>[danger]上节课我们讲了如何开发插件，这一节课我们用一个实例来讲解如何开发一个评论插件
有些做过其他系统的插件开发的同学，再来学iWebShop的插件开发，很容易就上手，有些也可能发现iWebShop插件开发时，对前端页面的控制目前支持得还不是很灵活。因此，我做这个评论插件，我就采用以下方法开发：
后端维护的功能，用插件实现，前端评论，使用我们之前学的模板开发的方式来做
## 一、建立插件
在插件目录下增加“comment”目录，创建如下三个文件：
comment.php中加入以下代码：
~~~
class comment extends pluginBase{
//【必填】插件中文名称
public static function name()
{
return "三众科技评论插件";
}
//【必填】插件的功能简介
public static function description()
{
return "文章评论插件";
}
//安装插件代码
public static function install()
{
$commentDB = new IModel('article_comment');//表名article_comment
//判断表是否存在
if($commentDB->exists())
{
return true;
}
$data = array(
"comment" => self::name(),
"column" => array(
"id" => array("type" => "int(11) unsigned",'auto_increment' => 1),
"content" => array("type" => "text","comment" => "评论内容"),
"create_time" => array("type" => "int(11) unsigned","default" => "0","comment" => "评论时间"),
"recontents" => array("type" => "text","comment" => "回复内容"),
"recomment_time" => array("type" => "int(11) unsigned","default" => "0","comment" => "回复时间"),
"aid" => array("type" => "int(11) unsigned","default" => "0","comment" => "文章id"),
"uid" => array("type" => "int(11) unsigned","default" => "0","comment" => "用户id")
),
"index" => array("primary" => "id","key" => "aid,uid"),
);
$commentDB->setData($data);
//开始创建表
return $commentDB->createTable();
}
//卸载插件代码
public static function uninstall()
{
$commentDB = new IModel('article_comment');
//删除表
return $commentDB->dropTable();
}
//插件参数配置
public static function configName()
{
//在本拿了中无参数配置
}
}
~~~
之后在后台中就可以安装插件了
以上为每个插件必须的，如不需要操作数据库的，可以不用写数据库代码。
## 二、管理后台功能维护
功能注册，comment.php中加入以下代码：
~~~
public function reg()
{
//后台插件管理中增加该插件链接
plugin::reg("onSystemMenuCreate",function(){
$link = "/plugins/system_comment_list";
Menu::$menu["插件"]["插件管理"][$link] = $this->name();
});
//后台评论列表的链接
plugin::reg("onBeforeCreateAction@plugins@system_comment_list",function(){
self::controller()->system_comment_list = function(){$this->comment_list();};
});
//后台评论详情的链接
plugin::reg("onBeforeCreateAction@plugins@system_comment_edit",function(){
self::controller()->system_comment_edit = function(){$this->comment_edit();};
});
//后台评论回复的链接
plugin::reg("onBeforeCreateAction@plugins@system_comment_update",function(){
self::controller()->system_comment_update = function(){$this->comment_update();};
});
//后台评论删除的链接
plugin::reg("onBeforeCreateAction@plugins@system_comment_del",function(){
self::controller()->system_comment_del = function(){$this->comment_del();};
});
}
~~~
功能实现，comment.php中加入以下代码：
~~~
public function comment_list()
{
$this->redirect('system_comment_list');
}
public function comment_edit()
{
$id = IFilter::act(IReq::get('id'));
$commentDB = new IQuery('article_comment as c');
$commentDB->join=" left join article as b on c.aid = b.id left join user as a on c.uid = a.id ";
$commentDB->where=" c.id=$id ";
$commentDB->fields ="c.id,FROM_UNIXTIME(c.create_time) as create_time,a.username,b.title,c.recomment_time,c.recontents,c.content";
$items = $commentDB->find();
$this->redirect('system_comment_edit',array('comment' => current($items)));
}
//回复评论
public function comment_update()
{
$id = IFilter::act(IReq::get('id'));
$recontents = IFilter::act(IReq::get('recontents'));
$data = array();
$data['recontents']=$recontents;
$data['recomment_time']=time();
//保存数据库
$commentDB = new IModel('article_comment');
$commentDB->setData($data);
$commentDB->update('id = '.$id);
$this->redirect('system_comment_list');
}
//回复删除
public function comment_del()
{
$commentDB = new IModel('article_comment');
$id = IFilter::act(IReq::get('id'));
$commentDB->del('id = '.$id);
$this->redirect('system_comment_list');
}
~~~
后台管理页面，评论列表：system_comment_list.html
~~~
<div class="headbar">
<div class="position"><span>文章</span><span>></span><span>评论管理</span></div>
</div>
<form action="{url:/plugins/system_comment_del}" method="post" name="comment_list" onsubmit="return checkboxCheck('check[]','尚未选中任何记录！')">
<div class="content">
<table class="list_table">
<colgroup>
<col width="10px" />
<col width="100px" />
<col width="220px" />
<col width="75px" />
<col width="95px" />
</colgroup>
<thead>
<tr>
<th></th>
<th>评论人</th>
<th>评论文章</th>
<th>评论时间</th>
<th>操作</th>
</tr>
</thead>
<tbody>
{set:$page= (isset($_GET['page'])&&(intval($_GET['page'])>0))?intval($_GET['page']):1;}
{query: name=article_comment as c join=left join article as b on c.aid eq b.id left join user as a on c.uid eq a.id fields=c.id,FROM_UNIXTIME(c.create_time) as create_time,a.username,b.title,c.recomment_time page=$page order = c.id desc}
<tr>
<td></td>
<td>{$item['username']}</td>
<td>{$item['title']}</td>
<td>{$item['create_time']}</td>
<td>
<a href="{url:/plugins/system_comment_edit/id/$item[id]}"><img class="operator" src="{skin:images/admin/icon_check.gif}" alt="查看" /></a>
<a href="javascript:void(0)" onclick="delModel({link:'{url:/plugins/system_comment_del/id/$item[id]}'})"><img class="operator" src="{skin:images/admin/icon_del.gif}" alt="删除" /></a>
</td>
</tr>
{/query}
</tbody>
</table>
</div>
{$query->getPageBar()}
</form>
~~~
后台管理页面，评论详情：system_comment_edit.html
~~~
<div class="headbar">
<div class="position"><span>文章</span><span>></span><span>查看评论</span></div>
<div class="operating">
<a href="{url:/plugins/system_comment_list}"><button class="operating_btn" type="button"><span class="return">返回</span></button></a>
</div>
</div>
<div class="content_box">
<div class="content form_content">
<form action="{url:/plugins/system_comment_update}" method="post" name="comment_edit">
<input type="hidden" value="{$comment['id']}" name="id" />
<table class="form_table">
<colgroup>
<col width="150px" />
<col />
</colgroup>
<tr>
<th>评论人：</th>
<td>{$comment['username']}</td>
</tr>
<tr>
<th>评论时间：</th><td>{$comment['create_time']}</td>
</tr>
<tr>
<th>评论文章：</th><td>{$comment['title']}</td>
</tr>
<tr>
<th>评论内容：</th><td>{$comment['content']}</td>
</tr>
<tr>
<th>回复评论：</th>
<td><textarea class='normal' name='recontents'>{$comment['recontents']}</textarea></td>
</tr>
<tr>
<th></th>
<td>
<button type='submit' class='submit'><span>确定</span></button>
</td>
</tr>
</table>
</form>
</div>
</div>
~~~
评论列表页：
评论详情页面：
## 三、前台功能
找到site\article，加入以下代码，用于显示评论
~~~
<div class="comment_list box">
{set:$where="c.aid=".$this->articleRow['id'];}
{set:$page= (isset($_GET['page'])&&(intval($_GET['page'])>0))?intval($_GET['page']):1;}
{query: name=article_comment as c join=left join user as a on c.uid eq a.id fields=c.id,c.content,FROM_UNIXTIME(c.create_time) as create_time,a.username,c.recomment_time,FROM_UNIXTIME(c.recomment_time) as reply_time,c.recontents page=$page pagesize=3 where=$where order = c.id desc}
<div class="item">
<div class="user">
<div class="ico"><img src="{webroot:<%=head_ico%>}" width="70px" height="70px" onerror="this.src='{skin:images/front/user_ico.gif}'" /></div>
<span class="blue">{$item['username']}</span>
</div>
<dl class="desc gray">
<p>
<img src="{skin:images/front/comm.gif}" width="16px" height="17px" />
<b>评论内容：</b><span class="f_r">{$item['create_time']}</span>
</p>
<p class="indent">{$item['content']}</p>
{if:$item['recomment_time']>0}
<hr />
<p class="bg_gray"><img src="{skin:images/front/answer.gif}" width="16px" height="17px" />
<b class="orange">回复：</b>
<span class="f_r">{$item['reply_time']}</span></p>
<p class="indent bg_gray">{$item['recontents']}</p>
{/if}
</dl>
</div>
{/query}
{$query->getPageBar()}
</div>
<div class="wrap_box">
<form method="post" action="{url:/site/article_comment_add}">
<input type="hidden" name="aid" value="{$this->articleRow['id']}" />
<table class="form_table f_l">
<tr>
<th>评论内容：</th><td valign="top"><textarea name="content" id="content"></textarea></td>
</tr>
<tr><td></td><td><label class="btn"><input type="submit" value="评论" /></label></td></tr>
</table>
</form>
</div>
~~~
打开site.php，加入以下代码
~~~
public function article_comment_add()
{
if(!isset($this->user['user_id']) || !$this->user['user_id'])
{
IError::show(403,"未登录用户不能评论");
}
if(!IReq::get('aid'))
{
IError::show(403,"传递的参数不完整");
}
if(trim(IReq::get('content'))=="")
{
IError::show(403,"评论必须输入");
}
$aid = IFilter::act(IReq::get('aid'),'int');
$data = array(
'content' => IFilter::act(IReq::get("content")),
'create_time' => time(),
'aid'=>$aid,
'uid'=>$this->user['user_id'],
);
$tb_comment = new IModel("article_comment");
$tb_comment->setData($data);
$re = $tb_comment->add();
if($re)
{
$this->redirect("/site/article_detail/id/".$aid);
}
else
{
IError::show(403,"评论失败");
}
}
~~~
以下代码用于实现评论提交功能。
### 后记
以上只是举了一个例子说明如何做一个插件，还有前台的视图和控制器的代码实现，但就目前而言，iwebShop的插件还是比较适合做那些没界面的功能，或是在线留言等这些js控件的前端功能，一旦前台界面有交互，还是用非插件的模式实现比较方便点，每个工具都有优缺点，能实现功能的就是好工具
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