content: {-| Module describing an NIC.
  
  The NIC data type only holds data about a NIC, but does not provide any
  logic.
  
  -}
  
  {-
  
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  -}
  
  module Ganeti.HTools.Nic
    ( Nic(..)
    , Mode(..)
    , List
    , create
    ) where
  
  import qualified Ganeti.HTools.Container as Container
  
  import qualified Ganeti.HTools.Types as T
  
  -- * Type declarations
  
  data Mode = Bridged | Routed | OpenVSwitch deriving (Show, Eq)
  
  -- | The NIC type.
  --
  -- It holds the data for a NIC as it is provided via the IAllocator protocol
  -- for an instance creation request. All data in those request is optional,
  -- that's why all fields are Maybe's.
  --
  -- TODO: Another name might be more appropriate for this type, as for example
  -- RequestedNic. But this type is used as a field in the Instance type, which
  -- is not named RequestedInstance, so such a name would be weird. PartialNic
  -- already exists in Objects, but doesn't fit the bill here, as it contains
  -- a required field (mac). Objects and the types therein are subject to being
  -- reworked, so until then this type is left as is.
  data Nic = Nic
    { mac          :: Maybe String -- ^ MAC address of the NIC
    , ip           :: Maybe String -- ^ IP address of the NIC
    , mode         :: Maybe Mode   -- ^ the mode the NIC operates in
    , link         :: Maybe String -- ^ the link of the NIC
    , bridge       :: Maybe String -- ^ the bridge this NIC is connected to if
                                   --   the mode is Bridged
    , network      :: Maybe T.NetworkID -- ^ network UUID if this NIC is connected
                                   --   to a network
    } deriving (Show, Eq)
  
  -- | A simple name for an instance map.
  type List = Container.Container Nic
  
  -- * Initialization
  
  -- | Create a NIC.
  --
  create :: Maybe String
         -> Maybe String
         -> Maybe Mode
         -> Maybe String
         -> Maybe String
         -> Maybe T.NetworkID
         -> Nic
  create mac_init ip_init mode_init link_init bridge_init network_init =
    Nic { mac = mac_init
        , ip = ip_init
        , mode = mode_init
        , link = link_init
        , bridge = bridge_init
        , network = network_init
        }
  