{-# 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.DynamoDB.UpdateTable
-- 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)
--
-- Modifies the provisioned throughput settings, global secondary indexes,
-- or DynamoDB Streams settings for a given table.
--
-- You can only perform one of the following operations at once:
--
-- -   Modify the provisioned throughput settings of the table.
--
-- -   Enable or disable Streams on the table.
--
-- -   Remove a global secondary index from the table.
--
-- -   Create a new global secondary index on the table. Once the index
--     begins backfilling, you can use /UpdateTable/ to perform other
--     operations.
--
-- /UpdateTable/ is an asynchronous operation; while it is executing, the
-- table status changes from 'ACTIVE' to 'UPDATING'. While it is
-- 'UPDATING', you cannot issue another /UpdateTable/ request. When the
-- table returns to the 'ACTIVE' state, the /UpdateTable/ operation is
-- complete.
--
-- /See:/ <http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_UpdateTable.html AWS API Reference> for UpdateTable.
module Network.AWS.DynamoDB.UpdateTable
    (
    -- * Creating a Request
      updateTable
    , UpdateTable
    -- * Request Lenses
    , utAttributeDefinitions
    , utProvisionedThroughput
    , utGlobalSecondaryIndexUpdates
    , utStreamSpecification
    , utTableName

    -- * Destructuring the Response
    , updateTableResponse
    , UpdateTableResponse
    -- * Response Lenses
    , utrsTableDescription
    , utrsResponseStatus
    ) where

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

-- | Represents the input of an /UpdateTable/ operation.
--
-- /See:/ 'updateTable' smart constructor.
data UpdateTable = UpdateTable'
    { _utAttributeDefinitions        :: !(Maybe [AttributeDefinition])
    , _utProvisionedThroughput       :: !(Maybe ProvisionedThroughput)
    , _utGlobalSecondaryIndexUpdates :: !(Maybe [GlobalSecondaryIndexUpdate])
    , _utStreamSpecification         :: !(Maybe StreamSpecification)
    , _utTableName                   :: !Text
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'UpdateTable' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'utAttributeDefinitions'
--
-- * 'utProvisionedThroughput'
--
-- * 'utGlobalSecondaryIndexUpdates'
--
-- * 'utStreamSpecification'
--
-- * 'utTableName'
updateTable
    :: Text -- ^ 'utTableName'
    -> UpdateTable
updateTable pTableName_ =
    UpdateTable'
    { _utAttributeDefinitions = Nothing
    , _utProvisionedThroughput = Nothing
    , _utGlobalSecondaryIndexUpdates = Nothing
    , _utStreamSpecification = Nothing
    , _utTableName = pTableName_
    }

-- | An array of attributes that describe the key schema for the table and
-- indexes. If you are adding a new global secondary index to the table,
-- /AttributeDefinitions/ must include the key element(s) of the new index.
utAttributeDefinitions :: Lens' UpdateTable [AttributeDefinition]
utAttributeDefinitions = lens _utAttributeDefinitions (\ s a -> s{_utAttributeDefinitions = a}) . _Default . _Coerce;

-- | Undocumented member.
utProvisionedThroughput :: Lens' UpdateTable (Maybe ProvisionedThroughput)
utProvisionedThroughput = lens _utProvisionedThroughput (\ s a -> s{_utProvisionedThroughput = a});

-- | An array of one or more global secondary indexes for the table. For each
-- index in the array, you can request one action:
--
-- -   /Create/ - add a new global secondary index to the table.
--
-- -   /Update/ - modify the provisioned throughput settings of an existing
--     global secondary index.
--
-- -   /Delete/ - remove a global secondary index from the table.
--
-- For more information, see
-- <http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/GSI.OnlineOps.html Managing Global Secondary Indexes>
-- in the /Amazon DynamoDB Developer Guide/.
utGlobalSecondaryIndexUpdates :: Lens' UpdateTable [GlobalSecondaryIndexUpdate]
utGlobalSecondaryIndexUpdates = lens _utGlobalSecondaryIndexUpdates (\ s a -> s{_utGlobalSecondaryIndexUpdates = a}) . _Default . _Coerce;

-- | Represents the DynamoDB Streams configuration for the table.
--
-- You will receive a /ResourceInUseException/ if you attempt to enable a
-- stream on a table that already has a stream, or if you attempt to
-- disable a stream on a table which does not have a stream.
utStreamSpecification :: Lens' UpdateTable (Maybe StreamSpecification)
utStreamSpecification = lens _utStreamSpecification (\ s a -> s{_utStreamSpecification = a});

-- | The name of the table to be updated.
utTableName :: Lens' UpdateTable Text
utTableName = lens _utTableName (\ s a -> s{_utTableName = a});

instance AWSRequest UpdateTable where
        type Rs UpdateTable = UpdateTableResponse
        request = postJSON dynamoDB
        response
          = receiveJSON
              (\ s h x ->
                 UpdateTableResponse' <$>
                   (x .?> "TableDescription") <*> (pure (fromEnum s)))

instance ToHeaders UpdateTable where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("DynamoDB_20120810.UpdateTable" :: ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.0" :: ByteString)])

instance ToJSON UpdateTable where
        toJSON UpdateTable'{..}
          = object
              (catMaybes
                 [("AttributeDefinitions" .=) <$>
                    _utAttributeDefinitions,
                  ("ProvisionedThroughput" .=) <$>
                    _utProvisionedThroughput,
                  ("GlobalSecondaryIndexUpdates" .=) <$>
                    _utGlobalSecondaryIndexUpdates,
                  ("StreamSpecification" .=) <$>
                    _utStreamSpecification,
                  Just ("TableName" .= _utTableName)])

instance ToPath UpdateTable where
        toPath = const "/"

instance ToQuery UpdateTable where
        toQuery = const mempty

-- | Represents the output of an /UpdateTable/ operation.
--
-- /See:/ 'updateTableResponse' smart constructor.
data UpdateTableResponse = UpdateTableResponse'
    { _utrsTableDescription :: !(Maybe TableDescription)
    , _utrsResponseStatus   :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'UpdateTableResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'utrsTableDescription'
--
-- * 'utrsResponseStatus'
updateTableResponse
    :: Int -- ^ 'utrsResponseStatus'
    -> UpdateTableResponse
updateTableResponse pResponseStatus_ =
    UpdateTableResponse'
    { _utrsTableDescription = Nothing
    , _utrsResponseStatus = pResponseStatus_
    }

-- | Undocumented member.
utrsTableDescription :: Lens' UpdateTableResponse (Maybe TableDescription)
utrsTableDescription = lens _utrsTableDescription (\ s a -> s{_utrsTableDescription = a});

-- | The response status code.
utrsResponseStatus :: Lens' UpdateTableResponse Int
utrsResponseStatus = lens _utrsResponseStatus (\ s a -> s{_utrsResponseStatus = a});