{-# 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.ECR.DescribeRepositories
-- 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)
--
-- Describes image repositories in a registry.
module Network.AWS.ECR.DescribeRepositories
    (
    -- * Creating a Request
      describeRepositories
    , DescribeRepositories
    -- * Request Lenses
    , drRegistryId
    , drRepositoryNames
    , drNextToken
    , drMaxResults

    -- * Destructuring the Response
    , describeRepositoriesResponse
    , DescribeRepositoriesResponse
    -- * Response Lenses
    , drrsRepositories
    , drrsNextToken
    , drrsResponseStatus
    ) where

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

-- | /See:/ 'describeRepositories' smart constructor.
data DescribeRepositories = DescribeRepositories'
    { _drRegistryId      :: !(Maybe Text)
    , _drRepositoryNames :: !(Maybe (List1 Text))
    , _drNextToken       :: !(Maybe Text)
    , _drMaxResults      :: !(Maybe Nat)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeRepositories' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drRegistryId'
--
-- * 'drRepositoryNames'
--
-- * 'drNextToken'
--
-- * 'drMaxResults'
describeRepositories
    :: DescribeRepositories
describeRepositories =
    DescribeRepositories'
    { _drRegistryId = Nothing
    , _drRepositoryNames = Nothing
    , _drNextToken = Nothing
    , _drMaxResults = Nothing
    }

-- | The AWS account ID associated with the registry that contains the
-- repositories to be described. If you do not specify a registry, the
-- default registry is assumed.
drRegistryId :: Lens' DescribeRepositories (Maybe Text)
drRegistryId = lens _drRegistryId (\ s a -> s{_drRegistryId = a});

-- | A list of repositories to describe. If this parameter is omitted, then
-- all repositories in a registry are described.
drRepositoryNames :: Lens' DescribeRepositories (Maybe (NonEmpty Text))
drRepositoryNames = lens _drRepositoryNames (\ s a -> s{_drRepositoryNames = a}) . mapping _List1;

-- | The 'nextToken' value returned from a previous paginated
-- 'DescribeRepositories' request where 'maxResults' was used and the
-- results exceeded the value of that parameter. Pagination continues from
-- the end of the previous results that returned the 'nextToken' value.
-- This value is 'null' when there are no more results to return.
drNextToken :: Lens' DescribeRepositories (Maybe Text)
drNextToken = lens _drNextToken (\ s a -> s{_drNextToken = a});

-- | The maximum number of repository results returned by
-- 'DescribeRepositories' in paginated output. When this parameter is used,
-- 'DescribeRepositories' only returns 'maxResults' results in a single
-- page along with a 'nextToken' response element. The remaining results of
-- the initial request can be seen by sending another
-- 'DescribeRepositories' request with the returned 'nextToken' value. This
-- value can be between 1 and 100. If this parameter is not used, then
-- 'DescribeRepositories' returns up to 100 results and a 'nextToken'
-- value, if applicable.
drMaxResults :: Lens' DescribeRepositories (Maybe Natural)
drMaxResults = lens _drMaxResults (\ s a -> s{_drMaxResults = a}) . mapping _Nat;

instance AWSRequest DescribeRepositories where
        type Rs DescribeRepositories =
             DescribeRepositoriesResponse
        request = postJSON ecr
        response
          = receiveJSON
              (\ s h x ->
                 DescribeRepositoriesResponse' <$>
                   (x .?> "repositories" .!@ mempty) <*>
                     (x .?> "nextToken")
                     <*> (pure (fromEnum s)))

instance Hashable DescribeRepositories

instance NFData DescribeRepositories

instance ToHeaders DescribeRepositories where
        toHeaders
          = const
              (mconcat
                 ["X-Amz-Target" =#
                    ("AmazonEC2ContainerRegistry_V20150921.DescribeRepositories"
                       :: ByteString),
                  "Content-Type" =#
                    ("application/x-amz-json-1.1" :: ByteString)])

instance ToJSON DescribeRepositories where
        toJSON DescribeRepositories'{..}
          = object
              (catMaybes
                 [("registryId" .=) <$> _drRegistryId,
                  ("repositoryNames" .=) <$> _drRepositoryNames,
                  ("nextToken" .=) <$> _drNextToken,
                  ("maxResults" .=) <$> _drMaxResults])

instance ToPath DescribeRepositories where
        toPath = const "/"

instance ToQuery DescribeRepositories where
        toQuery = const mempty

-- | /See:/ 'describeRepositoriesResponse' smart constructor.
data DescribeRepositoriesResponse = DescribeRepositoriesResponse'
    { _drrsRepositories   :: !(Maybe [Repository])
    , _drrsNextToken      :: !(Maybe Text)
    , _drrsResponseStatus :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeRepositoriesResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'drrsRepositories'
--
-- * 'drrsNextToken'
--
-- * 'drrsResponseStatus'
describeRepositoriesResponse
    :: Int -- ^ 'drrsResponseStatus'
    -> DescribeRepositoriesResponse
describeRepositoriesResponse pResponseStatus_ =
    DescribeRepositoriesResponse'
    { _drrsRepositories = Nothing
    , _drrsNextToken = Nothing
    , _drrsResponseStatus = pResponseStatus_
    }

-- | A list of repository objects corresponding to valid repositories.
drrsRepositories :: Lens' DescribeRepositoriesResponse [Repository]
drrsRepositories = lens _drrsRepositories (\ s a -> s{_drrsRepositories = a}) . _Default . _Coerce;

-- | The 'nextToken' value to include in a future 'DescribeRepositories'
-- request. When the results of a 'DescribeRepositories' request exceed
-- 'maxResults', this value can be used to retrieve the next page of
-- results. This value is 'null' when there are no more results to return.
drrsNextToken :: Lens' DescribeRepositoriesResponse (Maybe Text)
drrsNextToken = lens _drrsNextToken (\ s a -> s{_drrsNextToken = a});

-- | The response status code.
drrsResponseStatus :: Lens' DescribeRepositoriesResponse Int
drrsResponseStatus = lens _drrsResponseStatus (\ s a -> s{_drrsResponseStatus = a});

instance NFData DescribeRepositoriesResponse