/**
* Parse an offset following a prefix and set the ZoneId if it is valid.
* To matching the parsing of ZoneId.of the values are not normalized
* to ZoneOffsets.
*
* @param DateTimeParseContext $context the parse context
* @param string $text the input text
* @param int $prefixPos start of the prefix
* @param int $position start of text after the prefix
* @param OffsetIdPrinterParser $parser parser for the value after the prefix
* @return int the position after the parse
*/
private function parseOffsetBased(DateTimeParseContext $context, $text, $prefixPos, $position, OffsetIdPrinterParser $parser)
{
$prefix = strtoupper(substr($text, $prefixPos, $position - $prefixPos));
if ($position >= strlen($text)) {
$context->setParsedZone(ZoneId::of($prefix));
return $position;
}
// '0' or 'Z' after prefix is not part of a valid ZoneId; use bare prefix
if ($text[$position] === '0' || $context->charEquals($text[$position], 'Z')) {
$context->setParsedZone(ZoneId::of($prefix));
return $position;
}
$newContext = $context->copy();
$endPos = $parser->parse($newContext, $text, $position);
try {
if ($endPos < 0) {
if ($parser == OffsetIdPrinterParser::INSTANCE_ID_Z()) {
return ~$prefixPos;
}
$context->setParsedZone(ZoneId::of($prefix));
return $position;
}
$offset = $newContext->getParsed(ChronoField::OFFSET_SECONDS());
$zoneOffset = ZoneOffset::ofTotalSeconds($offset);
$context->setParsedZone(ZoneId::ofOffset($prefix, $zoneOffset));
return $endPos;
} catch (DateTimeException $dte) {
return ~$prefixPos;
}
}
public function test_nullOffsetOfOffset()
{
TestHelper::assertNullException($this, function () {
ZoneId::ofOffset("GMT", null);
});
}