<?php
require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'config.inc');
require_once(dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc');

class MySQLPDOTest extends PDOTest {

	static function factory($classname = 'PDO', $drop_test_tables = false, $myattr = null) {

		$dsn 	= self::getDSN();
		$user	= PDO_MYSQL_TEST_USER;
		$pass	= PDO_MYSQL_TEST_PASS;
		$attr	= getenv('PDOTEST_ATTR');

		if (is_string($attr) && strlen($attr)) {
			$attr = unserialize($attr);
		} else {
			$attr = null;
		}
		if ($user === false)
			$user = NULL;
		if ($pass === false)
			$pass = NULL;

		$db = new $classname($dsn, $user, $pass, $attr);
		if (!$db) {
			die("Could not create PDO object (DSN=$dsn, user=$user)\n");
		}

		$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING);
		$db->setAttribute(PDO::ATTR_CASE, PDO::CASE_LOWER);

		return $db;
	}

	static function createTestTable($db, $engine = null) {
		if (!$engine)
			$engine = PDO_MYSQL_TEST_ENGINE;

		$db->exec('DROP TABLE IF EXISTS test');
		$db->exec('CREATE TABLE test(id INT, label CHAR(1), PRIMARY KEY(id)) ENGINE=' . $engine);
		$db->exec('INSERT INTO test(id, label) VALUES (1, "a"), (2, "b"), (3, "c"), (4, "d"), (5, "e"), (6, "f")');
	}

	static function getTableEngine() {
		return PDO_MYSQL_TEST_ENGINE;
	}


	static function getDSN($new_options = null, $addition = '') {
		if (!$new_options)
			return PDO_MYSQL_TEST_DSN . $addition;

		$old_options = array();
		$dsn = substr(PDO_MYSQL_TEST_DSN,
			strpos(PDO_MYSQL_TEST_DSN, ':') + 1,
			strlen(PDO_MYSQL_TEST_DSN));

		// no real parser - any excotic setting can fool us
		$parts = explode(';', $dsn);
		foreach ($parts as $k => $v) {
			$tmp = explode('=', $v);
			if (count($tmp) == 2)
				$old_options[$tmp[0]] = $tmp[1];
		}

		$options = $old_options;
		foreach ($new_options as $k => $v)
			$options[$k] = $v;

		$dsn = 'mysql:';
		foreach ($options as $k => $v)
			$dsn .= sprintf('%s=%s;', $k, $v);

		if ($addition)
			$dsn .= $addition;
		else
			$dsn = substr($dsn, 0, strlen($dsn) -1);

		return $dsn;
	}

	static function getClientVersion($db) {
		return self::extractVersion($db->getAttribute(PDO::ATTR_CLIENT_VERSION));
	}

	static function getServerVersion($db) {
		return self::extractVersion($db->getAttribute(PDO::ATTR_SERVER_VERSION));
	}

	static function extractVersion($version_string) {
		/*
		TODO:
		We're a bit in trouble: PDO_MYSQL returns version strings.
		That's wrong according to the manual. According to the manual
		integers should be returned. However, this code needs to work
		with stinky PDO_MYSQL and hopefully better PDO_MYSQLND.
		*/

		// already an int value?
		if (is_int($version_string))
			return $version_string;

		// string but int value?
		$tmp = (int)$version_string;
		if (((string)$tmp) === $version_string)
			return $tmp;

		// stinky string which we need to parse
		$parts = explode('.', $version_string);
		if (count($parts) != 3)
			return -1;

		$version = (int)$parts[0] * 10000;
		$version+= (int)$parts[1] * 100;
		$version+= (int)$parts[2];

		return $version;
	}

	static function getTempDir() {

		if (!function_exists('sys_get_temp_dir')) {

			if (!empty($_ENV['TMP']))
				return realpath( $_ENV['TMP'] );
			if (!empty($_ENV['TMPDIR']))
				return realpath( $_ENV['TMPDIR'] );
			if (!empty($_ENV['TEMP']))
				return realpath( $_ENV['TEMP'] );

			$temp_file = tempnam(md5(uniqid(rand(), TRUE)), '');
			if ($temp_file) {
				$temp_dir = realpath(dirname($temp_file));
				unlink($temp_file);
				return $temp_dir;
			}
			return FALSE;
		} else {
			return sys_get_temp_dir();
		}

	}

	static function detect_transactional_mysql_engine($db) {
		foreach ($db->query("show variables like 'have%'") as $row) {
			if ($row[1] == 'YES' && ($row[0] == 'have_innodb' || $row[0] == 'have_bdb')) {
				return str_replace("have_", "", $row[0]);
			}
		}
		return false;
	}

	static function isPDOMySQLnd() {
			ob_start();
			phpinfo();
			$tmp = ob_get_contents();
			ob_end_clean();
			return (bool)preg_match('/Client API version.*mysqlnd/', $tmp);
	}

	static function dropTestTable($db = NULL) {
		if (is_null($db)) 
			$db = self::factory();

		$db->exec('DROP TABLE IF EXISTS test');
	}

}
?>