/**
* This implementation looks for the longest matching string.
* For example, parsing Etc/GMT-2 will return Etc/GMC-2 rather than just
* Etc/GMC although both are valid.
*/
public function parse(DateTimeParseContext $context, $text, $position)
{
$length = strlen($text);
if ($position > $length) {
throw new \OutOfRangeException();
}
if ($position === $length) {
return ~$position;
}
// handle fixed time-zone IDs
$nextChar = $text[$position];
if ($nextChar === '+' || $nextChar === '-') {
return $this->parseOffsetBased($context, $text, $position, $position, OffsetIdPrinterParser::INSTANCE_ID_Z());
} else {
if ($length >= $position + 2) {
$nextNextChar = $text[$position + 1];
if ($context->charEquals($nextChar, 'U') && $context->charEquals($nextNextChar, 'T')) {
if ($length >= $position + 3 && $context->charEquals($text[$position + 2], 'C')) {
return $this->parseOffsetBased($context, $text, $position, $position + 3, OffsetIdPrinterParser::INSTANCE_ID_ZERO());
}
return $this->parseOffsetBased($context, $text, $position, $position + 2, OffsetIdPrinterParser::INSTANCE_ID_ZERO());
} else {
if ($context->charEquals($nextChar, 'G') && $length >= $position + 3 && $context->charEquals($nextNextChar, 'M') && $context->charEquals($text[$position + 2], 'T')) {
return $this->parseOffsetBased($context, $text, $position, $position + 3, OffsetIdPrinterParser::INSTANCE_ID_ZERO());
}
}
}
}
// parse
$ppos = new ParsePosition($position);
$parsedZoneId = $this->match($text, $ppos, $context->isCaseSensitive());
/*
$tree = $this->getTree($context);
$parsedZoneId = $tree->match($text, $ppos);
*/
if ($parsedZoneId === null) {
if ($context->charEquals($nextChar, 'Z')) {
$context->setParsedZone(ZoneOffset::UTC());
return $position + 1;
}
return ~$position;
}
$context->setParsedZone(ZoneId::of($parsedZoneId));
return $ppos->getIndex();
}
