/**
* Try to backup data in memory
*
* @return string Returns a message describing the result
*/
public function rescueData()
{
$resultMessageParts = array();
$data = $this->coordinator instanceof Coordinator ? $this->coordinator->getObjectStore() : array();
$backupDirectory = $this->getRescueDirectory();
if ($data) {
foreach ($data as $databaseIdentifier => $database) {
$currentData = NULL;
if ($database instanceof Database) {
$currentData = $database->getRawData();
} else {
if ($database instanceof \Iterator) {
$currentData = iterator_to_array($database);
}
}
if (!$currentData) {
$resultMessageParts[] = sprintf('Can not rescue database %s', $databaseIdentifier);
continue;
}
$backupData = NULL;
$jsonData = json_encode($currentData, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
if ($jsonData) {
$backupData = $jsonData;
} else {
$backupData = serialize($currentData);
}
$backupPath = $backupDirectory . $databaseIdentifier . '.' . ($jsonData ? 'json' : 'bin');
if (file_put_contents($backupPath, $backupData)) {
$resultMessageParts[] = sprintf('Created backup of database %s at %s', $databaseIdentifier, $backupPath);
} else {
$resultMessageParts[] = sprintf('Can not rescue database %s', $databaseIdentifier);
}
}
} else {
$resultMessageParts[] = sprintf('Can not find any data to rescue');
}
return implode(PHP_EOL, $resultMessageParts);
}
