68 lines
1.2 KiB
PHP
68 lines
1.2 KiB
PHP
<?php
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namespace app\farm\server;
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use app\shop\model\BargainRecord;
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use think\App;
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use work;
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class Land
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{
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public $_observer = [];
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public function __construct() {
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}
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/**
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* @purpose: 添加观察者
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* @param string $key 给所添加的观察者的一个唯一 key，方便从注册树中移除观察者
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* @param Observer $observer 观察者对象
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* @return mixed
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*/
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public function addObserver( $observer)
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{
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$this->_observer[] = $observer;
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}
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/**
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* @purpose: 从注册树中移除观察者
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* @param string $key 给所添加的观察者的一个唯一 key，方便从注册树中移除观察者
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* @return mixed
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*/
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public function removeObserver($key)
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{
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unset($this->_observer[$key]);
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}
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/**
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* @purpose: 广播通知以注册的观察者，对注册树进行遍历，让每个对象实现其接口提供的操作
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* @return mixed
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*/
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public function notify($id,$data)
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{
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if(!empty($this->_observer)){
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foreach ($this->_observer as $observer) {
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$data[] = $observer->eventLand($id,$data);
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}
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}
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return !empty($data)?$data:[];
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}
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}
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