<?php
/**
 * the last known user to change this file in the repository  <$LastChangedBy$>
 * @author $Author$ Foxsee@aliyun.com
 * @copyright  2003-2103 phpwind.com
 * @license http://www.phpwind.com
 * @version $Id$ 
 * @package 
 */
class PwCronService {
	
	/**
	 * 判断一个系统任务是否存在，不存在就加一个,存在就启动并更新运行时间
	 */
	public function getSysCron($cronFile, $time = 0) {
		Wind::import('SRV:cron.dm.PwCronDm');
		$ds = $this->_getCronDs();
		$cron = $ds->getCronByFile($cronFile);
		if ($cron['cron_id']) {
			if (!$time){
				list($day, $hour, $minute) = explode('-', $cron['loop_daytime']);
				$time = $this->getNextTime($cron['loop_type'], $day, $hour, $minute);
			}
			$dm = new PwCronDm($cron['cron_id']);
	 		$dm->setNexttime($time);
			$ds->updateCron($dm);
		} else {
			$dm = new PwCronDm();
 			$dm->setSubject($cronFile)
 				->setLooptype('day')
 				->setLoopdaytime('0','3','0')
	 			->setCronfile($cronFile)
				->setNexttime($time)
				->setIsopen(2);
			$ds->addCron($dm);
		}
		return true;
	}
	
	/**
	 * 更新系统计划任务
	 * 
	 * Enter description here ...
	 */
	public function updateSysCron() {
		$ds = $this->_getCronDs();
		Wind::import('SRV:cron.dm.PwCronDm');
		$path = Wind::getRealPath('SRV:cron.srv.system.systemCron');
		if (!is_file($path)) return false;
		$cron = @include $path;
		$sysCron = $ds->getList(2);
		$_sysCron = array();
		foreach ($sysCron AS $k=>$v) {
			$_sysCron[$v['cron_file']] = $v;
		}
		foreach ($cron AS $k=>$v) {
			if (!in_array($v['type'],array('month','week','day','hour','now'))) continue;
			if (!$v['file']) continue;
			$cronInfo = $ds->getCronByFile($v['file']);
			//if ($cronInfo) $ds->deleteCron($cronInfo['cron_id']);
			$day = $v['time']['day'];
			$hour = $v['time']['hour'];
			$minute = $v['time']['minute'];
			if ($cronInfo) {
				$dm = new PwCronDm($cronInfo['cron_id']);
			} else {
				$dm = new PwCronDm();
			}
	 		$dm->setSubject($v['name'])
				->setLooptype($v['type'])
				->setCronfile($v['file'])
				->setIsopen(PwCron::SYSTEM)
				->setCreatedtime(Pw::getTime());
			switch ($v['type']) {
				case 'month':
					$nexttime = $this->getNextTime('month', $day, $hour);
					$dm->setLoopdaytime($day, $hour)->setNexttime($nexttime);
					break;
				case 'week':
					$nexttime = $this->getNextTime('week', $day, $hour);
					$dm->setLoopdaytime($day, $hour)->setNexttime($nexttime);
					break;
				case 'day':
					$nexttime = $this->getNextTime('day', 0, $hour);
					$dm->setLoopdaytime(0,$hour)->setNexttime($nexttime);
					break;
				case 'hour':
					$nexttime = $this->getNextTime('hour', 0, 0,$minute);
					$dm->setLoopdaytime(0, 0, $minute)->setNexttime($nexttime);
					break;
				case 'now':
					$nexttime = $this->getNextTime('now',  $day, $hour, $minute);
					$dm->setLoopdaytime($day, $hour, $minute)->setNexttime($nexttime);
					break;
				default:
					return false;
			}
			if ($cronInfo) {
				$resource = $ds->updateCron($dm);
			} else {
				$resource = $ds->addCron($dm);
			}
			unset($_sysCron[$v['file']]);
		}
		foreach ($_sysCron AS $v) {
			$ds->deleteCron($v['cron_id']);
		}
		return true;
	}
	
	/**
	 * 获得下次执行时间
	 * 
	 * @param string $loopType
	 * @param int $day
	 * @param int $hour
	 * @param int $minute
	 */
	public function getNextTime($loopType, $day = 0, $hour = 0, $minute = 0) {
		$time = Pw::getTime();
		if ($timezone = Wekit::C('site', 'time.timezone')) $time += $timezone * 3600;
		$_minute = intval(gmdate('i', $time));
		$_hour 	= gmdate('G', $time);
		$_day 	= gmdate('j', $time);
		$_week 	= gmdate('w', $time);
		$_mouth = gmdate('n', $time);
		$_year = gmdate('Y', $time);
		$nexttime =  mktime($_hour, 0, 0, $_mouth, $_day, $_year);
		switch ($loopType) {
			case 'month':
				$isLeapYear = date('L', $time);
				$mouthDays = $this->_getMouthDays($_mouth, $isLeapYear);
				if ($day == 99) $day = $mouthDays;
				$nexttime += ($hour < $_hour ? -($_hour - $hour) : $hour - $_hour) * 3600;
				if ($hour <= $_hour && $day == $_day) {
					$nexttime +=  ($mouthDays - $_day + $day) * 86400;
				} else {
					$nexttime +=  ($day < $_day ? $mouthDays - $_day + $day : $day - $_day) * 86400;
				}
				break;
			case 'week':
				$nexttime += ($hour < $_hour ? -($_hour - $hour) : $hour - $_hour) * 3600;
				if ($hour <= $_hour && $day == $_week) {
					$nexttime +=  (7 - $_week + $day) * 86400;
				} else {
					$nexttime +=  ($day < $_week ? 7 - $_week + $day : $day - $_week) * 86400;
				}
				break;
			case 'day':
				$nexttime += ($hour < $_hour ? -($_hour - $hour) : $hour - $_hour) * 3600;
				if ($hour <= $_hour) {
					$nexttime +=  86400;
				}
				break;
			case 'hour':
				$nexttime += $minute < $_minute ? 3600 + $minute * 60 :  $minute * 60;
				break;
			case 'now':
				$nexttime =  mktime($_hour, $_minute, 0, $_mouth, $_day, $_year);
				$_time = $day * 24 * 60;
				$_time += $hour * 60;
				$_time += $minute;
				$_time = $_time * 60;
				$nexttime += $_time;
				break;
		}
		if ($timezone) $nexttime -= $timezone * 3600;
		return $nexttime;
	}
	
	/**
	 * 递归执行计划任务
	 * Enter description here ...
	 */
	public function runCron() {
		$_time = Pw::getTime();
		$cron = $this->_getCronDs()->getFirstCron();
		if (!$cron || $cron['next_time'] > $_time) return false;
		list($day, $hour, $minute) = explode('-', $cron['loop_daytime']);
		$nexttime = $this->getNextTime($cron['loop_type'], $day, $hour, $minute);
		Wind::import('SRV:cron.dm.PwCronDm');
		$dm = new PwCronDm($cron['cron_id']);
 		$dm->setSubject($cron['subject'])
 			->setCronfile($cron['cron_file'])
 			->setModifiedtime($_time)
			->setNexttime($nexttime);
		$this->_getCronDs()->updateCron($dm);
		
		if (!$this->_runAction($cron['cron_file'], $cron['cron_id'] )) {
			return false;
		}
		$this->runCron();
		return true;
	}
	
	private function _runAction($filename = '', $cronId = 0) {
		if (!$filename || Pw::substrs($filename,8,0,false) != 'PwCronDo') return false;
		$fliePath = 'SRV:cron.srv.do.'.$filename;
		Wind::import($fliePath);
		$cron = new $filename();
		$cron->run($cronId);
		return true;
	}
	
	
	private function _getMouthDays($month, $isLeapYear) {
		if (in_array($month,array('1','3','5','7','8','10','12'))) {
			$days = 31;
		} elseif ($month!=2) {
			$days = 30;
		} else {
			if ($isLeapYear) {
				$days = 29;
			} else {
				$days = 28;
			}
		}
		return $days;
	}
	
	private function _getCronDs() {
		return Wekit::load('cron.PwCron');
	}

}
?>