<?php


/**
 * Description of CommandDemo
 * 命令模式
 * @author jm
 */
class CommandDemo
{
    //put your code here
    public static function main()
    {
        //开店前准备
        $boy = new Barbecuer();
        $bakeMuttonCommand1 = new BakeMuttonCommand($boy);
        $bakeMuttonCommand2 = new BakeMuttonCommand($boy);
        $bakeChickenWingCommand1 = new BakeChickenWingCommand($boy);
        $girl = new Waiter();

        //开门营业
        $girl->setOrder($bakeMuttonCommand1);
        $girl->setOrder($bakeMuttonCommand2);
        $girl->setOrder($bakeChickenWingCommand1);
        $girl->notify();
    }
}

//烤串 接收者执行者receiver
class Barbecuer
{
    public function bakeMutton()
    {
        echo "烤羊肉串\n";
    }

    public function bakeChickenWing()
    {
        echo "烤鸡翅\n";
    }
}

// 抽象命令
abstract  class  Command
{
    protected $receiver;

    function __construct(Barbecuer $receiver)
    {
        $this->receiver = $receiver;
    }

    abstract public function excuteCommand();
}

//烤羊肉
class BakeMuttonCommand extends Command
{
    public $commandName = '烤羊肉';
    public function excuteCommand()
    {
        $this->receiver->bakeMutton();
    }
}

//烤鸡翅
class BakeChickenWingCommand extends Command
{
    public $commandName = '烤鸡翅';
    public function excuteCommand()
    {
        $this->receiver->bakeChickenWing();
    }
}

//服务员 调用者 Invoker
class Waiter
{
    private $commands = [];

    //设置订单
    public function setOrder(Command $command)
    {
        if ($command instanceof BakeChickenWingCommand)
        {
            echo "增加订单：".$command->commandName."\t"."服务员： 鸡翅没有了，请点别的烧烤\n";
        } else {
            echo "增加订单：".$command->commandName."\n";
            array_push($this->commands, $command);
        }
    }

    //取消订单
    public function cancelOrder(Command $command){}

    //通知执行
    public function notify()
    {
        foreach ($this->commands as $value) {
            $value->excuteCommand();
        }
    }
}

CommandDemo::main();