Bookmarking Functionality

/**
    HELEN Bookmarking

    Handles the adding and removing of bookmarks from site content for healthequitynetwork.org

**/
function Helen_Bookmarking(){
    //for referencing myself
    helen_bookmarking = this;
    this.bookmarks = [];

    /**
     *  Get the user's current bookmarks, update star icon for that content on this page
     **/
    $.getJSON( "/?ACT=85&function=get_bookmarks", function( data ) {
        if(typeof data != 'undefined' && data != null && data.length > 0){
            $.each( data, function( key, val ) {
                helen_bookmarking.bookmarks.push(parseInt(val));
                //update any bookmark icons
                $.each($('.bookmark-button[data-file-id='+val+']'), function(){
                    $(this).attr('data-original-title','Remove Bookmark');
                    var star = $(this).children('span');
                    star.removeClass('glyphicon-star-empty').addClass('glyphicon-star bookmarked');
                });
            });
        }
    });

    $('.bookmark-button').on('click',function(event){
        event.preventDefault();
        var star = $(this).children('span');
        var file_id = $(this).data('file-id');

        var y = event.screenY - 100;
        if(star.hasClass('glyphicon-star-empty')){
            $(this).attr('data-original-title','Remove Bookmark');
            star.removeClass('glyphicon-star-empty').addClass('glyphicon-star bookmarked');
            helen_bookmarking.add_bookmark(file_id);
            flash_notification('Bookmark Added!', '#090', y);
        }
        else{
            $(this).attr('data-original-title','Bookmark');
            star.removeClass('glyphicon-star').removeClass('bookmarked').addClass('glyphicon-star-empty');
            helen_bookmarking.remove_bookmark(file_id);
            flash_notification('Bookmark Removed!', '#900', y);

            if ($(this).parents('#my-bookmarks-table').length) {
                $(this).closest('tr').fadeOut().remove();
                $('#total-bookmarks').html((parseInt($('#total-bookmarks').html())-1) +'');
            }
        }
    });
};

Helen_Bookmarking.prototype.add_bookmark = function(file_id) {
    $.post( "/?ACT=85&function=add_bookmark&library_content_id="+file_id);
    helen_bookmarking.bookmarks.push(parseInt(file_id));
}

Helen_Bookmarking.prototype.remove_bookmark = function(file_id) {
    $.post( "/?ACT=85&function=remove_bookmark&library_content_id="+file_id);
    helen_bookmarking.bookmarks.splice( $.inArray(parseInt(file_id), helen_bookmarking.bookmarks), 1 );
}