{-# 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.CloudDirectory.LookupPolicy
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Lists all policies from the root of the Directory to the object
-- specified. If there are no policies present, an empty list is returned.
-- If policies are present, and if some objects don\'t have the policies
-- attached, it returns the @ObjectIdentifier@ for such objects. If
-- policies are present, it returns @ObjectIdentifier@, @policyId@, and
-- @policyType@. Paths that don\'t lead to the root from the target object
-- are ignored. For more information, see
-- <https://docs.aws.amazon.com/clouddirectory/latest/developerguide/key_concepts_directory.html#key_concepts_policies Policies>.
--
-- This operation returns paginated results.
module Amazonka.CloudDirectory.LookupPolicy
  ( -- * Creating a Request
    LookupPolicy (..),
    newLookupPolicy,

    -- * Request Lenses
    lookupPolicy_maxResults,
    lookupPolicy_nextToken,
    lookupPolicy_directoryArn,
    lookupPolicy_objectReference,

    -- * Destructuring the Response
    LookupPolicyResponse (..),
    newLookupPolicyResponse,

    -- * Response Lenses
    lookupPolicyResponse_nextToken,
    lookupPolicyResponse_policyToPathList,
    lookupPolicyResponse_httpStatus,
  )
where

import Amazonka.CloudDirectory.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

-- | /See:/ 'newLookupPolicy' smart constructor.
data LookupPolicy = LookupPolicy'
  { -- | The maximum number of items to be retrieved in a single call. This is an
    -- approximate number.
    maxResults :: Prelude.Maybe Prelude.Natural,
    -- | The token to request the next page of results.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | The Amazon Resource Name (ARN) that is associated with the Directory.
    -- For more information, see arns.
    directoryArn :: Prelude.Text,
    -- | Reference that identifies the object whose policies will be looked up.
    objectReference :: ObjectReference
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'LookupPolicy' 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', 'lookupPolicy_maxResults' - The maximum number of items to be retrieved in a single call. This is an
-- approximate number.
--
-- 'nextToken', 'lookupPolicy_nextToken' - The token to request the next page of results.
--
-- 'directoryArn', 'lookupPolicy_directoryArn' - The Amazon Resource Name (ARN) that is associated with the Directory.
-- For more information, see arns.
--
-- 'objectReference', 'lookupPolicy_objectReference' - Reference that identifies the object whose policies will be looked up.
newLookupPolicy ::
  -- | 'directoryArn'
  Prelude.Text ->
  -- | 'objectReference'
  ObjectReference ->
  LookupPolicy
newLookupPolicy pDirectoryArn_ pObjectReference_ =
  LookupPolicy'
    { maxResults = Prelude.Nothing,
      nextToken = Prelude.Nothing,
      directoryArn = pDirectoryArn_,
      objectReference = pObjectReference_
    }

-- | The maximum number of items to be retrieved in a single call. This is an
-- approximate number.
lookupPolicy_maxResults :: Lens.Lens' LookupPolicy (Prelude.Maybe Prelude.Natural)
lookupPolicy_maxResults = Lens.lens (\LookupPolicy' {maxResults} -> maxResults) (\s@LookupPolicy' {} a -> s {maxResults = a} :: LookupPolicy)

-- | The token to request the next page of results.
lookupPolicy_nextToken :: Lens.Lens' LookupPolicy (Prelude.Maybe Prelude.Text)
lookupPolicy_nextToken = Lens.lens (\LookupPolicy' {nextToken} -> nextToken) (\s@LookupPolicy' {} a -> s {nextToken = a} :: LookupPolicy)

-- | The Amazon Resource Name (ARN) that is associated with the Directory.
-- For more information, see arns.
lookupPolicy_directoryArn :: Lens.Lens' LookupPolicy Prelude.Text
lookupPolicy_directoryArn = Lens.lens (\LookupPolicy' {directoryArn} -> directoryArn) (\s@LookupPolicy' {} a -> s {directoryArn = a} :: LookupPolicy)

-- | Reference that identifies the object whose policies will be looked up.
lookupPolicy_objectReference :: Lens.Lens' LookupPolicy ObjectReference
lookupPolicy_objectReference = Lens.lens (\LookupPolicy' {objectReference} -> objectReference) (\s@LookupPolicy' {} a -> s {objectReference = a} :: LookupPolicy)

instance Core.AWSPager LookupPolicy where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? lookupPolicyResponse_nextToken
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Core.stop
        ( rs
            Lens.^? lookupPolicyResponse_policyToPathList
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& lookupPolicy_nextToken
          Lens..~ rs
          Lens.^? lookupPolicyResponse_nextToken
          Prelude.. Lens._Just

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

instance Prelude.Hashable LookupPolicy where
  hashWithSalt _salt LookupPolicy' {..} =
    _salt
      `Prelude.hashWithSalt` maxResults
      `Prelude.hashWithSalt` nextToken
      `Prelude.hashWithSalt` directoryArn
      `Prelude.hashWithSalt` objectReference

instance Prelude.NFData LookupPolicy where
  rnf LookupPolicy' {..} =
    Prelude.rnf maxResults
      `Prelude.seq` Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf directoryArn
      `Prelude.seq` Prelude.rnf objectReference

instance Data.ToHeaders LookupPolicy where
  toHeaders LookupPolicy' {..} =
    Prelude.mconcat
      ["x-amz-data-partition" Data.=# directoryArn]

instance Data.ToJSON LookupPolicy where
  toJSON LookupPolicy' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("MaxResults" Data..=) Prelude.<$> maxResults,
            ("NextToken" Data..=) Prelude.<$> nextToken,
            Prelude.Just
              ("ObjectReference" Data..= objectReference)
          ]
      )

instance Data.ToPath LookupPolicy where
  toPath =
    Prelude.const
      "/amazonclouddirectory/2017-01-11/policy/lookup"

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

-- | /See:/ 'newLookupPolicyResponse' smart constructor.
data LookupPolicyResponse = LookupPolicyResponse'
  { -- | The pagination token.
    nextToken :: Prelude.Maybe Prelude.Text,
    -- | Provides list of path to policies. Policies contain @PolicyId@,
    -- @ObjectIdentifier@, and @PolicyType@. For more information, see
    -- <https://docs.aws.amazon.com/clouddirectory/latest/developerguide/key_concepts_directory.html#key_concepts_policies Policies>.
    policyToPathList :: Prelude.Maybe [PolicyToPath],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'LookupPolicyResponse' 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', 'lookupPolicyResponse_nextToken' - The pagination token.
--
-- 'policyToPathList', 'lookupPolicyResponse_policyToPathList' - Provides list of path to policies. Policies contain @PolicyId@,
-- @ObjectIdentifier@, and @PolicyType@. For more information, see
-- <https://docs.aws.amazon.com/clouddirectory/latest/developerguide/key_concepts_directory.html#key_concepts_policies Policies>.
--
-- 'httpStatus', 'lookupPolicyResponse_httpStatus' - The response's http status code.
newLookupPolicyResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  LookupPolicyResponse
newLookupPolicyResponse pHttpStatus_ =
  LookupPolicyResponse'
    { nextToken = Prelude.Nothing,
      policyToPathList = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | The pagination token.
lookupPolicyResponse_nextToken :: Lens.Lens' LookupPolicyResponse (Prelude.Maybe Prelude.Text)
lookupPolicyResponse_nextToken = Lens.lens (\LookupPolicyResponse' {nextToken} -> nextToken) (\s@LookupPolicyResponse' {} a -> s {nextToken = a} :: LookupPolicyResponse)

-- | Provides list of path to policies. Policies contain @PolicyId@,
-- @ObjectIdentifier@, and @PolicyType@. For more information, see
-- <https://docs.aws.amazon.com/clouddirectory/latest/developerguide/key_concepts_directory.html#key_concepts_policies Policies>.
lookupPolicyResponse_policyToPathList :: Lens.Lens' LookupPolicyResponse (Prelude.Maybe [PolicyToPath])
lookupPolicyResponse_policyToPathList = Lens.lens (\LookupPolicyResponse' {policyToPathList} -> policyToPathList) (\s@LookupPolicyResponse' {} a -> s {policyToPathList = a} :: LookupPolicyResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData LookupPolicyResponse where
  rnf LookupPolicyResponse' {..} =
    Prelude.rnf nextToken
      `Prelude.seq` Prelude.rnf policyToPathList
      `Prelude.seq` Prelude.rnf httpStatus