/************************************************************************************************************************************
 *  fb.wall             Facebook Wall jQuery Plguin
 *
 *  @author:            Daniel Benkenstein / neosmart GmbH
 *  @version:           1.2.7
 *  @Last Update:       06.06.2011
 *  @licence:           MIT (http://www.opensource.org/licenses/mit-license.php)
 *                      GPL (http://www.gnu.org/licenses/gpl.html)
 *  @documentation:     http://www.neosmart.de/social-media/facebook-wall
 *  @feedback:          http://www.neosmart.de/blog/jquery-plugin-facebook-wall
 *  
 ************************************************************************************************************************************/

(function($) {
    
    $.fn.fbWall = function(options) {
        
        var opts = $.extend({}, $.fn.fbWall.defaults, options);
        var meta = this;
        
        return meta.each(function() {
            $this = $(this);
            var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
            var output = '';
            var avatarBaseURL;
            var baseData;
            var graphURL = "https://graph.facebook.com/";
            
            /******************************************************************************************************
             * Load base data
             ******************************************************************************************************/
             
            meta.addClass('fb-wall').addClass('loading').html('');
            $.ajax({
                url: graphURL+o.id+'?access_token='+o.accessToken,
                dataType: "jsonp",
                success: function(data, textStatus, XMLHttpRequest){
                    initBase(data);
                }
            });
            
            /******************************************************************************************************
             * Load feed data
             ******************************************************************************************************/
             
            var initBase = function(data){
                baseData = data;
                
                if(data==false){
                    meta.removeClass('loading').html('The alias you requested do not exist: '+o.id);
                    return false;
                };
                
                if(data.error){
                    meta.removeClass('loading').html(data.error.message);
                    return false;
                };
                
                var type = (o.showGuestEntries=='true'||o.showGuestEntries==true) ? 'feed' : 'posts';
                $.ajax({
                    url: graphURL+o.id+"/"+type+"?limit="+o.max+'&access_token='+o.accessToken,
                    dataType: "jsonp",
                    success:function (data, textStatus, XMLHttpRequest) {
                        meta.removeClass('loading');
                        initWall(data);
                    }
                });
            }
    
            /******************************************************************************************************
             * Parse feed data / wall
             ******************************************************************************************************/
             
            var initWall = function(data){
                
                data = data.data;
                
                var max = data.length;
                var thisAvatar, isBase, hasBaseLink, thisDesc;
                
                for(var k=0;k<max;k++){

                    // Shortcut ------------------------------------------------------------------------------------------------------------------------------
                    isBase = (data[k].from.id==baseData.id);
                    hasBaseLink = isBase&&(exists(baseData.link));
                    if(!o.showGuestEntries&&!isBase) continue;
                    
                    // Box -----------------------------------------------------------------------------------------------------------------------------------
                    output += (k==0) ? '<div class="fb-wall-box fb-wall-box-first">' : '<div class="fb-wall-box">';
                    output += '<a href="http://www.facebook.com/profile.php?id='+data[k].from.id+'" target="_blank">';
                    output += '<img class="fb-wall-avatar" src="'+getAvatarURL(data[k].from.id)+'" />';
                    output += '</a>';
                    output += '<div class="fb-wall-data">';
                    
                    output += '<span class="fb-wall-message">';
                    output += '<a href="http://www.facebook.com/profile.php?id='+data[k].from.id+'" class="fb-wall-message-from" target="_blank">'+data[k].from.name+'</a> ';
                    if(exists(data[k].message)) output += modText(data[k].message);
                    output += '</span>';
                    
                    // Media -----------------------------------------------------------------------------------------------------------------------------------
                    if(exists(data[k].picture)||exists(data[k].link)||exists(data[k].caption)||exists(data[k].description)){
                        output += exists(data[k].picture) ? '<div class="fb-wall-media">' : '<div class="fb-wall-media fb-wall-border-left">';
                        if(exists(data[k].picture)){
                            if(exists(data[k].link)) output += '<a href="'+data[k].link+'" target="_blank" class="fb-wall-media-link">';
                            output += '<img class="fb-wall-picture" src="'+data[k].picture+'" />';
                            if(exists(data[k].link)) output += '</a>';
                        }
                        output += '<div class="fb-wall-media-container">';
                        if(exists(data[k].name)) output += '<a class="fb-wall-name" href="'+data[k].link+'" target="_blank">'+data[k].name+'</a>';
                        if(exists(data[k].caption)) output += '<a class="fb-wall-caption" href="http://'+data[k].caption+'" target="_blank">'+data[k].caption+'</a>';
                        if(exists(data[k].properties)){
                            for(var p=0;p<data[k].properties.length;p++) output += (p==0) ? '<div>'+formatDate(data[k].properties[p].text)+'</div>' : '<div>'+data[k].properties[p].text+'</div>';
                        }
                        if(exists(data[k].description)){
                            thisDesc = modText(data[k].description);
                            if(thisDesc.length>299)thisDesc=thisDesc.substr(0,thisDesc.lastIndexOf(' '))+' ...';
                            output += '<span class="fb-wall-description">'+thisDesc+'</span>';
                        }
                        output += '</div>';
                        output += '</div>';
                    }
                    output += '<span class="fb-wall-date">';
                    if(exists(data[k].icon)) output += '<img class="fb-wall-icon" src="'+data[k].icon+'" title="'+data[k].type+'" alt="" />';
                    output += formatDate(data[k].created_time)+'</span>';                   
                
                    // Likes -------------------------------------------------------------------------------------------------------------------------------
                    if(exists(data[k].likes)){
                        if(parseInt(data[k].likes.count)==1){
                            output += '<div class="fb-wall-likes"><div><span>'+data[k].likes.data[0].name+'</span> '+o.translateLikesThis+'</div> </div>';
                        } else {
                            output += '<div class="fb-wall-likes"><div><span>'+data[k].likes.count+' '+o.translatePeople+'</span> '+o.translateLikeThis+'</div> </div>';
                        }
                    }
                    
                    // Comments -------------------------------------------------------------------------------------------------------------------------------
                    if(exists(data[k].comments) && exists(data[k].comments.data) && (o.showComments==true||o.showComments=='true')){
                                                
                        output += '<div class="fb-wall-comments">';
                        for(var c=0;c<data[k].comments.data.length;c++){
                            output += '<span class="fb-wall-comment">';
                            output += '<a href="http://www.facebook.com/profile.php?id='+data[k].comments.data[c].from.id+'" class="fb-wall-comment-avatar" target="_blank">';
                            output += '<img src="'+getAvatarURL(data[k].comments.data[c].from.id)+'" />';
                            output += '</a>';
                            output += '<span class="fb-wall-comment-message">';
                            output += '<a class="fb-wall-comment-from-name" href="http://www.facebook.com/profile.php?id='+data[k].comments.data[c].from.id+'" target="_blank">'+data[k].comments.data[c].from.name+'</a> ';
                            output += modText(data[k].comments.data[c].message);
                            output += '<span class="fb-wall-comment-from-date">'+formatDate(data[k].comments.data[c].created_time)+'</span>';
                            output += '</span>';
                            output += '</span>';
                        }
                        output += '</div>';
                    }
                    
                    output += '</div>';
                    output += '<div class="fb-wall-clean"></div>';
                    output += '</div>';
                }
                
                // No data found --------------------------------------------------------------------------------------------
                if(max==0){
                    output += '<div class="fb-wall-box-first">';
                    output += '<img class="fb-wall-avatar" src="'+getAvatarURL(baseData.id)+'" />';
                    output += '<div class="fb-wall-data">';
                    output += '<span class="fb-wall-message"><span class="fb-wall-message-from">'+baseData.name+'</span> '+o.translateErrorNoData+'</span>';
                    output += '</div>';
                    output += '</div>';
                }
                meta.hide().html(output).fadeIn(700);
            }
            
            /******************************************************************************************************
             * Get Avatar URLs
             ******************************************************************************************************/
            
            function getAvatarURL(id){
                var avatarURL;
                if(id==baseData.id){ avatarURL = (o.useAvatarAlternative) ? o.avatarAlternative : graphURL+id+'/picture?type=square'; }
                else{ avatarURL = (o.useAvatarExternal) ? o.avatarExternal : graphURL+id+'/picture?type=square'; }
                return avatarURL;
            }
                        
            /******************************************************************************************************
             * Parse dateStr as formatted date
             * @return: if dateStr can't be parsed as Date, return dateStr
             ******************************************************************************************************/
             
            function formatDate(dateStr){
                var year, month, day, hour, minute, dateUTC, date, ampm, d, time;
                var iso = (dateStr.indexOf(' ')==-1&&dateStr.substr(4,1)=='-'&&dateStr.substr(7,1)=='-'&&dateStr.substr(10,1)=='T') ? true : false;

                if(iso){
                    year = dateStr.substr(0,4);
                    month = parseInt((dateStr.substr(5,1)=='0') ? dateStr.substr(6,1) : dateStr.substr(5,2))-1;
                    day = dateStr.substr(8,2);
                    hour = dateStr.substr(11,2);
                    minute = dateStr.substr(14,2);
                    dateUTC = Date.UTC(year, month, day, hour, minute);
                    date = new Date(dateUTC);
                }else{
                    d = dateStr.split(' ');
                    if(d.length!=6||d[4]!='at')
                        return dateStr;
                    time = d[5].split(':');
                    ampm = time[1].substr(2);
                    minute = time[1].substr(0,2);
                    hour = parseInt(time[0]);
                    if(ampm=='pm')hour+=12;
                    date = new Date(d[1]+' '+d[2]+' '+d[3] +' '+ hour+':'+minute);
                    date.setTime(date.getTime()-(1000*60*60*7));
                }
                day = (date.getDate()<10)?'0'+date.getDate():date.getDate();
                month = date.getMonth()+1;
                month = (month<10)?'0'+month:month;
                hour = date.getHours();
                minute = (date.getMinutes()<10)?'0'+date.getMinutes():date.getMinutes();
                if(o.timeConversion==12){
                    ampm = (hour<12) ? 'am' : 'pm';
                    if(hour==0)hour==12;
                    else if(hour>12)hour=hour-12;
                    if(hour<10)hour='0'+hour;
                    return day+'.'+month+'.'+date.getFullYear()+' at '+hour+':'+minute+' '+ampm;
                }
                return day+'.'+month+'.'+date.getFullYear()+' '+o.translateAt+' '+hour+':'+minute;
            }
            
            /******************************************************************************************************
             * Helper Function
             ******************************************************************************************************/
             
            function exists(data){
                if(!data || data==null || data=='undefined' || typeof(data)=='undefined') return false;
                else return true;
            }
            
            function modText(text){
                return nl2br(autoLink(escapeTags(text)));
            }
            
            function escapeTags(str){
                return str.replace(/</g,'&lt;').replace(/>/g,'&gt;');
            }
            
            function nl2br(str){
                return str.replace(/(\r\n)|(\n\r)|\r|\n/g,"<br>");
            }
            
            function autoLink(str){
                return str.replace(/((http|https|ftp):\/\/[\w?=&.\/-;#~%-]+(?![\w\s?&.\/;#~%"=-]*>))/g, '<a href="$1" target="_blank">$1</a>');
            }

        });
    };

    /******************************************************************************************************
     * Defaults 
     ******************************************************************************************************/
     
    $.fn.fbWall.defaults = {
        avatarAlternative:      'avatar-alternative.jpg',
        avatarExternal:         'avatar-external.jpg',
        id:                     'neosmart.gmbh',
        max:                    5,
        showComments:           true,
        showGuestEntries:       true,
        translateAt:            'at',
        translateLikeThis:      'like this',
        translateLikesThis:     'likes this',
        translateErrorNoData:   'has not shared any information.',
        translatePeople:        'people',
        timeConversion:         24,
        useAvatarAlternative:   false,
        useAvatarExternal:      false,
        accessToken:            ''
    };

})(jQuery);