{-# 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.Amplify.ListApps
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns a list of the existing Amplify apps.
--
-- This operation returns paginated results.
module Amazonka.Amplify.ListApps
  ( -- * Creating a Request
    ListApps (..),
    newListApps,

    -- * Request Lenses
    listApps_maxResults,
    listApps_nextToken,

    -- * Destructuring the Response
    ListAppsResponse (..),
    newListAppsResponse,

    -- * Response Lenses
    listAppsResponse_nextToken,
    listAppsResponse_httpStatus,
    listAppsResponse_apps,
  )
where

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

-- | The request structure for the list apps request.
--
-- /See:/ 'newListApps' smart constructor.
data ListApps = ListApps'
  { -- | The maximum number of records to list in a single response.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | A pagination token. If non-null, the pagination token is returned in a
    -- result. Pass its value in another request to retrieve more entries.
    nextToken :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListApps' 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:
--
-- 'maxResults', 'listApps_maxResults' - The maximum number of records to list in a single response.
--
-- 'nextToken', 'listApps_nextToken' - A pagination token. If non-null, the pagination token is returned in a
-- result. Pass its value in another request to retrieve more entries.
newListApps ::
  ListApps
newListApps =
  ListApps'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing
    }

-- | The maximum number of records to list in a single response.
listApps_maxResults :: Lens.Lens' ListApps (Prelude.Maybe Prelude.Natural)
listApps_maxResults = Lens.lens (\ListApps' {maxResults} -> maxResults) (\s@ListApps' {} a -> s {maxResults = a} :: ListApps)

-- | A pagination token. If non-null, the pagination token is returned in a
-- result. Pass its value in another request to retrieve more entries.
listApps_nextToken :: Lens.Lens' ListApps (Prelude.Maybe Prelude.Text)
listApps_nextToken = Lens.lens (\ListApps' {nextToken} -> nextToken) (\s@ListApps' {} a -> s {nextToken = a} :: ListApps)

instance Core.AWSPager ListApps where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listAppsResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop (rs Lens.^. listAppsResponse_apps) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listApps_nextToken
          Lens..~ rs
          Lens.^? listAppsResponse_nextToken
          Prelude.. Lens._Just

instance Core.AWSRequest ListApps where
  type AWSResponse ListApps = ListAppsResponse
  request overrides =
    Request.get (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          ListAppsResponse'
            Prelude.<$> (x Data..?> "nextToken")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
            Prelude.<*> (x Data..?> "apps" Core..!@ Prelude.mempty)
      )

instance Prelude.Hashable ListApps where
  hashWithSalt _salt ListApps' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken

instance Prelude.NFData ListApps where
  rnf ListApps' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken

instance Data.ToHeaders ListApps where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToPath ListApps where
  toPath = Prelude.const "/apps"

instance Data.ToQuery ListApps where
  toQuery ListApps' {..} =
    Prelude.mconcat
      [ "maxResults" Data.=: maxResults,
        "nextToken" Data.=: nextToken
      ]

-- | The result structure for an Amplify app list request.
--
-- /See:/ 'newListAppsResponse' smart constructor.
data ListAppsResponse = ListAppsResponse'
  { -- | A pagination token. Set to null to start listing apps from start. If
    -- non-null, the pagination token is returned in a result. Pass its value
    -- in here to list more projects.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | A list of Amplify apps.
    apps :: [App]
  }
  deriving (Prelude.Eq, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListAppsResponse' 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:
--
-- 'nextToken', 'listAppsResponse_nextToken' - A pagination token. Set to null to start listing apps from start. If
-- non-null, the pagination token is returned in a result. Pass its value
-- in here to list more projects.
--
-- 'httpStatus', 'listAppsResponse_httpStatus' - The response's http status code.
--
-- 'apps', 'listAppsResponse_apps' - A list of Amplify apps.
newListAppsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListAppsResponse
newListAppsResponse pHttpStatus_ =
  ListAppsResponse'
    { nextToken = Prelude.Nothing,
      httpStatus = pHttpStatus_,
      apps = Prelude.mempty
    }

-- | A pagination token. Set to null to start listing apps from start. If
-- non-null, the pagination token is returned in a result. Pass its value
-- in here to list more projects.
listAppsResponse_nextToken :: Lens.Lens' ListAppsResponse (Prelude.Maybe Prelude.Text)
listAppsResponse_nextToken = Lens.lens (\ListAppsResponse' {nextToken} -> nextToken) (\s@ListAppsResponse' {} a -> s {nextToken = a} :: ListAppsResponse)

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

-- | A list of Amplify apps.
listAppsResponse_apps :: Lens.Lens' ListAppsResponse [App]
listAppsResponse_apps = Lens.lens (\ListAppsResponse' {apps} -> apps) (\s@ListAppsResponse' {} a -> s {apps = a} :: ListAppsResponse) Prelude.. Lens.coerced

instance Prelude.NFData ListAppsResponse where
  rnf ListAppsResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf apps