public function handle(Command $command, ClientContext $context) : Generator
{
if ($command->argCount() === 0) {
$group = $this->currentGroup;
}
$name = $command->arg(0);
$group = (yield from $context->getAccessLayer()->getGroupByName($name));
if (!$group) {
yield from $context->writeResponse(new Response(411, 'No such newsgroup'));
return;
}
$context->setCurrentGroup($group->name());
$context->setCurrentArticle($group->lowWaterMark());
yield from $context->writeResponse(new Response(211, $group->count() . ' ' . $group->lowWaterMark() . ' ' . $group->highWaterMark() . ' ' . $group->name() . ' Group successfully selected'));
}