<?php
// +----------------------------------------------------------------------
// | ThinkPHP
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id$

import('TagLib');

/**
 +------------------------------------------------------------------------------
 * CX标签库解析类
 +------------------------------------------------------------------------------
 * @category   Think
 * @package  Think
 * @subpackage  Template
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id$
 +------------------------------------------------------------------------------
 */
class TagLibCx extends TagLib
{//类定义开始
    
    public function _space($attr,$content)
    {
        $tag = $this->parseXmlAttr($attr,'space');
        $uid = $tag['uid'];
        $class = ($tag['class'])?$tag['class']:"";
        $target = ($tag['target'])?$tag['target']:"";
        $uid = $this->autoBuildVar($uid);
        return "<php>echo getUserSpace($uid,'$class','$target','$content')</php>";
    }    

    /**
     +----------------------------------------------------------
     * comment标签解析
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _comment($attr)
    {
        return '';
    }

    /**
     +----------------------------------------------------------
     * php标签解析
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _php($attr,$content) {
        $parseStr = '<?php '.$content.' ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * iterator标签解析 循环输出iterator变量的值
     * 格式：
     * <iterate name="userList" id="user" empty="" >
     * {user.username}
     * {user.email}
     * </iterate>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|void
     +----------------------------------------------------------
     */
    public function _iterate($attr,$content)
    {
        static $_iterateParseCache = array();
        //如果已经解析过，则直接返回变量值
        $cacheIterateId = md5($attr.$content);
        if(isset($_iterateParseCache[$cacheIterateId]))
            return $_iterateParseCache[$cacheIterateId];

        $tag      = $this->parseXmlAttr($attr,'iterate');
        $name   = $tag['name'];
        $id        = $tag['id'];
        $empty  = isset($tag['empty'])?$tag['empty']:'';
        $key     =   !empty($tag['key'])?$tag['key']:'i';
        $mod    =   isset($tag['mod'])?$tag['mod']:'2';
        $name   = $this->autoBuildVar($name);
        $parseStr  =  '<?php if(is_array('.$name.')): ?>';
        $parseStr   .= '<?php $'.$key.' = 0;?>';
		if(isset($tag['length']) && '' !=$tag['length'] ) {
			$parseStr  .= '<?php $__LIST__ = array_slice('.$name.','.$tag['offset'].','.$tag['length'].') ?>';
		}elseif(isset($tag['offset'])  && '' !=$tag['offset']){
            $parseStr  .= '<?php $__LIST__ = array_slice('.$name.','.$tag['offset'].') ?>';
        }else{
            $parseStr .= '<?php $__LIST__ = '.$name.'?>';
        }
        $parseStr .= '<?php if( count($__LIST__)==0 ) : echo "'.$empty.'" ; ?>';
        $parseStr .= '<?php else: ?>';
        $parseStr .= '<?php foreach($__LIST__ as $key=>$'.$id.'): ?>';
        $parseStr .= '<?php ++$'.$key.';?>';
        $parseStr .= '<?php $mod = ($'.$key.' % '.$mod.' )?>';
        $parseStr .= $this->tpl->parse($content);
        $parseStr .= '<?php endforeach; ?>';
        $parseStr .=  '<?php endif; ?>';
        $parseStr .= '<?php else: echo "'.$empty.'" ;?>';
        $parseStr .=  '<?php endif; ?>';
        $_iterateParseCache[$cacheIterateId] = $parseStr;

        if(!empty($parseStr)) {
            return $parseStr;
        }
        return ;
    }

    public function _volist($attr,$content) {
        return $this->_iterate($attr,$content);
    }

    public function _resultset($attr,$content) {
        return $this->_iterate($attr,$content);
    }

    public function _sublist($attr,$content) {
        return $this->_iterate($attr,$content);
    }

    public function _foreach($attr,$content)
    {
        static $_iterateParseCache = array();
        //如果已经解析过，则直接返回变量值
        $cacheIterateId = md5($attr.$content);
        if(isset($_iterateParseCache[$cacheIterateId]))
            return $_iterateParseCache[$cacheIterateId];

        $tag   = $this->parseXmlAttr($attr,'foreach');
        $name= $tag['name'];
        $item  = $tag['item'];
        $key   =   !empty($tag['key'])?$tag['key']:'key';
        $name= $this->autoBuildVar($name);
        $parseStr  =  '<?php if(isset('.$name.')): ?>';
        $parseStr .= '<?php foreach('.$name.' as $'.$key.'=>$'.$item.'): ?>';
        $parseStr .= $this->tpl->parse($content);
        $parseStr .= '<?php endforeach; ?>';
        $parseStr .=  '<?php endif; ?>';
        $_iterateParseCache[$cacheIterateId] = $parseStr;

        if(!empty($parseStr)) {
            return $parseStr;
        }
        return ;
    }

    public function _subeach($attr,$content)
    {
        return $this->_foreach($attr,$content);
    }

    public function _url($attr) {
        $tag      = $this->parseXmlAttr($attr,'url');
        $action   =   !empty($tag['action'])?$tag['action']:ACTION_NAME;
        $module =   !empty($tag['module'])?$tag['module']:MODULE_NAME;
        $route     =   !empty($tag['route'])?$tag['route']:'';
        $app     =   !empty($tag['app'])?$tag['app']:APP_NAME;
        $params =  !empty($tag['params'])?$tag['params']:'';
        $parseStr=   '<?php echo url("'.$action.'","'.$module.'","'.$route.'","'.$app.'","'.$params.'");?>';
        return $parseStr;
    }

    public function _var($attr) {
        $tag          =   $this->parseXmlAttr($attr,'var');
        $name       = $tag['name'];
        $default     =  !empty($tag['default'])?$tag['default']:'';
        $varArray   = explode('|',$name);
        $name       =   array_shift($varArray);
        $name       = $this->autoBuildVar($name);
        if(count($varArray)>0) {
            $name = $this->tpl->parseVarFunction($name,$varArray);
        }
        if(!empty($default)) {
            $name   = '('.$name.')?('.$name.'):\''.$default.'\'';
        }
        $parseStr   =   '<?php echo ('.$name.');?>';
        return $parseStr;
    }

    public function _defined($attr,$content)
    {
        $tag        = $this->parseXmlAttr($attr,'defined');
        $name     = $tag['name'];
        $parseStr = '<?php if(defined("'.$name.'")): ?>';
        $parseStr .= $content.'<?php endif; ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * if标签解析
     * 格式：
     * <if condition=" $a eq 1" >
     * <elseif condition="$a eq 2" />
     * <else />
     * </if>
     * 表达式支持 eq neq gt egt lt elt == > >= < <= or and || &&
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _if($attr,$content) {
        $tag          = $this->parseXmlAttr($attr,'if');
        $condition   = $this->parseCondition($tag['condition']);
        $parseStr  = '<?php if('.$condition.'): ?>'.$content.'<?php endif; ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * else标签解析
     * 格式：见if标签
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _elseif($attr,$content) {
        $tag          = $this->parseXmlAttr($attr,'elseif');
        $condition   = $this->parseCondition($tag['condition']);
        $parseStr   = '<?php elseif('.$condition.'): ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * else标签解析
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _else($attr) {
        $parseStr = '<?php else: ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * switch标签解析
     * 格式：
     * <switch name="$a.name" >
     * <case value="1" break="false">1</case>
     * <case value="2" >2</case>
     * <default />other
     * </switch>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _switch($attr,$content) {
        $tag = $this->parseXmlAttr($attr,'switch');
        $name = $tag['name'];
        $varArray = explode('|',$name);
        $name   =   array_shift($varArray);
        $name = $this->autoBuildVar($name);
        if(count($varArray)>0)
            $name = $this->tpl->parseVarFunction($name,$varArray);
        $parseStr = '<?php switch('.$name.'): ?>'.$content.'<?php endswitch;?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * case标签解析 需要配合switch才有效
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _case($attr,$content) {
        $tag = $this->parseXmlAttr($attr,'case');
		$value = $tag['value'];
        if('$' == substr($value,0,1)) {
            $varArray = explode('|',$value);
            $value	=	array_shift($varArray);
			$value  =  $this->autoBuildVar(substr($value,1));
			if(count($varArray)>0)
				$value = $this->tpl->parseVarFunction($value,$varArray);
            $value   =  'case '.$value.': ';
        }elseif(strpos($value,'|')){
            $values  =  explode('|',$value);
            $value   =  '';
            foreach ($values as $val){
                $value   .=  'case "'.addslashes($val).'": ';
            }
        }else{
			$value	=	'case "'.$value.'": ';
		}
        $parseStr = '<?php '.$value.' ?>'.$content;
		if('' ==$tag['break'] || $tag['break']) {
			$parseStr .= '<?php break;?>';
		}
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * default标签解析 需要配合switch才有效
     * 使用： <default />ddfdf
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string
     +----------------------------------------------------------
     */
    public function _default($attr) {
        $parseStr = '<?php default: ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * compare标签解析
     * 用于值的比较 支持 eq neq gt lt egt elt heq nheq 默认是eq
     * 格式： <compare name="" type="eq" value="" >content</compare>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|void
     +----------------------------------------------------------
     */
    public function _compare($attr,$content,$type='eq')
    {
        $tag      = $this->parseXmlAttr($attr,'compare');
        $name   = $tag['name'];
        $value   = $tag['value'];
        $type    =   $tag['type']?$tag['type']:$type;
        $type    =   $this->parseCondition(' '.$type.' ');
        $varArray = explode('|',$name);
        $name   =   array_shift($varArray);
        $name = $this->autoBuildVar($name);
        if(count($varArray)>0)
            $name = $this->tpl->parseVarFunction($name,$varArray);
        if('$' == substr($value,0,1)) {
            $value  =  $this->autoBuildVar(substr($value,1));
        }else {
            $value  =   '"'.$value.'"';
        }
        $parseStr = '<?php if(('.$name.') '.$type.' '.$value.'): ?>'.$content.'<?php endif; ?>';
        return $parseStr;
    }

    public function _eq($attr,$content) {
        return $this->_compare($attr,$content,'eq');
    }

    public function _equal($attr,$content) {
        return $this->_eq($attr,$content);
    }

    public function _neq($attr,$content) {
        return $this->_compare($attr,$content,'neq');
    }

    public function _notequal($attr,$content) {
        return $this->_neq($attr,$content);
    }

    public function _gt($attr,$content) {
        return $this->_compare($attr,$content,'gt');
    }

    public function _lt($attr,$content) {
        return $this->_compare($attr,$content,'lt');
    }

    public function _egt($attr,$content) {
        return $this->__compare($attr,$content,'egt');
    }

    public function _elt($attr,$content) {
        return $this->_compare($attr,$content,'elt');
    }

    public function _heq($attr,$content) {
        return $this->_compare($attr,$content,'heq');
    }

    public function _nheq($attr,$content) {
        return $this->_compare($attr,$content,'nheq');
    }

    /**
     +----------------------------------------------------------
     * present标签解析
     * 如果某个变量已经设置 则输出内容
     * 格式： <present name="" >content</present>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|void
     +----------------------------------------------------------
     */
    public function _present($attr,$content)
    {
        $tag      = $this->parseXmlAttr($attr,'present');
        $name   = $tag['name'];
        $name   = $this->autoBuildVar($name);
        $parseStr  = '<?php if(isset('.$name.')): ?>'.$content.'<?php endif; ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * notpresent标签解析
     * 如果某个变量没有设置，则输出内容
     * 格式： <notpresent name="" >content</notpresent>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|void
     +----------------------------------------------------------
     */
    public function _notpresent($attr,$content)
    {
        $tag      = $this->parseXmlAttr($attr,'notpresent');
        $name   = $tag['name'];
        $name   = $this->autoBuildVar($name);
        $parseStr  = '<?php if(!isset('.$name.')): ?>'.$content.'<?php endif; ?>';
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * session标签解析
     * 如果某个session变量已经设置 则输出内容
     * 格式： <session name="" >content</session>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|void
     +----------------------------------------------------------
     */
    public function _session($attr,$content)
    {
        $tag  = $this->parseXmlAttr($attr,'session');
        $name  = $tag['name'];
        if(strpos($name,'|')) {
            $array  =   explode('|',$name);
            $parseStr  = '<?php if( ';
            for($i=0; $i<count($array); $i++) {
                $parseStr  .= 'isset($_SESSION["'.$array[$i].'"]) || ';
            }
            $parseStr   =   substr($parseStr,0,-3);
            $parseStr  .='): ?>'.$content.'<?php endif; ?>';
        }elseif(strpos($name,',')) {
            $array  =   explode(',',$name);
            $parseStr  = '<?php if( ';
            for($i=0; $i<count($array); $i++) {
                $parseStr  .= 'isset($_SESSION["'.$array[$i].'"]) && ';
            }
            $parseStr   =   substr($parseStr,0,-3);
            $parseStr  .='): ?>'.$content.'<?php endif; ?>';
        }else {
            $parseStr  = '<?php if(isset($_SESSION["'.$name.'"])): ?>'.$content.'<?php endif; ?>';
        }
        return $parseStr;
    }

    /**
     +----------------------------------------------------------
     * notsession标签解析
     * 如果某个session变量没有设置 则输出内容
     * 格式： <notsession name="" >content</notsession>
     +----------------------------------------------------------
     * @access public
     +----------------------------------------------------------
     * @param string $attr 标签属性
     * @param string $content  标签内容
     +----------------------------------------------------------
     * @return string|void
     +----------------------------------------------------------
     */
    public function _nosession($attr,$content)
    {
        $tag  = $this->parseXmlAttr($attr,'nosession');
        $name  = $tag['name'];
        if(strpos($name,'|')) {
            $array  =   explode('|',$name);
            $parseStr  = '<?php if( ';
            for($i=0; $i<count($array); $i++) {
                $parseStr  .= '!isset($_SESSION["'.$array[$i].'"]) || ';
            }
            $parseStr   =   substr($parseStr,0,-3);
            $parseStr  .='): ?>'.$content.'<?php endif; ?>';
        }elseif(strpos($name,',')) {
            $array  =   explode(',',$name);
            $parseStr  = '<?php if( ';
            for($i=0; $i<count($array); $i++) {
                $parseStr  .= '!isset($_SESSION["'.$array[$i].'"]) && ';
            }
            $parseStr   =   substr($parseStr,0,-3);
            $parseStr  .='): ?>'.$content.'<?php endif; ?>';
        }else {
            $parseStr  = '<?php if( !isset($_SESSION["'.$name.'"])): ?>'.$content.'<?php endif; ?>';
        }

        return $parseStr;
    }

    public function _layout($attr,$content) {
        $tag      = $this->parseXmlAttr($attr,'layout');
        $name   =   $tag['name'];
        $cache   =   $tag['cache']?$tag['cache']:0;
        $parseStr=   "<!-- layout::$name::$cache -->";
        return $parseStr;
    }
}//类定义结束
?>