八. .PHP模式設計企業模式(1)

(*暫時未拆分前端控制器和應用控制器,全部整合在Command類實現)

1 註冊表模式//註冊表模式//註冊表模式用於提供一個系統層級對象,在任何地方都方便訪問(可以使用單例模式)class Registry{    private static $instance;    private $request;    private function __construct(){}    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    function getRequest(){        $this->request;    }    function setRequest(Request $request){        $this->request=$request;    }}class Request{}  2 三種範圍下的註冊表namespace woo\controller;class Request{}class Complex{}//建立一個具有範圍的註冊表模式//請求層級註冊表namespace woo\base;use woo;abstract class Registry{    abstract protected function get($key);    abstract protected function set($key,$val); }class RequestRegistry extends Registry{    private $values=array();    private static $instance;    private function __construct(){}    //返回唯一執行個體    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    protected function get($key){        if(isset($this->values[$key])){            return isset($this->values[$key]);        }        return null;    }    protected function set($key, $val){        $this->values[$key]=$val;    }    static function getRequest(){        return self::instance()->get('request');    }    static function setRequest(woo\controller\Request $request){        return self::instance()->set('request', $request);    }}//會話層級的註冊表class SessionRegistry extends Registry{    private static $instance;    private function __construct(){        session_start();    }    //返回唯一執行個體    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    protected function get($key){        if( isset($_SESSION[__CLASS__][$key]) ){            return isset($_SESSION[__CLASS__][$key]);        }        return null;    }    protected function set($key, $val){        $_SESSION[__CLASS__][$key]=$val;    }    static function getComplex(){        return self::instance()->get('complex');    }    static function setRequest(woo\controller\Complex $request){        return self::instance()->set('complex', $request);    }}//應用程式層級的註冊表class ApplicationRegistry extends Registry{    private static $instance;    private $freezedir='Data';    private $values=array();    private $mtimes=array();    private function __construct(){        session_start();    }    //返回唯一執行個體    static function instance(){        if(!isset(self::$instance)){            self::$instance=new self();        }        return self::$instance;    }    //get,set都是單獨儲存一個$key到檔案中    protected function get($key){        $path=$this->freezedir.DIRECTORY_SEPARATOR.$key;        if(file_exists($path)){            clearstatcache();            //擷取檔案修改時間            $mtime=filemtime($path);            if(!isset($this->mtimes[$key])){                $this->mtimes[$key]=0;            }            //如果檔案被修改            if($mtime > $this->mtimes[$key]){                $data=file_get_contents($path);                $this->mtimes[$key]=$mtime;                return ($this->values[$key]=unserialize($data));            }        }        if(isset($this->values[$key])){            return $this->values[$key];        }        return null;    }    protected function set($key, $val){        $this->values[$key]=$val;        $path=$this->freezedir.DIRECTORY_SEPARATOR.$key;        //檔案不存在會自動建立        file_put_contents($path, serialize($val));        $this->mtimes[$key]=time();    }    static function getDSN(){        return self::$instance()->get('DSN');    }    static function setDSN($dsn){        return self::$instance()->set('DSN',$dsn);    }}3 前端控制器Controller----結合註冊表模式與命令模式打造統一入口架構doExecute($request);    }    function disPlay($request){        //擷取cmd,用於決定調取那個頁面        $cmd=$request->getProperty('cmd');        //寫法不是很好....截取command之前的字元        print $cmd;        $viewUrl="./Woo/View/".substr($cmd,0,strlen($cmd)-(7))."View.html";        include_once($viewUrl);    }    abstract function doExecute(\Woo\Controller\Request $request);} getProperty('cmd');        $sep=DIRECTORY_SEPARATOR;        //找不到指定cmd資料時,返回預設cmd執行個體        if(!$cmd){            return clone self::$default_cmd;        }        $cmd=str_replace(array('.',$sep), "", $cmd);        $filePath=".\Woo{$sep}Command{$sep}{$cmd}.php";        $className="\Woo\\Command\\{$cmd}";        if(file_exists($filePath)){            require_once("$filePath");            //判斷傳入的類是否存在,是否是base_cmd的子類            if(class_exists($className)){                $cmd_class=new \ReflectionClass($className);                if($cmd_class->isSubclassOf(self::$base_cmd)){                    return $cmd_class->newInstance();                }else{                    //解析失敗,跳轉到預設頁面                    $request->addFeedback("command '$cmd' is not a command");                    return clone self::$default_cmd;                }            }        }else{            $request->addFeedback("command '$cmd' is not found");            return clone self::$default_cmd;        }    }}addFeedback("Welcome to WOO!");        $feedbacks=$request->getFeedback();        foreach ($feedbacks as $key=>$val){            print $val;            print "
";        }        include_once("Woo/View/main.html");    }}addFeedback("Welcome to WOO!");        $feedbacks=$request->getFeedback();        foreach ($feedbacks as $key=>$val){            print $val;            print "
";        }        $this->disPlay($request);    }}freezedir.DIRECTORY_SEPARATOR.$key;        if(file_exists($path)){            clearstatcache();            //擷取檔案修改時間            $mtime=filemtime($path);            if(!isset($this->mtimes[$key])){                $this->mtimes[$key]=0;            }            //如果檔案被修改            if($mtime > $this->mtimes[$key]){                $data=file_get_contents($path);                $this->mtimes[$key]=$mtime;                return ($this->values[$key]=unserialize($data));            }        }        if(isset($this->values[$key])){            return $this->values[$key];        }        return null;    }    protected function set($key, $val){        $this->values[$key]=$val;        $path=$this->freezedir.DIRECTORY_SEPARATOR.$key;        if(!is_dir($this->freezedir)){            mkdir($this->freezedir);        }        //檔案不存在會自動建立        file_put_contents($path, serialize($val));        $this->mtimes[$key]=time();    }    static function getDSN(){        return self::instance()->get('DSN');    }    static function setDSN($dsn){        return self::instance()->set('DSN',$dsn);    }}values[$key])){            return isset($this->values[$key]);        }        return null;    }    protected function set($key, $val){        $this->values[$key]=$val;    }    static function getRequest(){        return self::instance()->get('request');    }    static function setRequest(\Woo\Controller\Request $request){        return self::instance()->set('request', $request);    }}get('complex');    }    static function setRequest(Woo\Controller\Complex $request){        return self::instance()->set('complex', $request);    }}getOptions();    }    //只有快取資料不存在時才會調用該方法    private function getOptions(){        $this->ensure(file_exists($this->config),                "Could not find options file!");        $options=simplexml_load_file($this->config);        print get_class($options);        $dsn=$options->dsn;        $this->ensure($dsn, "No DSN found!");        //擷取值之後,將其存放進應用程式層級註冊表中,方便緩衝使用        //先轉化成數組,方便序列化        \Woo\Base\ApplicationRegistry::setDSN(array($dsn->__toString()));        //設定其他值        //...    }    private function ensure($expr,$message){        if(!$expr){            throw new \Exception($message);        }    }}init();        //理論上講handleRequest需要在每次請求到來時運行        $instance->handleRequest();    }    function init(){        //擷取一個單例,用於做全域配置        $applicationHelper=ApplicationHelper::instance();        $applicationHelper->init();    }    //每次請求都需要調用一次    function handleRequest(){        $request=new Request();        $cmd_r=new \Woo\Command\CommandResolver();        //根據request產生對應command抽象類別(介面)的子類執行個體        //之後要利用command執行相關動作        $cmd=$cmd_r->getCommand($request);        $cmd->execute($request);    }}init();        \Woo\Base\RequestRegistry::setRequest($this);    }    //同時支援HTTP請求和命令列參數(可用於偵錯工具使用)    //*用於將參數填充進properties屬性裡    function init(){        //表單提交方式        if(isset($_SERVER['REQUEST_METHOD'])){            //用於收集表單提交的資料            $this->properties=$_REQUEST;            return;        }        //$_SERVER['argv'] 傳遞給該指令碼的參數        foreach ($_SERVER['argv'] as $arg){            //搜尋字串第一次出現的位置            if(strpos($arg, '=')){                list($key,$val)=explode("=", $arg);                $this->setProperty($key,$val);            }        }    }    function getProperty($key){        if(isset($this->properties[$key])){            return $this->properties[$key];        }        return null;    }    function setProperty($key,$val){        $this->properties[$key]=$val;    }    function addFeedback($msg){        array_push($this->feedback, $msg);    }    function getFeedback(){        return $this->feedback;    }    function getFeedbackString($separator="\n"){        return implode($separator,$this->feedback);    }}//woo_options.xmldsnDSN //架構入口index.php
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