public function handle(Command $command, ClientContext $context) : Generator
{
if ($command->argCount() !== 1) {
yield from $context->writeResponse(new Response(501, 'Invalid number of arguments'));
return;
}
try {
$name = $command->arg(0);
$cursor = (yield from $context->getAccessLayer()->getGroupCursor($name));
$context->setCursor($cursor);
} catch (NotFoundException $e) {
yield from $context->writeResponse(new Response(411, 'No such newsgroup'));
return;
}
$group = $context->getCursor()->getGroup();
yield from $context->writeResponse(new Response(211, $group->count() . ' ' . $group->lowWaterMark() . ' ' . $group->highWaterMark() . ' ' . $group->name() . ' Group successfully selected'));
}