<?php

namespace Spider\Lib;

use Dever;

class Queue
{
	public function __construct($method)
	{
		if (!Dever::config('base')->queue) {
			Dever::config('base')->queue = array('method' => $method);
		} else {
			Dever::config('base')->queue['method'] = $method;
		}
		
		Dever::import('queue');
	}

	public function push($url, $config, $num = 0)
	{
		if (strpos($url, '{') !== false && strpos($url, '}') !== false) {
			$this->preg($url, $num, $config);
		} else {
			$this->push_db($url, $config);
		}
		return true;
	}

	public function pop()
	{
		return $this->pop_db();
	}

	private function preg($value, $num, $config)
	{
		$pat = '/{(.*?)}/i';
		preg_match_all($pat, $value, $match);
		if (isset($match[1][0]) && $match[1][0]) {
			if ($num <= 0) $num = 1000;
			parse_str($match[1][0], $param);
			$this->page($param, $match[0][0], $value, $num, $config);
		}
	}

	private function page($param, $replace, $value, $num, $config)
	{
		if (isset($param['page'])) {
			for ($i = $param['page']; $i <= $num; $i++) {
				$url = str_replace($replace, $i, $value);
				$this->push($url, $config);
			}
		} else {
			$this->push(str_replace($replace, '', $value), $config);
		}
	}

	private function push_db($value, $config)
	{
		$config['url'] = $value;
		Dever::push($config);
	}

	private function pop_db()
	{
		return Dever::pop();
	}
}