{-# LANGUAGE DataKinds                   #-}
{-# LANGUAGE DeriveGeneric               #-}
{-# LANGUAGE FlexibleInstances           #-}
{-# LANGUAGE GeneralizedNewtypeDeriving  #-}
{-# LANGUAGE LambdaCase                  #-}
{-# LANGUAGE NoImplicitPrelude           #-}
{-# LANGUAGE OverloadedStrings           #-}
{-# LANGUAGE RecordWildCards             #-}
{-# LANGUAGE TypeFamilies                #-}

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

-- Module      : Network.AWS.SWF.RecordActivityTaskHeartbeat
-- Copyright   : (c) 2013-2014 Brendan Hay <brendan.g.hay@gmail.com>
-- License     : This Source Code Form is subject to the terms of
--               the Mozilla Public License, v. 2.0.
--               A copy of the MPL can be found in the LICENSE file or
--               you can obtain it at http://mozilla.org/MPL/2.0/.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : experimental
-- Portability : non-portable (GHC extensions)

-- | Used by activity workers to report to the service that the ActivityTask
-- represented by the specified taskToken is still making progress. The worker
-- can also (optionally) specify details of the progress, for example percent
-- complete, using the details parameter. This action can also be used by the
-- worker as a mechanism to check if cancellation is being requested for the
-- activity task. If a cancellation is being attempted for the specified task,
-- then the boolean cancelRequested flag returned by the service is set to
-- true. This action resets the taskHeartbeatTimeout clock. The
-- taskHeartbeatTimeout is specified in RegisterActivityType. This action does
-- not in itself create an event in the workflow execution history. However,
-- if the task times out, the workflow execution history will contain a
-- ActivityTaskTimedOut event that contains the information from the last
-- heartbeat generated by the activity worker. If the cancelRequested flag
-- returns true, a cancellation is being attempted. If the worker can cancel
-- the activity, it should respond with RespondActivityTaskCanceled.
-- Otherwise, it should ignore the cancellation request. Access Control You
-- can use IAM policies to control this action's access to Amazon SWF
-- resources as follows: Use a Resource element with the domain name to limit
-- the action to only specified domains. Use an Action element to allow or
-- deny permission to call this action. You cannot use an IAM policy to
-- constrain this action's parameters. If the caller does not have sufficient
-- permissions to invoke the action, or the parameter values fall outside the
-- specified constraints, the action fails by throwing OperationNotPermitted.
-- For details and example IAM policies, see Using IAM to Manage Access to
-- Amazon SWF Workflows.
--
-- <http://docs.aws.amazon.com/amazonswf/latest/apireference/API_RecordActivityTaskHeartbeat.html>
module Network.AWS.SWF.RecordActivityTaskHeartbeat
    (
    -- * Request
      RecordActivityTaskHeartbeat
    -- ** Request constructor
    , recordActivityTaskHeartbeat
    -- ** Request lenses
    , rathDetails
    , rathTaskToken

    -- * Response
    , RecordActivityTaskHeartbeatResponse
    -- ** Response constructor
    , recordActivityTaskHeartbeatResponse
    -- ** Response lenses
    , rathrCancelRequested
    ) where

import Network.AWS.Prelude
import Network.AWS.Request.JSON
import Network.AWS.SWF.Types
import qualified GHC.Exts

data RecordActivityTaskHeartbeat = RecordActivityTaskHeartbeat
    { _rathDetails   :: Maybe Text
    , _rathTaskToken :: Text
    } deriving (Eq, Ord, Show)

-- | 'RecordActivityTaskHeartbeat' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'rathDetails' @::@ 'Maybe' 'Text'
--
-- * 'rathTaskToken' @::@ 'Text'
--
recordActivityTaskHeartbeat :: Text -- ^ 'rathTaskToken'
                            -> RecordActivityTaskHeartbeat
recordActivityTaskHeartbeat p1 = RecordActivityTaskHeartbeat
    { _rathTaskToken = p1
    , _rathDetails   = Nothing
    }

-- | If specified, contains details about the progress of the task.
rathDetails :: Lens' RecordActivityTaskHeartbeat (Maybe Text)
rathDetails = lens _rathDetails (\s a -> s { _rathDetails = a })

-- | The taskToken of the ActivityTask. The taskToken is generated by the
-- service and should be treated as an opaque value. If the task is passed
-- to another process, its taskToken must also be passed. This enables it to
-- provide its progress and respond with results.
rathTaskToken :: Lens' RecordActivityTaskHeartbeat Text
rathTaskToken = lens _rathTaskToken (\s a -> s { _rathTaskToken = a })

newtype RecordActivityTaskHeartbeatResponse = RecordActivityTaskHeartbeatResponse
    { _rathrCancelRequested :: Bool
    } deriving (Eq, Ord, Show, Enum)

-- | 'RecordActivityTaskHeartbeatResponse' constructor.
--
-- The fields accessible through corresponding lenses are:
--
-- * 'rathrCancelRequested' @::@ 'Bool'
--
recordActivityTaskHeartbeatResponse :: Bool -- ^ 'rathrCancelRequested'
                                    -> RecordActivityTaskHeartbeatResponse
recordActivityTaskHeartbeatResponse p1 = RecordActivityTaskHeartbeatResponse
    { _rathrCancelRequested = p1
    }

-- | Set to true if cancellation of the task is requested.
rathrCancelRequested :: Lens' RecordActivityTaskHeartbeatResponse Bool
rathrCancelRequested =
    lens _rathrCancelRequested (\s a -> s { _rathrCancelRequested = a })

instance ToPath RecordActivityTaskHeartbeat where
    toPath = const "/"

instance ToQuery RecordActivityTaskHeartbeat where
    toQuery = const mempty

instance ToHeaders RecordActivityTaskHeartbeat

instance ToJSON RecordActivityTaskHeartbeat where
    toJSON RecordActivityTaskHeartbeat{..} = object
        [ "taskToken" .= _rathTaskToken
        , "details"   .= _rathDetails
        ]

instance AWSRequest RecordActivityTaskHeartbeat where
    type Sv RecordActivityTaskHeartbeat = SWF
    type Rs RecordActivityTaskHeartbeat = RecordActivityTaskHeartbeatResponse

    request  = post "RecordActivityTaskHeartbeat"
    response = jsonResponse

instance FromJSON RecordActivityTaskHeartbeatResponse where
    parseJSON = withObject "RecordActivityTaskHeartbeatResponse" $ \o -> RecordActivityTaskHeartbeatResponse
        <$> o .:  "cancelRequested"