friendica-github/tests/Util/Database/StaticDatabase.php

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<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Test\Util\Database;
use Friendica\Database\Database;
use Friendica\Database\DatabaseException;
use PDO;
use PDOException;
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/**
* Overrides the Friendica database class for re-using the connection
* for different tests
*
* Overrides functionality to enforce one transaction per call (for nested transactions)
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*/
class StaticDatabase extends Database
{
/**
* @var ExtendedPDO
*/
private static $staticConnection;
/** @var bool */
private $_locked = false;
/**
* Override the behaviour of connect, due there is just one, static connection at all
*
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* @return bool Success
*/
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public function connect(): bool
{
if (!is_null($this->connection) && $this->connected()) {
return true;
}
if (!isset(self::$staticConnection)) {
self::statConnect($_SERVER);
}
$this->driver = 'pdo';
$this->connection = self::$staticConnection;
$this->connected = true;
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$this->emulate_prepares = false;
return $this->connected;
}
/**
* Override the transaction since there are now hierachical transactions possible
*
* @return bool
*/
public function transaction(): bool
{
if (!$this->in_transaction && !$this->connection->beginTransaction()) {
return false;
}
$this->in_transaction = true;
return true;
}
/** Mock for locking tables */
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public function lock($table): bool
{
if ($this->_locked) {
return false;
}
$this->in_transaction = true;
$this->_locked = true;
return true;
}
/** Mock for unlocking tables */
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public function unlock(): bool
{
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
$this->performCommit();
$this->in_transaction = false;
$this->_locked = false;
return true;
}
/**
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* Does a commit
*
* @return bool Was the command executed successfully?
*/
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public function commit(): bool
{
if (!$this->performCommit()) {
return false;
}
$this->in_transaction = false;
return true;
}
/**
* Setup of the global, static connection
* Either through explicit calling or through implicit using the Database
*
* @param array $server $_SERVER variables
*
* @throws \Exception
*/
public static function statConnect(array $server)
{
// Use environment variables for mysql if they are set beforehand
if (!empty($server['MYSQL_HOST'])
&& (!empty($server['MYSQL_USERNAME']) || !empty($server['MYSQL_USER']))
&& $server['MYSQL_PASSWORD'] !== false
&& !empty($server['MYSQL_DATABASE']))
{
$db_host = $server['MYSQL_HOST'];
if (!empty($server['MYSQL_PORT'])) {
$db_host .= ':' . $server['MYSQL_PORT'];
}
if (!empty($server['MYSQL_USERNAME'])) {
$db_user = $server['MYSQL_USERNAME'];
} else {
$db_user = $server['MYSQL_USER'];
}
$db_pw = (string) $server['MYSQL_PASSWORD'];
$db_data = $server['MYSQL_DATABASE'];
}
if (empty($db_host) || empty($db_user) || empty($db_data)) {
throw new DatabaseException('Either one of the following settings are missing: Host, User or Database', 999, 'CONNECT');
}
$port = 0;
$serveraddr = trim($db_host);
$serverdata = explode(':', $serveraddr);
$server = $serverdata[0];
if (count($serverdata) > 1) {
$port = trim($serverdata[1]);
}
$server = trim($server);
$user = trim($db_user);
$pass = trim($db_pw ?? '');
$db = trim($db_data);
if (!(strlen($server) && strlen($user))) {
return;
}
$connect = "mysql:host=" . $server . ";dbname=" . $db;
if ($port > 0) {
$connect .= ";port=" . $port;
}
try {
self::$staticConnection = @new ExtendedPDO($connect, $user, $pass);
self::$staticConnection->setAttribute(PDO::ATTR_AUTOCOMMIT,0);
} catch (PDOException $e) {
/// @TODO Try to find a way to log this exception as it contains valueable information
}
}
/**
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* @return ExtendedPDO The global, static connection
*/
public static function getGlobConnection()
{
return self::$staticConnection;
}
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/**
* Perform a global rollback for every nested transaction of the static connection
*/
public static function statRollback()
{
if (isset(self::$staticConnection)) {
while (self::$staticConnection->getTransactionDepth() > 0) {
self::$staticConnection->rollBack();
}
}
}
}