{-# 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.IAM.GetGroup
-- 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 IAM users that are in the specified IAM group. You can
-- paginate the results using the @MaxItems@ and @Marker@ parameters.
--
-- This operation returns paginated results.
module Amazonka.IAM.GetGroup
  ( -- * Creating a Request
    GetGroup (..),
    newGetGroup,

    -- * Request Lenses
    getGroup_marker,
    getGroup_maxItems,
    getGroup_groupName,

    -- * Destructuring the Response
    GetGroupResponse (..),
    newGetGroupResponse,

    -- * Response Lenses
    getGroupResponse_isTruncated,
    getGroupResponse_marker,
    getGroupResponse_httpStatus,
    getGroupResponse_group,
    getGroupResponse_users,
  )
where

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

-- | /See:/ 'newGetGroup' smart constructor.
data GetGroup = GetGroup'
  { -- | Use this parameter only when paginating results and only after you
    -- receive a response indicating that the results are truncated. Set it to
    -- the value of the @Marker@ element in the response that you received to
    -- indicate where the next call should start.
    marker :: Prelude.Maybe Prelude.Text,
    -- | Use this only when paginating results to indicate the maximum number of
    -- items you want in the response. If additional items exist beyond the
    -- maximum you specify, the @IsTruncated@ response element is @true@.
    --
    -- If you do not include this parameter, the number of items defaults to
    -- 100. Note that IAM might return fewer results, even when there are more
    -- results available. In that case, the @IsTruncated@ response element
    -- returns @true@, and @Marker@ contains a value to include in the
    -- subsequent call that tells the service where to continue from.
    maxItems :: Prelude.Maybe Prelude.Natural,
    -- | The name of the group.
    --
    -- This parameter allows (through its
    -- <http://wikipedia.org/wiki/regex regex pattern>) a string of characters
    -- consisting of upper and lowercase alphanumeric characters with no
    -- spaces. You can also include any of the following characters: _+=,.\@-
    groupName :: Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetGroup' 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:
--
-- 'marker', 'getGroup_marker' - Use this parameter only when paginating results and only after you
-- receive a response indicating that the results are truncated. Set it to
-- the value of the @Marker@ element in the response that you received to
-- indicate where the next call should start.
--
-- 'maxItems', 'getGroup_maxItems' - Use this only when paginating results to indicate the maximum number of
-- items you want in the response. If additional items exist beyond the
-- maximum you specify, the @IsTruncated@ response element is @true@.
--
-- If you do not include this parameter, the number of items defaults to
-- 100. Note that IAM might return fewer results, even when there are more
-- results available. In that case, the @IsTruncated@ response element
-- returns @true@, and @Marker@ contains a value to include in the
-- subsequent call that tells the service where to continue from.
--
-- 'groupName', 'getGroup_groupName' - The name of the group.
--
-- This parameter allows (through its
-- <http://wikipedia.org/wiki/regex regex pattern>) a string of characters
-- consisting of upper and lowercase alphanumeric characters with no
-- spaces. You can also include any of the following characters: _+=,.\@-
newGetGroup ::
  -- | 'groupName'
  Prelude.Text ->
  GetGroup
newGetGroup pGroupName_ =
  GetGroup'
    { marker = Prelude.Nothing,
      maxItems = Prelude.Nothing,
      groupName = pGroupName_
    }

-- | Use this parameter only when paginating results and only after you
-- receive a response indicating that the results are truncated. Set it to
-- the value of the @Marker@ element in the response that you received to
-- indicate where the next call should start.
getGroup_marker :: Lens.Lens' GetGroup (Prelude.Maybe Prelude.Text)
getGroup_marker = Lens.lens (\GetGroup' {marker} -> marker) (\s@GetGroup' {} a -> s {marker = a} :: GetGroup)

-- | Use this only when paginating results to indicate the maximum number of
-- items you want in the response. If additional items exist beyond the
-- maximum you specify, the @IsTruncated@ response element is @true@.
--
-- If you do not include this parameter, the number of items defaults to
-- 100. Note that IAM might return fewer results, even when there are more
-- results available. In that case, the @IsTruncated@ response element
-- returns @true@, and @Marker@ contains a value to include in the
-- subsequent call that tells the service where to continue from.
getGroup_maxItems :: Lens.Lens' GetGroup (Prelude.Maybe Prelude.Natural)
getGroup_maxItems = Lens.lens (\GetGroup' {maxItems} -> maxItems) (\s@GetGroup' {} a -> s {maxItems = a} :: GetGroup)

-- | The name of the group.
--
-- This parameter allows (through its
-- <http://wikipedia.org/wiki/regex regex pattern>) a string of characters
-- consisting of upper and lowercase alphanumeric characters with no
-- spaces. You can also include any of the following characters: _+=,.\@-
getGroup_groupName :: Lens.Lens' GetGroup Prelude.Text
getGroup_groupName = Lens.lens (\GetGroup' {groupName} -> groupName) (\s@GetGroup' {} a -> s {groupName = a} :: GetGroup)

instance Core.AWSPager GetGroup where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? getGroupResponse_isTruncated
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.isNothing
        ( rs
            Lens.^? getGroupResponse_marker
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& getGroup_marker
          Lens..~ rs
          Lens.^? getGroupResponse_marker
          Prelude.. Lens._Just

instance Core.AWSRequest GetGroup where
  type AWSResponse GetGroup = GetGroupResponse
  request overrides =
    Request.postQuery (overrides defaultService)
  response =
    Response.receiveXMLWrapper
      "GetGroupResult"
      ( \s h x ->
          GetGroupResponse'
            Prelude.<$> (x Data..@? "IsTruncated")
            Prelude.<*> (x Data..@? "Marker")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
            Prelude.<*> (x Data..@ "Group")
            Prelude.<*> ( x
                            Data..@? "Users"
                            Core..!@ Prelude.mempty
                            Prelude.>>= Data.parseXMLList "member"
                        )
      )

instance Prelude.Hashable GetGroup where
  hashWithSalt _salt GetGroup' {..} =
    _salt
      `Prelude.hashWithSalt` marker
      `Prelude.hashWithSalt` maxItems
      `Prelude.hashWithSalt` groupName

instance Prelude.NFData GetGroup where
  rnf GetGroup' {..} =
    Prelude.rnf marker
      `Prelude.seq` Prelude.rnf maxItems
      `Prelude.seq` Prelude.rnf groupName

instance Data.ToHeaders GetGroup where
  toHeaders = Prelude.const Prelude.mempty

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

instance Data.ToQuery GetGroup where
  toQuery GetGroup' {..} =
    Prelude.mconcat
      [ "Action" Data.=: ("GetGroup" :: Prelude.ByteString),
        "Version"
          Data.=: ("2010-05-08" :: Prelude.ByteString),
        "Marker" Data.=: marker,
        "MaxItems" Data.=: maxItems,
        "GroupName" Data.=: groupName
      ]

-- | Contains the response to a successful GetGroup request.
--
-- /See:/ 'newGetGroupResponse' smart constructor.
data GetGroupResponse = GetGroupResponse'
  { -- | A flag that indicates whether there are more items to return. If your
    -- results were truncated, you can make a subsequent pagination request
    -- using the @Marker@ request parameter to retrieve more items. Note that
    -- IAM might return fewer than the @MaxItems@ number of results even when
    -- there are more results available. We recommend that you check
    -- @IsTruncated@ after every call to ensure that you receive all your
    -- results.
    isTruncated :: Prelude.Maybe Prelude.Bool,
    -- | When @IsTruncated@ is @true@, this element is present and contains the
    -- value to use for the @Marker@ parameter in a subsequent pagination
    -- request.
    marker :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | A structure that contains details about the group.
    group' :: Group,
    -- | A list of users in the group.
    users :: [User]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetGroupResponse' 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:
--
-- 'isTruncated', 'getGroupResponse_isTruncated' - A flag that indicates whether there are more items to return. If your
-- results were truncated, you can make a subsequent pagination request
-- using the @Marker@ request parameter to retrieve more items. Note that
-- IAM might return fewer than the @MaxItems@ number of results even when
-- there are more results available. We recommend that you check
-- @IsTruncated@ after every call to ensure that you receive all your
-- results.
--
-- 'marker', 'getGroupResponse_marker' - When @IsTruncated@ is @true@, this element is present and contains the
-- value to use for the @Marker@ parameter in a subsequent pagination
-- request.
--
-- 'httpStatus', 'getGroupResponse_httpStatus' - The response's http status code.
--
-- 'group'', 'getGroupResponse_group' - A structure that contains details about the group.
--
-- 'users', 'getGroupResponse_users' - A list of users in the group.
newGetGroupResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  -- | 'group''
  Group ->
  GetGroupResponse
newGetGroupResponse pHttpStatus_ pGroup_ =
  GetGroupResponse'
    { isTruncated = Prelude.Nothing,
      marker = Prelude.Nothing,
      httpStatus = pHttpStatus_,
      group' = pGroup_,
      users = Prelude.mempty
    }

-- | A flag that indicates whether there are more items to return. If your
-- results were truncated, you can make a subsequent pagination request
-- using the @Marker@ request parameter to retrieve more items. Note that
-- IAM might return fewer than the @MaxItems@ number of results even when
-- there are more results available. We recommend that you check
-- @IsTruncated@ after every call to ensure that you receive all your
-- results.
getGroupResponse_isTruncated :: Lens.Lens' GetGroupResponse (Prelude.Maybe Prelude.Bool)
getGroupResponse_isTruncated = Lens.lens (\GetGroupResponse' {isTruncated} -> isTruncated) (\s@GetGroupResponse' {} a -> s {isTruncated = a} :: GetGroupResponse)

-- | When @IsTruncated@ is @true@, this element is present and contains the
-- value to use for the @Marker@ parameter in a subsequent pagination
-- request.
getGroupResponse_marker :: Lens.Lens' GetGroupResponse (Prelude.Maybe Prelude.Text)
getGroupResponse_marker = Lens.lens (\GetGroupResponse' {marker} -> marker) (\s@GetGroupResponse' {} a -> s {marker = a} :: GetGroupResponse)

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

-- | A structure that contains details about the group.
getGroupResponse_group :: Lens.Lens' GetGroupResponse Group
getGroupResponse_group = Lens.lens (\GetGroupResponse' {group'} -> group') (\s@GetGroupResponse' {} a -> s {group' = a} :: GetGroupResponse)

-- | A list of users in the group.
getGroupResponse_users :: Lens.Lens' GetGroupResponse [User]
getGroupResponse_users = Lens.lens (\GetGroupResponse' {users} -> users) (\s@GetGroupResponse' {} a -> s {users = a} :: GetGroupResponse) Prelude.. Lens.coerced

instance Prelude.NFData GetGroupResponse where
  rnf GetGroupResponse' {..} =
    Prelude.rnf isTruncated
      `Prelude.seq` Prelude.rnf marker
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf group'
      `Prelude.seq` Prelude.rnf users