class SqliteDateSql in Drupal 8

SQLite-specific date handling.

@internal This class should only be used by the Views SQL query plugin.

Hierarchy

• class \Drupal\views\Plugin\views\query\SqliteDateSql implements DateSqlInterface uses DependencySerializationTrait

See also

\Drupal\views\Plugin\views\query\Sql

1 file declares its use of SqliteDateSql

SqliteDateSqlTest.php in core/modules/views/tests/src/Unit/Plugin/views/query/SqliteDateSqlTest.php

1 string reference to 'SqliteDateSql'

views.services.yml in core/modules/views/views.services.yml

core/modules/views/views.services.yml

1 service uses SqliteDateSql

sqlite.views.date_sql in core/modules/views/views.services.yml

Drupal\views\Plugin\views\query\SqliteDateSql

File

core/modules/views/src/Plugin/views/query/SqliteDateSql.php, line 16

Namespace

Drupal\views\Plugin\views\query

class SqliteDateSql implements DateSqlInterface {
  use DependencySerializationTrait;

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

  /**
   * An array of PHP-to-SQLite date replacement patterns.
   *
   * @var array
   */
  protected static $replace = [
    'Y' => '%Y',
    // No format for 2 digit year number.
    'y' => '%Y',
    // No format for 3 letter month name.
    'M' => '%m',
    'm' => '%m',
    // No format for month number without leading zeros.
    'n' => '%m',
    // No format for full month name.
    'F' => '%m',
    // No format for 3 letter day name.
    'D' => '%d',
    'd' => '%d',
    // No format for full day name.
    'l' => '%d',
    // no format for day of month number without leading zeros.
    'j' => '%d',
    'W' => '%W',
    'H' => '%H',
    // No format for 12 hour hour with leading zeros.
    'h' => '%H',
    'i' => '%M',
    's' => '%S',
    // No format for AM/PM.
    'A' => '',
  ];

  /**
   * Constructs the SQLite-specific date sql class.
   *
   * @param \Drupal\Core\Database\Connection $database
   *   The database connection.
   */
  public function __construct(Connection $database) {
    $this->database = $database;
  }

  /**
   * {@inheritdoc}
   */
  public function getDateField($field, $string_date) {
    if ($string_date) {
      $field = "strftime('%s', {$field})";
    }
    return $field;
  }

  /**
   * {@inheritdoc}
   */
  public function getDateFormat($field, $format) {
    $format = strtr($format, static::$replace);

    // SQLite does not have a ISO week substitution string, so it needs special
    // handling.
    // @see http://wikipedia.org/wiki/ISO_week_date#Calculation
    // @see http://stackoverflow.com/a/15511864/1499564
    if ($format === '%W') {
      $expression = "((strftime('%j', date(strftime('%Y-%m-%d', {$field}, 'unixepoch'), '-3 days', 'weekday 4')) - 1) / 7 + 1)";
    }
    else {
      $expression = "strftime('{$format}', {$field}, 'unixepoch')";
    }

    // The expression yields a string, but the comparison value is an integer in
    // case the comparison value is a float, integer, or numeric. All of the
    // above SQLite format tokens only produce integers. However, the given
    // $format may contain 'Y-m-d', which results in a string.
    // @see \Drupal\Core\Database\Driver\sqlite\Connection::expandArguments()
    // @see http://www.sqlite.org/lang_datefunc.html
    // @see http://www.sqlite.org/lang_expr.html#castexpr
    if (preg_match('/^(?:%\\w)+$/', $format)) {
      $expression = "CAST({$expression} AS NUMERIC)";
    }
    return $expression;
  }

  /**
   * {@inheritdoc}
   */
  public function setTimezoneOffset($offset) {

    // Nothing to do here.
  }

  /**
   * {@inheritdoc}
   */
  public function setFieldTimezoneOffset(&$field, $offset, $string_date = FALSE) {
    if (!empty($offset)) {
      $field = "({$field} + {$offset})";
    }
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
SqliteDateSql::$database	protected	property	The database connection.
SqliteDateSql::$replace	protected static	property	An array of PHP-to-SQLite date replacement patterns.
SqliteDateSql::getDateField	public	function	Returns a native database expression for a given field. Overrides DateSqlInterface::getDateField
SqliteDateSql::getDateFormat	public	function	Creates a native database date formatting. Overrides DateSqlInterface::getDateFormat
SqliteDateSql::setFieldTimezoneOffset	public	function	Applies the given offset to the given field. Overrides DateSqlInterface::setFieldTimezoneOffset
SqliteDateSql::setTimezoneOffset	public	function	Set the database to the given timezone. Overrides DateSqlInterface::setTimezoneOffset
SqliteDateSql::__construct	public	function	Constructs the SQLite-specific date sql class.