: false,			// you can't proceed if you don't add the app to the homescreen
        autostart: true,			// show the message automatically
        skipFirstVisit: false,		// show only to returning visitors (ie: skip the first time you visit)
        startDelay: 1,				// display the message after that many seconds from page load
        lifespan: 15,				// life of the message in seconds
        displayPace: 1440,			// minutes before the message is shown again (0: display every time, default 24 hours)
        maxDisplayCount: 0,			// absolute maximum number of times the message will be shown to the user (0: no limit)
        icon: true,					// add touch icon to the message
        message: '',				// the message can be customized
        validLocation: [],			// list of pages where the message will be shown (array of regexes)
        onInit: null,				// executed on instance creation
        onShow: null,				// executed when the message is shown
        onRemove: null,				// executed when the message is removed
        onAdd: null,				// when the application is launched the first time from the homescreen (guesstimate)
        onPrivate: null,			// executed if user is in private mode
        privateModeOverride: false,	// show the message even in private mode (very rude)
        detectHomescreen: false		// try to detect if the site has been added to the homescreen (false | true | 'hash' | 'queryString' | 'smartURL')
    };

// browser info and capability
    var _ua = window.navigator.userAgent;

    var _nav = window.navigator;
    _extend(ath, {
        hasToken: document.location.hash == '#ath' || _reSmartURL.test(document.location.href) || _reQueryString.test(document.location.search),
        isRetina: window.devicePixelRatio && window.devicePixelRatio > 1,
        isIDevice: (/iphone|ipod|ipad/i).test(_ua),
        isMobileChrome: _ua.indexOf('Android') > -1 && (/Chrome\/[.0-9]*/).test(_ua) && _ua.indexOf("Version") == -1,
        isMobileIE: _ua.indexOf('Windows Phone') > -1,
        language: _nav.language && _nav.language.toLowerCase().replace('-', '_') || ''
    });

// falls back to en_us if language is unsupported
    ath.language = ath.language && ath.language in ath.intl ? ath.language : 'en_us';

    ath.isMobileSafari = ath.isIDevice && _ua.indexOf('Safari') > -1 && _ua.indexOf('CriOS') < 0;
    ath.OS = ath.isIDevice ? 'ios' : ath.isMobileChrome ? 'android' : ath.isMobileIE ? 'windows' : 'unsupported';

    ath.OSVersion = _ua.match(/(OS|Android) (\d+[_\.]\d+)/);
    ath.OSVersion = ath.OSVersion && ath.OSVersion[2] ? +ath.OSVersion[2].replace('_', '.') : 0;

    ath.isStandalone = 'standalone' in window.navigator && window.navigator.standalone;
    ath.isTablet = (ath.isMobileSafari && _ua.indexOf('iPad') > -1) || (ath.isMobileChrome && _ua.indexOf('Mobile') < 0);

    ath.isCompatible = (ath.isMobileSafari && ath.OSVersion >= 6) || ath.isMobileChrome;	// TODO: add winphone

    var _defaultSession = {
        lastDisplayTime: 0,			// last time we displayed the message
        returningVisitor: false,	// is this the first time you visit
        displayCount: 0,			// number of times the message has been shown
        optedout: false,			// has the user opted out
        added: false				// has been actually added to the homescreen
    };

    ath.removeSession = function (appID) {
        try {
            if (!localStorage) {
                throw new Error('localStorage is not defined');
            }

            localStorage.removeItem(appID || ath.defaults.appID);
        } catch (e) {
            // we are most likely in private mode
        }
    };

    ath.doLog = function (logStr) {
        if ( this.options.logging ) {
            console.log(logStr);
        }
    };

    ath.Class = function (options) {
        // class methods
        this.doLog = ath.doLog;

        // merge default options with user config
        this.options = _extend({}, ath.defaults);
        _extend(this.options, options);
        // override defaults that are dependent on each other
        if ( this.options && this.options.debug && (typeof this.options.logging === "undefined") ) {
            this.options.logging = true;
        }

        // IE<9 so exit (I hate you, really)
        if ( !_eventListener ) {
            return;
        }

        // normalize some options
        this.options.mandatory = this.options.mandatory && ( 'standalone' in window.navigator || this.options.debug );
        this.options.modal = this.options.modal || this.options.mandatory;
        if ( this.options.mandatory ) {
            this.options.startDelay = -0.5;		// make the popup hasty
        }
        this.options.detectHomescreen = this.options.detectHomescreen === true ? 'hash' : this.options.detectHomescreen;

        // setup the debug environment
        if ( this.options.debug ) {
            ath.isCompatible = true;
            ath.OS = typeof this.options.debug == 'string' ? this.options.debug : ath.OS == 'unsupported' ? 'android' : ath.OS;
            ath.OSVersion = ath.OS == 'ios' ? '8' : '4';
        }

        // the element the message will be appended to
        this.container = document.body;

        // load session
        this.session = this.getItem(this.options.appID);
        this.session = this.session ? JSON.parse(this.session) : undefined;

        // user most likely came from a direct link containing our token, we don't need it and we remove it
        if ( ath.hasToken && ( !ath.isCompatible || !this.session ) ) {
            ath.hasToken = false;
            _removeToken();
        }

        // the device is not supported
        if ( !ath.isCompatible ) {
            this.doLog("Add to homescreen: not displaying callout because device not supported");
            return;
        }

        this.session = this.session || _defaultSession;

        // check if we can use the local storage
        try {
            if (!localStorage) {
                throw new Error('localStorage is not defined');
            }

            localStorage.setItem(this.options.appID, JSON.stringify(this.session));
            ath.hasLocalStorage = true;
        } catch (e) {
            // we are most likely in private mode
            ath.hasLocalStorage = false;

            if ( this.options.onPrivate ) {
                this.options.onPrivate.call(this);
            }
        }

        // check if this is a valid location
        var isValidLocation = !this.options.validLocation.length;
        for ( var i = this.options.validLocation.length; i--; ) {
            if ( this.options.validLocation[i].test(document.location.href) ) {
                isValidLocation = true;
                break;
            }
        }

        // check compatibility with old versions of add to homescreen. Opt-out if an old session is found
        if ( this.getItem('addToHome') ) {
            this.optOut();
        }

        // critical errors:
        if ( this.session.optedout ) {
            this.doLog("Add to homescreen: not displaying callout because user opted out");
            return;
        }
        if ( this.session.added ) {
            this.doLog("Add to homescreen: not displaying callout because already added to the homescreen");
            return;
        }
        if ( !isValidLocation ) {
            this.doLog("Add to homescreen: not displaying callout because not a valid location");
            return;
        }

        // check if the app is in stand alone mode
        if ( ath.isStandalone ) {
            // execute the onAdd event if we haven't already
            if ( !this.session.added ) {
                this.session.added = true;
                this.updateSession();

                if ( this.options.onAdd && ath.hasLocalStorage ) {	// double check on localstorage to avoid multiple calls to the custom event
                    this.options.onAdd.call(this);
                }
            }

            this.doLog("Add to homescreen: not displaying callout because in standalone mode");
            return;
        }

        // (try to) check if the page has been added to the homescreen
        if ( this.options.detectHomescreen ) {
            // the URL has the token, we are likely coming from the homescreen
            if ( ath.hasToken ) {
                _removeToken();		// we don't actually need the token anymore, we remove it to prevent redistribution

                // this is called the first time the user opens the app from the homescreen
                if ( !this.session.added ) {
                    this.session.added = true;
                    this.updateSession();

                    if ( this.options.onAdd && ath.hasLocalStorage ) {	// double check on localstorage to avoid multiple calls to the custom event
                        this.options.onAdd.call(this);
                    }
                }

                this.doLog("Add to homescreen: not displaying callout because URL has token, so we are likely coming from homescreen");
                return;
            }

            // URL doesn't have the token, so add it
            if ( this.options.detectHomescreen == 'hash' ) {
                history.replaceState('', window.document.title, document.location.href + '#ath');
            } else if ( this.options.detectHomescreen == 'smartURL' ) {
                history.replaceState('', window.document.title, document.location.href.replace(/(\/)?$/, '/ath$1'));
            } else {
                history.replaceState('', window.document.title, document.location.href + (document.location.search ? '&' : '?' ) + 'ath=');
            }
        }

        // check if this is a returning visitor
        if ( !this.session.returningVisitor ) {
            this.session.returningVisitor = true;
            this.updateSession();

            // we do not show the message if this is your first visit
            if ( this.options.skipFirstVisit ) {
                this.doLog("Add to homescreen: not displaying callout because skipping first visit");
                return;
            }
        }

        // we do no show the message in private mode
        if ( !this.options.privateModeOverride && !ath.hasLocalStorage ) {
            this.doLog("Add to homescreen: not displaying callout because browser is in private mode");
            return;
        }

        // all checks passed, ready to display
        this.ready = true;

        if ( this.options.onInit ) {
            this.options.onInit.call(this);
        }

        if ( this.options.autostart ) {
            this.doLog("Add to homescreen: autostart displaying callout");
            this.show();
        }
    };

    ath.Class.prototype = {
        // event type to method conversion
        events: {
            load: '_delayedShow',
            error: '_delayedShow',
            orientationchange: 'resize',
            resize: 'resize',
            scroll: 'resize',
            click: 'remove',
            touchmove: '_preventDefault',
            transitionend: '_removeElements',
            webkitTransitionEnd: '_removeElements',
            MSTransitionEnd: '_removeElements'
        },

        handleEvent: function (e) {
            var type = this.events[e.type];
            if ( type ) {
                this[type](e);
            }
        },

        show: function (force) {
            // in autostart mode wait for the document to be ready
            if ( this.options.autostart && !_DOMReady ) {
                setTimeout(this.show.bind(this), 50);
                // we are not displaying callout because DOM not ready, but don't log that because
                // it would log too frequently
                return;
            }

            // message already on screen
            if ( this.shown ) {
                this.doLog("Add to homescreen: not displaying callout because already shown on screen");
                return;
            }

            var now = Date.now();
            var lastDisplayTime = this.session.lastDisplayTime;

            if ( force !== true ) {
                // this is needed if autostart is disabled and you programmatically call the show() method
                if ( !this.ready ) {
                    this.doLog("Add to homescreen: not displaying callout because not ready");
                    return;
                }

                // we obey the display pace (prevent the message to popup too often)
                if ( now - lastDisplayTime < this.options.displayPace * 60000 ) {
                    this.doLog("Add to homescreen: not displaying callout because displayed recently");
                    return;
                }

                // obey the maximum number of display count
                if ( this.options.maxDisplayCount && this.session.displayCount >= this.options.maxDisplayCount ) {
                    this.doLog("Add to homescreen: not displaying callout because displayed too many times already");
                    return;
                }
            }

            this.shown = true;

            // increment the display count
            this.session.lastDisplayTime = now;
            this.session.displayCount++;
            this.updateSession();

            // try to get the highest resolution application icon
            if ( !this.applicationIcon ) {
                if ( ath.OS == 'ios' ) {
                    this.applicationIcon = document.querySelector('head link[rel^=apple-touch-icon][sizes="152x152"],head link[rel^=apple-touch-icon][sizes="144x144"],head link[rel^=apple-touch-icon][sizes="120x120"],head link[rel^=apple-touch-icon][sizes="114x114"],head link[rel^=apple-touch-icon]');
                } else {
                    this.applicationIcon = document.querySelector('head link[rel^="shortcut icon"][sizes="196x196"],head link[rel^=apple-touch-icon]');
                }
            }

            var message = '';

            if ( typeof this.options.message == 'object' && ath.language in this.options.message ) {		// use custom language message
                message = this.options.message[ath.language][ath.OS];
            } else if ( typeof this.options.message == 'object' && ath.OS in this.options.message ) {		// use custom os message
                message = this.options.message[ath.OS];
            } else if ( this.options.message in ath.intl ) {				// you can force the locale
                message = ath.intl[this.options.message][ath.OS];
            } else if ( this.options.message !== '' ) {						// use a custom message
                message = this.options.message;
            } else if ( ath.OS in ath.intl[ath.language] ) {				// otherwise we use our message
                message = ath.intl[ath.language][ath.OS];
            }

            // add the action icon
            message = '<p>' + message.replace(/%icon(?:\[([^\]]+)\])?/gi, function(matches, group1) {
                return '<span class="ath-action-icon">' + (!!group1 ? group1 : 'icon') + '</span>';
            }) + '</p>';

            // create the message container
            this.viewport = document.createElement('div');
            this.viewport.className = 'ath-viewport';
            if ( this.options.modal ) {
                this.viewport.className += ' ath-modal';
            }
            if ( this.options.mandatory ) {
                this.viewport.className += ' ath-mandatory';
            }
            this.viewport.style.position = 'absolute';

            // create the actual message element
            this.element = document.createElement('div');
            this.element.className = 'ath-container ath-' + ath.OS + ' ath-' + ath.OS + (parseInt(ath.OSVersion) || '') + ' ath-' + (ath.isTablet ? 'tablet' : 'phone');
            this.element.style.cssText = '-webkit-transition-property:-webkit-transform,opacity;-webkit-transition-duration:0s;-webkit-transition-timing-function:ease-out;transition-property:transform,opacity;transition-duration:0s;transition-timing-function:ease-out;';
            this.element.style.webkitTransform = 'translate3d(0,-' + window.innerHeight + 'px,0)';
            this.element.style.transform = 'translate3d(0,-' + window.innerHeight + 'px,0)';

            // add the application icon
            if ( this.options.icon && this.applicationIcon ) {
                this.element.className += ' ath-icon';
                this.img = document.createElement('img');
                this.img.className = 'ath-application-icon';
                this.img.addEventListener('load', this, false);
                this.img.addEventListener('error', this, false);

                this.img.src = this.applicationIcon.href;
                this.element.appendChild(this.img);
            }

            this.element.innerHTML += message;

            // we are not ready to show, place the message out of sight
            this.viewport.style.left = '-99999em';

            // attach all elements to the DOM
            this.viewport.appendChild(this.element);
            this.container.appendChild(this.viewport);

            // if we don't have to wait for an image to load, show the message right away
            if ( this.img ) {
                this.doLog("Add to homescreen: not displaying callout because waiting for img to load");
            } else {
                this._delayedShow();
            }
        },

        _delayedShow: function (e) {
            setTimeout(this._show.bind(this), this.options.startDelay * 1000 + 500);
        },

        _show: function () {
            var that = this;

            // update the viewport size and orientation
            this.updateViewport();

            // reposition/resize the message on orientation change
            window.addEventListener('resize', this, false);
            window.addEventListener('scroll', this, false);
            window.addEventListener('orientationchange', this, false);

            if ( this.options.modal ) {
                // lock any other interaction
                document.addEventListener('touchmove', this, true);
            }

            // Enable closing after 1 second
            if ( !this.options.mandatory ) {
                setTimeout(function () {
                    that.element.addEventListener('click', that, true);
                }, 1000);
            }

            // kick the animation
            setTimeout(function () {
                that.element.style.webkitTransitionDuration = '1.2s';
                that.element.style.transitionDuration = '1.2s';
                that.element.style.webkitTransform = 'translate3d(0,0,0)';
                that.element.style.transform = 'translate3d(0,0,0)';
            }, 0);

            // set the destroy timer
            if ( this.options.lifespan ) {
                this.removeTimer = setTimeout(this.remove.bind(this), this.options.lifespan * 1000);
            }

            // fire the custom onShow event
            if ( this.options.onShow ) {
                this.options.onShow.call(this);
            }
        },

        remove: function () {
            clearTimeout(this.removeTimer);

            // clear up the event listeners
            if ( this.img ) {
                this.img.removeEventListener('load', this, false);
                this.img.removeEventListener('error', this, false);
            }

            window.removeEventListener('resize', this, false);
            window.removeEventListener('scroll', this, false);
            window.removeEventListener('orientationchange', this, false);
            document.removeEventListener('touchmove', this, true);
            this.element.removeEventListener('click', this, true);

            // remove the message element on transition end
            this.element.addEventListener('transitionend', this, false);
            this.element.addEventListener('webkitTransitionEnd', this, false);
            this.element.addEventListener('MSTransitionEnd', this, false);

            // start the fade out animation
            this.element.style.webkitTransitionDuration = '0.3s';
            this.element.style.opacity = '0';
        },

        _removeElements: function () {
            this.element.removeEventListener('transitionend', this, false);
            this.element.removeEventListener('webkitTransitionEnd', this, false);
            this.element.removeEventListener('MSTransitionEnd', this, false);

            // remove the message from the DOM
            this.container.removeChild(this.viewport);

            this.shown = false;

            // fire the custom onRemove event
            if ( this.options.onRemove ) {
                this.options.onRemove.call(this);
            }
        },

        updateViewport: function () {
            if ( !this.shown ) {
                return;
            }

            this.viewport.style.width = window.innerWidth + 'px';
            this.viewport.style.height = window.innerHeight + 'px';
            this.viewport.style.left = window.scrollX + 'px';
            this.viewport.style.top = window.scrollY + 'px';

            var clientWidth = document.documentElement.clientWidth;

            this.orientation = clientWidth > document.documentElement.clientHeight ? 'landscape' : 'portrait';

            var screenWidth = ath.OS == 'ios' ? this.orientation == 'portrait' ? screen.width : screen.height : screen.width;
            this.scale = screen.width > clientWidth ? 1 : screenWidth / window.innerWidth;

            this.element.style.fontSize = this.options.fontSize / this.scale + 'px';
        },

        resize: function () {
            clearTimeout(this.resizeTimer);
            this.resizeTimer = setTimeout(this.updateViewport.bind(this), 100);
        },

        updateSession: function () {
            if ( ath.hasLocalStorage === false ) {
                return;
            }

            if (localStorage) {
                localStorage.setItem(this.options.appID, JSON.stringify(this.session));
            }
        },

        clearSession: function () {
            this.session = _defaultSession;
            this.updateSession();
        },

        getItem: function(item) {
            try {
                if (!localStorage) {
                    throw new Error('localStorage is not defined');
                }

                return localStorage.getItem(item);
            } catch(e) {
                // Preventing exception for some browsers when fetching localStorage key
                ath.hasLocalStorage = false;
            }
        },

        optOut: function () {
            this.session.optedout = true;
            this.updateSession();
        },

        optIn: function () {
            this.session.optedout = false;
            this.updateSession();
        },

        clearDisplayCount: function () {
            this.session.displayCount = 0;
            this.updateSession();
        },

        _preventDefault: function (e) {
            e.preventDefault();
            e.stopPropagation();
        }
    };

// utility
    function _extend (target, obj) {
        for ( var i in obj ) {
            target[i] = obj[i];
        }

        return target;
    }

    function _removeToken () {
        if ( document.location.hash == '#ath' ) {
            history.replaceState('', window.document.title, document.location.href.split('#')[0]);
        }

        if ( _reSmartURL.test(document.location.href) ) {
            history.replaceState('', window.document.title, document.location.href.replace(_reSmartURL, '$1'));
        }

        if ( _reQueryString.test(document.location.search) ) {
            history.replaceState('', window.document.title, document.location.href.replace(_reQueryString, '$2'));
        }
    }

// expose to the world
    window.addToHomescreen = ath;

})(window, document);