library/smarty/libs/sysplugins/smarty_template_config.php
author Markus Broeker<broeker.markus@googlemail.com>
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<?php
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/**
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 * Smarty Config Source Plugin
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 *
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 * @package    Smarty
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 * @subpackage TemplateResources
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 * @author     Uwe Tews
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 */
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/**
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 * Smarty Connfig Resource Data Object
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 * Meta Data Container for Template Files
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 *
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 * @package    Smarty
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 * @subpackage TemplateResources
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 * @author     Uwe Tews
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 * @property integer $timestamp Source Timestamp
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 * @property boolean $exists    Source Existence
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 * @property boolean $template  Extended Template reference
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 * @property string $content   Source Content
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 */
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class Smarty_Template_Config extends Smarty_Template_Source {
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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_Config_File_Compiler';
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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_Configfilelexer';
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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_Configfileparser';
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    /**
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     * array of section names, single section or null
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     *
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     * @var null|string|array
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     */
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    public $config_sections = null;
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    /**
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     * scope into which the config variables shall be loaded
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     *
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     * @var string
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     */
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    public $scope = 'local';
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    /**
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     * Flag that source is a config file
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     *
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     * @var bool
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     */
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    public $isConfig = true;
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    /**
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     * create Source Object container
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     *
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     * @param Smarty_Resource $handler Resource Handler this source object communicates with
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     * @param Smarty $smarty Smarty instance this source object belongs to
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     * @param string $resource full template_resource
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     * @param string $type type of resource
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     * @param string $name resource name
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     */
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    public function __construct(Smarty_Resource $handler, Smarty $smarty, $resource, $type, $name) {
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        $this->handler = clone $handler; // Note: prone to circular references
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        $this->resource = $resource;
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        $this->type = $type;
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        $this->name = $name;
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        $this->smarty = $smarty;
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    }
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    /**
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     * initialize Source Object for given resource
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     * Either [$_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 load(Smarty_Internal_Template $_template = null, Smarty $smarty = null, $template_resource = null) {
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        static $_incompatible_resources = array('extends' => true, 'php' => true);
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        $smarty = $_template->smarty;
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        $template_resource = $_template->template_resource;
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        if (empty($template_resource)) {
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            throw new SmartyException('Missing config name');
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        }
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        // parse resource_name, load resource handler
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        list($name, $type) = Smarty_Resource::parseResourceName($template_resource, $smarty->default_config_type);
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        // make sure configs are not loaded via anything smarty can't handle
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        if (isset($_incompatible_resources[$type])) {
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            throw new SmartyException ("Unable to use resource '{$type}' for config");
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        }
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        $resource = Smarty_Resource::load($smarty, $type);
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        $source = new Smarty_Template_Config($resource, $smarty, $template_resource, $type, $name);
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        $resource->populate($source, $_template);
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        if ((!isset($source->exists) || !$source->exists) && isset($_template->smarty->default_config_handler_func)) {
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            Smarty_Internal_Extension_DefaultTemplateHandler::_getDefault($_template, $source, $resource);
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        }
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        $source->unique_resource = $resource->buildUniqueResourceName($smarty, $name, true);
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        return $source;
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    }
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}