/**
* Validates the given version in string format and returns the version as instance of Version
*
* @param string $versionHeader The DataServiceVersion or MaxDataServiceVersion header value
* @param string $headerName The name of the header
*
* @return Version
*
* @throws ODataException If the version is malformed or not supported
*/
private static function _validateAndGetVersion($versionHeader, $headerName)
{
$libName = null;
$versionHeader = trim($versionHeader);
$libNameIndex = strpos($versionHeader, ';');
if ($libNameIndex !== false) {
$libName = substr($versionHeader, $libNameIndex);
} else {
$libNameIndex = strlen($versionHeader);
}
$dotIndex = -1;
for ($i = 0; $i < $libNameIndex; $i++) {
if ($versionHeader[$i] == '.') {
if ($dotIndex != -1) {
ODataException::createBadRequestError(Messages::requestDescriptionInvalidVersionHeader($versionHeader, $headerName));
}
$dotIndex = $i;
} else {
if ($versionHeader[$i] < '0' || $versionHeader[$i] > '9') {
ODataException::createBadRequestError(Messages::requestDescriptionInvalidVersionHeader($versionHeader, $headerName));
}
}
}
$major = $minor = 0;
if ($dotIndex != -1) {
if ($dotIndex == 0) {
ODataException::createBadRequestError(Messages::requestDescriptionInvalidVersionHeader($versionHeader, $headerName));
}
$major = intval(substr($versionHeader, 0, $dotIndex));
$minor = intval(substr($versionHeader, $dotIndex + 1, $libNameIndex));
} else {
$major = intval(substr($versionHeader, 0, $dotIndex));
$minor = 0;
}
$version = new Version($major, $minor);
$isSupportedVersion = false;
foreach (self::getKnownDataServiceVersions() as $version1) {
if ($version->compare($version1) == 0) {
$isSupportedVersion = true;
break;
}
}
if (!$isSupportedVersion) {
$availableVersions = null;
foreach (self::getKnownDataServiceVersions() as $version1) {
$availableVersions .= $version1->toString() . ', ';
}
$availableVersions = rtrim($availableVersions, ', ');
ODataException::createBadRequestError(Messages::requestDescriptionUnSupportedVersion($headerName, $versionHeader, $availableVersions));
}
return $version;
}
