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<?php

namespace Drupal\Tests\Core\Database\Stub;

use Drupal\Core\Database\Connection;
use Drupal\Core\Database\Log;
use Drupal\Core\Database\StatementEmpty;
use Drupal\Core\Database\StatementWrapper;

/**
 * A stub of the abstract Connection class for testing purposes.
 *
 * Includes minimal implementations of Connection's abstract methods.
 */
class StubConnection extends Connection {

  /**
   * {@inheritdoc}
   */
  protected $statementClass = NULL;

  /**
   * {@inheritdoc}
   */
  protected $statementWrapperClass = StatementWrapper::class;

  /**
   * Public property so we can test driver loading mechanism.
   *
   * @var string
   * @see driver().
   */
  public $driver = 'stub';

  /**
   * Constructs a Connection object.
   *
   * @param \PDO $connection
   *   An object of the PDO class representing a database connection.
   * @param array $connection_options
   *   An array of options for the connection.
   * @param string[]|null $identifier_quotes
   *   The identifier quote characters. Defaults to an empty strings.
   * @param string|null $statement_class
   *   A class to use as a statement class for deprecation testing.
   */
  public function __construct(\PDO $connection, array $connection_options, $identifier_quotes = ['', ''], $statement_class = NULL) {
    $this->identifierQuotes = $identifier_quotes;
    if ($statement_class) {
      $this->statementClass = $statement_class;
      $this->statementWrapperClass = NULL;
    }
    parent::__construct($connection, $connection_options);
  }

  /**
   * {@inheritdoc}
   */
  public function queryRange($query, $from, $count, array $args = [], array $options = []) {
    return new StatementEmpty();
  }

  /**
   * {@inheritdoc}
   */
  public function queryTemporary($query, array $args = [], array $options = []) {
    return '';
  }

  /**
   * {@inheritdoc}
   */
  public function driver() {
    return $this->driver;
  }

  /**
   * {@inheritdoc}
   */
  public function databaseType() {
    return 'stub';
  }

  /**
   * {@inheritdoc}
   */
  public function createDatabase($database) {}

  /**
   * {@inheritdoc}
   */
  public function mapConditionOperator($operator) {
    return NULL;
  }

  /**
   * {@inheritdoc}
   */
  public function nextId($existing_id = 0) {
    return 0;
  }

  /**
   * Helper method to test database classes are not included in backtraces.
   *
   * @return array
   *   The caller stack entry.
   */
  public function testLogCaller() {
    return (new Log())->findCaller();
  }

}