library/smarty/libs/sysplugins/smarty_resource.php
author Markus Broeker<broeker.markus@googlemail.com>
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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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abstract class Smarty_Resource {
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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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     * resource handler object
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     *
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     * @var Smarty_Resource
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     */
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    public $handler = null;
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    /**
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     * cache for Smarty_Template_Source instances
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     *
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     * @var array
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     */
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    public static $sources = array();
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    /**
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     * cache for Smarty_Template_Compiled instances
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     *
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     * @var array
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     */
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    public static $compileds = array();
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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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    protected static $sysplugins = array(
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        '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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    /**
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     * Name of the Class to compile this resource's contents with
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     *
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     * @var string
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     */
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    public $compiler_class = 'Smarty_Internal_SmartyTemplateCompiler';
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    /**
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     * Name of the Class to tokenize this resource's contents with
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     *
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     * @var string
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     */
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    public $template_lexer_class = 'Smarty_Internal_Templatelexer';
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    /**
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     * Name of the Class to parse this resource's contents with
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     *
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     * @var string
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     */
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    public $template_parser_class = 'Smarty_Internal_Templateparser';
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    /**
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     * Load template's source into current template object
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     * {@internal The loaded source is assigned to $_template->source->content directly.}}
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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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        // 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, $isConfig = false) {
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        if ($isConfig) {
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            return get_class($this) . '#' . $smarty->joined_config_dir . '#' . $resource_name;
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        } else {
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            return get_class($this) . '#' . $smarty->joined_template_dir . '#' . $resource_name;
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        }
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    }
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    /**
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     * 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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        return null;
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    }
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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, $type) {
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        // try smarty's cache
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        if (isset($smarty->_resource_handlers[$type])) {
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            return $smarty->_resource_handlers[$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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            if ($smarty->registered_resources[$type] instanceof Smarty_Resource) {
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                $smarty->_resource_handlers[$type] = $smarty->registered_resources[$type];
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            } else {
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                $smarty->_resource_handlers[$type] = new Smarty_Internal_Resource_Registered();
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            }
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            return $smarty->_resource_handlers[$type];
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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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            if (!class_exists($_resource_class, false)) {
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                require SMARTY_SYSPLUGINS_DIR . self::$sysplugins[$type];
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            }
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            return $smarty->_resource_handlers[$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 $smarty->_resource_handlers[$type] = new $_resource_class();
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            } else {
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                $smarty->registerResource($type, array(
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                    "smarty_resource_{$type}_source",
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                    "smarty_resource_{$type}_timestamp",
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                    "smarty_resource_{$type}_secure",
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                    "smarty_resource_{$type}_trusted"
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                ));
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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 $smarty->_resource_handlers[$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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        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 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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     *
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     * @return string unique resource name
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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 $template Smarty instance
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     * @param  string $template_resource template_resource to extract resource handler and name of
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     *
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     * @return string unique resource name
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     */
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    public static function getUniqueTemplateName($template, $template_resource) {
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        $smarty = isset($template->smarty) ? $template->smarty : $template;
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        list($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] == '.' || $name[1] == '/');
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        if ($template instanceof Smarty_Internal_Template && $_file_is_dotted && ($template->source->type == 'file' || $template->parent->source->type == 'extends')) {
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            $name = dirname($template->source->filepath) . DS . $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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     */
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    public static function source(Smarty_Internal_Template $_template = null, Smarty $smarty = null, $template_resource = null) {
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        return Smarty_Template_Source::load($_template, $smarty, $template_resource);
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   274
    }
4869aea77e21 Bröker-Framework BFW-1
Markus Bröker <broeker.markus@googlemail.com>
parents:
diff changeset
   275
}
4869aea77e21 Bröker-Framework BFW-1
Markus Bröker <broeker.markus@googlemail.com>
parents:
diff changeset
   276