<?php

namespace alveolata\xml;

require_once(DIR_ALVEOLATA . '/xml/abstract/interface.php');
require_once(DIR_ALVEOLATA . '/xml/concrete/comment/type.php');


/**
 * @author Christian Fraß <frass@greenscale.de>
 */
class implementation_comment implements interface_node
{
	
	/**
	 * @var \alveolata\xml\struct_comment
	 */
	private $subject;
	
		
	/**
	 */
	public function __construct(
		struct_comment $subject
	)
	{
		$this->subject = $subject;
	}
	
	
	/**
	 * @implementation
	 */
	public function find(
		\Closure $sub,
		\Closure $predicate,
		?int $max_depth
	) : array
	{
		return (
			((! \is_null($max_depth)) && ($max_depth <= 0))
			? []
			: (
				($predicate)($this->subject)
				? [$this->subject]
				: []
			)
		);
	}
	
	
	/**
	 * @implementation
	 */
	public function transform(
		\Closure $sub,
		\Closure $function
	)
	{
		return ($function)($this->subject);
	}
	
	
	/**
	 * @implementation
	 */
	public function to_raw(
		\Closure $sub
	)
	{
		return [
			'kind' => 'comment',
			'data' => [
				'content' => $this->subject->content,
			],
		];
	}
	
	
	/**
	 * @implementation
	 */
	public function to_string(
		\Closure $sub,
		int $depth
	) : string
	{
		return ('<!-- ' . $this->subject->content . ' -->');
	}

}

 ?>