{-# 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.SWF.RespondDecisionTaskCompleted
-- 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)
--
-- Used by deciders to tell the service that the DecisionTask identified by
-- the 'taskToken' has successfully completed. The 'decisions' argument
-- specifies the list of decisions made while processing the task.
--
-- A 'DecisionTaskCompleted' event is added to the workflow history. The
-- 'executionContext' specified is attached to the event in the workflow
-- execution history.
--
-- __Access Control__
--
-- If an IAM policy grants permission to use
-- 'RespondDecisionTaskCompleted', it can express permissions for the list
-- of decisions in the 'decisions' parameter. Each of the decisions has one
-- or more parameters, much like a regular API call. To allow for policies
-- to be as readable as possible, you can express permissions on decisions
-- as if they were actual API calls, including applying conditions to some
-- parameters. For more information, see
-- <http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html Using IAM to Manage Access to Amazon SWF Workflows>.
--
-- /See:/ <http://docs.aws.amazon.com/amazonswf/latest/apireference/API_RespondDecisionTaskCompleted.html AWS API Reference> for RespondDecisionTaskCompleted.
module Network.AWS.SWF.RespondDecisionTaskCompleted
    (
    -- * Creating a Request
      respondDecisionTaskCompleted
    , RespondDecisionTaskCompleted
    -- * Request Lenses
    , rdtcDecisions
    , rdtcExecutionContext
    , rdtcTaskToken

    -- * Destructuring the Response
    , respondDecisionTaskCompletedResponse
    , RespondDecisionTaskCompletedResponse
    ) where

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

-- | /See:/ 'respondDecisionTaskCompleted' smart constructor.
data RespondDecisionTaskCompleted = RespondDecisionTaskCompleted'
    { _rdtcDecisions        :: !(Maybe [Decision])
    , _rdtcExecutionContext :: !(Maybe Text)
    , _rdtcTaskToken        :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'RespondDecisionTaskCompleted' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'rdtcDecisions'
--
-- * 'rdtcExecutionContext'
--
-- * 'rdtcTaskToken'
respondDecisionTaskCompleted
    :: Text -- ^ 'rdtcTaskToken'
    -> RespondDecisionTaskCompleted
respondDecisionTaskCompleted pTaskToken_ =
    RespondDecisionTaskCompleted'
    { _rdtcDecisions = Nothing
    , _rdtcExecutionContext = Nothing
    , _rdtcTaskToken = pTaskToken_
    }

-- | The list of decisions (possibly empty) made by the decider while
-- processing this decision task. See the docs for the decision structure
-- for details.
rdtcDecisions :: Lens' RespondDecisionTaskCompleted [Decision]
rdtcDecisions = lens _rdtcDecisions (\ s a -> s{_rdtcDecisions = a}) . _Default . _Coerce;

-- | User defined context to add to workflow execution.
rdtcExecutionContext :: Lens' RespondDecisionTaskCompleted (Maybe Text)
rdtcExecutionContext = lens _rdtcExecutionContext (\ s a -> s{_rdtcExecutionContext = a});

-- | The 'taskToken' from the DecisionTask.
--
-- '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.
rdtcTaskToken :: Lens' RespondDecisionTaskCompleted Text
rdtcTaskToken = lens _rdtcTaskToken (\ s a -> s{_rdtcTaskToken = a});

instance AWSRequest RespondDecisionTaskCompleted
         where
        type Sv RespondDecisionTaskCompleted = SWF
        type Rs RespondDecisionTaskCompleted =
             RespondDecisionTaskCompletedResponse
        request = postJSON
        response
          = receiveNull RespondDecisionTaskCompletedResponse'

instance ToHeaders RespondDecisionTaskCompleted where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("SimpleWorkflowService.RespondDecisionTaskCompleted"
                       :: ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.0" :: ByteString)])

instance ToJSON RespondDecisionTaskCompleted where
        toJSON RespondDecisionTaskCompleted'{..}
          = object
              ["decisions" .= _rdtcDecisions,
               "executionContext" .= _rdtcExecutionContext,
               "taskToken" .= _rdtcTaskToken]

instance ToPath RespondDecisionTaskCompleted where
        toPath = const "/"

instance ToQuery RespondDecisionTaskCompleted where
        toQuery = const mempty

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

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