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<?php
/**
* Smarty Extension Loadplugin
*
* $smarty->loadPlugin() method
*
* @package Smarty
* @subpackage PluginsInternal
* @author Uwe Tews
*/
class Smarty_Internal_Method_LoadPlugin
{
/**
* Cache of searched plugin files
*
* @var array
*/
public $plugin_files = array();
/**
* Takes unknown classes and loads plugin files for them
* class name format: Smarty_PluginType_PluginName
* plugin filename format: plugintype.pluginname.php
*
* @param \Smarty $smarty
* @param string $plugin_name class plugin name to load
* @param bool $check check if already loaded
*
* @return bool|string
* @throws \SmartyException
*/
public function loadPlugin(Smarty $smarty, $plugin_name, $check)
{
// if function or class exists, exit silently (already loaded)
if ($check && (is_callable($plugin_name) || class_exists($plugin_name, false))) {
return true;
}
if (!preg_match('#^smarty_((internal)|([^_]+))_(.+)$#i', $plugin_name, $match)) {
throw new SmartyException("plugin {$plugin_name} is not a valid name format");
}
if (!empty($match[2])) {
$file = SMARTY_SYSPLUGINS_DIR . strtolower($plugin_name) . '.php';
if (isset($this->plugin_files[$file])) {
if ($this->plugin_files[$file] !== false) {
return $this->plugin_files[$file];
} else {
return false;
}
} else {
if (is_file($file)) {
$this->plugin_files[$file] = $file;
require_once($file);
return $file;
} else {
$this->plugin_files[$file] = false;
return false;
}
}
}
// plugin filename is expected to be: [type].[name].php
$_plugin_filename = "{$match[1]}.{$match[4]}.php";
$_lower_filename = strtolower($_plugin_filename);
if (isset($this->plugin_files)) {
if (isset($this->plugin_files['plugins_dir'][$_lower_filename])) {
if (!$smarty->use_include_path || $this->plugin_files['plugins_dir'][$_lower_filename] !== false) {
return $this->plugin_files['plugins_dir'][$_lower_filename];
}
}
if (!$smarty->use_include_path || $smarty->ext->_getIncludePath->isNewIncludePath($smarty)) {
unset($this->plugin_files['include_path']);
} else {
if (isset($this->plugin_files['include_path'][$_lower_filename])) {
return $this->plugin_files['include_path'][$_lower_filename];
}
}
}
$_file_names = array($_plugin_filename);
if ($_lower_filename != $_plugin_filename) {
$_file_names[] = $_lower_filename;
}
$_p_dirs = $smarty->getPluginsDir();
if (!isset($this->plugin_files['plugins_dir'][$_lower_filename])) {
// loop through plugin dirs and find the plugin
foreach ($_p_dirs as $_plugin_dir) {
foreach ($_file_names as $name) {
$file = $_plugin_dir . $name;
if (is_file($file)) {
$this->plugin_files['plugins_dir'][$_lower_filename] = $file;
require_once($file);
return $file;
}
$this->plugin_files['plugins_dir'][$_lower_filename] = false;
}
}
}
if ($smarty->use_include_path) {
foreach ($_file_names as $_file_name) {
// try PHP include_path
$file = $smarty->ext->_getIncludePath->getIncludePath($_p_dirs, $_file_name, $smarty);
$this->plugin_files['include_path'][$_lower_filename] = $file;
if ($file !== false) {
require_once($file);
return $file;
}
}
}
// no plugin loaded
return false;
}
}
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