<?php

/*
 * 设计模式练习
 * 1.数据库连接类（单例模式）
 * 2.调用接口实现留言本功能（工厂模式）
 * 3.实现分级举报处理功能（责任链模式）
 * 4.发送不同组合的举报信息（桥接模式）
 * 5.发送不同格式的举报信息（适配器模式）
 * 6.在投诉内容后自动追加时间（装饰器模式）
 * 7.根据会员登录信息变换显示风格（观察者模式）
 * 8.根据发帖长度加经验值（策略模式）
 */

interface DB {

  function conn();
}

/**
 * 单例模式
 */
class MysqlSingle implements DB {

  protected static $_instance = NULL;

  public static function getInstance() {
    if (!self::$_instance instanceof self) {
      self::$_instance = new self;
    }
    return self::$_instance;
  }

  final protected function __construct() {
    echo \'Mysql单例创建成功<br>\';
  }

  final protected function __clone() {
    return false;
  }

  public function conn() {
    echo \'Mysql连接成功<br>\';
  }

}

/**
 * 工厂模式
 */
interface Factory {

  function createDB();
}

class MysqlFactory implements Factory {

  public function createDB() {
    echo \'Mysql工厂创建成功<br>\';
    return MysqlSingle::getInstance();
  }

}

/**
 * 根据用户名显示不同风格
 * 观察者模式
 */
class Observer implements SplSubject {

  protected $_observers = NULL;
  public $_style = NULL;

  public function __construct($style) {
    $this->_style = $style;
    $this->_observers = new SplObjectStorage();
  }

  public function show() {
    $this->notify();
  }

  public function attach(SplObserver $observer) {
    $this->_observers->attach($observer);
  }

  public function detach(SplObserver $observer) {
    $this->_observers->detach($observer);
  }

  public function notify() {
    $this->_observers->rewind();
    while ($this->_observers->valid()) {
      $observer = $this->_observers->current();
      $observer->update($this);
      $this->_observers->next();
    }
  }

}

class StyleA implements SplObserver {

  public function update(SplSubject $subject) {
    echo $subject->_style . \' 模块A<br>\';
  }

}

class StyleB implements SplObserver {

  public function update(SplSubject $subject) {
    echo $subject->_style . \' 模块B<br>\';
  }

}

/**
 * 根据不同方式进行投诉
 * 桥接模式
 */
class Bridge {

  protected $_obj = NULL;

  public function __construct($obj) {
    $this->_obj = $obj;
  }

  public function msg($type) {
    
  }

  public function show() {
    $this->msg();
    $this->_obj->msg();
  }

}

class BridgeEmail extends Bridge {

  public function msg() {
    echo \'Email>>\';
  }

}

class BridgeSms extends Bridge {

  public function msg() {
    echo \'Sms>>\';
  }

}

class Normal {

  public function msg() {
    echo \'Normal<br>\';
  }

}

class Danger {

  public function msg() {
    echo \'Danger<br>\';
  }

}

/**
 * 适配器模式
 */
class Serialize {

  public $content = NULL;

  public function __construct($content) {
    $this->content = serialize($content);
  }

  public function show() {
    return \'序列化格式：<br>\' . $this->content;
  }

}

class JsonAdapter extends Serialize {

  public function __construct($content) {
    parent::__construct($content);
    $tmp = unserialize($this->content);
    $this->content = json_encode($tmp, TRUE);
  }

  public function show() {
    return \'Json格式：<br>\' . $this->content;
  }

}

/**
 * 在投诉内容后自动追加
 * 装饰器模式
 */
class Base {

  protected $_content = NULL;

  public function __construct($content) {
    $this->_content = $content;
  }

  public function getContent() {
    return $this->_content;
  }

}

class Decorator {

  private $_base = NULL;

  public function __construct(Base $base) {
    $this->_base = $base;
  }

  public function show() {
    return $this->_base->getContent() . \'>>系统时间：\' . date(\'Y-m-d H:i:s\', time());
  }

}

/**
 * 分级举报处理功能
 * 责任链模式
 */
class level1 {

  protected $_level = 1;
  protected $_top = \'Level2\';

  public function deal($level) {
    if ($level <= $this->_level) {
      echo \'处理级别：1<br>\';
      return;
    }
    $top = new $this->_top;
    $top->deal($level);
  }

}

class level2 {

  protected $_level = 2;
  protected $_top = \'Level3\';

  public function deal($level) {
    if ($level <= $this->_level) {
      echo \'处理级别：2<br>\';
      return;
    }
    $top = new $this->_top;
    $top->deal($level);
  }

}

class level3 {

  protected $_level = 3;
  protected $_top = \'Level2\';

  public function deal($level) {
    echo \'处理级别：3<br>\';
    return;
  }

}

if (!empty($_POST)) {
  echo \'<h1>PHP设计模式</h1>\';
  //连接数据库——工厂+单例模式
  $mysqlFactory = new MysqlFactory();
  $single = $mysqlFactory->createDB();
  $single->conn();
  echo \'<br>\';
  //观察者模式
  $username = $_POST[\'username\'];
  $ob = new Observer($username);
  $a = new StyleA();
  $ob->attach($a);
  $b = new StyleB();
  $ob->attach($b);
  $ob->show();
  echo \'<br>\';
  $ob->detach($b);
  $ob->show();
  echo \'<br>\';
  //桥接模式
  $typeM = $_POST[\'typeM\'];
  $typeN = \'Bridge\' . $_POST[\'typeN\'];
  $obj = new $typeN(new $typeM);
  $obj->show();
  echo \'<br>\';
  //适配器模式
  $post = $_POST;
  $obj = new Serialize($post);
  echo $obj->show();
  echo \'<br>\';
  $json = new JsonAdapter($post);
  echo $json->show();
  echo \'<br>\';
  echo \'<br>\';
  //装饰器模式
  $content = $_POST[\'content\'];
  $decorator = new Decorator(new Base($content));
  echo $decorator->show();
  echo \'<br>\';
  //责任链模式
  echo \'<br>\';
  $level = $_POST[\'level\'];
  $deal = new Level1();
  $deal->deal(intval($level));
  return;
}
require(\"0.html\");

<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
  <head>
    <title>PHP设计模式</title>
    <meta charset=\"UTF-8\">
    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">
    <style>
      div{border:solid gray 1px;margin-top:10px;height: 100px;width: 200px;}
    </style>
  </head>
  <body>
    <form action=\"0.php\" method=\"post\">
      <h1>用户名</h1>
      <select id=\"username\" name=\"username\">
        <option value=\"Tom\">Tom</option>
        <option value=\"Lily\">Lily</option>
      </select>
      <h1>投诉方式</h1>
      <select id=\"type\" name=\"typeM\">
        <option value=\"Normal\">Normal</option>
        <option value=\"Danger\">Danger</option>
      </select>
      <select id=\"type\" name=\"typeN\">
        <option value=\"Email\">Email</option>
        <option value=\"Sms\">Sms</option>
      </select>
      <h1>处理级别</h1>
      <select id=\"level\" name=\"level\">
        <option value=\"1\">1</option>
        <option value=\"2\">2</option>
        <option value=\"3\">3</option>
      </select>
      <h1>投诉内容</h1>
      <textarea id=\"content\" name=\"content\" rows=\"3\"></textarea>
      <button type=\"submit\">提交</button>
    </form>
  </body>
</html>