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tag_processor.php
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Mon, Jun 30, 7:14 AM

tag_processor.php
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<?php
/**
* @version $Id: tag_processor.php 15601 2012-11-02 14:18:43Z alex $
* @package In-Portal
* @copyright Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
* @license GNU/GPL
* In-Portal is Open Source software.
* This means that this software may have been modified pursuant
* the GNU General Public License, and as distributed it includes
* or is derivative of works licensed under the GNU General Public License
* or other free or open source software licenses.
* See http://www.in-portal.org/license for copyright notices and details.
*/
defined('FULL_PATH') or die('restricted access!');
class kTagProcessor extends kBase {
/**
* Returns joined prefix and special if any
*
* @param bool $from_submit if true, then joins prefix & special by "_", uses "." otherwise
* @return string
* @access public
*/
public function getPrefixSpecial($from_submit = false)
{
if (!$from_submit) {
return parent::getPrefixSpecial();
}
return rtrim($this->Prefix . '_' . $this->Special, '_');
}
/**
* Processes tag
*
* @param _BlockTag $tag
* @return string
* @access public
*/
function ProcessTag(&$tag)
{
return $this->ProcessParsedTag($tag->Tag, $tag->NP, $tag->getPrefixSpecial());
}
/**
* Checks, that tag is implemented in this tag processor
*
* @param string $tag
* @param string $prefix
*
* @return bool
* @access public
*/
public function CheckTag($tag, $prefix)
{
$method = $tag;
if ( method_exists($this, $method) ) {
return true;
}
if ( $this->Application->hasObject('TagsAggregator') ) {
$aggregator = $this->Application->recallObject('TagsAggregator');
/* @var $aggregator kArray */
$tmp = $this->Application->processPrefix($prefix);
$tag_mapping = $aggregator->GetArrayValue($tmp['prefix'], $method);
if ( $tag_mapping ) {
return true;
}
}
return false;
}
function FormCacheKey($tag, $params, $prefix)
{
// link tag to it's template
$reg_exp = '/^' . preg_quote(FULL_PATH, '/') . '/';
$template_path = preg_replace($reg_exp, '', $this->Application->Parser->TempalteFullPath, 1);
$element = 'file=' . $template_path . ':' . $prefix . '_' . $tag . '_' . crc32( serialize($params) );
return $this->Application->Parser->FormCacheKey($element);
}
function ProcessParsedTag($tag, $params, $prefix, $file='unknown', $line=0)
{
$Method = $tag;
if ( method_exists($this, $Method) ) {
if ( defined('DEBUG_MODE') && defined('DBG_SHOW_TAGS') && DBG_SHOW_TAGS && $this->Application->isDebugMode() ) {
$this->Application->Debugger->appendHTML('Processing PreParsed Tag ' . $Method . ' in ' . $this->Prefix);
}
list ($prefix_only,) = explode('.', $prefix);
$this->Application->Parser->PrefixesInUse[$prefix_only] = 1;
$cache_key = '';
$backup_prefix = $this->Prefix;
$backup_special = $this->Special;
if ( $this->Application->Parser->CachingEnabled && array_key_exists('cache_timeout', $params) ) {
// individual tag caching
$cache_key = $this->FormCacheKey($tag, $params, $prefix);
$res = $this->Application->Parser->getCache($cache_key);
if ( $res !== false ) {
return $res;
}
}
$original_params = $params;
$flag_values = $this->PreparePostProcess($params);
// pass_params for non ParseBlock tags :)
if ( $flag_values['pass_params'] ) {
$params = array_merge($this->Application->Parser->Params, $params);
}
$ret = $this->$Method($params);
$this->Init($backup_prefix, $backup_special);
$ret = $this->PostProcess($ret, $flag_values);
if ( $this->Application->Parser->CachingEnabled && $flag_values['cache_timeout'] ) {
$this->Application->Parser->setCache($cache_key, $ret, (int)$flag_values['cache_timeout']);
}
return $ret;
}
else {
list ($ret, $tag_found) = $this->processAggregatedTag($tag, $params, $prefix, $file, $line);
if ( $tag_found ) {
return $ret;
}
$error_tag = Array ('file' => $file, 'line' => $line);
throw new ParserException('Undefined tag: <strong>' . $prefix . ':' . $tag . '</strong>', 0, null, $error_tag);
return false;
}
}
function processAggregatedTag($tag, $params, $prefix, $file = 'unknown', $line = 0)
{
if ( $this->Application->hasObject('TagsAggregator') ) {
$Method = $tag;
$aggregator = $this->Application->recallObject('TagsAggregator');
/* @var $aggregator kArray */
$tmp = $this->Application->processPrefix($prefix);
$tag_mapping = $aggregator->GetArrayValue($tmp['prefix'], $Method);
if ( $tag_mapping ) {
// aggregated tag defined
$tmp = $this->Application->processPrefix($tag_mapping[0]);
$__tag_processor = $tmp['prefix'] . '_TagProcessor';
$processor = $this->Application->recallObject($__tag_processor);
/* @var $processor kTagProcessor */
$processor->Init($tmp['prefix'], getArrayValue($tag_mapping, 2) ? $tag_mapping[2] : $tmp['special']);
$params['original_tag'] = $Method; // allows to define same method for different aggregated tags in same tag processor
$params['PrefixSpecial'] = $this->getPrefixSpecial(); // $prefix;
$ret = $processor->ProcessParsedTag($tag_mapping[1], $params, $prefix);
if ( isset($params['result_to_var']) ) {
$this->Application->Parser->SetParam($params['result_to_var'], $ret);
$ret = '';
}
return Array ($ret, true);
}
else {
// aggregated tag not defined
$error_tag = Array ('file' => $file, 'line' => $line);
throw new ParserException('Undefined aggregated tag <strong>' . $prefix . ':' . $Method . '</strong> (in ' . get_class($this) . ' tag processor)', 0, null, $error_tag);
}
}
return Array ('', false);
}
function PreparePostProcess(&$params)
{
$flags = Array('js_escape', 'equals_to', 'result_to_var', 'pass_params', 'html_escape', 'strip_nl', 'trim', 'cache_timeout');
$flag_values = Array();
foreach ($flags as $flag_name) {
$flag_values[$flag_name] = false;
if (isset($params[$flag_name])) {
$flag_values[$flag_name] = $params[$flag_name];
unset($params[$flag_name]);
}
}
return $flag_values;
}
function PostProcess($ret, $flag_values)
{
if ($flag_values['html_escape']) {
$ret = htmlspecialchars($ret, null, CHARSET);
}
if ($flag_values['js_escape']) {
$ret = addslashes($ret);
$ret = str_replace(Array("\r", "\n"), Array('\r', '\n'), $ret);
$ret = str_replace('</script>', "</'+'script>", $ret);
}
if ($flag_values['strip_nl']) {
// 1 - strip \r,\n; 2 - strip tabs too
$ret = preg_replace($flag_values['strip_nl'] == 2 ? "/[\r\n\t]/" : "/[\r\n]/", '', $ret);
}
if ($flag_values['trim']) {
$ret = trim($ret);
}
// TODO: in new parser implement this parameter in compiled code (by Alex)
if ($flag_values['equals_to'] !== false) {
$equals_to = explode('|', $flag_values['equals_to']);
$ret = in_array($ret, $equals_to);
}
if ($flag_values['result_to_var']) {
$this->Application->Parser->SetParam($flag_values['result_to_var'], $ret);
$ret = '';
}
return $ret;
}
/**
* Not tag, method for parameter
* selection from list in this TagProcessor
*
* @param Array $params
* @param string $possible_names
* @return string|bool
* @access protected
*/
protected function SelectParam($params, $possible_names = null)
{
if ( !isset($possible_names) ) {
// select 1st parameter non-empty parameter value
$possible_names = explode(',', $params['possible_names']);
foreach ($possible_names as $param_name) {
$value = $this->Application->Parser->GetParam($param_name);
$string_value = (string)$value;
if ( ($string_value != '') && ($string_value != '0') ) {
return $value;
}
}
return false;
}
if ( !is_array($possible_names) ) {
$possible_names = explode(',', $possible_names);
}
foreach ($possible_names as $name) {
if ( isset($params[$name]) ) {
return $params[$name];
}
}
return false;
}
/**
* Returns templates path for module, which is gathered from prefix module
*
* @param Array $params
* @return string
* @author Alex
*/
function ModulePath($params)
{
$force_module = getArrayValue($params, 'module');
if ($force_module) {
if ($force_module == '#session#') {
$force_module = preg_replace('/([^:]*):.*/', '\1', $this->Application->RecallVar('module'));
if (!$force_module) $force_module = 'core';
}
else {
$force_module = mb_strtolower($force_module);
}
if ($force_module == 'core') {
$module_folder = 'core';
}
else {
$module_folder = trim( $this->Application->findModule('Name', $force_module, 'Path'), '/');
}
}
else {
$module_folder = $this->Application->getUnitOption($this->Prefix, 'ModuleFolder');
}
return '../../'.$module_folder.'/admin_templates/';
}
}
/*class ProcessorsPool {
var $Processors = Array();
var $Application;
var $Prefixes = Array();
var $S;
function ProcessorsPool()
{
$this->Application =& KernelApplication::Instance();
$this->S =& $this->Application->Session;
}
function RegisterPrefix($prefix, $path, $class)
{
// echo " RegisterPrefix $prefix, $path, $class <br>";
$prefix_item = Array(
'path' => $path,
'class' => $class
);
$this->Prefixes[$prefix] = $prefix_item;
}
function CreateProcessor($prefix, &$tag)
{
// echo " prefix : $prefix <br>";
if (!isset($this->Prefixes[$prefix]))
$this->Application->ApplicationDie ("<b>Filepath and ClassName for prefix $prefix not defined while processing ".htmlspecialchars($tag->GetFullTag(), null, CHARSET)."!</b>");
include_once($this->Prefixes[$prefix]['path']);
$ClassName = $this->Prefixes[$prefix]['class'];
$a_processor = new $ClassName($prefix);
$this->SetProcessor($prefix, $a_processor);
}
function SetProcessor($prefix, &$a_processor)
{
$this->Processors[$prefix] =& $a_processor;
}
function &GetProcessor($prefix, &$tag)
{
if (!isset($this->Processors[$prefix]))
$this->CreateProcessor($prefix, $tag);
return $this->Processors[$prefix];
}
}*/

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