{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE OverloadedStrings  #-}
{-# LANGUAGE RecordWildCards    #-}
{-# LANGUAGE TypeFamilies       #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-binds   #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Network.AWS.Lambda.UpdateAlias
-- Copyright   : (c) 2013-2016 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Using this API you can update the function version to which the alias
-- points and the alias description. For more information, see
-- <http://docs.aws.amazon.com/lambda/latest/dg/aliases-intro.html Introduction to AWS Lambda Aliases>.
--
-- This requires permission for the lambda:UpdateAlias action.
module Network.AWS.Lambda.UpdateAlias
    (
    -- * Creating a Request
      updateAlias
    , UpdateAlias
    -- * Request Lenses
    , uaFunctionVersion
    , uaDescription
    , uaFunctionName
    , uaName

    -- * Destructuring the Response
    , aliasConfiguration
    , AliasConfiguration
    -- * Response Lenses
    , acName
    , acFunctionVersion
    , acAliasARN
    , acDescription
    ) where

import           Network.AWS.Lambda.Types
import           Network.AWS.Lambda.Types.Product
import           Network.AWS.Lens
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | /See:/ 'updateAlias' smart constructor.
data UpdateAlias = UpdateAlias'
    { _uaFunctionVersion :: !(Maybe Text)
    , _uaDescription     :: !(Maybe Text)
    , _uaFunctionName    :: !Text
    , _uaName            :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'UpdateAlias' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'uaFunctionVersion'
--
-- * 'uaDescription'
--
-- * 'uaFunctionName'
--
-- * 'uaName'
updateAlias
    :: Text -- ^ 'uaFunctionName'
    -> Text -- ^ 'uaName'
    -> UpdateAlias
updateAlias pFunctionName_ pName_ =
    UpdateAlias'
    { _uaFunctionVersion = Nothing
    , _uaDescription = Nothing
    , _uaFunctionName = pFunctionName_
    , _uaName = pName_
    }

-- | Using this parameter you can change the Lambda function version to which
-- the alias points.
uaFunctionVersion :: Lens' UpdateAlias (Maybe Text)
uaFunctionVersion = lens _uaFunctionVersion (\ s a -> s{_uaFunctionVersion = a});

-- | You can change the description of the alias using this parameter.
uaDescription :: Lens' UpdateAlias (Maybe Text)
uaDescription = lens _uaDescription (\ s a -> s{_uaDescription = a});

-- | The function name for which the alias is created.
uaFunctionName :: Lens' UpdateAlias Text
uaFunctionName = lens _uaFunctionName (\ s a -> s{_uaFunctionName = a});

-- | The alias name.
uaName :: Lens' UpdateAlias Text
uaName = lens _uaName (\ s a -> s{_uaName = a});

instance AWSRequest UpdateAlias where
        type Rs UpdateAlias = AliasConfiguration
        request = putJSON lambda
        response = receiveJSON (\ s h x -> eitherParseJSON x)

instance Hashable UpdateAlias

instance NFData UpdateAlias

instance ToHeaders UpdateAlias where
        toHeaders = const mempty

instance ToJSON UpdateAlias where
        toJSON UpdateAlias'{..}
          = object
              (catMaybes
                 [("FunctionVersion" .=) <$> _uaFunctionVersion,
                  ("Description" .=) <$> _uaDescription])

instance ToPath UpdateAlias where
        toPath UpdateAlias'{..}
          = mconcat
              ["/2015-03-31/functions/", toBS _uaFunctionName,
               "/aliases/", toBS _uaName]

instance ToQuery UpdateAlias where
        toQuery = const mempty