text: <?php
  
  /*
   * This file is part of the Symfony package.
   *
   * (c) Fabien Potencier <fabien@symfony.com>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */
  
  namespace Symfony\Component\DomCrawler\Field;
  
  /**
   * FileFormField represents a file form field (an HTML file input tag).
   *
   * @author Fabien Potencier <fabien@symfony.com>
   */
  class FileFormField extends FormField
  {
      /**
       * Sets the PHP error code associated with the field.
       *
       * @param int $error The error code (one of UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_CANT_WRITE, or UPLOAD_ERR_EXTENSION)
       *
       * @throws \InvalidArgumentException When error code doesn't exist
       */
      public function setErrorCode($error)
      {
          $codes = array(UPLOAD_ERR_INI_SIZE, UPLOAD_ERR_FORM_SIZE, UPLOAD_ERR_PARTIAL, UPLOAD_ERR_NO_FILE, UPLOAD_ERR_NO_TMP_DIR, UPLOAD_ERR_CANT_WRITE, UPLOAD_ERR_EXTENSION);
          if (!in_array($error, $codes)) {
              throw new \InvalidArgumentException(sprintf('The error code %s is not valid.', $error));
          }
  
          $this->value = array('name' => '', 'type' => '', 'tmp_name' => '', 'error' => $error, 'size' => 0);
      }
  
      /**
       * Sets the value of the field.
       *
       * @param string $value The value of the field
       */
      public function upload($value)
      {
          $this->setValue($value);
      }
  
      /**
       * Sets the value of the field.
       *
       * @param string $value The value of the field
       */
      public function setValue($value)
      {
          if (null !== $value && is_readable($value)) {
              $error = UPLOAD_ERR_OK;
              $size = filesize($value);
              $info = pathinfo($value);
              $name = $info['basename'];
  
              // copy to a tmp location
              $tmp = sys_get_temp_dir().'/'.sha1(uniqid(mt_rand(), true));
              if (array_key_exists('extension', $info)) {
                  $tmp .= '.'.$info['extension'];
              }
              if (is_file($tmp)) {
                  unlink($tmp);
              }
              copy($value, $tmp);
              $value = $tmp;
          } else {
              $error = UPLOAD_ERR_NO_FILE;
              $size = 0;
              $name = '';
              $value = '';
          }
  
          $this->value = array('name' => $name, 'type' => '', 'tmp_name' => $value, 'error' => $error, 'size' => $size);
      }
  
      /**
       * Sets path to the file as string for simulating HTTP request.
       *
       * @param string $path The path to the file
       */
      public function setFilePath($path)
      {
          parent::setValue($path);
      }
  
      /**
       * Initializes the form field.
       *
       * @throws \LogicException When node type is incorrect
       */
      protected function initialize()
      {
          if ('input' !== $this->node->nodeName) {
              throw new \LogicException(sprintf('A FileFormField can only be created from an input tag (%s given).', $this->node->nodeName));
          }
  
          if ('file' !== strtolower($this->node->getAttribute('type'))) {
              throw new \LogicException(sprintf('A FileFormField can only be created from an input tag with a type of file (given type is %s).', $this->node->getAttribute('type')));
          }
  
          $this->setValue(null);
      }
  }
  