<?php defined('SYSPATH') or die('No direct script access.');

        /*
        * Class representing a head object 
        * Implements singleton through the instance method
        * @author M.Wells
        * @url www.ninjapenguin.co.uk
        */
        class Head
        {
            private static $obj = NULL;
            private static $theHead = "";
            private static $title = "";

            function __construct() {}

            /*
            * Factory function to implement singleton pattern for this object
            */
            public static function instance()
            {
                (self::$obj === null) AND self::$obj = new Head;
                return self::$obj;
            }

            /*
            * Function to write to the head
            * @param String Data to write to the head
            */
            protected static function write($data)
            {
                self::$theHead .= $data;
                return self::$obj;
            }

            /**
            * Function to add the title to the head
            */
            public static function title($title)
            {
                self::$title = "<title>".$title."</title>";
                return self::$obj;
            }

            /*
            * Shorthand to write javascript
            */
            public static function js($data)
            {
                self::write('<script type="text/javascript">'.$data.'</script>');
                return self::$obj;
            }

            /*
            * shorthand to write a style
            */
            public static function style($data)
            {
                self::write('<style type="text/css">'.$data.'</style>');
                return self::$obj;
            }

            /*
            * Shorthand to include an external javascript file
            */
            public static function incJs($src)
            {
                self::write('<script type="text/javascript" src="'.url::base().$src.'"></script>');
                return self::$obj;
            }

            /*
            * Shorthand to include a CSS file
            */
            public static function incCss($src)
            {
                self::write('<link rel="stylesheet" type="text/css" href="'.url::base().$src.'" />');
                return self::$obj;
            }

            /*
            * Function to return the head content
            */
            public static function get()
            {
                return self::$theHead;
            }

            /*
            * Returns the head string if the object is output 
            */
            public function __toString()
            {
                //Format the head here!
                return self::$title."\n\t".Head::get();
            }
        }