/*
 * 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";

 // 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'         : 'http://'+document.location.host+'/images/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. Mit Aktivierung werden Daten an Dritte   &uuml;bertragen.',
                    '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'            : 'like'
                }
            },
            '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 in die USA &uuml;bertragen und unter Umst&auml;nden auch dort gespeichert.',
            'settings_perma'    : 'Dauerhaft aktivieren und Daten&uuml;ber&shy;tragung zustimmen:',
            'cookie_path'       : '/',
            'cookie_domain'     : document.location.host,
            'cookie_expires'    : '365',
            'css_path'          : 'http://'+document.location.host+'/css/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__');


        // check if at least one service is "on" and FB-App-ID is set if needed
        if (!facebook_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:110px; 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);
                        }
                    });
                }
            }

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

        }); // this.each(function ()
    };      // $.fn.socialSharePrivacy = function (settings) {
}(jQuery));