{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Amazonka.KinesisAnalytics.ListApplications
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- This documentation is for version 1 of the Amazon Kinesis Data Analytics
-- API, which only supports SQL applications. Version 2 of the API supports
-- SQL and Java applications. For more information about version 2, see
-- </kinesisanalytics/latest/apiv2/Welcome.html Amazon Kinesis Data Analytics API V2 Documentation>.
--
-- Returns a list of Amazon Kinesis Analytics applications in your account.
-- For each application, the response includes the application name, Amazon
-- Resource Name (ARN), and status. If the response returns the
-- @HasMoreApplications@ value as true, you can send another request by
-- adding the @ExclusiveStartApplicationName@ in the request body, and set
-- the value of this to the last application name from the previous
-- response.
--
-- If you want detailed information about a specific application, use
-- <https://docs.aws.amazon.com/kinesisanalytics/latest/dev/API_DescribeApplication.html DescribeApplication>.
--
-- This operation requires permissions to perform the
-- @kinesisanalytics:ListApplications@ action.
module Amazonka.KinesisAnalytics.ListApplications
  ( -- * Creating a Request
    ListApplications (..),
    newListApplications,

    -- * Request Lenses
    listApplications_exclusiveStartApplicationName,
    listApplications_limit,

    -- * Destructuring the Response
    ListApplicationsResponse (..),
    newListApplicationsResponse,

    -- * Response Lenses
    listApplicationsResponse_httpStatus,
    listApplicationsResponse_applicationSummaries,
    listApplicationsResponse_hasMoreApplications,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.KinesisAnalytics.Types
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- |
--
-- /See:/ 'newListApplications' smart constructor.
data ListApplications = ListApplications'
  { -- | Name of the application to start the list with. When using pagination to
    -- retrieve the list, you don\'t need to specify this parameter in the
    -- first request. However, in subsequent requests, you add the last
    -- application name from the previous response to get the next page of
    -- applications.
    exclusiveStartApplicationName :: Prelude.Maybe Prelude.Text,
    -- | Maximum number of applications to list.
    limit :: Prelude.Maybe Prelude.Natural
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListApplications' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'exclusiveStartApplicationName', 'listApplications_exclusiveStartApplicationName' - Name of the application to start the list with. When using pagination to
-- retrieve the list, you don\'t need to specify this parameter in the
-- first request. However, in subsequent requests, you add the last
-- application name from the previous response to get the next page of
-- applications.
--
-- 'limit', 'listApplications_limit' - Maximum number of applications to list.
newListApplications ::
  ListApplications
newListApplications =
  ListApplications'
    { exclusiveStartApplicationName =
        Prelude.Nothing,
      limit = Prelude.Nothing
    }

-- | Name of the application to start the list with. When using pagination to
-- retrieve the list, you don\'t need to specify this parameter in the
-- first request. However, in subsequent requests, you add the last
-- application name from the previous response to get the next page of
-- applications.
listApplications_exclusiveStartApplicationName :: Lens.Lens' ListApplications (Prelude.Maybe Prelude.Text)
listApplications_exclusiveStartApplicationName = Lens.lens (\ListApplications' {exclusiveStartApplicationName} -> exclusiveStartApplicationName) (\s@ListApplications' {} a -> s {exclusiveStartApplicationName = a} :: ListApplications)

-- | Maximum number of applications to list.
listApplications_limit :: Lens.Lens' ListApplications (Prelude.Maybe Prelude.Natural)
listApplications_limit = Lens.lens (\ListApplications' {limit} -> limit) (\s@ListApplications' {} a -> s {limit = a} :: ListApplications)

instance Core.AWSRequest ListApplications where
  type
    AWSResponse ListApplications =
      ListApplicationsResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          ListApplicationsResponse'
            Prelude.<$> (Prelude.pure (Prelude.fromEnum s))
            Prelude.<*> ( x
                            Data..?> "ApplicationSummaries"
                            Core..!@ Prelude.mempty
                        )
            Prelude.<*> (x Data..:> "HasMoreApplications")
      )

instance Prelude.Hashable ListApplications where
  hashWithSalt _salt ListApplications' {..} =
    _salt
      `Prelude.hashWithSalt` exclusiveStartApplicationName
      `Prelude.hashWithSalt` limit

instance Prelude.NFData ListApplications where
  rnf ListApplications' {..} =
    Prelude.rnf exclusiveStartApplicationName
      `Prelude.seq` Prelude.rnf limit

instance Data.ToHeaders ListApplications where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "X-Amz-Target"
              Data.=# ( "KinesisAnalytics_20150814.ListApplications" ::
                          Prelude.ByteString
                      ),
            "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON ListApplications where
  toJSON ListApplications' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("ExclusiveStartApplicationName" Data..=)
              Prelude.<$> exclusiveStartApplicationName,
            ("Limit" Data..=) Prelude.<$> limit
          ]
      )

instance Data.ToPath ListApplications where
  toPath = Prelude.const "/"

instance Data.ToQuery ListApplications where
  toQuery = Prelude.const Prelude.mempty

-- |
--
-- /See:/ 'newListApplicationsResponse' smart constructor.
data ListApplicationsResponse = ListApplicationsResponse'
  { -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | List of @ApplicationSummary@ objects.
    applicationSummaries :: [ApplicationSummary],
    -- | Returns true if there are more applications to retrieve.
    hasMoreApplications :: Prelude.Bool
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListApplicationsResponse' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'httpStatus', 'listApplicationsResponse_httpStatus' - The response's http status code.
--
-- 'applicationSummaries', 'listApplicationsResponse_applicationSummaries' - List of @ApplicationSummary@ objects.
--
-- 'hasMoreApplications', 'listApplicationsResponse_hasMoreApplications' - Returns true if there are more applications to retrieve.
newListApplicationsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  -- | 'hasMoreApplications'
  Prelude.Bool ->
  ListApplicationsResponse
newListApplicationsResponse
  pHttpStatus_
  pHasMoreApplications_ =
    ListApplicationsResponse'
      { httpStatus =
          pHttpStatus_,
        applicationSummaries = Prelude.mempty,
        hasMoreApplications = pHasMoreApplications_
      }

-- | The response's http status code.
listApplicationsResponse_httpStatus :: Lens.Lens' ListApplicationsResponse Prelude.Int
listApplicationsResponse_httpStatus = Lens.lens (\ListApplicationsResponse' {httpStatus} -> httpStatus) (\s@ListApplicationsResponse' {} a -> s {httpStatus = a} :: ListApplicationsResponse)

-- | List of @ApplicationSummary@ objects.
listApplicationsResponse_applicationSummaries :: Lens.Lens' ListApplicationsResponse [ApplicationSummary]
listApplicationsResponse_applicationSummaries = Lens.lens (\ListApplicationsResponse' {applicationSummaries} -> applicationSummaries) (\s@ListApplicationsResponse' {} a -> s {applicationSummaries = a} :: ListApplicationsResponse) Prelude.. Lens.coerced

-- | Returns true if there are more applications to retrieve.
listApplicationsResponse_hasMoreApplications :: Lens.Lens' ListApplicationsResponse Prelude.Bool
listApplicationsResponse_hasMoreApplications = Lens.lens (\ListApplicationsResponse' {hasMoreApplications} -> hasMoreApplications) (\s@ListApplicationsResponse' {} a -> s {hasMoreApplications = a} :: ListApplicationsResponse)

instance Prelude.NFData ListApplicationsResponse where
  rnf ListApplicationsResponse' {..} =
    Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf applicationSummaries
      `Prelude.seq` Prelude.rnf hasMoreApplications