<!doctype html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>留言本</title>

    <link rel="stylesheet" href="css.css" type="text/css" />

    <script src="ajax.js"></script>

    <script>

    window.onload = function ()

    {

        //初始化

        var ouser = document.getElementById('user');

        var ouserinfo = document.getElementById('userinfo');

        var oreg = document.getElementById('reg');

        var ologin = document.getElementById('login');

        updata();

        function updata()

        {

            var uid = getCookie('uid');

            var username = getCookie('username');

            if(uid)

            {

                //登陆状态

                ouser.style.display = 'block';

                ouserinfo.innerHTML = username;

                oreg.style.display = 'none';

                ologin.style.display = 'none';

            }

            else

            {

                ouser.style.display = 'none';

                ouserinfo.innerHTML = '';

                oreg.style.display = 'block';

                ologin.style.display = 'block';

            }

        };

        showlist();//列出其中几条

        //验证用户名开始

        var ousername1 = document.getElementById('username1');

        var overifyUserNameMsg = document.getElementById('verifyUserNameMsg');

        ousername1.onblur = function ()

        {

            ajax('get','guestbook/index.php','m=index&a=verifyUserName&username='+this.value,function (data)

            {

                var d = JSON.parse(data);

                overifyUserNameMsg.innerHTML = d.message;

                if(d.code)

                {

                    overifyUserNameMsg.style.color = 'red';

                }

                else

                {

                    overifyUserNameMsg.style.color = 'green';

                }

            });

        }

        //验证用户名结束

        //用户注册开始

        var opassword1 = document.getElementById('password1');

        var obtnReg = document.getElementById('btnReg');

        obtnReg.onclick = function ()

        {

            ajax('post','guestbook/index.php','m=index&a=reg&username='+encodeURI(ousername1.value)+'&password=' + opassword1.value,function (data)

            {

                var d = JSON.parse(data);

                alert(d.message);

            });

        }

        //用户注册结束

        //用户登录开始

        var ousername2 = document.getElementById('username2');

        var opassword2 = document.getElementById('password2');

        var obtnLogin = document.getElementById('btnLogin');

        obtnLogin.onclick = function ()

        {

            ajax('post','guestbook/index.php','m=index&a=login&username='+encodeURI(ousername2.value)+'&password=' + opassword2.value,function (data)

            {

                    var d = JSON.parse(data);

                    alert(d.message);

                    if(!d.code)

                    {

                        updata();

                    }

                });

        }

        //用户登录结束

        //用户退出开始

        var ologout = document.getElementById('logout')

        ologout.onclick = function ()

        {

            ajax('get','guestbook/index.php','m=index&a=logout',function (data)

            {

                var d = JSON.parse(data);

                alert(d.message);

                if(!d.code)

                {

                    updata();

                }

            });

            return false;

        }

        //用户退出结束

        //用户留言开始

        var ocontent = document.getElementById('content');

        var obtnPost = document.getElementById('btnPost');

        obtnPost.onclick = function ()

        {

            ajax('post','guestbook/index.php','m=index&a=send&content='+encodeURI(ocontent.value),function (data)

            {

                var d = JSON.parse(data);

                alert(d.message);

                if(!d.code)

                {

                    createList(d.data,true);

                }

            })

        }

        //用户留言结束

        var olist = document.getElementById('list');

        function createList(data,insert)

        {

            var odl = document.createElement('dl');

            var odt = document.createElement('dt');

            var ostrong = document.createElement('strong');

            ostrong.innerHTML = data.username;

            odt.appendChild(ostrong);

            var odd1 = document.createElement('dd');

            odd1.innerHTML = data.content;

            var odd2 = document.createElement('dd');

            odd2.className = 't';

            var oa1 = document.createElement('a');

            oa1.href ='';

            oa1.innerHTML = '顶(<span>'+data.support+'</span>)';

            var oa2 = document.createElement('a');

            oa2.href = '';

            oa2.innerHTML = '踩(<span>'+data.oppose+'</span>)';

            odd2.appendChild(oa1);

            odd2.appendChild(oa2);

            odl.appendChild(odt);

            odl.appendChild(odd1);

            odl.appendChild(odd2);

            if(insert && olist.children[0])

            {

                olist.insertBefore(odl,olist.children[0]);

            }

            else

            {

                olist.appendChild(odl);

            }

        }

        //点击查看更多内容

        var oshowMore = document.getElementById('showMore');

        var ipage = 1;

        oshowMore.onclick = function ()

        {

            ipage++;

            showlist();

        }

        function showlist()

        {

            ajax('get','guestbook/index.php','m=index&a=getList&n=2&pages=' + ipage,function (data)

            {

                var d = JSON.parse(data);

                var data = d.data;

                if(data)

                {

                    for(var i = 0; i < data.list.length; i++ )

                    {

                        createList(data.list[i]);

                    }

                }

                else

                {

                    if(ipage == 1)

                    {

                        olist.innerHTML = '现在还没有留言，快来请沙发...';

                    }

                    oshowMore.style.display = 'none';

                }

            })

        }

        //获取cookie

        function getCookie(key)

        {

            var arr1 = document.cookie.split('; ');

            for (var i=0; i<arr1.length; i++)

            {

                var arr2 = arr1[i].split('=');

                if (arr2[0]==key)

                {

                return arr2[1];

                }

            }

        }

    }

    </script>

</head>

<body>

    <div id="header"></div>

    <div id="container">

        <div id="list">

        <!--<dl>

                <dt>

                    <strong>zmouse</strong> 说 :

                </dt>

                <dd>内容</dd>

                <dd class="t">

                    <a href="javascript:;" id="support">顶(<span>0</span>)</a>

                     |

                    <a href="javascript:;" id="oppose">踩(<span>0</span>)</a>

                </dd>

            </dl>-->

        </div>

        <div id="showMore">显示更多...</div>

        <div id="sidebar">

            <div id="user" style="margin-bottom: 10px;">

                <h4><span id="userinfo"></span> <a href="" id="logout">退出</a></h4>

            </div>

            <!-- 注册 -->

            <div id="reg">

                <h4>注册</h4>

                <div>

                    <p>用户名：<input type="text" name="username" id="username1"></p>

                    <p id="verifyUserNameMsg"></p>

                    <p>密码：<input type="password" name="password" id="password1"></p>

                    <p><input type="button" value="注册" id="btnReg" /></p>

                </div>

            </div>

            <!-- 登陆 -->

            <div id="login">

                <h4>登陆</h4>

                <div>

                    <p>用户名：<input type="text" name="username2" id="username2"></p>

                    <p>密码：<input type="password" name="password2" id="password2"></p>

                    <p><input type="button" value="登陆" id="btnLogin" /></p>

                </div>

            </div>

            <!-- 留言发表 -->

            <div id="sendBox">

                <h4>发表留言</h4>

                <div>

                    <textarea id="content"></textarea>

                    <input type="button" value="提交" class="btn1" id="btnPost" />

                </div>

            </div>

        </div>

    </div>

</body>

</html>
<?php

/**

 * @ controller Index.class.php

 * @ zmouse@vip.qq.com

 */

defined('IN_APP') or exit('Denied Access!');

class IndexController extends Controller {

    public function index() {

        echo '<p>欢迎</p>';

        //$result = $this->db->get("select * from users", 1);

        //dump($result);

    }

    /**

     * @ interface 用户名验证

     */

    public function verifyUserName() {

        $username = trim(isset($_REQUEST['username']) ? $_REQUEST['username'] : '');

        switch ($this->_verifyUserName($username)) {

            case 0:

                $this->sendByAjax(array('message'=>'恭喜你，该用户名可以注册！'));

                break;

            case 1:

                $this->sendByAjax(array('code'=>1,'message'=>'用户名长度不能小于3个或大于16个字符！'));

                break;

            case 2:

                $this->sendByAjax(array('code'=>2,'message'=>'对不起，该用户名已经被注册了！'));

                break;

            default:

                break;

        }

    }

    /**

     * @ interface 用户注册

     */

    public function reg() {

        $username = trim(isset($_REQUEST['username']) ? $_REQUEST['username'] : '');

        $password = trim(isset($_REQUEST['password']) ? $_REQUEST['password'] : '');

        $avatar = trim(isset($_REQUEST['avatar']) && in_array($_REQUEST['avatar'], array(1,2,3,4,5,6,7,8,9)) ? intval($_REQUEST['avatar']) : 1);

        if ($this->_verifyUserName($username) !== 0 || strlen($password)<3 || strlen($password) > 20) {

            $this->sendByAjax(array('code'=>1,'message'=>'注册失败！'));

        }

        $password = md5($password);

        if (false === $this->db->query("INSERT INTO `users` (`username`, `password`, `avatar`) VALUES ('{$username}', '{$password}', {$avatar})")) {

            $this->sendByAjax(array('code'=>1,'message'=>'注册失败！'));

        } else {

            $this->sendByAjax(array('message'=>'注册成功！'));

        }

    }

    /**

     * @ 用户登陆

     */

    public function login() {

        $username = trim(isset($_REQUEST['username']) ? $_REQUEST['username'] : '');

        $password = trim(isset($_REQUEST['password']) ? $_REQUEST['password'] : '');

        if (isset($_COOKIE['uid'])) {

            $this->sendByAjax(array('code'=>1,'message'=>'你已经登陆过了！'));

        }

        if ($rs = $this->db->get("SELECT * FROM `users` WHERE `username`='{$username}'")) {

            if ($rs['password'] != md5($password)) {

                $this->sendByAjax(array('code'=>1,'message'=>'登陆失败！'));

            } else {

                setcookie('uid', $rs['uid'], time() + 3600*60, '/');

                setcookie('username', $rs['username'], time() + 3600*60, '/');

                $this->sendByAjax(array('code'=>0,'message'=>'登陆成功！'));

            }

        } else {

            $this->sendByAjax(array('code'=>1,'message'=>'登陆失败！'));

        }

    }

    /**

     * @ 用户退出

     */

    public function logout() {

        if (!isset($_COOKIE['uid'])) {

            $this->sendByAjax(array('code'=>1,'message'=>'你还没有登陆！'));

        } else {

            setcookie('uid', 0, time() - 3600*60, '/');

            $this->sendByAjax(array('code'=>0,'message'=>'退出成功！'));

        }

    }

    /**

     * 用户留言保存

     */

    public function send() {

        if (!isset($_COOKIE['uid'])) {

            $this->sendByAjax(array('code'=>1,'message'=>'你还没有登陆！'));

        } else {

            $content = trim(isset($_POST['content']) ? $_POST['content'] : '');

            if (empty($content)) {

                $this->sendByAjax(array('code'=>1,'message'=>'留言内容不能为空！'));

            }

            $dateline = time();

            $this->db->query("INSERT INTO `contents` (`uid`, `content`, `dateline`) VALUES ({$_COOKIE['uid']}, '{$content}', {$dateline})");

            $returnData = array(

                'cid'        =>    $this->db->getInsertId(),

                'uid'        =>    $_COOKIE['uid'],

                'username'    =>    $_COOKIE['username'],

                'content'    =>    $content,

                'dateline'    =>    $dateline,

                'support'    =>    0,

                'oppose'    =>    0,

            );

            $this->sendByAjax(array('code'=>0,'message'=>'留言成功！','data'=>$returnData));

        }

    }

    /**

     * @ 顶

     */

    public function doSupport() {

        if (!isset($_COOKIE['uid'])) {

            $this->sendByAjax(array('code'=>1,'message'=>'你还没有登陆！'));

        } else {

            $cid = isset($_REQUEST['cid']) ? intval($_REQUEST['cid']) : 0;

            if (!$cid) $this->sendByAjax(array('code'=>1,'message'=>'无效留言cid！'));

            $content = $this->db->get("SELECT cid FROM `contents` WHERE `cid`={$cid}");

            if (!$content) $this->sendByAjax(array('code'=>1,'message'=>'不存在的留言cid！'));

            $this->db->query("UPDATE `contents` SET `support`=support+1 WHERE `cid`={$cid}");

            $this->sendByAjax(array('code'=>0,'message'=>'顶成功！'));

        }

    }

    /**

     * @ 踩

     */

    public function doOppose() {

        if (!isset($_COOKIE['uid'])) {

            $this->sendByAjax(array('code'=>1,'message'=>'你还没有登陆！'));

        } else {

            $cid = isset($_REQUEST['cid']) ? intval($_REQUEST['cid']) : 0;

            if (!$cid) $this->sendByAjax(array('code'=>1,'message'=>'无效留言cid！'));

            $content = $this->db->get("SELECT cid FROM `contents` WHERE `cid`={$cid}");

            if (!$content) $this->sendByAjax(array('code'=>1,'message'=>'不存在的留言cid！'));

            $this->db->query("UPDATE `contents` SET `oppose`=oppose+1 WHERE `cid`={$cid}");

            $this->sendByAjax(array('code'=>0,'message'=>'踩成功！'));

        }

    }

    /**

     * @ 获取留言列表

     */

    public function getList() {

        $page = isset($_REQUEST['page']) ? intval($_REQUEST['page']) : 1;    //当前页数

        $n = isset($_REQUEST['n']) ? intval($_REQUEST['n']) : 10;    //每页显示条数

        //获取总记录数

        $result_count = $this->db->get("SELECT count('cid') as count FROM `contents`");

        $count = $result_count['count'] ? (int) $result_count['count'] : 0;

        if (!$count) {

            $this->sendByAjax(array('code'=>1,'message'=>'还没有任何留言！'));

        }

        $pages = ceil($count / $n);

        if ($page > $pages) {

            $this->sendByAjax(array('code'=>2,'message'=>'没有数据了！'));

        }

        $start = ( $page - 1 ) * $n;

        $result = $this->db->select("SELECT c.cid,c.uid,u.username,c.content,c.dateline,c.support,c.oppose FROM `contents` as c, `users` as u WHERE u.uid=c.uid ORDER BY c.cid DESC LIMIT {$start},{$n}");

        $data = array(

            'count'    =>    $count,

            'pages'    =>    $pages,

            'page'    =>    $page,

            'n'        =>    $n,

            'list'    =>    $result

        );

        $this->sendByAjax(array('code'=>0,'message'=>'','data'=>$data));

    }

    /**

     * @ 用户名验证

     */

    private function _verifyUserName($username='') {

        if (strlen($username) < 3 || strlen($username) > 16) {

            return 1;

        }

        $rs = $this->db->get("SELECT `username` FROM `users` WHERE `username`='{$username}'");

        if ($rs) return 2;

        return 0;

    }

}

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