<?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>