/**
* Generates a code, verifying that no card use it.
*
* @return string
*/
private function generateCode()
{
$code = $this->codeGenerator->generate('xx-xx-xx');
while ($this->connectToStorageInternalWorker->connect()->findOne(['code' => $code])) {
$code = $this->codeGenerator->generate();
}
return $code;
}
/**
* Picks the card with given code.
*
* @param string $code
*
* @return array An array with the following keys:
* code, role and consumed.
*
* @throws NonExistentCodeInternalException
*/
public function pick($code)
{
$card = $this->connectToStorageInternalWorker->connect()->findOne(['code' => $code], ['_id' => 0]);
if (!$card) {
throw new NonExistentCodeInternalException($code);
}
return $card;
}
/**
* Consumes card with given code.
*
* @param string $code
*
* @throws NonExistentCodeSharedException
* @throws AlreadyConsumedSharedException
*/
public function consume($code)
{
try {
$card = $this->pickCardSharedWorker->pick($code);
} catch (NonExistentCodeInternalException $e) {
throw new NonExistentCodeSharedException();
}
if ($card['consumed']) {
throw new AlreadyConsumedSharedException();
}
$this->connectToStorageInternalWorker->connect()->update(array('code' => $code), array('$set' => array('consumed' => true)));
}
/**
* Collects invitation cards.
*
* @return \Iterator
*/
public function collect()
{
return $this->connectToStorageInternalWorker->connect()->find()->fields(['_id' => 0]);
}