class AliasRepository in Drupal 9

Provides the default path alias lookup operations.

Hierarchy

• class \Drupal\path_alias\AliasRepository implements AliasRepositoryInterface

1 file declares its use of AliasRepository

WorkspacesAliasRepository.php in core/modules/workspaces/src/WorkspacesAliasRepository.php

1 string reference to 'AliasRepository'

path_alias.services.yml in core/modules/path_alias/path_alias.services.yml

core/modules/path_alias/path_alias.services.yml

1 service uses AliasRepository

path_alias.repository in core/modules/path_alias/path_alias.services.yml

Drupal\path_alias\AliasRepository

File

core/modules/path_alias/src/AliasRepository.php, line 12

Namespace

Drupal\path_alias

class AliasRepository implements AliasRepositoryInterface {

  /**
   * The database connection.
   *
   * @var \Drupal\Core\Database\Connection
   */
  protected $connection;

  /**
   * Constructs an AliasRepository object.
   *
   * @param \Drupal\Core\Database\Connection $connection
   *   A database connection for reading and writing path aliases.
   */
  public function __construct(Connection $connection) {
    $this->connection = $connection;
  }

  /**
   * {@inheritdoc}
   */
  public function preloadPathAlias($preloaded, $langcode) {
    $select = $this
      ->getBaseQuery()
      ->fields('base_table', [
      'path',
      'alias',
    ]);
    if (!empty($preloaded)) {
      $conditions = $this->connection
        ->condition('OR');
      foreach ($preloaded as $preloaded_item) {
        $conditions
          ->condition('base_table.path', $this->connection
          ->escapeLike($preloaded_item), 'LIKE');
      }
      $select
        ->condition($conditions);
    }
    $this
      ->addLanguageFallback($select, $langcode);

    // We order by ID ASC so that fetchAllKeyed() returns the most recently
    // created alias for each source. Subsequent queries using fetchField() must
    // use ID DESC to have the same effect.
    $select
      ->orderBy('base_table.id', 'ASC');
    return $select
      ->execute()
      ->fetchAllKeyed();
  }

  /**
   * {@inheritdoc}
   */
  public function lookupBySystemPath($path, $langcode) {

    // See the queries above. Use LIKE for case-insensitive matching.
    $select = $this
      ->getBaseQuery()
      ->fields('base_table', [
      'id',
      'path',
      'alias',
      'langcode',
    ])
      ->condition('base_table.path', $this->connection
      ->escapeLike($path), 'LIKE');
    $this
      ->addLanguageFallback($select, $langcode);
    $select
      ->orderBy('base_table.id', 'DESC');
    return $select
      ->execute()
      ->fetchAssoc() ?: NULL;
  }

  /**
   * {@inheritdoc}
   */
  public function lookupByAlias($alias, $langcode) {

    // See the queries above. Use LIKE for case-insensitive matching.
    $select = $this
      ->getBaseQuery()
      ->fields('base_table', [
      'id',
      'path',
      'alias',
      'langcode',
    ])
      ->condition('base_table.alias', $this->connection
      ->escapeLike($alias), 'LIKE');
    $this
      ->addLanguageFallback($select, $langcode);
    $select
      ->orderBy('base_table.id', 'DESC');
    return $select
      ->execute()
      ->fetchAssoc() ?: NULL;
  }

  /**
   * {@inheritdoc}
   */
  public function pathHasMatchingAlias($initial_substring) {
    $query = $this
      ->getBaseQuery();
    $query
      ->addExpression(1);
    return (bool) $query
      ->condition('base_table.path', $this->connection
      ->escapeLike($initial_substring) . '%', 'LIKE')
      ->range(0, 1)
      ->execute()
      ->fetchField();
  }

  /**
   * Returns a SELECT query for the path_alias base table.
   *
   * @return \Drupal\Core\Database\Query\SelectInterface
   *   A Select query object.
   */
  protected function getBaseQuery() {
    $query = $this->connection
      ->select('path_alias', 'base_table');
    $query
      ->condition('base_table.status', 1);
    return $query;
  }

  /**
   * Adds path alias language fallback conditions to a select query object.
   *
   * @param \Drupal\Core\Database\Query\SelectInterface $query
   *   A Select query object.
   * @param string $langcode
   *   Language code to search the path with. If there's no path defined for
   *   that language it will search paths without language.
   */
  protected function addLanguageFallback(SelectInterface $query, $langcode) {

    // Always get the language-specific alias before the language-neutral one.
    // For example 'de' is less than 'und' so the order needs to be ASC, while
    // 'xx-lolspeak' is more than 'und' so the order needs to be DESC.
    $langcode_list = [
      $langcode,
      LanguageInterface::LANGCODE_NOT_SPECIFIED,
    ];
    if ($langcode === LanguageInterface::LANGCODE_NOT_SPECIFIED) {
      array_pop($langcode_list);
    }
    elseif ($langcode > LanguageInterface::LANGCODE_NOT_SPECIFIED) {
      $query
        ->orderBy('base_table.langcode', 'DESC');
    }
    else {
      $query
        ->orderBy('base_table.langcode', 'ASC');
    }
    $query
      ->condition('base_table.langcode', $langcode_list, 'IN');
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AliasRepository::$connection	protected	property	The database connection.
AliasRepository::addLanguageFallback	protected	function	Adds path alias language fallback conditions to a select query object.
AliasRepository::getBaseQuery	protected	function	Returns a SELECT query for the path_alias base table.	1
AliasRepository::lookupByAlias	public	function	Searches a path alias for a given alias. Overrides AliasRepositoryInterface::lookupByAlias
AliasRepository::lookupBySystemPath	public	function	Searches a path alias for a given Drupal system path. Overrides AliasRepositoryInterface::lookupBySystemPath
AliasRepository::pathHasMatchingAlias	public	function	Check if any alias exists starting with $initial_substring. Overrides AliasRepositoryInterface::pathHasMatchingAlias
AliasRepository::preloadPathAlias	public	function	Pre-loads path alias information for a given list of system paths. Overrides AliasRepositoryInterface::preloadPathAlias
AliasRepository::__construct	public	function	Constructs an AliasRepository object.