/**
* Looks up pickup details in cache.
*
* Performance: O(1) time complexity (constant time)
*
* @param $shipmentID
* @return bool|PickupRequest returns false if pickup request doesn't exist in the cache,
* otherwise it returns a PickupRequest model instance containing request details
*/
public function lookupPickupRequest($shipmentID)
{
$shipmentID = intval($shipmentID);
if (!is_int($shipmentID)) {
throw new InvalidArgumentException("lookupPickupRequest expects shipment id to be an integer. Input was: {$shipmentID}");
}
if (!$this->client->exists(self::pickupRequestPath($shipmentID))) {
return false;
}
//O(1) time complexity
$values = $this->client->hmget(self::pickupRequestPath($shipmentID), PickupRequest::$PICKUP_REQUEST_ATTRIBUTE_KEYS);
return PickupRequest::fromValues($shipmentID, $values);
}
