<?php

namespace WMDE\HamcrestHtml;

use DOMElement;
use Hamcrest\Description;
use Hamcrest\Matcher;
use Hamcrest\Util;

class ClassMatcher extends TagMatcher {

	/**
	 * @var Matcher
	 */
	private $classMatcher;

	/**
	 * @param Matcher|string $class
	 *
	 * @return self
	 */
	public static function withClass( $class ) {
		return new static( Util::wrapValueWithIsEqual( $class ) );
	}

	public function __construct( Matcher $class ) {
		parent::__construct();
		$this->classMatcher = $class;
	}

	public function describeTo( Description $description ) {
		$description->appendText( 'with class ' )->appendDescriptionOf( $this->classMatcher );
	}

	/**
	 * @param DOMElement $item
	 * @param Description $mismatchDescription
	 *
	 * @return bool
	 */
	protected function matchesSafelyWithDiagnosticDescription(
		$item, Description $mismatchDescription
	) {
		$classAttribute = $item->getAttribute( 'class' );

		$classes = preg_split( '/\s+/u', $classAttribute );
		foreach ( $classes as $class ) {
			if ( $this->classMatcher->matches( $class ) ) {
				return true;
			}
		}

		return false;
	}

}