/libs/system/SwooleTemplate.php

<?php

/**

 * Swoole模板工具类

 * 提供一个简单的模板系统，支持标签、模板数据库映射查询，遍历，显示等功能

 * @author Tianfeng.Han

 * @package SwooleSystem

 * @subpackage template

 *

 */

class SwooleTemplate extends ArrayObject

{

	public $templates_dir;

	

	public $in_content='';

	public $out_content='';

	public $c_content='';

		

	public $pattern;

	

	public $db;

	

	public $fields;

	public $fields_full;

	

	const FILTER_DIR = '/taglib/filter/';

	

	function __construct($db)

	{

		$this->db = $db;

	}

	

	function parse($tpl_name)

	{

		

		$filename = WEBPATH.$this->templates_dir.$tpl_name;

		$this->c_content = $this->in_content = file_get_contents($filename);

		

		$tags=array();

		$this->pattern = "#".preg_quote('{{','~')."[^}]+".preg_quote('}}','~')."#i";

        preg_match_all($this->pattern,$this->in_content,$tags,PREG_PATTERN_ORDER);		

        $tags=$tags[0];

        

		foreach($tags as $tag)

		{

			$tagname=self::trim($tag);

			$exp=explode(":",$tagname);

			if(count($exp)>2) die("错误的标签:".$tag);

			if(count($exp)==1) continue;

			$this->parse_static($tag);

			call_user_func_array(array($this,'proc_'.$exp[0]),array(trim($exp[1]),$tag));

		}

		$this->end();

		echo $this->out_content;

	}



	function assign($key,$value)

	{

		$this->$key=$value;

	}

	

	function proc_var($tag,$tag_head)

	{

		$this->c_content = str_replace($tag_head,$this->$tag,$this->c_content);



//		$params=explode(".",$varname);

//		$varnum=count($params);

//		if($varnum==1)

//		{

//			return $$varname;

//		}

//		elseif($varnum==2)

//		{

//			$arrayname=$params[0];

//			$array=$$arrayname;

//			return $array[$params[1]];

//		}

	}

	

	public static function parse_param($tagbody)

	{

		$rs = array();

		$list= explode(" ",$tagbody);

		foreach($list as $val)

		{

			$arr=explode("=",$val,2);

			$rs[$arr[0]]=$arr[1];

		}

		return $rs;

	}

	

	function proc_records($tag,$tag_head)

	{

		$param = self::parse_param($tag);

		$select = new SelectDB($this->db);

		$select->put($param);

		$body = $this->get_body('records');

		$list = $select->getall();

		

		$content = '';

		

		foreach($list as $record)

		{

			$content.=$this->parse_record_body($body,$record);

		}

		$this->out_content.=$content;

		$this->clear('records');

	}

	

	function proc_record($tag,$tag_head)

	{

		$param = self::parse_param($tag);

		$record_name = $param['_name'];

		$record_field = $param['_field'];

		if($this->$record_name!=false) $record=$this->$record_name;

		else

		{

			$select = new SelectDB($this->db);

			$select->put($param);

			$record = $select->getone();

			$this->$record_name = $record;

		}

		$this->out_content.=$record[$record_field];

		$this->c_content = str_replace($tag_head,'',$this->c_content);

	}

	

	function parse_record_body($line,$record)

	{

		$vals = array();

		preg_match_all($this->pattern,$line,$vals);

		$vals=$vals[0];

		foreach($vals as $val) $line=str_replace($val,$record[self::trim($val)],$line);

		return $line;

	}

	

	function clear($tagname)

	{

		$end_tag = '{{/'.$tagname.'}}';

		$pos_e = mb_strpos($this->c_content,$end_tag);		

		$this->c_content = substr($this->c_content,$pos_e+strlen($end_tag),-1);

	}

	

	function parse_static($tag)

	{

		$pos = strpos($this->c_content,$tag);

		$this->out_content.= substr($this->c_content,0,$pos);

		$this->c_content = substr($this->c_content,$pos,strlen($this->c_content)-$pos);

	}

	

	function end()

	{

		$this->out_content.=$this->c_content;

	}

	

	function get_body($tagname)

	{

		$end_tag = '{{/'.$tagname.'}}';

		$pos_s = mb_strpos($this->c_content,'}}')+2;

		$pos_e = mb_strpos($this->c_content,$end_tag);

		return mb_substr($this->c_content,$pos_s,$pos_e-$pos_s);

	}

	

	function trim($string)

	{

		return str_replace('}}',"",str_replace('{{',"",$string));

	}

	

	function get_fields($body)

	{

		preg_match_all('#{([^\}^|]+)[}|]#i',$body,$vals);

		$this->fields = array_unique($vals[1]);

		

		preg_match_all('#{([^\}]+)}#i',$body,$vals);

		

		$this->fields_full = $vals[1];

		return $this->fields;

	}

	

	function parse_loop($data,$body)

	{

		$content = '';

		if(empty($this->fields_full))

			$this->get_fields($body);

				

		foreach($data as $record)

		{

			$line = $body;

			

			foreach($this->fields_full as $field)

			{

				$this->filter($line,$field,$record);

			}

			$content.=$line;

		}

		return $content;

	}

	

	function filter(&$line,$field,&$record)

	{

		$f = explode('|',$field);

		$field_name = $f[0];

		unset($f[0]);

		$value = $record[$field_name];

		foreach($f as $filter)

		{

			$f_params = explode(':',$filter);

			self::_load_filter($f_params[0]);

			$func = 'swoole_filter_'.$f_params[0];

			$f_params[0] = $field_name;

			$value = $func($value,$f_params,$record);

		}

		$line = str_replace('{'.$field.'}',$value,$line);

	}

	

	static function _load_filter($filter_name)

	{

		require_once(LIBPATH.self::FILTER_DIR.$filter_name.'.filter.php');

	}

}

?>