{-# 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.DeleteFunction
-- Copyright   : (c) 2013-2015 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)
--
-- Deletes the specified Lambda function code and configuration.
--
-- If you don\'t specify a function version, AWS Lambda will delete the
-- function, including all its versions, and any aliases pointing to the
-- function versions.
--
-- When you delete a function the associated resource policy is also
-- deleted. You will need to delete the event source mappings explicitly.
--
-- For information about function versioning, see
-- <http://docs.aws.amazon.com/lambda/latest/dg/versioning-aliases-v2.html AWS Lambda Function Versioning and Aliases>.
--
-- This operation requires permission for the 'lambda:DeleteFunction'
-- action.
--
-- /See:/ <http://docs.aws.amazon.com/lambda/latest/dg/API_DeleteFunction.html AWS API Reference> for DeleteFunction.
module Network.AWS.Lambda.DeleteFunction
    (
    -- * Creating a Request
      deleteFunction
    , DeleteFunction
    -- * Request Lenses
    , dfQualifier
    , dfFunctionName

    -- * Destructuring the Response
    , deleteFunctionResponse
    , DeleteFunctionResponse
    ) where

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

-- | /See:/ 'deleteFunction' smart constructor.
data DeleteFunction = DeleteFunction'
    { _dfQualifier    :: !(Maybe Text)
    , _dfFunctionName :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DeleteFunction' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dfQualifier'
--
-- * 'dfFunctionName'
deleteFunction
    :: Text -- ^ 'dfFunctionName'
    -> DeleteFunction
deleteFunction pFunctionName_ =
    DeleteFunction'
    { _dfQualifier = Nothing
    , _dfFunctionName = pFunctionName_
    }

-- | Using this optional parameter you can specify a function version (but
-- not the $LATEST version) to direct AWS Lambda to delete a specific
-- function version. If the function version has one or more aliases
-- pointing to it, you will get an error because you cannot have aliases
-- pointing to it. You can delete any function version but not the $LATEST,
-- that is, you cannot specify $LATEST as the value of this parameter. The
-- $LATEST version can be deleted only when you want to delete all the
-- function versions and aliases.
--
-- You can only specify a function version and not alias name using this
-- parameter. You cannot delete a function version using its alias.
--
-- If you don\'t specify this parameter, AWS Lambda will delete the
-- function, including all its versions and aliases.
dfQualifier :: Lens' DeleteFunction (Maybe Text)
dfQualifier = lens _dfQualifier (\ s a -> s{_dfQualifier = a});

-- | The Lambda function to delete.
--
-- You can specify an unqualified function name (for example,
-- \"Thumbnail\") or you can specify Amazon Resource Name (ARN) of the
-- function (for example,
-- \"arn:aws:lambda:us-west-2:account-id:function:ThumbNail\"). AWS Lambda
-- also allows you to specify only the account ID qualifier (for example,
-- \"account-id:Thumbnail\"). Note that the length constraint applies only
-- to the ARN. If you specify only the function name, it is limited to 64
-- character in length.
dfFunctionName :: Lens' DeleteFunction Text
dfFunctionName = lens _dfFunctionName (\ s a -> s{_dfFunctionName = a});

instance AWSRequest DeleteFunction where
        type Rs DeleteFunction = DeleteFunctionResponse
        request = delete lambda
        response = receiveNull DeleteFunctionResponse'

instance ToHeaders DeleteFunction where
        toHeaders = const mempty

instance ToPath DeleteFunction where
        toPath DeleteFunction'{..}
          = mconcat
              ["/2015-03-31/functions/", toBS _dfFunctionName]

instance ToQuery DeleteFunction where
        toQuery DeleteFunction'{..}
          = mconcat ["Qualifier" =: _dfQualifier]

-- | /See:/ 'deleteFunctionResponse' smart constructor.
data DeleteFunctionResponse =
    DeleteFunctionResponse'
    deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DeleteFunctionResponse' with the minimum fields required to make a request.
--
deleteFunctionResponse
    :: DeleteFunctionResponse
deleteFunctionResponse = DeleteFunctionResponse'