/*
 * 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 ($) {

   "use strict";

   /*
	 * helper functions
	 */

   // abbreviate at last blank before length and add "\u2026" (horizontal ellipsis)
   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;
   }

   // returns content of <meta name="" content=""> tags or '' if empty/non existant
   function getMeta(name) {
      var metaContent = $('meta[name="' + name + '"]').attr('content');
      return metaContent || '';
   }

   // create tweet text from content of <meta name="DC.title"> and <meta name="DC.creator">
   // fallback to content of <title> tag
   function getTweetText() {
      var title = getMeta('DC.title');
      var creator = getMeta('DC.creator');

      if (title.length > 0 && creator.length > 0) {
         title += ' - ' + creator;
      } else {
         title = $('title').text();
      }

      return encodeURIComponent(title);
   }

   // build URI from rel="canonical" or document.location
   function getURI() {
      var uri = document.location.href;
      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;
      }

      return uri;
   }

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

   // extend jquery with our plugin function
   $.fn.socialSharePrivacy = function (settings) {
      var defaults = {
         'services' : {
            'facebook' : {
               'status'            : 'on',
               'app_id'            : '__FB_APP-ID__',
               'dummy_img'         : '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',
               'action'            : 'recommend'
            },
            'twitter' : {
               'status'            : 'on',
               'dummy_img'         : '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,
               'language'          : 'en'
            },
            'gplus' : {
               'status'            : 'on',
               'dummy_img'         : '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_gplus_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'          : 'socialshareprivacy/socialshareprivacy.css',
         'uri'               : getURI
      };

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

      var facebook_on = (options.services.facebook.status === 'on' && options.services.facebook.app_id !== '__FB_APP-ID__');
      var twitter_on  = (options.services.twitter.status  === 'on');
      var gplus_on    = (options.services.gplus.status    === 'on');

      // check if at least one service is "on" and FB-App-ID is set if needed
      if (!facebook_on && !twitter_on && !gplus_on) {
         return;
      }

      // insert stylesheet into document and prepend target element
      if (options.css_path.length > 0) {
         $('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);

      // canonical uri that will be shared
      var uri = options.uri;
      if (typeof uri === 'function') {
         uri = uri();
      }

      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__') {
               try {
                  console.log('Fehler: Es ist keine Facebook App-ID hinterlegt.');
               } catch (e) { }
            } else {
               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=' + options.services.facebook.action + '&amp;colorscheme=light&amp;font&amp;height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:145px; height:21px;" allowTransparency="true"></iframe>';
               var fb_code = '<iframe src="//www.facebook.com/plugins/like.php?href=http%3A%2F%2Fwww.facebook.com%2FKolpingAkademieMuenchen&amp;send=false&amp;layout=button_count&amp;width=140&amp;show_faces=false&amp;action=like&amp;colorscheme=light&amp;font&amp;height=21" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:140px; height:21px;" 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);
                  }
               });
            }
         }

         //
         // Twitter
         //
         if (twitter_on) {
            var text = options.services.twitter.tweet_text;
            if (typeof text === 'function') {
               text = text();
            }
            // 120 is the max character count left after twitters automatic url shortening with t.co
            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&amp;lang=' + options.services.twitter.language + '" style="width:130px; height:25px;"></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 (gplus_on) {
            // fuer G+ wird die URL nicht encoded, da das zu einem Fehler fuehrt
            var gplus_uri = uri + options.services.gplus.referrer_track;

            // we use the Google+ "asynchronous" code, standard code is flaky if inserted into dom after load
            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');
            }
         });

         var facebook_perma = (options.services.facebook.perma_option === 'on');
         var twitter_perma  = (options.services.twitter.perma_option  === 'on');
         var gplus_perma    = (options.services.gplus.perma_option    === 'on');

         // 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 (((facebook_on && facebook_perma)
            || (twitter_on && twitter_perma)
            || (gplus_on && gplus_perma))
         && (!$.browser.msie || ($.browser.msie && $.browser.version > 7.0))) {

            // Cookies abrufen
            var cookie_list = document.cookie.split(';');
            var cookies = '{';
            var i = 0;
            for (; i < cookie_list.length; i += 1) {
               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);

            // 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
            var checked = ' checked="checked"';
            if (facebook_on && facebook_perma) {
               var perma_status_facebook = cookies.socialSharePrivacy_facebook === 'perma_on' ? checked : '';
               $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 (twitter_on && twitter_perma) {
               var perma_status_twitter = cookies.socialSharePrivacy_twitter === 'perma_on' ? checked : '';
               $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 (gplus_on && gplus_perma) {
               var perma_status_gplus = cookies.socialSharePrivacy_gplus === 'perma_on' ? checked : '';
               $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 click = event.target.id;
               var service = click.substr(click.lastIndexOf('_') + 1, click.length);
               var cookie_name = 'socialSharePrivacy_' + service;

               if ($('#' + event.target.id + ':checked').length) {
                  cookieSet(cookie_name, 'perma_on', options.cookie_expires, options.cookie_path, options.cookie_domain);
                  $('form fieldset label[for=' + click + ']', context).addClass('checked');
               } else {
                  cookieDel(cookie_name, 'perma_on', options.cookie_path, options.cookie_domain);
                  $('form fieldset label[for=' + click + ']', context).removeClass('checked');
               }
            });

            // Dienste automatisch einbinden, wenn entsprechendes Cookie vorhanden ist
            if (facebook_on && facebook_perma && cookies.socialSharePrivacy_facebook === 'perma_on') {
               $('li.facebook span.switch', context).click();
            }
            if (twitter_on && twitter_perma && cookies.socialSharePrivacy_twitter === 'perma_on') {
               $('li.twitter span.switch', context).click();
            }
            if (gplus_on && gplus_perma && cookies.socialSharePrivacy_gplus === 'perma_on') {
               $('li.gplus span.switch', context).click();
            }
         }
      }); // this.each(function ()
   };      // $.fn.socialSharePrivacy = function (settings) {
}(jQuery));