/*
 * jquery.socialshareprivacy.js | 2 Klicks fuer mehr Datenschutz
 *
 * http://www.heise.de/extras/socialshareprivacy/
 * http://www.heise.de/ct/artikel/2-Klicks-fuer-mehr-Datenschutz-1333879.html
 *
 * Copyright (c) 2011 Hilko Holweg, Sebastian Hilbig, Nicolas Heiringhoff, Juergen Schmidt,
 * Heise Zeitschriften Verlag GmbH & Co. KG, http://www.heise.de
 *
 * is released under the MIT License http://www.opensource.org/licenses/mit-license.php
 *
 * Spread the word, link to us if you can.
 */
(function($){
    $.fn.socialSharePrivacy = function(options){
        var defaults = {
            'services' : {
                'facebook' : {
                    'status'            : 'on',
                    'app_id'            : '218609274863192&xfbml',
                    'dummy_img'         : '/javascript/2click/socialshareprivacy/images/dummy_facebook.png',
                    'txt_info'          : '2 Klicks f&uuml;r mehr Datenschutz: Erst wenn Sie hier klicken, wird der Button aktiv und Sie k&ouml;nnen Ihre Empfehlung an Facebook senden. Schon beim Aktivieren werden Daten an Dritte &uuml;bertragen &ndash; siehe <em>i</em>.',
                    'txt_fb_off'        : 'nicht mit Facebook verbunden',
                    'txt_fb_on'         : 'mit Facebook verbunden',
                    'perma_option'      : 'on',
                    'display_name'      : 'Facebook',
                    'referrer_track'    : '',
                    'language'          : 'de_DE'
                }, 
                'twitter' : {
                    'status'            : 'on', 
                    'dummy_img'         : '/javascript/2click/socialshareprivacy/images/dummy_twitter.png',
                    'txt_info'          : '2 Klicks f&uuml;r mehr Datenschutz: Erst wenn Sie hier klicken, wird der Button aktiv und Sie k&ouml;nnen Ihre Empfehlung an Twitter senden. Schon beim Aktivieren werden Daten an Dritte &uuml;bertragen &ndash; siehe <em>i</em>.',
                    'txt_twitter_off'   : 'nicht mit Twitter verbunden',
                    'txt_twitter_on'    : 'mit Twitter verbunden',
                    'perma_option'      : 'on',
                    'display_name'      : 'Twitter',
                    'referrer_track'    : '', 
                    'tweet_text'        : getTweetText
                },
                'gplus' : {
                    'status'            : 'on',
                    'dummy_img'         : '/javascript/2click/socialshareprivacy/images/dummy_gplus.png',
                    'txt_info'          : '2 Klicks f&uuml;r mehr Datenschutz: Erst wenn Sie hier klicken, wird der Button aktiv und Sie k&ouml;nnen Ihre Empfehlung an Google+ senden. Schon beim Aktivieren werden Daten an Dritte &uuml;bertragen &ndash; siehe <em>i</em>.',
                    'txt_gplus_off'     : 'nicht mit Google+ verbunden',
                    'txt_plus_on'       : 'mit Google+ verbunden',
                    'perma_option'      : 'on',
                    'display_name'      : 'Google+',
                    'referrer_track'    : '',
                    'language'          : 'de'
                }
            },
            'info_link'         : 'http://www.heise.de/ct/artikel/2-Klicks-fuer-mehr-Datenschutz-1333879.html',
            'txt_help'          : 'Wenn Sie diese Felder durch einen Klick aktivieren, werden Informationen an Facebook, Twitter oder Google in die USA &uuml;bertragen und unter Umst&auml;nden auch dort gespeichert. N&auml;heres erfahren Sie durch einen Klick auf das <em>i</em>.',
            'settings_perma'    : 'Dauerhaft aktivieren und Daten&uuml;ber&shy;tragung zustimmen:',
            'cookie_path'       : '/',
            'cookie_domain'     : document.location.host,
            'cookie_expires'    : '365',
            'css_path'          : '/javascript/2click/socialshareprivacy/socialshareprivacy.css'
        };

        // Standardwerte des Plug-Ings mit den vom User angegebenen Optionen ueberschreiben
        var options = $.extend(true, defaults, options);

        if((options.services.facebook.status == 'on' && options.services.facebook.app_id != '__FB_APP-ID__') || options.services.twitter.status == 'on' || options.services.gplusone.status == 'on'){
            $('head').append('<link rel="stylesheet" type="text/css" href="'+options.css_path+'" />');
            $(this).prepend('<ul class="social_share_privacy_area"></ul>');
            var context = $('.social_share_privacy_area', this);
            
            // als URL wird erstmal die derzeitige Dokument-URL angenommen
            var uri = document.location.href;
            
            // ist eine kanonische URL hinterlegt wird diese verwendet
            var canonical = $('link[rel="canonical"]').attr("href");
            if (canonical && canonical.length > 0) {
                if (canonical.indexOf("http") < 0) {
                    canonical = document.location.protocol + "//" + document.location.host + canonical;
                }
                uri = canonical;
            }
        }

        // Text kuerzen und am Ende mit \u2026 (horizontal ellipsis) versehen, sofern er abgekuerzt werden musste
        function abbreviateText(text, length){
            var abbreviated = decodeURIComponent(text);
            if(abbreviated.length <= length){
                return text;
            }

            var lastWhitespaceIndex = abbreviated.substring(0, length - 1).lastIndexOf(' ');
            abbreviated = encodeURIComponent(abbreviated.substring(0, lastWhitespaceIndex)) + "\u2026";

            return abbreviated;
        }

        // Meta-Wert abfragen
        function getMeta(name){
            var metaContent = jQuery('meta[name="' + name + '"]').attr('content');
            return metaContent ? metaContent : '';
        }
        
        // Tweet-Text
        function getTweetText(){
            // Titel aus <meta name="DC.title"> und <meta name="DC.creator"> wenn vorhanden, sonst <title>
            var title = getMeta('DC.title');
            var creator = getMeta('DC.creator');
            if(title.length > 0){
                if(creator.length > 0){
                    title = title+' - '+creator;
                }
            }
            else{
                title = $('title').text();
            }
            return encodeURIComponent(title);
        }

        return this.each(function(){
            // Facebook
            if(options.services.facebook.status == 'on'){
                // Kontrolle ob Facebook App-ID hinterlegt ist, da diese noetig fuer den Empfehlen-Button ist
                if(options.services.facebook.app_id != '__FB_APP-ID__'){
                    var fb_enc_uri = encodeURIComponent(uri+options.services.facebook.referrer_track);
                    var fb_code = '<iframe src="http://www.facebook.com/plugins/like.php?locale='+options.services.facebook.language+'&amp;app_id='+options.services.facebook.app_id+'&amp;href='+fb_enc_uri+'&amp;send=false&amp;layout=button_count&amp;width=120&amp;show_faces=false&amp;action=recommend&amp;colorscheme=light&amp;font&amp;height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden;" allowTransparency="true"></iframe>';
                    var fb_dummy_btn = '<img src="'+options.services.facebook.dummy_img+'" alt="Facebook &quot;Like&quot;-Dummy" class="fb_like_privacy_dummy" />';

                    context.append('<li class="facebook help_info"><span class="info">'+options.services.facebook.txt_info+'</span><span class="switch off">'+options.services.facebook.txt_fb_off+'</span><div class="fb_like dummy_btn">'+fb_dummy_btn+'</div></li>');

                    var $container_fb = $('li.facebook', context);

                    $('li.facebook div.fb_like img.fb_like_privacy_dummy,li.facebook span.switch', context).live('click', function(){
                        if($container_fb.find('span.switch').hasClass('off')){
                            $container_fb.addClass('info_off');
                            $container_fb.find('span.switch').addClass('on').removeClass('off').html(options.services.facebook.txt_fb_on);
                            $container_fb.find('img.fb_like_privacy_dummy').replaceWith(fb_code);
                        }
                        else{
                            $container_fb.removeClass('info_off');
                            $container_fb.find('span.switch').addClass('off').removeClass('on').html(options.services.facebook.txt_fb_off);
                            $container_fb.find('.fb_like').html(fb_dummy_btn);
                        }
                    });
                }
                else{
                    try{
                        console.log('Fehler: Es ist keine Facebook App-ID hinterlegt.');
                    }
                    catch(e){ }
                }
            }

            // Twitter
            if(options.services.twitter.status == 'on'){
                // 120 = Restzeichen-Anzahl nach automatischem URL-Kuerzen durch Twitter mit t.co
                var text = options.services.twitter.tweet_text;
                if(typeof(text) == 'function'){
                    text = text();
                }
                text = abbreviateText(text,'120');
                
                var twitter_enc_uri = encodeURIComponent(uri+options.services.twitter.referrer_track);
                var twitter_count_url = encodeURIComponent(uri);
                var twitter_code = '<iframe allowtransparency="true" frameborder="0" scrolling="no" src="http://platform.twitter.com/widgets/tweet_button.html?url='+twitter_enc_uri+'&amp;counturl='+twitter_count_url+'&amp;text='+text+'&amp;count=horizontal"></iframe>';
                var twitter_dummy_btn = '<img src="'+options.services.twitter.dummy_img+'" alt="&quot;Tweet this&quot;-Dummy" class="tweet_this_dummy" />';
                
                context.append('<li class="twitter help_info"><span class="info">'+options.services.twitter.txt_info+'</span><span class="switch off">'+options.services.twitter.txt_twitter_off+'</span><div class="tweet dummy_btn">'+twitter_dummy_btn+'</div></li>');

                var $container_tw = $('li.twitter', context);
                
                $('li.twitter div.tweet img,li.twitter span.switch', context).live('click', function(){
                    if($container_tw.find('span.switch').hasClass('off')){
                        $container_tw.addClass('info_off');
                        $container_tw.find('span.switch').addClass('on').removeClass('off').html(options.services.twitter.txt_twitter_on);
                        $container_tw.find('img.tweet_this_dummy').replaceWith(twitter_code);
                    }
                    else{
                        $container_tw.removeClass('info_off');
                        $container_tw.find('span.switch').addClass('off').removeClass('on').html(options.services.twitter.txt_twitter_off);
                        $container_tw.find('.tweet').html(twitter_dummy_btn);
                    }
                });
            }

            // Google+
            if(options.services.gplus.status == 'on'){
                // fuer G+ wird die URL nicht encoded, da das zu einem Fehler fuehrt
                var gplus_uri = uri+options.services.gplus.referrer_track;
                var gplus_code = '<div class="g-plusone" data-size="medium" data-href="'+gplus_uri+'"></div><script type="text/javascript">window.___gcfg = {lang: "'+options.services.gplus.language+'"}; (function(){ var po = document.createElement("script"); po.type = "text/javascript"; po.async = true; po.src = "https://apis.google.com/js/plusone.js"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(po, s); })(); </script>';
                var gplus_dummy_btn = '<img src="'+options.services.gplus.dummy_img+'" alt="&quot;Google+1&quot;-Dummy" class="gplus_one_dummy" />';

                context.append('<li class="gplus help_info"><span class="info">'+options.services.gplus.txt_info+'</span><span class="switch off">'+options.services.gplus.txt_gplus_off+'</span><div class="gplusone dummy_btn">'+gplus_dummy_btn+'</div></li>');

                var $container_gplus = $('li.gplus', context);

                $('li.gplus div.gplusone img,li.gplus span.switch', context).live('click', function(){
                    if($container_gplus.find('span.switch').hasClass('off')){
                        $container_gplus.addClass('info_off');
                        $container_gplus.find('span.switch').addClass('on').removeClass('off').html(options.services.gplus.txt_gplus_on);
                        $container_gplus.find('img.gplus_one_dummy').replaceWith(gplus_code);
                    }
                    else{
                        $container_gplus.removeClass('info_off');
                        $container_gplus.find('span.switch').addClass('off').removeClass('on').html(options.services.gplus.txt_gplus_off);
                        $container_gplus.find('.gplusone').html(gplus_dummy_btn);
                    }
                });
            }

            // Der Info/Settings-Bereich wird eingebunden
            context.append('<li class="settings_info"><div class="settings_info_menu off perma_option_off"><a href="'+options.info_link+'"><span class="help_info icon"><span class="info">'+options.txt_help+'</span></span></a></div></li>');

            // Info-Overlays mit leichter Verzoegerung einblenden
            $('.help_info:not(.info_off)', context).live('mouseenter', function(){
                var $info_wrapper = $(this);
                var timeout_id = window.setTimeout(function(){ $($info_wrapper).addClass('display'); }, 500);
                $(this).data('timeout_id',timeout_id);
            });
            $('.help_info', context).live('mouseleave', function(){
                var timeout_id = $(this).data('timeout_id');
                window.clearTimeout(timeout_id);
                if($(this).hasClass('display')){
                    $(this).removeClass('display');
                }
            });

            // Menue zum dauerhaften Einblenden der aktiven Dienste via Cookie einbinden
            // Die IE7 wird hier ausgenommen, da er kein JSON kann und die Cookies hier ueber JSON-Struktur abgebildet werden
            if(((options.services.facebook.status == 'on' && options.services.facebook.perma_option == 'on' && options.services.facebook.app_id != '__FB_APP-ID__') || (options.services.twitter.status == 'on' && options.services.twitter.perma_option == 'on') || (options.services.gplus.status == 'on' && options.services.gplus.perma_option == 'on')) && (($.browser.msie && $.browser.version > 7.0) || !$.browser.msie)){
                // Cookies abrufen
                var cookie_list = document.cookie.split(';');
                var cookies = '{';
                for(var i = 0; i < cookie_list.length; i++){
                    var foo = cookie_list[i].split('=');
                    cookies+='"'+$.trim(foo[0])+'":"'+$.trim(foo[1])+'"';
                    if(i < cookie_list.length-1){
                        cookies += ',';
                    }
                }
                cookies += '}';
                cookies = JSON.parse(cookies);


                // Cookie setzen
                function cookieSet(name,value,days,path,domain){
                    var expires = new Date();
                    expires.setTime(expires.getTime() + (days * 24 * 60 * 60 * 1000));
                    document.cookie = name+'='+value+'; expires='+expires.toUTCString()+'; path='+path+'; domain='+domain;
                }

                // Cookie loeschen
                function cookieDel(name,value){
                    var expires = new Date();
                    expires.setTime(expires.getTime() - 100);
                    document.cookie = name+'='+value+'; expires='+expires.toUTCString()+'; path='+options.cookie_path+'; domain='+options.cookie_domain;
                }

                // Container definieren
                var $container_settings_info = $('li.settings_info', context);

                // Klasse entfernen, die das i-Icon alleine formatiert, da Perma-Optionen eingeblendet werden
                $container_settings_info.find('.settings_info_menu').removeClass('perma_option_off');

                // Perma-Optionen-Icon (.settings) und Formular (noch versteckt) einbinden
                $container_settings_info.find('.settings_info_menu').append('<span class="settings">Einstellungen</span><form><fieldset><legend>'+options.settings_perma+'</legend></fieldset></form>');

                // Die Dienste mit <input> und <label>, sowie checked-Status laut Cookie, schreiben
                if(options.services.facebook.status == 'on' && options.services.facebook.perma_option == 'on' && options.services.facebook.app_id != '__FB_APP-ID__'){
                    var perma_status_facebook = '';
                    cookies.socialSharePrivacy_facebook == 'perma_on' ? perma_status_facebook = ' checked="checked"' : perma_status_facebook = '';
                    $container_settings_info.find('form fieldset').append('<input type="checkbox" name="perma_status_facebook" id="perma_status_facebook"'+perma_status_facebook+' /><label for="perma_status_facebook">'+options.services.facebook.display_name+'</label>');
                }
                if(options.services.twitter.status == 'on' && options.services.twitter.perma_option == 'on'){
                    var perma_status_twitter = '';
                    cookies.socialSharePrivacy_twitter == 'perma_on' ? perma_status_twitter = ' checked="checked"' : perma_status_twitter = '';
                    $container_settings_info.find('form fieldset').append('<input type="checkbox" name="perma_status_twitter" id="perma_status_twitter"'+perma_status_twitter+' /><label for="perma_status_twitter">'+options.services.twitter.display_name+'</label>');
                }
                if(options.services.gplus.status == 'on' && options.services.gplus.perma_option == 'on'){
                    var perma_status_gplus = '';
                    cookies.socialSharePrivacy_gplus == 'perma_on' ? perma_status_gplus = ' checked="checked"' : perma_status_gplus = '';
                    $container_settings_info.find('form fieldset').append('<input type="checkbox" name="perma_status_gplus" id="perma_status_gplus"'+perma_status_gplus+' /><label for="perma_status_gplus">'+options.services.gplus.display_name+'</label>');
                }

                // Cursor auf Pointer setzen fuer das Zahnrad
                $container_settings_info.find('span.settings').css('cursor','pointer');

                // Einstellungs-Menue bei mouseover ein-/ausblenden
                $($container_settings_info.find('span.settings'), context).live('mouseenter', function(){
                    var timeout_id = window.setTimeout(function(){ $container_settings_info.find('.settings_info_menu').removeClass('off').addClass('on'); }, 500);
                    $(this).data('timeout_id',timeout_id);
                }); 
                $($container_settings_info, context).live('mouseleave', function(){
                    var timeout_id = $(this).data('timeout_id');
                    window.clearTimeout(timeout_id);
                    $container_settings_info.find('.settings_info_menu').removeClass('on').addClass('off');
                });

                // Klick-Interaktion auf <input> um Dienste dauerhaft ein- oder auszuschalten (Cookie wird gesetzt oder geloescht)
                $($container_settings_info.find('fieldset input')).live('click', function(event){
                    var value;
                    var click = event.target.id;
                    service = click.substr(click.lastIndexOf('_')+1, click.length);

                    $('#'+event.target.id+':checked').length ? value = 'on' : value = 'off';

                    var cookie_name = 'socialSharePrivacy_'+service;

                    if(value == 'on'){
                        // Cookie setzen
                        cookieSet(cookie_name,'perma_on',options.cookie_expires,options.cookie_path,options.cookie_domain);
                        $('form fieldset label[for='+click+']', context).addClass('checked');
                    }
                    else{
                        // Cookie loeschen
                        cookieDel(cookie_name,'perma_on');
                        $('form fieldset label[for='+click+']', context).removeClass('checked');
                    }
                });

                // Dienste automatisch einbinden, wenn entsprechendes Cookie vorhanden ist
                if(options.services.facebook.status == 'on' && options.services.facebook.perma_option == 'on' && cookies.socialSharePrivacy_facebook == 'perma_on' && options.services.facebook.app_id != '__FB_APP-ID__'){
                    $('li.facebook span.switch', context).click();
                }
                if(options.services.twitter.status == 'on' && options.services.twitter.perma_option == 'on' && cookies.socialSharePrivacy_twitter == 'perma_on'){
                    $('li.twitter span.switch', context).click();
                }
                if(options.services.gplus.status == 'on' && options.services.gplus.perma_option == 'on' && cookies.socialSharePrivacy_gplus == 'perma_on'){
                    $('li.gplus span.switch', context).click();
                }
            }
        });
    }
})(jQuery);