{-# 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.ListPolicies
-- 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 the managed policies that are available in your Amazon Web
-- Services account, including your own customer-defined managed policies
-- and all Amazon Web Services managed policies.
--
-- You can filter the list of policies that is returned using the optional
-- @OnlyAttached@, @Scope@, and @PathPrefix@ parameters. For example, to
-- list only the customer managed policies in your Amazon Web Services
-- account, set @Scope@ to @Local@. To list only Amazon Web Services
-- managed policies, set @Scope@ to @AWS@.
--
-- You can paginate the results using the @MaxItems@ and @Marker@
-- parameters.
--
-- For more information about managed policies, see
-- <https://docs.aws.amazon.com/IAM/latest/UserGuide/policies-managed-vs-inline.html Managed policies and inline policies>
-- in the /IAM User Guide/.
--
-- IAM resource-listing operations return a subset of the available
-- attributes for the resource. For example, this operation does not return
-- tags, even though they are an attribute of the returned object. To view
-- all of the information for a customer manged policy, see GetPolicy.
--
-- This operation returns paginated results.
module Amazonka.IAM.ListPolicies
  ( -- * Creating a Request
    ListPolicies (..),
    newListPolicies,

    -- * Request Lenses
    listPolicies_marker,
    listPolicies_maxItems,
    listPolicies_onlyAttached,
    listPolicies_pathPrefix,
    listPolicies_policyUsageFilter,
    listPolicies_scope,

    -- * Destructuring the Response
    ListPoliciesResponse (..),
    newListPoliciesResponse,

    -- * Response Lenses
    listPoliciesResponse_isTruncated,
    listPoliciesResponse_marker,
    listPoliciesResponse_policies,
    listPoliciesResponse_httpStatus,
  )
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:/ 'newListPolicies' smart constructor.
data ListPolicies = ListPolicies'
  { -- | 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,
    -- | A flag to filter the results to only the attached policies.
    --
    -- When @OnlyAttached@ is @true@, the returned list contains only the
    -- policies that are attached to an IAM user, group, or role. When
    -- @OnlyAttached@ is @false@, or when the parameter is not included, all
    -- policies are returned.
    onlyAttached :: Prelude.Maybe Prelude.Bool,
    -- | The path prefix for filtering the results. This parameter is optional.
    -- If it is not included, it defaults to a slash (\/), listing all
    -- policies. This parameter allows (through its
    -- <http://wikipedia.org/wiki/regex regex pattern>) a string of characters
    -- consisting of either a forward slash (\/) by itself or a string that
    -- must begin and end with forward slashes. In addition, it can contain any
    -- ASCII character from the ! (@\\u0021@) through the DEL character
    -- (@\\u007F@), including most punctuation characters, digits, and upper
    -- and lowercased letters.
    pathPrefix :: Prelude.Maybe Prelude.Text,
    -- | The policy usage method to use for filtering the results.
    --
    -- To list only permissions policies,
    -- set @PolicyUsageFilter@ to @PermissionsPolicy@. To list only the
    -- policies used to set permissions boundaries, set the value
    -- to @PermissionsBoundary@.
    --
    -- This parameter is optional. If it is not included, all policies are
    -- returned.
    policyUsageFilter :: Prelude.Maybe PolicyUsageType,
    -- | The scope to use for filtering the results.
    --
    -- To list only Amazon Web Services managed policies, set @Scope@ to @AWS@.
    -- To list only the customer managed policies in your Amazon Web Services
    -- account, set @Scope@ to @Local@.
    --
    -- This parameter is optional. If it is not included, or if it is set to
    -- @All@, all policies are returned.
    scope :: Prelude.Maybe PolicyScopeType
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListPolicies' 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', 'listPolicies_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', 'listPolicies_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.
--
-- 'onlyAttached', 'listPolicies_onlyAttached' - A flag to filter the results to only the attached policies.
--
-- When @OnlyAttached@ is @true@, the returned list contains only the
-- policies that are attached to an IAM user, group, or role. When
-- @OnlyAttached@ is @false@, or when the parameter is not included, all
-- policies are returned.
--
-- 'pathPrefix', 'listPolicies_pathPrefix' - The path prefix for filtering the results. This parameter is optional.
-- If it is not included, it defaults to a slash (\/), listing all
-- policies. This parameter allows (through its
-- <http://wikipedia.org/wiki/regex regex pattern>) a string of characters
-- consisting of either a forward slash (\/) by itself or a string that
-- must begin and end with forward slashes. In addition, it can contain any
-- ASCII character from the ! (@\\u0021@) through the DEL character
-- (@\\u007F@), including most punctuation characters, digits, and upper
-- and lowercased letters.
--
-- 'policyUsageFilter', 'listPolicies_policyUsageFilter' - The policy usage method to use for filtering the results.
--
-- To list only permissions policies,
-- set @PolicyUsageFilter@ to @PermissionsPolicy@. To list only the
-- policies used to set permissions boundaries, set the value
-- to @PermissionsBoundary@.
--
-- This parameter is optional. If it is not included, all policies are
-- returned.
--
-- 'scope', 'listPolicies_scope' - The scope to use for filtering the results.
--
-- To list only Amazon Web Services managed policies, set @Scope@ to @AWS@.
-- To list only the customer managed policies in your Amazon Web Services
-- account, set @Scope@ to @Local@.
--
-- This parameter is optional. If it is not included, or if it is set to
-- @All@, all policies are returned.
newListPolicies ::
  ListPolicies
newListPolicies =
  ListPolicies'
    { marker = Prelude.Nothing,
      maxItems = Prelude.Nothing,
      onlyAttached = Prelude.Nothing,
      pathPrefix = Prelude.Nothing,
      policyUsageFilter = Prelude.Nothing,
      scope = Prelude.Nothing
    }

-- | 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.
listPolicies_marker :: Lens.Lens' ListPolicies (Prelude.Maybe Prelude.Text)
listPolicies_marker = Lens.lens (\ListPolicies' {marker} -> marker) (\s@ListPolicies' {} a -> s {marker = a} :: ListPolicies)

-- | 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.
listPolicies_maxItems :: Lens.Lens' ListPolicies (Prelude.Maybe Prelude.Natural)
listPolicies_maxItems = Lens.lens (\ListPolicies' {maxItems} -> maxItems) (\s@ListPolicies' {} a -> s {maxItems = a} :: ListPolicies)

-- | A flag to filter the results to only the attached policies.
--
-- When @OnlyAttached@ is @true@, the returned list contains only the
-- policies that are attached to an IAM user, group, or role. When
-- @OnlyAttached@ is @false@, or when the parameter is not included, all
-- policies are returned.
listPolicies_onlyAttached :: Lens.Lens' ListPolicies (Prelude.Maybe Prelude.Bool)
listPolicies_onlyAttached = Lens.lens (\ListPolicies' {onlyAttached} -> onlyAttached) (\s@ListPolicies' {} a -> s {onlyAttached = a} :: ListPolicies)

-- | The path prefix for filtering the results. This parameter is optional.
-- If it is not included, it defaults to a slash (\/), listing all
-- policies. This parameter allows (through its
-- <http://wikipedia.org/wiki/regex regex pattern>) a string of characters
-- consisting of either a forward slash (\/) by itself or a string that
-- must begin and end with forward slashes. In addition, it can contain any
-- ASCII character from the ! (@\\u0021@) through the DEL character
-- (@\\u007F@), including most punctuation characters, digits, and upper
-- and lowercased letters.
listPolicies_pathPrefix :: Lens.Lens' ListPolicies (Prelude.Maybe Prelude.Text)
listPolicies_pathPrefix = Lens.lens (\ListPolicies' {pathPrefix} -> pathPrefix) (\s@ListPolicies' {} a -> s {pathPrefix = a} :: ListPolicies)

-- | The policy usage method to use for filtering the results.
--
-- To list only permissions policies,
-- set @PolicyUsageFilter@ to @PermissionsPolicy@. To list only the
-- policies used to set permissions boundaries, set the value
-- to @PermissionsBoundary@.
--
-- This parameter is optional. If it is not included, all policies are
-- returned.
listPolicies_policyUsageFilter :: Lens.Lens' ListPolicies (Prelude.Maybe PolicyUsageType)
listPolicies_policyUsageFilter = Lens.lens (\ListPolicies' {policyUsageFilter} -> policyUsageFilter) (\s@ListPolicies' {} a -> s {policyUsageFilter = a} :: ListPolicies)

-- | The scope to use for filtering the results.
--
-- To list only Amazon Web Services managed policies, set @Scope@ to @AWS@.
-- To list only the customer managed policies in your Amazon Web Services
-- account, set @Scope@ to @Local@.
--
-- This parameter is optional. If it is not included, or if it is set to
-- @All@, all policies are returned.
listPolicies_scope :: Lens.Lens' ListPolicies (Prelude.Maybe PolicyScopeType)
listPolicies_scope = Lens.lens (\ListPolicies' {scope} -> scope) (\s@ListPolicies' {} a -> s {scope = a} :: ListPolicies)

instance Core.AWSPager ListPolicies where
  page rq rs
    | Core.stop
        ( rs
            Lens.^? listPoliciesResponse_isTruncated
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.isNothing
        ( rs
            Lens.^? listPoliciesResponse_marker
            Prelude.. Lens._Just
        ) =
        Prelude.Nothing
    | Prelude.otherwise =
        Prelude.Just
          Prelude.$ rq
          Prelude.& listPolicies_marker
          Lens..~ rs
          Lens.^? listPoliciesResponse_marker
          Prelude.. Lens._Just

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

instance Prelude.Hashable ListPolicies where
  hashWithSalt _salt ListPolicies' {..} =
    _salt
      `Prelude.hashWithSalt` marker
      `Prelude.hashWithSalt` maxItems
      `Prelude.hashWithSalt` onlyAttached
      `Prelude.hashWithSalt` pathPrefix
      `Prelude.hashWithSalt` policyUsageFilter
      `Prelude.hashWithSalt` scope

instance Prelude.NFData ListPolicies where
  rnf ListPolicies' {..} =
    Prelude.rnf marker
      `Prelude.seq` Prelude.rnf maxItems
      `Prelude.seq` Prelude.rnf onlyAttached
      `Prelude.seq` Prelude.rnf pathPrefix
      `Prelude.seq` Prelude.rnf policyUsageFilter
      `Prelude.seq` Prelude.rnf scope

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

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

instance Data.ToQuery ListPolicies where
  toQuery ListPolicies' {..} =
    Prelude.mconcat
      [ "Action"
          Data.=: ("ListPolicies" :: Prelude.ByteString),
        "Version"
          Data.=: ("2010-05-08" :: Prelude.ByteString),
        "Marker" Data.=: marker,
        "MaxItems" Data.=: maxItems,
        "OnlyAttached" Data.=: onlyAttached,
        "PathPrefix" Data.=: pathPrefix,
        "PolicyUsageFilter" Data.=: policyUsageFilter,
        "Scope" Data.=: scope
      ]

-- | Contains the response to a successful ListPolicies request.
--
-- /See:/ 'newListPoliciesResponse' smart constructor.
data ListPoliciesResponse = ListPoliciesResponse'
  { -- | 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,
    -- | A list of policies.
    policies :: Prelude.Maybe [Policy],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'ListPoliciesResponse' 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', 'listPoliciesResponse_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', 'listPoliciesResponse_marker' - When @IsTruncated@ is @true@, this element is present and contains the
-- value to use for the @Marker@ parameter in a subsequent pagination
-- request.
--
-- 'policies', 'listPoliciesResponse_policies' - A list of policies.
--
-- 'httpStatus', 'listPoliciesResponse_httpStatus' - The response's http status code.
newListPoliciesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  ListPoliciesResponse
newListPoliciesResponse pHttpStatus_ =
  ListPoliciesResponse'
    { isTruncated =
        Prelude.Nothing,
      marker = Prelude.Nothing,
      policies = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | 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.
listPoliciesResponse_isTruncated :: Lens.Lens' ListPoliciesResponse (Prelude.Maybe Prelude.Bool)
listPoliciesResponse_isTruncated = Lens.lens (\ListPoliciesResponse' {isTruncated} -> isTruncated) (\s@ListPoliciesResponse' {} a -> s {isTruncated = a} :: ListPoliciesResponse)

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

-- | A list of policies.
listPoliciesResponse_policies :: Lens.Lens' ListPoliciesResponse (Prelude.Maybe [Policy])
listPoliciesResponse_policies = Lens.lens (\ListPoliciesResponse' {policies} -> policies) (\s@ListPoliciesResponse' {} a -> s {policies = a} :: ListPoliciesResponse) Prelude.. Lens.mapping Lens.coerced

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

instance Prelude.NFData ListPoliciesResponse where
  rnf ListPoliciesResponse' {..} =
    Prelude.rnf isTruncated
      `Prelude.seq` Prelude.rnf marker
      `Prelude.seq` Prelude.rnf policies
      `Prelude.seq` Prelude.rnf httpStatus