Source for file jZone.class.php

Documentation is available at jZone.class.php

<?php
/**
* @package jelix
* @subpackage utils
* @author Croes Gérald, Laurent Jouanneau
* @contributor Laurent Jouanneau
*
* This class was get originally from the Copix project (CopixZone, Copix 2.3dev20050901, http://www.copix.org)
* Some lines of code are copyrighted 2001-2005 CopixTeam (LGPL licence).
* Initial authors of this Copix classes are Gerald Croes and Laurent Jouanneau,
* and this class was adapted/improved for Jelix by Laurent Jouanneau
*
* @link http://www.jelix.org
* @licence http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public Licence, see LICENCE file
*/
/**
* jZone is a representation of a zone in an response content, in a html page.
* A user zone should inherits from jZone. jZone provide a cache mecanism.
* @package jelix
* @subpackage utils
*/
class jZone {
/**
* If we're using cache on this zone
* You should override it in your class if you want activate the cache
* @var boolean
*/
protected $_useCache = false;
/**
* cache timeout (seconds).
* set to 0 if you want to delete cache manually.
* @var integer
*/
protected $_cacheTimeout = 0;
/**
* list of zone parameters
* @var array
*/
protected $_params;
/**
* template selector
* If you want to use a template for your zone, set its name in this property
* in your zone, and override _prepareTpl. Else, keep it to empty string, and
* override _createContent
* @var string
*/
protected $_tplname='';
/**
* says the type of the output of the template, in the case of the result
* of the zone is not used in a response in the same output type.
* For example, the output type of a ajax response is text, but the template
* can contains html, so the template should be treated as html content,
* so you should put 'html' here.
* If empty, the output type will be the output type of the current response.
* @var string
* @see jTpl::fetch
*/
protected $_tplOuputType='';
/**
* the jtpl object created automatically by jZone if you set up _tplname
* you can use it in _prepareTpl
* @var jTpl
*/
protected $_tpl=null;
/**
* When the cache system is activated, says if the cache should be generated or not
* you set it to false in _createContent or _prepareTpl, in specific case.
* @var boolean
*/
protected $_cancelCache=false;
/**
* constructor.
*/
function __construct($params=array()){
$this->_params = $params;
}
/**
* get the content of a zone
* @param string $name zone selector
* @param array $params parameters for the zone
* @return string the generated content of the zone
* @since 1.0b1
*/
public static function get ($name, $params=array ()){
return self::_callZone($name, 'getContent', $params);
}
/**
* clear a specific cache of a zone
* @param string $name zone selector
* @param array $params parameters for the zone
* @since 1.0b1
*/
public static function clear ($name, $params=array ()){
return self::_callZone($name, 'clearCache', $params);
}
/**
* clear all zone cache or all cache of a specific zone
* @param string $name zone selector
* @since 1.0b1
*/
public static function clearAll($name=''){
$dir = JELIX_APP_TEMP_PATH.'zonecache/';
if(!file_exists($dir)) return;
if($name !=''){
$sel = new jSelectorZone($name);
$fic = '~'.$sel->module.'~'.strtolower($sel->resource).'zone~';
}else{
$fic = '~';
}
if ($dh = opendir($dir)) {
while (($file = readdir($dh)) !== false) {
if(strpos($file, $fic) === 0){
unlink($dir.$file);
}
}
closedir($dh);
}
}
/**
* gets the value of a parameter, if defined. Returns the default value instead.
* @param string $paramName the parameter name
* @param mixed $defaultValue the parameter default value
* @return mixed the param value
*/
public function getParam ($paramName, $defaultValue=null){
return array_key_exists ($paramName, $this->_params) ? $this->_params[$paramName] : $defaultValue;
}
/**
* get the zone content
* Return the cache content if it is activated and if it's exists, or call _createContent
* @return string zone content
*/
public function getContent (){
if ($this->_useCache){
$f = $this->_getCacheFile();
if(file_exists($f)){
if($this->_cacheTimeout > 0){
clearstatcache();
if(time() - filemtime($f) > $this->_cacheTimeout){
// timeout : regenerate the cache
unlink($f);
$this->_cancelCache=false;
$content=$this->_createContent();
if(!$this->_cancelCache){
jFile::write($f,$content);
}
return $content;
}
}
if($this->_tplname != ''){
$this->_tpl = new jTpl();
$this->_tpl->assign($this->_params);
$this->_tpl->meta($this->_tplname, $this->_tplOuputType);
}
$content = file_get_contents($f);
}else{
$this->_cancelCache=false;
$content=$this->_createContent();
if(!$this->_cancelCache){
jFile::write($f,$content);
}
}
}else{
$content=$this->_createContent();
}
return $content;
}
/**
* Delete the cache of the current zone
*/
public function clearCache (){
if ($this->_useCache){
$f = $this->_getCacheFile();
if(file_exists($f)){
unlink($f);
}
}
}
/**
* create the content of the zone
* by default, it uses a template, and so prepare a jtpl object to use in _prepareTpl.
* zone parameters are automatically assigned in the template
* If you don't want a template, override it in your class
* @return string generated content
*/
protected function _createContent (){
$this->_tpl = new jTpl();
$this->_tpl->assign($this->_params);
$this->_prepareTpl();
if($this->_tplname == '') return '';
return $this->_tpl->fetch($this->_tplname, $this->_tplOuputType);
}
/**
* override this method if you want do additionnal thing on the template object
* Example : do access to a dao object.. Note : the template object
* is in the _tpl property
*/
protected function _prepareTpl(){
}
/**
* create the cache filename
* @return string the filename
*/
private function _getCacheFile (){
$module = jContext::get ();
$ar = $this->_params;
ksort($ar);
$id=md5(serialize($ar));
return JELIX_APP_TEMP_PATH.'zonecache/~'.$module.'~'.strtolower(get_class($this)).'~'.$id.'.php';
}
/**
* instancy a zone object, and call one of its methods
* @param string $name zone selector
* @param string $method method name
* @param array $params arguments for the method
* @return mixed the result returned by the method
*/
private static function _callZone($name,$method, &$params){
$sel = new jSelectorZone($name);
jContext::push ($sel->module);
$fileName = $sel->getPath();
require_once($fileName);
$className = $sel->resource.'Zone';
$zone = new $className ($params);
$toReturn = $zone->$method ();
jContext::pop ();
return $toReturn;
}
}
?>

Documentation generated on Wed, 07 Sep 2011 13:48:16 +0200 by phpDocumentor 1.4.3