/************************************************************************************************************************************
 *  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);