设计模式-责任链模式

<?php
abstract class Handler{
protected $_handler = null;
protected $_handlerName = null;
public function setSuccessor($handler){
$this->_handler = $handler;
}
protected function _success($request){
echo $request->getName(),'request was passed <br/>';
return true;
}

abstract function handleRequest($request);
}

class ConcreteHandlerLeader extends Handler{
public function __construct($handlerName){
$this->_handlerName = $handlerName;
}

public function handleRequest($request){
echo $this->_handlerName." has know the rest <br/>";

if(($request->getDay()) < 0.5){
$this->_success($request);
}
if($this->_handler instanceof Handler){
$this->_handler->handleRequest($request);
}
}
}

class ConcreteHandlerManager extends Handler{
public function __construct($handlerName){
$this->_handlerName = $handlerName;
}
public function handleRequest($request){
echo $this->_handlerName."  has know the rest <br/>";
if($request->getDay() <= 3 && $request->getDay() > 0.5){

}
if($this->_handler instanceof Handler){
$this->_handler->handleRequest($request);
}
}
}

class ConcreteHandlerBoss extends Handler{
public function __construct($handlerName){
$this->_handlerName = $handlerName;
}
public function handleRequest($request){
echo $this->_handlerName."  has know the rest <br/>";
if(($request->getDay()) > 3){
$this->_success($request);
}
if($this->_handler instanceof Handler){
$this->_handler->handleRequest($request);
}
}
}

class Request{
private $_name;
private $_day;
private $_reason;

function __construct($name= '', $day= 0, $reason = ''){
$this->_name = $name;
$this->_day = $day;
$this->_reason = $reason;
}

public function setName($name){
$this->_name = $name;
}
public function getName(){
return  $this->_name;
}

public function setDay($day){
$this->_day = $day;
}
public function getDay(){
return  $this->_day ;
}

public function setReason($reason ){
$this->_reason = $reason;
}
public function getReason( ){
return  $this->_reason;
}
}

class client{

/**
*流程1：leader-> manager ->generalManager
*
*/
static function main(){

$leader = new ConcreteHandlerLeader('leader');
$manager = new ConcreteHandlerManager('manager');
$generalManager = new ConcreteHandlerBoss('generalManager');

//请求实例
$request = new Request('guisu',4,'休息' );

$leader->setSuccessor($manager);
$manager->setSuccessor($generalManager);
$result =  $leader->handleRequest($request);

}

/**
* 流程2 :
* leader ->generalManager
*/
static function main2(){
//签字列表
$leader = new ConcreteHandlerLeader('leader');
$manager = new ConcreteHandlerManager('manager');
$generalManager = new ConcreteHandlerBoss('generalManager');

//请求实例
$request = new Request('guisu',3,'休息' );
$leader->setSuccessor($generalManager);
$result = $leader->handleRequest($request);
}

/**
* 流程3 :如果leader不在，那么完全可以写这样的代码
* manager ->generalManager
*/
static function main3(){
//签字列表
$leader = new ConcreteHandlerLeader('leader');
$manager = new ConcreteHandlerManager('manager');
$generalManager = new ConcreteHandlerBoss('generalManager');

//请求实例
$request = new Request('guisu',0.1,'休息' );
$leader->setSuccessor($request);
$manager->setSuccessor($generalManager);
$result = $manager->handleRequest($request);
}
}

client::main();

?>