<?php
/**
 * Help to construct a XML file.
 *
 * @author Camilo Carromeu <camilo@carromeu.com>
 * @category class
 * @package core
 * @subpackage util
 * @copyright 2005-2017 Titan Framework
 * @license http://www.titanframework.com/license/ BSD License (3 Clause)
 * @see Xml
 */
class XmlMaker
{
	private $xml;

	private $indent;

	private $stack = array();

	private $breakLine = TRUE;

	public function __construct ($indent = "  ", $breakLine = TRUE)
	{
		$this->indent = $indent;

		$this->breakLine = $breakLine;

		$this->xml = '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
	}

	private function indent ()
	{
		for ($i = 0, $j = count($this->stack); $i < $j; $i++)
			$this->xml .= $this->indent;
	}

	public function push ($element, $attributes = array())
	{
		$this->xml .= '<'. $element;

		foreach ($attributes as $key => $value)
			if (!is_numeric ($key))
				$this->xml .= ($this->breakLine ? "\n" . $this->indent() : '') .' '. $key .'="'. $value .'"';

		$this->xml .= ">\n";

		$this->stack[] = $element;
	}

	public function element ($element, $content, $attributes = array())
	{
		$this->xml .= '<'. $element;

		foreach ($attributes as $key => $value)
			if (!is_numeric ($key))
				$this->xml .= ($this->breakLine ? "\n" . $this->indent() : '') .' '. $key .'="'. $value .'"';

		$this->xml .= '>'. htmlentities ($content, ENT_QUOTES, 'UTF-8') .'</'. $element .'>' . "\n";
	}

	public function emptyElement ($element, $attributes = array())
	{
		$this->xml .= ($this->breakLine ? "\n" : '') . $this->indent() .'<'. $element;

		foreach ($attributes as $key => $value)
			if (!is_numeric ($key))
				$this->xml .= ($this->breakLine ? "\n" . $this->indent() : '') .' '. $key .'="'. $value .'"';

		$this->xml .= " />\n";
	}

	public function collapseElement ($element, $attributes = array())
	{
		$this->xml .= $this->indent()."<".$element;

		foreach ($attributes as $key => $value)
			if (!is_numeric ($key))
				$this->xml .= ($this->breakLine ? "\n" . $this->indent() : '') .' '. $key .'="'. $value .'"';

		$this->xml .= " />\n";
	}

	public function pop ()
	{
		$element = array_pop ($this->stack);

		$this->xml .= "</". $element .">\n";
	}

	public function getXml ()
	{
		return $this->xml;
	}
}