{-# 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.QLDB.GetBlock
-- 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 block object at a specified address in a journal. Also returns
-- a proof of the specified block for verification if @DigestTipAddress@ is
-- provided.
--
-- For information about the data contents in a block, see
-- <https://docs.aws.amazon.com/qldb/latest/developerguide/journal-contents.html Journal contents>
-- in the /Amazon QLDB Developer Guide/.
--
-- If the specified ledger doesn\'t exist or is in @DELETING@ status, then
-- throws @ResourceNotFoundException@.
--
-- If the specified ledger is in @CREATING@ status, then throws
-- @ResourcePreconditionNotMetException@.
--
-- If no block exists with the specified address, then throws
-- @InvalidParameterException@.
module Amazonka.QLDB.GetBlock
  ( -- * Creating a Request
    GetBlock (..),
    newGetBlock,

    -- * Request Lenses
    getBlock_digestTipAddress,
    getBlock_name,
    getBlock_blockAddress,

    -- * Destructuring the Response
    GetBlockResponse (..),
    newGetBlockResponse,

    -- * Response Lenses
    getBlockResponse_proof,
    getBlockResponse_httpStatus,
    getBlockResponse_block,
  )
where

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 Amazonka.QLDB.Types
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | /See:/ 'newGetBlock' smart constructor.
data GetBlock = GetBlock'
  { -- | The latest block location covered by the digest for which to request a
    -- proof. An address is an Amazon Ion structure that has two fields:
    -- @strandId@ and @sequenceNo@.
    --
    -- For example: @{strandId:\"BlFTjlSXze9BIh1KOszcE3\",sequenceNo:49}@.
    digestTipAddress :: Prelude.Maybe (Data.Sensitive ValueHolder),
    -- | The name of the ledger.
    name :: Prelude.Text,
    -- | The location of the block that you want to request. An address is an
    -- Amazon Ion structure that has two fields: @strandId@ and @sequenceNo@.
    --
    -- For example: @{strandId:\"BlFTjlSXze9BIh1KOszcE3\",sequenceNo:14}@.
    blockAddress :: Data.Sensitive ValueHolder
  }
  deriving (Prelude.Eq, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetBlock' 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:
--
-- 'digestTipAddress', 'getBlock_digestTipAddress' - The latest block location covered by the digest for which to request a
-- proof. An address is an Amazon Ion structure that has two fields:
-- @strandId@ and @sequenceNo@.
--
-- For example: @{strandId:\"BlFTjlSXze9BIh1KOszcE3\",sequenceNo:49}@.
--
-- 'name', 'getBlock_name' - The name of the ledger.
--
-- 'blockAddress', 'getBlock_blockAddress' - The location of the block that you want to request. An address is an
-- Amazon Ion structure that has two fields: @strandId@ and @sequenceNo@.
--
-- For example: @{strandId:\"BlFTjlSXze9BIh1KOszcE3\",sequenceNo:14}@.
newGetBlock ::
  -- | 'name'
  Prelude.Text ->
  -- | 'blockAddress'
  ValueHolder ->
  GetBlock
newGetBlock pName_ pBlockAddress_ =
  GetBlock'
    { digestTipAddress = Prelude.Nothing,
      name = pName_,
      blockAddress = Data._Sensitive Lens.# pBlockAddress_
    }

-- | The latest block location covered by the digest for which to request a
-- proof. An address is an Amazon Ion structure that has two fields:
-- @strandId@ and @sequenceNo@.
--
-- For example: @{strandId:\"BlFTjlSXze9BIh1KOszcE3\",sequenceNo:49}@.
getBlock_digestTipAddress :: Lens.Lens' GetBlock (Prelude.Maybe ValueHolder)
getBlock_digestTipAddress = Lens.lens (\GetBlock' {digestTipAddress} -> digestTipAddress) (\s@GetBlock' {} a -> s {digestTipAddress = a} :: GetBlock) Prelude.. Lens.mapping Data._Sensitive

-- | The name of the ledger.
getBlock_name :: Lens.Lens' GetBlock Prelude.Text
getBlock_name = Lens.lens (\GetBlock' {name} -> name) (\s@GetBlock' {} a -> s {name = a} :: GetBlock)

-- | The location of the block that you want to request. An address is an
-- Amazon Ion structure that has two fields: @strandId@ and @sequenceNo@.
--
-- For example: @{strandId:\"BlFTjlSXze9BIh1KOszcE3\",sequenceNo:14}@.
getBlock_blockAddress :: Lens.Lens' GetBlock ValueHolder
getBlock_blockAddress = Lens.lens (\GetBlock' {blockAddress} -> blockAddress) (\s@GetBlock' {} a -> s {blockAddress = a} :: GetBlock) Prelude.. Data._Sensitive

instance Core.AWSRequest GetBlock where
  type AWSResponse GetBlock = GetBlockResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          GetBlockResponse'
            Prelude.<$> (x Data..?> "Proof")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
            Prelude.<*> (x Data..:> "Block")
      )

instance Prelude.Hashable GetBlock where
  hashWithSalt _salt GetBlock' {..} =
    _salt
      `Prelude.hashWithSalt` digestTipAddress
      `Prelude.hashWithSalt` name
      `Prelude.hashWithSalt` blockAddress

instance Prelude.NFData GetBlock where
  rnf GetBlock' {..} =
    Prelude.rnf digestTipAddress
      `Prelude.seq` Prelude.rnf name
      `Prelude.seq` Prelude.rnf blockAddress

instance Data.ToHeaders GetBlock where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.0" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON GetBlock where
  toJSON GetBlock' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("DigestTipAddress" Data..=)
              Prelude.<$> digestTipAddress,
            Prelude.Just ("BlockAddress" Data..= blockAddress)
          ]
      )

instance Data.ToPath GetBlock where
  toPath GetBlock' {..} =
    Prelude.mconcat
      ["/ledgers/", Data.toBS name, "/block"]

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

-- | /See:/ 'newGetBlockResponse' smart constructor.
data GetBlockResponse = GetBlockResponse'
  { -- | The proof object in Amazon Ion format returned by a @GetBlock@ request.
    -- A proof contains the list of hash values required to recalculate the
    -- specified digest using a Merkle tree, starting with the specified block.
    proof :: Prelude.Maybe (Data.Sensitive ValueHolder),
    -- | The response's http status code.
    httpStatus :: Prelude.Int,
    -- | The block data object in Amazon Ion format.
    block :: Data.Sensitive ValueHolder
  }
  deriving (Prelude.Eq, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetBlockResponse' 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:
--
-- 'proof', 'getBlockResponse_proof' - The proof object in Amazon Ion format returned by a @GetBlock@ request.
-- A proof contains the list of hash values required to recalculate the
-- specified digest using a Merkle tree, starting with the specified block.
--
-- 'httpStatus', 'getBlockResponse_httpStatus' - The response's http status code.
--
-- 'block', 'getBlockResponse_block' - The block data object in Amazon Ion format.
newGetBlockResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  -- | 'block'
  ValueHolder ->
  GetBlockResponse
newGetBlockResponse pHttpStatus_ pBlock_ =
  GetBlockResponse'
    { proof = Prelude.Nothing,
      httpStatus = pHttpStatus_,
      block = Data._Sensitive Lens.# pBlock_
    }

-- | The proof object in Amazon Ion format returned by a @GetBlock@ request.
-- A proof contains the list of hash values required to recalculate the
-- specified digest using a Merkle tree, starting with the specified block.
getBlockResponse_proof :: Lens.Lens' GetBlockResponse (Prelude.Maybe ValueHolder)
getBlockResponse_proof = Lens.lens (\GetBlockResponse' {proof} -> proof) (\s@GetBlockResponse' {} a -> s {proof = a} :: GetBlockResponse) Prelude.. Lens.mapping Data._Sensitive

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

-- | The block data object in Amazon Ion format.
getBlockResponse_block :: Lens.Lens' GetBlockResponse ValueHolder
getBlockResponse_block = Lens.lens (\GetBlockResponse' {block} -> block) (\s@GetBlockResponse' {} a -> s {block = a} :: GetBlockResponse) Prelude.. Data._Sensitive

instance Prelude.NFData GetBlockResponse where
  rnf GetBlockResponse' {..} =
    Prelude.rnf proof
      `Prelude.seq` Prelude.rnf httpStatus
      `Prelude.seq` Prelude.rnf block