protected function fetchArticle(Command $command, ClientContext $context) : Generator
{
// Current article?
if ($command->argCount() === 0) {
if (!$context->getCursor()->valid()) {
yield from $context->writeResponse(new Response(412, 'No newsgroup selected'));
return;
}
return $context->getCursor()->getArticle();
} elseif (is_numeric($command->arg(0))) {
$number = (int) $command->arg(0);
if (!$context->getCursor()->valid()) {
yield from $context->writeResponse(new Response(412, 'No newsgroup selected'));
return;
}
if (!(yield from $context->getCursor()->seek($number))) {
yield from $context->writeResponse(new Response(423, 'No article with that number'));
return;
}
return $context->getCursor()->getArticle();
} else {
$article = (yield from $context->getAccessLayer()->getArticleById($command->arg(0)));
if (!$article) {
yield from $context->writeResponse(new Response(430, 'No article with that message-id'));
return;
}
}
return $article;
}
public function writeCommand(WritableStream $stream, Command $command) : Generator
{
yield from $stream->write($command->name());
foreach ($command->args() as $arg) {
yield from $stream->write(' ' . $arg);
}
yield from $stream->write("\r\n");
}
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'));
}
