1: <?php
  2: 
  3: /**
  4:  * This file is part of the Latte (https://latte.nette.org)
  5:  * Copyright (c) 2008 David Grudl (https://davidgrudl.com)
  6:  */
  7: 
  8: namespace Latte\Loaders;
  9: 
 10: use Latte;
 11: 
 12: 
 13: /**
 14:  * Template loader.
 15:  */
 16: class FileLoader implements Latte\ILoader
 17: {
 18:     use Latte\Strict;
 19: 
 20:     /** @var string|null */
 21:     private $baseDir;
 22: 
 23: 
 24:     public function __construct($baseDir = null)
 25:     {
 26:         $this->baseDir = $baseDir ? $this->normalizePath("$baseDir/") : null;
 27:     }
 28: 
 29: 
 30:     /**
 31:      * Returns template source code.
 32:      * @return string
 33:      */
 34:     public function getContent($fileName)
 35:     {
 36:         $file = $this->baseDir . $fileName;
 37:         if ($this->baseDir && !Latte\Helpers::startsWith($this->normalizePath($file), $this->baseDir)) {
 38:             throw new \RuntimeException("Template '$file' is not within the allowed path '$this->baseDir'.");
 39: 
 40:         } elseif (!is_file($file)) {
 41:             throw new \RuntimeException("Missing template file '$file'.");
 42: 
 43:         } elseif ($this->isExpired($fileName, time())) {
 44:             if (@touch($file) === false) {
 45:                 trigger_error("File's modification time is in the future. Cannot update it: " . error_get_last()['message'], E_USER_WARNING);
 46:             }
 47:         }
 48:         return file_get_contents($file);
 49:     }
 50: 
 51: 
 52:     /**
 53:      * @return bool
 54:      */
 55:     public function isExpired($file, $time)
 56:     {
 57:         return @filemtime($this->baseDir . $file) > $time; // @ - stat may fail
 58:     }
 59: 
 60: 
 61:     /**
 62:      * Returns referred template name.
 63:      * @return string
 64:      */
 65:     public function getReferredName($file, $referringFile)
 66:     {
 67:         if ($this->baseDir || !preg_match('#/|\\\\|[a-z][a-z0-9+.-]*:#iA', $file)) {
 68:             $file = $this->normalizePath($referringFile . '/../' . $file);
 69:         }
 70:         return $file;
 71:     }
 72: 
 73: 
 74:     /**
 75:      * Returns unique identifier for caching.
 76:      * @return string
 77:      */
 78:     public function getUniqueId($file)
 79:     {
 80:         return $this->baseDir . strtr($file, '/', DIRECTORY_SEPARATOR);
 81:     }
 82: 
 83: 
 84:     /**
 85:      * @return string
 86:      */
 87:     private static function normalizePath($path)
 88:     {
 89:         $res = [];
 90:         foreach (explode('/', strtr($path, '\\', '/')) as $part) {
 91:             if ($part === '..' && $res && end($res) !== '..') {
 92:                 array_pop($res);
 93:             } elseif ($part !== '.') {
 94:                 $res[] = $part;
 95:             }
 96:         }
 97:         return implode(DIRECTORY_SEPARATOR, $res);
 98:     }
 99: }
100: