<?php

/**

 * Smarty Internal Plugin Resource File

 *

 * @package    Smarty

 * @subpackage TemplateResources

 * @author     Uwe Tews

 * @author     Rodney Rehm

 */

/**

 * Smarty Internal Plugin Resource File

 * Implements the file system as resource for Smarty templates

 *

 * @package    Smarty

 * @subpackage TemplateResources

 */

class Smarty_Internal_Resource_File extends Smarty_Resource {

    /**

     * build template filepath by traversing the template_dir array

     *

     * @param Smarty_Template_Source $source source object

     * @param  Smarty_Internal_Template $_template template object

     *

     * @return string fully qualified filepath

     * @throws SmartyException

     */

    protected function buildFilepath(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {

        $file = $source->name;

        preg_match('#^(?P<absolute>[\\\/]|[a-zA-Z]:[\\\/])|(\[(?P<index>[^\]]+)\])|(?P<rel>\.[\\\/])#', $file, $fileMatch);

        // save basename

        if (!empty($fileMatch['absolute'])) {

            $file = $this->normalizePath($file);

            return is_file($file) ? $file : false;

        }

        // go relative to a given template?

        if (!empty($fileMatch['rel']) && $_template && $_template->parent instanceof Smarty_Internal_Template) {

            if ($_template->parent->source->type != 'file' && $_template->parent->source->type != 'extends' && !$_template->parent->allow_relative_path) {

                throw new SmartyException("Template '{$file}' cannot be relative to template of resource type '{$_template->parent->source->type}'");

            }

            $path = dirname($_template->parent->source->filepath) . DS . $file;

            // normalize path

            $path = $this->normalizePath($path);

            // files relative to a template only get one shot

            return is_file($path) ? $path : false;

        }

        if ($source->isConfig) {

            $_directories = $source->smarty->getConfigDir();

        } else {

            $_directories = $source->smarty->getTemplateDir();

        }

        // template_dir index?

        if (!empty($fileMatch['index'])) {

            $index = $fileMatch['index'];

            $_directory = null;

            // try string indexes

            if (isset($_directories[$index])) {

                $_directory = $_directories[$index];

            } elseif (is_numeric($index)) {

                // try numeric index

                $index = (int)$index;

                if (isset($_directories[$index])) {

                    $_directory = $_directories[$index];

                } else {

                    // try at location index

                    $keys = array_keys($_directories);

                    $_directory = $_directories[$keys[$index]];

                }

            }

            if ($_directory) {

                preg_match('#\](.+)$#', $file, $fileMatch);

                $path = $_directory . $fileMatch[1];

                $path = $this->normalizePath($path);

                if (is_file($path)) {

                    return $path;

                }

            } else {

                // index not found

                return false;

            }

        }

        // relative file name?

        foreach ($_directories as $_directory) {

            $_filepath = $_directory . $file;

            $path = $this->normalizePath($_filepath);

            if (is_file($path)) {

                return $path;

            }

            if ($source->smarty->use_include_path && !preg_match('/^([\/\\\\]|[a-zA-Z]:[\/\\\\])/', $_directory)) {

                // try PHP include_path

                if (function_exists('stream_resolve_include_path')) {

                    $_filepath = stream_resolve_include_path($_filepath);

                } else {

                    $_filepath = Smarty_Internal_Get_Include_Path::getIncludePath($_filepath);

                }

                if ($_filepath !== false) {

                    $path = $this->normalizePath($_filepath);

                    if (is_file($path)) {

                        return $path;

                    }

                }

            }

        }

        // Could be relative to cwd

        $path = $this->normalizePath(getcwd() . DS . $file);

        return is_file($path) ? $path : false;

    }

    /**

     * Normalize path

     *  - remove /./ and /../

     *  - make it absolute

     *

     * @param string $path file path

     *

     * @return string

     */

    public function normalizePath($path) {

        if ($path[0] == '.') {

            $path = getcwd() . DS . $path;

        }

        $path = preg_replace('#[\\\/]+([.][\\\/]+)*#', DS, $path);

        while (strrpos($path, '.' . DS) !== false) {

            $path = preg_replace('#([\\\/]([^\\\/]+[\\\/]){2}([.][.][\\\/]){2})|([\\\/][^\\\/]+[\\\/][.][.][\\\/])#', DS, $path);

        }

        return $path;

    }

    /**

     * test is file exists and save timestamp

     *

     * @param  Smarty_Template_Source $source source object

     * @param  string $file file name

     *

     * @return bool                   true if file exists

     */

    protected function fileExists(Smarty_Template_Source $source, $file) {

        $source->timestamp = is_file($file) ? @filemtime($file) : false;

        return $source->exists = !!$source->timestamp;

    }

    /**

     * populate Source Object with meta data from Resource

     *

     * @param Smarty_Template_Source $source source object

     * @param Smarty_Internal_Template $_template template object

     */

    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {

        $source->filepath = $this->buildFilepath($source, $_template);

        if ($source->filepath !== false) {

            if (is_object($source->smarty->security_policy)) {

                $source->smarty->security_policy->isTrustedResourceDir($source->filepath);

            }

            $source->exists = true;

            $source->uid = sha1($source->filepath);

            if ($source->smarty->compile_check && !isset($source->timestamp)) {

                $source->timestamp = @filemtime($source->filepath);

            }

        } else {

            $source->timestamp = false;

            $source->exists = false;

        }

    }

    /**

     * populate Source Object with timestamp and exists from Resource

     *

     * @param Smarty_Template_Source $source source object

     */

    public function populateTimestamp(Smarty_Template_Source $source) {

        $source->timestamp = $source->exists = is_file($source->filepath);

        if ($source->exists) {

            $source->timestamp = @filemtime($source->filepath);

        }

    }

    /**

     * Load template's source from file into current template object

     *

     * @param  Smarty_Template_Source $source source object

     *

     * @return string                 template source

     * @throws SmartyException        if source cannot be loaded

     */

    public function getContent(Smarty_Template_Source $source) {

        if ($source->timestamp) {

            return file_get_contents($source->filepath);

        }

        if ($source instanceof Smarty_Config_Source) {

            throw new SmartyException("Unable to read config {$source->type} '{$source->name}'");

        }

        throw new SmartyException("Unable to read template {$source->type} '{$source->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 basename($source->filepath);

    }

}