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<?php
namespace Drupal\views\Plugin\views\query;
use Drupal\Core\Database\Connection;
use Drupal\Core\DependencyInjection\DependencySerializationTrait;
/**
* SQLite-specific date handling.
*
* @internal
* This class should only be used by the Views SQL query plugin.
*
* @see \Drupal\views\Plugin\views\query\Sql
*/
class SqliteDateSql implements DateSqlInterface {
use DependencySerializationTrait;
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/**
* 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)";
}
}
}