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253 lines
9.4 KiB
253 lines
9.4 KiB
7 years ago
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<?php
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/**
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* Smarty Resource Plugin
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*
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* @package Smarty
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* @subpackage TemplateResources
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* @author Rodney Rehm
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*/
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/**
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* Smarty Resource Plugin
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* Base implementation for resource plugins
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*
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* @package Smarty
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* @subpackage TemplateResources
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*
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* @method renderUncompiled(Smarty_Template_Source $source, Smarty_Internal_Template $_template)
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* @method populateCompiledFilepath(Smarty_Template_Compiled $compiled, Smarty_Internal_Template $_template)
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* @method process(Smarty_Internal_Template $_smarty_tpl)
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*/
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abstract class Smarty_Resource
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{
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/**
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* resource types provided by the core
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*
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* @var array
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*/
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public static $sysplugins = array('file' => 'smarty_internal_resource_file.php',
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'string' => 'smarty_internal_resource_string.php',
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'extends' => 'smarty_internal_resource_extends.php',
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'stream' => 'smarty_internal_resource_stream.php',
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'eval' => 'smarty_internal_resource_eval.php',
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'php' => 'smarty_internal_resource_php.php');
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/**
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* Source is bypassing compiler
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*
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* @var boolean
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*/
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public $uncompiled = false;
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/**
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* Source must be recompiled on every occasion
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*
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* @var boolean
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*/
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public $recompiled = false;
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/**
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* Flag if resource does implement populateCompiledFilepath() method
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*
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* @var bool
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*/
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public $hasCompiledHandler = false;
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/**
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* Load Resource Handler
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*
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* @param Smarty $smarty smarty object
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* @param string $type name of the resource
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*
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* @throws SmartyException
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* @return Smarty_Resource Resource Handler
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*/
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public static function load(Smarty $smarty, $type)
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{
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// try smarty's cache
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if (isset($smarty->_cache[ 'resource_handlers' ][ $type ])) {
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return $smarty->_cache[ 'resource_handlers' ][ $type ];
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}
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// try registered resource
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if (isset($smarty->registered_resources[ $type ])) {
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return $smarty->_cache[ 'resource_handlers' ][ $type ] =
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$smarty->registered_resources[ $type ] instanceof Smarty_Resource ?
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$smarty->registered_resources[ $type ] : new Smarty_Internal_Resource_Registered();
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}
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// try sysplugins dir
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if (isset(self::$sysplugins[ $type ])) {
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$_resource_class = 'Smarty_Internal_Resource_' . ucfirst($type);
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return $smarty->_cache[ 'resource_handlers' ][ $type ] = new $_resource_class();
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}
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// try plugins dir
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$_resource_class = 'Smarty_Resource_' . ucfirst($type);
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if ($smarty->loadPlugin($_resource_class)) {
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if (class_exists($_resource_class, false)) {
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return $smarty->_cache[ 'resource_handlers' ][ $type ] = new $_resource_class();
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} else {
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$smarty->registerResource($type,
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array("smarty_resource_{$type}_source", "smarty_resource_{$type}_timestamp",
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"smarty_resource_{$type}_secure", "smarty_resource_{$type}_trusted"));
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// give it another try, now that the resource is registered properly
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return self::load($smarty, $type);
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}
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}
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// try streams
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$_known_stream = stream_get_wrappers();
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if (in_array($type, $_known_stream)) {
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// is known stream
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if (is_object($smarty->security_policy)) {
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$smarty->security_policy->isTrustedStream($type);
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}
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return $smarty->_cache[ 'resource_handlers' ][ $type ] = new Smarty_Internal_Resource_Stream();
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}
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// TODO: try default_(template|config)_handler
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// give up
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throw new SmartyException("Unknown resource type '{$type}'");
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}
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/**
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* extract resource_type and resource_name from template_resource and config_resource
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* @note "C:/foo.tpl" was forced to file resource up till Smarty 3.1.3 (including).
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*
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* @param string $resource_name template_resource or config_resource to parse
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* @param string $default_resource the default resource_type defined in $smarty
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*
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* @return array with parsed resource name and type
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*/
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public static function parseResourceName($resource_name, $default_resource)
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{
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if (preg_match('/^([A-Za-z0-9_\-]{2,})[:]/', $resource_name, $match)) {
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$type = $match[ 1 ];
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$name = substr($resource_name, strlen($match[ 0 ]));
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} else {
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// no resource given, use default
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// or single character before the colon is not a resource type, but part of the filepath
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$type = $default_resource;
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$name = $resource_name;
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}
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return array($name, $type);
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}
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/**
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* modify template_resource according to resource handlers specifications
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*
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* @param \Smarty_Internal_Template|\Smarty $obj Smarty instance
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* @param string $template_resource template_resource to extract resource handler and name of
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*
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* @return string unique resource name
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* @throws \SmartyException
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*/
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public static function getUniqueTemplateName($obj, $template_resource)
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{
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$smarty = $obj->_getSmartyObj();
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list($name, $type) = self::parseResourceName($template_resource, $smarty->default_resource_type);
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// TODO: optimize for Smarty's internal resource types
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$resource = Smarty_Resource::load($smarty, $type);
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// go relative to a given template?
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$_file_is_dotted = $name[ 0 ] === '.' && ($name[ 1 ] === '.' || $name[ 1 ] === '/');
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if ($obj->_isTplObj() && $_file_is_dotted &&
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($obj->source->type === 'file' || $obj->parent->source->type === 'extends')
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) {
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$name = $smarty->_realpath(dirname($obj->parent->source->filepath) . DIRECTORY_SEPARATOR . $name);
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}
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return $resource->buildUniqueResourceName($smarty, $name);
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}
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/**
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* initialize Source Object for given resource
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* wrapper for backward compatibility to versions < 3.1.22
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* Either [$_template] or [$smarty, $template_resource] must be specified
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*
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* @param Smarty_Internal_Template $_template template object
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* @param Smarty $smarty smarty object
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* @param string $template_resource resource identifier
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*
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* @return \Smarty_Template_Source Source Object
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* @throws \SmartyException
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*/
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public static function source(Smarty_Internal_Template $_template = null,
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Smarty $smarty = null,
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$template_resource = null)
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{
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return Smarty_Template_Source::load($_template, $smarty, $template_resource);
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}
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/**
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* Load template's source into current template object
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*
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* @param Smarty_Template_Source $source source object
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*
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* @return string template source
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* @throws SmartyException if source cannot be loaded
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*/
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abstract public function getContent(Smarty_Template_Source $source);
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/**
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* populate Source Object with meta data from Resource
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*
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* @param Smarty_Template_Source $source source object
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* @param Smarty_Internal_Template $_template template object
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*/
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abstract public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null);
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/**
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* populate Source Object with timestamp and exists from Resource
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*
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* @param Smarty_Template_Source $source source object
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*/
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public function populateTimestamp(Smarty_Template_Source $source)
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{
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// intentionally left blank
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}
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/**
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* modify resource_name according to resource handlers specifications
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*
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* @param Smarty $smarty Smarty instance
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* @param string $resource_name resource_name to make unique
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* @param boolean $isConfig flag for config resource
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*
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* @return string unique resource name
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*/
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public function buildUniqueResourceName(Smarty $smarty, $resource_name, $isConfig = false)
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{
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if ($isConfig) {
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if (!isset($smarty->_joined_config_dir)) {
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$smarty->getTemplateDir(null, true);
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}
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return get_class($this) . '#' . $smarty->_joined_config_dir . '#' . $resource_name;
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} else {
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if (!isset($smarty->_joined_template_dir)) {
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$smarty->getTemplateDir();
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}
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return get_class($this) . '#' . $smarty->_joined_template_dir . '#' . $resource_name;
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}
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}
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/*
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* Check if resource must check time stamps when when loading complied or cached templates.
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* Resources like 'extends' which use source components my disable timestamp checks on own resource.
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*
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* @return bool
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*/
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/**
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* Determine basename for compiled filename
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*
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* @param Smarty_Template_Source $source source object
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*
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* @return string resource's basename
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*/
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public function getBasename(Smarty_Template_Source $source)
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{
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return basename(preg_replace('![^\w]+!', '_', $source->name));
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}
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/**
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* @return bool
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*/
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public function checkTimestamps()
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{
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return true;
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}
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}
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