<?php
namespace Spider\Lib\Doc;
include(DEVER_APP_PATH . 'third/phpQuery.php');
use Dever;
use phpQuery;

class Dom
{
	public static function init($html)
	{
		if (strstr($html, 'gb2312')) {
			$html = str_replace('gb2312', 'utf-8', $html);
		}
		return phpQuery::newDocumentHTML($html);
	}

	public static function find($dom, $rule)
	{
		list($rule, $attr) = self::each($rule);
		$rule = str_replace(array('$', ').', '$dom->find.'), array('$dom->find', ')->', '$dom->'), $rule);
		$cmd = '$dom = ' . $rule . ';';
		eval($cmd);
		return self::findAttr($dom, $attr);
	}

	public static function each($rule)
	{
		$attr = '';
		if (strpos($rule, '.each().') !== false) {
			$temp = explode('.each()', $rule);
			$rule = $temp[0];
			$attr = '$' . $temp[1];
		}
		return array($rule, $attr);
	}

	public static function findAttr($dom, $attr)
	{
		if (!$attr) {
			return $dom;
		}
		$data = array();
		foreach ($dom as $k => $v) {
			$data[] = self::find(pq($v), $attr);
		}
		return json_encode($data, JSON_UNESCAPED_UNICODE);
	}

	public static function get($data)
	{
		return pq($data);
	}

	public static function rule($doc, $dom, $col, $rule, $key)
	{
		$result = Core::rule($doc, $dom, $col, $rule, $key);
		return $result;
	}
}