file_aliases.module in File Aliases 7

Contains core functions for the File Aliases module.

File

file_aliases.module

<?php

/**
 * @file
 * Contains core functions for the File Aliases module.
 */

/**
 * Include additional files.
 */
$dirname = dirname(__FILE__) . "/modules";
$includes = file_scan_directory($dirname, '/.inc$/');
foreach (module_list() as $module) {
  if (isset($includes[$file = "{$dirname}/{$module}.inc"])) {
    require_once $file;
  }
}

/**
 * Implements hook_menu().
 *
 * @return mixed
 */
function file_aliases_menu() {
  $items['file_aliases/%'] = array(
    'page callback' => 'file_aliases_load_fid',
    'page arguments' => array(
      1,
    ),
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );
  return $items;
}

/**
 * Implements hook_preprocess_image_style().
 *
 * @param $variables
 */
function file_aliases_preprocess_image_style(&$variables) {
  global $base_url;
  $source = drupal_lookup_path('source', str_replace($base_url . base_path(), '', $variables['path']));
  if ($source !== FALSE) {
    $fid = drupal_substr($source, 13);
    $uri = db_select('file_managed', 'f')
      ->fields('f', array(
      'uri',
    ))
      ->condition('fid', $fid)
      ->execute()
      ->fetchField();
    if ($uri) {
      $variables['path'] = $uri;
    }
  }
}

/**
 * Implements hook_preprocess_image().
 *
 * @param $variables
 */
function file_aliases_preprocess_image(&$variables) {
  if (isset($variables['style_name'])) {
    $regex = ".*?files\\/styles\\/{$variables['style_name']}\\/(.*?)\\/(.*)";
    if (defined('IMAGE_DERIVATIVE_TOKEN')) {
      $regex .= '\\?(' . IMAGE_DERIVATIVE_TOKEN . '=\\S{8})';
    }
    if (preg_match("/{$regex}/", $variables['path'], $matches)) {
      $fid = db_select('file_managed', 'f')
        ->fields('f', array(
        'fid',
      ))
        ->condition('uri', "{$matches[1]}://{$matches[2]}")
        ->execute()
        ->fetchField();
      if ($fid) {
        $source = "file_aliases/{$fid}";
        if (($alias = drupal_get_path_alias($source)) != $source) {
          $variables['path'] = file_create_url($alias) . "?{$variables['style_name']}";
          if (defined('IMAGE_DERIVATIVE_TOKEN')) {
            $variables['path'] .= "&{$matches[3]}";
          }
        }
      }
    }
  }
}

/**
 * Implements hook_file_url_alter().
 *
 * @param $uri
 */
function file_aliases_file_url_alter(&$uri) {
  $fid = db_select('file_managed', 'f')
    ->fields('f', array(
    'fid',
  ))
    ->condition('uri', $uri)
    ->execute()
    ->fetchField();
  if ($fid) {
    $source = "file_aliases/{$fid}";
    if (($alias = drupal_get_path_alias($source)) != $source) {
      $uri = url($alias, array(
        'absolute' => TRUE,
      ));
    }
  }
}

/**
 * Menu callback; File Alias callback.
 *
 * @param $fid
 */
function file_aliases_load_fid($fid) {
  if (request_uri() == base_path() . "file_aliases/{$fid}") {
    drupal_not_found();
    exit;
  }

  /** @var DatabaseStatementBase $query */
  $query = db_select('file_managed', 'f')
    ->fields('f', array(
    'filemime',
    'filesize',
    'uri',
  ))
    ->condition('fid', $fid)
    ->execute();
  $results = $query
    ->fetchAll();
  $result = current($results);
  if (!$result) {
    return;
  }

  // Render Image Style preset if applicable.
  $uri = explode('?', request_uri());
  if (isset($uri[1]) && strpos($result->filemime, 'image') === 0) {
    if (defined('IMAGE_DERIVATIVE_TOKEN')) {
      list($uri[1], ) = explode('&', $uri[1]);
    }
    $image_style = $uri[1];
    $styles = image_styles();
    if (isset($styles[$image_style])) {
      $arguments = array_merge(array(
        image_style_load($image_style),
        file_uri_scheme($result->uri),
      ), explode('/', str_replace(file_uri_scheme($result->uri) . '://', '', $result->uri)));
      call_user_func_array('image_style_deliver', $arguments);
    }
  }
  if (!$result || !is_object($result)) {
    return;
  }
  elseif (file_uri_scheme($result->uri) == 'private') {
    $file = explode('://', $result->uri);
    file_download($file[0], $file[1]);
  }
  else {
    drupal_add_http_header('Cache-Control', 'public');
    drupal_add_http_header('Content-Length', $result->filesize);
    drupal_add_http_header('Content-Type', $result->filemime);
    readfile($result->uri);
  }
}

/**
 * Implements hook_file_download().
 *
 * @param $uri
 * @return array
 */
function file_aliases_file_download($uri) {
  $file = drupal_realpath($uri);
  $file_alias = drupal_get_path_alias($_GET['q']);
  $fileinfo = pathinfo($file_alias);
  return array(
    'Cache-Control' => 'public',
    'Content-Disposition' => "filename='{$fileinfo['basename']}'",
    'Content-Length' => filesize($file),
    'Content-Type' => mime_content_type($file),
  );
}

/**
 * Implements hook_file_delete().
 *
 * @param $file
 */
function file_aliases_file_delete($file) {
  $alias = "file_aliases/{$file->fid}";
  if (drupal_get_path_alias($alias)) {
    $path = path_load($alias);
    path_delete($path['pid']);
  }
}

Functions

Name	Description
file_aliases_file_delete	Implements hook_file_delete().
file_aliases_file_download	Implements hook_file_download().
file_aliases_file_url_alter	Implements hook_file_url_alter().
file_aliases_load_fid	Menu callback; File Alias callback.
file_aliases_menu	Implements hook_menu().
file_aliases_preprocess_image	Implements hook_preprocess_image().
file_aliases_preprocess_image_style	Implements hook_preprocess_image_style().