library/smarty/libs/sysplugins/smarty_internal_resource_file.php
author Markus Broeker<broeker.markus@googlemail.com>
Sun, 14 Feb 2016 21:40:29 +0100
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<?php
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/**
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 * Smarty Internal Plugin Resource File
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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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 * @author     Rodney Rehm
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 */
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/**
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 * Smarty Internal Plugin Resource File
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 * Implements the file system as resource for Smarty templates
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 *
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 * @package    Smarty
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 * @subpackage TemplateResources
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 */
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class Smarty_Internal_Resource_File extends Smarty_Resource {
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    /**
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     * build template filepath by traversing the template_dir array
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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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     * @return string fully qualified filepath
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     * @throws SmartyException
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     */
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    protected function buildFilepath(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
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        $file = $source->name;
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        preg_match('#^(?P<absolute>[\\\/]|[a-zA-Z]:[\\\/])|(\[(?P<index>[^\]]+)\])|(?P<rel>\.[\\\/])#', $file, $fileMatch);
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        // save basename
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        if (!empty($fileMatch['absolute'])) {
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            $file = $this->normalizePath($file);
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            return is_file($file) ? $file : false;
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        }
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        // go relative to a given template?
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        if (!empty($fileMatch['rel']) && $_template && $_template->parent instanceof Smarty_Internal_Template) {
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            if ($_template->parent->source->type != 'file' && $_template->parent->source->type != 'extends' && !$_template->parent->allow_relative_path) {
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                throw new SmartyException("Template '{$file}' cannot be relative to template of resource type '{$_template->parent->source->type}'");
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            }
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            $path = dirname($_template->parent->source->filepath) . DS . $file;
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            // normalize path
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            $path = $this->normalizePath($path);
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            // files relative to a template only get one shot
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            return is_file($path) ? $path : false;
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        }
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        if ($source->isConfig) {
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            $_directories = $source->smarty->getConfigDir();
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        } else {
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            $_directories = $source->smarty->getTemplateDir();
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        }
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        // template_dir index?
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        if (!empty($fileMatch['index'])) {
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            $index = $fileMatch['index'];
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            $_directory = null;
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            // try string indexes
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            if (isset($_directories[$index])) {
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                $_directory = $_directories[$index];
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            } elseif (is_numeric($index)) {
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                // try numeric index
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                $index = (int)$index;
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                if (isset($_directories[$index])) {
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                    $_directory = $_directories[$index];
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                } else {
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                    // try at location index
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                    $keys = array_keys($_directories);
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                    $_directory = $_directories[$keys[$index]];
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                }
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            }
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            if ($_directory) {
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                preg_match('#\](.+)$#', $file, $fileMatch);
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                $path = $_directory . $fileMatch[1];
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                $path = $this->normalizePath($path);
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                if (is_file($path)) {
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                    return $path;
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                }
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            } else {
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                // index not found
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                return false;
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            }
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        }
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        // relative file name?
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        foreach ($_directories as $_directory) {
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            $_filepath = $_directory . $file;
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            $path = $this->normalizePath($_filepath);
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            if (is_file($path)) {
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                return $path;
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            }
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            if ($source->smarty->use_include_path && !preg_match('/^([\/\\\\]|[a-zA-Z]:[\/\\\\])/', $_directory)) {
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                // try PHP include_path
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                if (function_exists('stream_resolve_include_path')) {
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                    $_filepath = stream_resolve_include_path($_filepath);
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                } else {
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                    $_filepath = Smarty_Internal_Get_Include_Path::getIncludePath($_filepath);
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                }
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                if ($_filepath !== false) {
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                    $path = $this->normalizePath($_filepath);
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                    if (is_file($path)) {
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                        return $path;
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                    }
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                }
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            }
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        }
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        // Could be relative to cwd
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        $path = $this->normalizePath(getcwd() . DS . $file);
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        return is_file($path) ? $path : false;
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    }
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    /**
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     * Normalize path
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     *  - remove /./ and /../
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     *  - make it absolute
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     *
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     * @param string $path file path
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     *
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     * @return string
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     */
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    public function normalizePath($path) {
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        if ($path[0] == '.') {
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            $path = getcwd() . DS . $path;
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        }
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        $path = preg_replace('#[\\\/]+([.][\\\/]+)*#', DS, $path);
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        while (strrpos($path, '.' . DS) !== false) {
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            $path = preg_replace('#([\\\/]([^\\\/]+[\\\/]){2}([.][.][\\\/]){2})|([\\\/][^\\\/]+[\\\/][.][.][\\\/])#', DS, $path);
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        }
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        return $path;
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    }
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    /**
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     * test is file exists and save timestamp
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     *
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     * @param  Smarty_Template_Source $source source object
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     * @param  string $file file name
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     *
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     * @return bool                   true if file exists
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     */
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    protected function fileExists(Smarty_Template_Source $source, $file) {
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        $source->timestamp = is_file($file) ? @filemtime($file) : false;
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        return $source->exists = !!$source->timestamp;
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    }
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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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    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
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        $source->filepath = $this->buildFilepath($source, $_template);
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        if ($source->filepath !== false) {
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            if (is_object($source->smarty->security_policy)) {
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                $source->smarty->security_policy->isTrustedResourceDir($source->filepath);
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            }
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            $source->exists = true;
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            $source->uid = sha1($source->filepath);
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            if ($source->smarty->compile_check && !isset($source->timestamp)) {
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                $source->timestamp = @filemtime($source->filepath);
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            }
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        } else {
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            $source->timestamp = false;
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            $source->exists = false;
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        }
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    }
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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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        $source->timestamp = $source->exists = is_file($source->filepath);
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        if ($source->exists) {
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            $source->timestamp = @filemtime($source->filepath);
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        }
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    }
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    /**
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     * Load template's source from file 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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    public function getContent(Smarty_Template_Source $source) {
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        if ($source->timestamp) {
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            return file_get_contents($source->filepath);
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        }
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        if ($source instanceof Smarty_Config_Source) {
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            throw new SmartyException("Unable to read config {$source->type} '{$source->name}'");
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        }
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        throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");
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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 $source) {
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        return basename($source->filepath);
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    }
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}