class TempFileAdapter in Backup and Migrate 5.0.x

A very basic temp file manager.

Assumes read/write access to a local temp directory.

Hierarchy

• class \Drupal\backup_migrate\Core\File\TempFileAdapter implements TempFileAdapterInterface

1 file declares its use of TempFileAdapter

DrupalTempFileAdapter.php in src/Drupal/File/DrupalTempFileAdapter.php

1 string reference to 'TempFileAdapter'

backup_migrate_backup_migrate_service_object_alter in ./backup_migrate.module

Implements hook_backup_migrate_service_object_alter().

File

src/Core/File/TempFileAdapter.php, line 12

Namespace

Drupal\backup_migrate\Core\File

class TempFileAdapter implements TempFileAdapterInterface {

  /**
   * The path to the temp directory.
   *
   * @var string
   */
  protected $dir;

  /**
   * A prefix to add to all temp files.
   *
   * @var string
   */
  protected $prefix;

  /**
   * The list of files created by this manager.
   *
   * @var array
   */
  protected $tempfiles;

  /**
   * Construct a manager.
   *
   * @param string $dir
   *   A file path or stream URL for the temp directory.
   * @param string $prefix
   *   A string prefix to add to each created file.
   */
  public function __construct($dir, $prefix = 'bam') {

    // Add a trailing slash if needed.
    if (substr($dir, -1) !== '/') {
      $dir .= '/';
    }
    $this->dir = $dir;
    $this->prefix = $prefix;
    $this->tempfiles = [];

    // @todo check that temp directory is writeable or throw an exception.
  }

  /**
   * Destruct the manager.
   *
   * Delete all the temporary files when this manager is destroyed.
   */
  public function __destruct() {
    $this
      ->deleteAllTempFiles();
  }

  /**
   * {@inheritdoc}
   */
  public function createTempFile($ext = '') {

    // Add a dot to the file extension.
    $ext = $ext ? '.' . $ext : '';

    // Find an unused random file name.
    $try = 5;
    do {
      $out = $this->dir . $this->prefix . mt_rand() . $ext;
      $fp = @fopen($out, 'x');
    } while (!$fp && $try-- > 0);
    if ($fp) {
      fclose($fp);
    }
    else {
      throw new \Exception('Could not create a temporary file to write to.');
    }
    $this->tempfiles[] = $out;
    return $out;
  }

  /**
   * {@inheritdoc}
   */
  public function deleteTempFile($filename) {

    // Only delete files that were created by this manager.
    if (in_array($filename, $this->tempfiles)) {
      if (file_exists($filename)) {
        if (is_writable($filename)) {
          unlink($filename);
        }
        else {
          throw new BackupMigrateException('Could not delete the temp file: %file because it is not writable', [
            '%file' => $filename,
          ]);
        }
      }

      // Remove the item from the list.
      $this->tempfiles = array_diff($this->tempfiles, [
        $filename,
      ]);
      return;
    }
    throw new BackupMigrateException('Attempting to delete a temp file not managed by this codebase: %file', [
      '%file' => $filename,
    ]);
  }

  /**
   * {@inheritdoc}
   */
  public function deleteAllTempFiles() {
    foreach ($this->tempfiles as $file) {
      $this
        ->deleteTempFile($file);
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
TempFileAdapter::$dir	protected	property	The path to the temp directory.
TempFileAdapter::$prefix	protected	property	A prefix to add to all temp files.
TempFileAdapter::$tempfiles	protected	property	The list of files created by this manager.
TempFileAdapter::createTempFile	public	function	Get a temporary file that can be written to. Overrides TempFileAdapterInterface::createTempFile	1
TempFileAdapter::deleteAllTempFiles	public	function	Delete all temp files which have been created. Overrides TempFileAdapterInterface::deleteAllTempFiles
TempFileAdapter::deleteTempFile	public	function	Delete a temporary file. Overrides TempFileAdapterInterface::deleteTempFile	1
TempFileAdapter::__construct	public	function	Construct a manager.	1
TempFileAdapter::__destruct	public	function	Destruct the manager.