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