大话设计模式-状态模式

最新推荐文章于 2024-04-03 08:53:12 发布

三石先生XL

最新推荐文章于 2024-04-03 08:53:12 发布

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分类专栏：设计模式-PHP实现文章标签：设计模式 function class 工作 null

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本文通过一个程序员一天的状态变化，从上午精力充沛到晚上疲惫不堪甚至睡着的过程，展示了程序员的工作日常。采用状态模式实现，根据时间变化调整工作状态。

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abstract class State {
	public abstract function writeProgram($w);
}

//上午工作状态
class ForenoonState extends State {

	public function writeProgram($w) {
		if($w->hour < 12) {
			echo '当前时间：'.$w->hour.'点 上午工作，精神百倍。<br/>';
		} else {
			$w->setState(new NoonState());
			$w->writeProgram();
		}
	}

}

//中午工作状态
class NoonState extends State {
	public function writeProgram($w) {
		if($w->hour < 13) {
			echo '当前时间：'.$w->hour.'点 饿了，午饭；犯困，午休。<br/>';
		} else {
			$w->setState(new AfternoonState());
			$w->writeProgram();
		}
	}
}

//下午工作状态
class AfternoonState extends State {
	public function writeProgram($w) {
		if($w->hour < 17) {
			echo '当前时间：'.$w->hour.'点 下午工作状态还不错，继续努力。<br/>';
		} else {
			$w->setState(new EveningState());
			$w->writeProgram();
		}
	}
}

//晚间工作状态
class EveningState extends State {
	public function writeProgram($w) {
		if($w->taskFinished) {
			$w->setState(new RestState());
			$w->writeProgram();
		} else {
			if($w->hour < 21) {
				echo '当前时间：'.$w->hour.'点 加班哦，疲劳至极。<br/>';
			} else {
				$w->setState(new SleepingState());
				$w->writeProgram();
			}
		}
	}
}

//睡眠状态
class SleepingState extends State {
	public function writeProgram($w) {
		echo '当前时间：'.$w->hour.'点 不行了，睡着了。<br/>';
	}
}

//下班休息状态
class RestState extends State {
	public function writeProgram($w) {
		echo '当前时间：'.$w->hour.'点下班回家了。<br/>';
	}
}

//工作
class Work {
	private $current;
	public function __set($key, $value) {
		$this->$key = $value;
	}

	public function __get($key) {
		if(isset($this->$key)) {
			return $this->$key;
		} else {
			return NULL;
		}
	}
	public function __construct() {
		$this->current = new ForenoonState();
	}
	private $hour;
	private $TaskFinished = false;
	public function setState($s) {
		$this->current = $s;
	}

	public function writeProgram() {
		$this->current->writeProgram($this);
	}
}

$emergencyProjects = new Work();
$emergencyProjects->hour = 9;
$emergencyProjects->writeProgram();
$emergencyProjects->hour = 10;
$emergencyProjects->writeProgram();
$emergencyProjects->hour = 12;
$emergencyProjects->writeProgram();
$emergencyProjects->hour = 13;
$emergencyProjects->writeProgram();
$emergencyProjects->hour = 14;
$emergencyProjects->writeProgram();
$emergencyProjects->hour = 17;
$emergencyProjects->writeProgram();

$emergencyProjects->taskFinished = false;

$emergencyProjects->hour = 19;
$emergencyProjects->writeProgram();
$emergencyProjects->hour = 22;
$emergencyProjects->writeProgram();