EC2Host.hs

{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-host.html

module Stratosphere.Resources.EC2Host where

import Control.Lens hiding ((.=))
import Data.Aeson
import Data.Maybe (catMaybes)
import Data.Monoid (mempty)
import Data.Text

import Stratosphere.Values


-- | Full data type definition for EC2Host. See 'ec2Host' for a more
-- | convenient constructor.
data EC2Host =
  EC2Host
  { _eC2HostAutoPlacement :: Maybe (Val Text)
  , _eC2HostAvailabilityZone :: Val Text
  , _eC2HostInstanceType :: Val Text
  } deriving (Show, Eq)

instance ToJSON EC2Host where
  toJSON EC2Host{..} =
    object $
    catMaybes
    [ ("AutoPlacement" .=) <$> _eC2HostAutoPlacement
    , Just ("AvailabilityZone" .= _eC2HostAvailabilityZone)
    , Just ("InstanceType" .= _eC2HostInstanceType)
    ]

instance FromJSON EC2Host where
  parseJSON (Object obj) =
    EC2Host <$>
      obj .:? "AutoPlacement" <*>
      obj .: "AvailabilityZone" <*>
      obj .: "InstanceType"
  parseJSON _ = mempty

-- | Constructor for 'EC2Host' containing required fields as arguments.
ec2Host
  :: Val Text -- ^ 'echAvailabilityZone'
  -> Val Text -- ^ 'echInstanceType'
  -> EC2Host
ec2Host availabilityZonearg instanceTypearg =
  EC2Host
  { _eC2HostAutoPlacement = Nothing
  , _eC2HostAvailabilityZone = availabilityZonearg
  , _eC2HostInstanceType = instanceTypearg
  }

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-host.html#cfn-ec2-host-autoplacement
echAutoPlacement :: Lens' EC2Host (Maybe (Val Text))
echAutoPlacement = lens _eC2HostAutoPlacement (\s a -> s { _eC2HostAutoPlacement = a })

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-host.html#cfn-ec2-host-availabilityzone
echAvailabilityZone :: Lens' EC2Host (Val Text)
echAvailabilityZone = lens _eC2HostAvailabilityZone (\s a -> s { _eC2HostAvailabilityZone = a })

-- | http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-ec2-host.html#cfn-ec2-host-instancetype
echInstanceType :: Lens' EC2Host (Val Text)
echInstanceType = lens _eC2HostInstanceType (\s a -> s { _eC2HostInstanceType = a })