<?php

namespace Spider\Lib;

use Dever;

class Queue
{
	private $data = array();

	public function push($value, $key = 0, $num = 0)
	{
		if (strpos($value, '{') !== false && strpos($value, '}') !== false) {
			$this->preg($value, $num);
		} else {
			array_push($this->data, $value);
		}
		return true;
	}

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

	private function preg($value, $num)
	{
		$pat = '/{(.*?)}/i';
		preg_match_all($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);
		}
	}

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