实现功能:
1.用户A向用户B打赏金币
2.减少用户A的金币,并写入金币明细表
3.增加用户B的金币,并写入金币明细表
4.给用户B发送一个打赏通知
ps:本文中的同事,并非是指该类为同事,而是沿用中介者模式中的称呼.与中介者打交道的各个类.
一.虚拟同事类:
/** * Class Colleague */ abstract class Colleague { protected $mediator; public function setMediator(Mediator $mediator) { $this->mediator = $mediator; } }
二.虚拟用户类,继承虚拟同事类
/** * Class User */ abstract class User extends Colleague { protected $uid; protected $money; public function __construct($uid, $money) { $this->uid = $uid; $this->money = $money; } }
三.创建两个同事类:付款方和收款方
1.付款方
class UserPayer extends User { public function changeMoney($money) { $this->money -= $money; // 写入明细 $this->mediator->writeMoneyDetail([ ‘uid‘ => $this->uid, ‘money‘ => $money, ‘rule‘ => ‘-‘ ]); // 付款给对方 $this->mediator->payee($money); } public function getUid() { return $this->uid; } }
2.收款方
class UserPayee extends User { public function changeMoney($money) { $this->money += $money; // 写入明细 $this->mediator->writeMoneyDetail([ ‘uid‘ => $this->uid, ‘money‘ => $money, ‘rule‘ => ‘+‘ ]); $attributes = [ ‘to_uid‘ => $this->uid, ‘from_uid‘ => $this->mediator->getPayerUid(), ‘money‘ => $money ]; // 增加通知 $this->mediator->notify($attributes); } }
四.继续创建同事类:通知类
/** * 通知类 * Class Notify */ class Notify extends Colleague { public function writeNotify(array $attribute) { echo "用户{$attribute[‘from_uid‘]}向用户{$attribute[‘to_uid‘]}打赏{$attribute[‘money‘]}个金币<br>"; } }
五.继续创建同事类:金币明细
/** * 金币明细 * Class MoneyDetial */ class MoneyDetial extends Colleague { public function writeToDb(array $attribute) { echo "UID为{$attribute[‘uid‘]}的用户金币{$attribute[‘rule‘]} {$attribute[‘money‘]}<br>"; } }
六.中介者类:
/** * 中介者类 * Class Mediator */ class Mediator { private $userPayer; private $userPayee; private $notify; private $moneyDetial; public function __construct(UserPayer $userPayer, UserPayee $userPayee, Notify $notify, MoneyDetial $moneyDetial) { $this->userPayer = $userPayer; $this->userPayee = $userPayee; $this->notify = $notify; $this->moneyDetial = $moneyDetial; } /** * 写入明细 * @param array $arributes */ public function writeMoneyDetail(array $arributes) { $this->moneyDetial->writeToDb($arributes); } /** * 收款 * @param $money */ public function payee($money) { $this->userPayee->changeMoney($money); } /** * 写入通知 * @param array $attribute */ public function notify(array $attribute) { $this->notify->writeNotify($attribute); } /** * 获得付款方UID * @return mixed */ public function getPayerUid() { return $this->userPayer->getUid(); } }
七.具体调用
// 创建各个同事类 $userPayer = new UserPayer(1, 100); $userPayee = new UserPayee(2, 200); $notify = new Notify(); $moneyDetial = new MoneyDetial(); // 创建中介者 $mediator = new Mediator($userPayer, $userPayee, $notify, $moneyDetial); // 为每个同时类设置中介者 $userPayer->setMediator($mediator); $userPayee->setMediator($mediator); $notify->setMediator($mediator); $moneyDetial->setMediator($mediator); // 打赏 $userPayer->changeMoney(10);
八.输出结果:
UID为1的用户金币- 10 UID为2的用户金币+ 10 用户1向用户2打赏10个金币
原文地址:https://www.cnblogs.com/itfenqing/p/8728011.html
时间: 2024-10-12 19:08:50