{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Amazonka.LexModels.Types.SlotDefaultValueSpec
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
module Amazonka.LexModels.Types.SlotDefaultValueSpec where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.LexModels.Types.SlotDefaultValue
import qualified Amazonka.Prelude as Prelude

-- | Contains the default values for a slot. Default values are used when
-- Amazon Lex hasn\'t determined a value for a slot.
--
-- /See:/ 'newSlotDefaultValueSpec' smart constructor.
data SlotDefaultValueSpec = SlotDefaultValueSpec'
  { -- | The default values for a slot. You can specify more than one default.
    -- For example, you can specify a default value to use from a matching
    -- context variable, a session attribute, or a fixed value.
    --
    -- The default value chosen is selected based on the order that you specify
    -- them in the list. For example, if you specify a context variable and a
    -- fixed value in that order, Amazon Lex uses the context variable if it is
    -- available, else it uses the fixed value.
    SlotDefaultValueSpec -> [SlotDefaultValue]
defaultValueList :: [SlotDefaultValue]
  }
  deriving (SlotDefaultValueSpec -> SlotDefaultValueSpec -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: SlotDefaultValueSpec -> SlotDefaultValueSpec -> Bool
$c/= :: SlotDefaultValueSpec -> SlotDefaultValueSpec -> Bool
== :: SlotDefaultValueSpec -> SlotDefaultValueSpec -> Bool
$c== :: SlotDefaultValueSpec -> SlotDefaultValueSpec -> Bool
Prelude.Eq, ReadPrec [SlotDefaultValueSpec]
ReadPrec SlotDefaultValueSpec
Int -> ReadS SlotDefaultValueSpec
ReadS [SlotDefaultValueSpec]
forall a.
(Int -> ReadS a)
-> ReadS [a] -> ReadPrec a -> ReadPrec [a] -> Read a
readListPrec :: ReadPrec [SlotDefaultValueSpec]
$creadListPrec :: ReadPrec [SlotDefaultValueSpec]
readPrec :: ReadPrec SlotDefaultValueSpec
$creadPrec :: ReadPrec SlotDefaultValueSpec
readList :: ReadS [SlotDefaultValueSpec]
$creadList :: ReadS [SlotDefaultValueSpec]
readsPrec :: Int -> ReadS SlotDefaultValueSpec
$creadsPrec :: Int -> ReadS SlotDefaultValueSpec
Prelude.Read, Int -> SlotDefaultValueSpec -> ShowS
[SlotDefaultValueSpec] -> ShowS
SlotDefaultValueSpec -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [SlotDefaultValueSpec] -> ShowS
$cshowList :: [SlotDefaultValueSpec] -> ShowS
show :: SlotDefaultValueSpec -> String
$cshow :: SlotDefaultValueSpec -> String
showsPrec :: Int -> SlotDefaultValueSpec -> ShowS
$cshowsPrec :: Int -> SlotDefaultValueSpec -> ShowS
Prelude.Show, forall x. Rep SlotDefaultValueSpec x -> SlotDefaultValueSpec
forall x. SlotDefaultValueSpec -> Rep SlotDefaultValueSpec x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep SlotDefaultValueSpec x -> SlotDefaultValueSpec
$cfrom :: forall x. SlotDefaultValueSpec -> Rep SlotDefaultValueSpec x
Prelude.Generic)

-- |
-- Create a value of 'SlotDefaultValueSpec' 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:
--
-- 'defaultValueList', 'slotDefaultValueSpec_defaultValueList' - The default values for a slot. You can specify more than one default.
-- For example, you can specify a default value to use from a matching
-- context variable, a session attribute, or a fixed value.
--
-- The default value chosen is selected based on the order that you specify
-- them in the list. For example, if you specify a context variable and a
-- fixed value in that order, Amazon Lex uses the context variable if it is
-- available, else it uses the fixed value.
newSlotDefaultValueSpec ::
  SlotDefaultValueSpec
newSlotDefaultValueSpec :: SlotDefaultValueSpec
newSlotDefaultValueSpec =
  SlotDefaultValueSpec'
    { $sel:defaultValueList:SlotDefaultValueSpec' :: [SlotDefaultValue]
defaultValueList =
        forall a. Monoid a => a
Prelude.mempty
    }

-- | The default values for a slot. You can specify more than one default.
-- For example, you can specify a default value to use from a matching
-- context variable, a session attribute, or a fixed value.
--
-- The default value chosen is selected based on the order that you specify
-- them in the list. For example, if you specify a context variable and a
-- fixed value in that order, Amazon Lex uses the context variable if it is
-- available, else it uses the fixed value.
slotDefaultValueSpec_defaultValueList :: Lens.Lens' SlotDefaultValueSpec [SlotDefaultValue]
slotDefaultValueSpec_defaultValueList :: Lens' SlotDefaultValueSpec [SlotDefaultValue]
slotDefaultValueSpec_defaultValueList = forall s a b t. (s -> a) -> (s -> b -> t) -> Lens s t a b
Lens.lens (\SlotDefaultValueSpec' {[SlotDefaultValue]
defaultValueList :: [SlotDefaultValue]
$sel:defaultValueList:SlotDefaultValueSpec' :: SlotDefaultValueSpec -> [SlotDefaultValue]
defaultValueList} -> [SlotDefaultValue]
defaultValueList) (\s :: SlotDefaultValueSpec
s@SlotDefaultValueSpec' {} [SlotDefaultValue]
a -> SlotDefaultValueSpec
s {$sel:defaultValueList:SlotDefaultValueSpec' :: [SlotDefaultValue]
defaultValueList = [SlotDefaultValue]
a} :: SlotDefaultValueSpec) forall b c a. (b -> c) -> (a -> b) -> a -> c
Prelude.. forall s t a b. (Coercible s a, Coercible t b) => Iso s t a b
Lens.coerced

instance Data.FromJSON SlotDefaultValueSpec where
  parseJSON :: Value -> Parser SlotDefaultValueSpec
parseJSON =
    forall a. String -> (Object -> Parser a) -> Value -> Parser a
Data.withObject
      String
"SlotDefaultValueSpec"
      ( \Object
x ->
          [SlotDefaultValue] -> SlotDefaultValueSpec
SlotDefaultValueSpec'
            forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
Prelude.<$> ( Object
x
                            forall a. FromJSON a => Object -> Key -> Parser (Maybe a)
Data..:? Key
"defaultValueList"
                            forall a. Parser (Maybe a) -> a -> Parser a
Data..!= forall a. Monoid a => a
Prelude.mempty
                        )
      )

instance Prelude.Hashable SlotDefaultValueSpec where
  hashWithSalt :: Int -> SlotDefaultValueSpec -> Int
hashWithSalt Int
_salt SlotDefaultValueSpec' {[SlotDefaultValue]
defaultValueList :: [SlotDefaultValue]
$sel:defaultValueList:SlotDefaultValueSpec' :: SlotDefaultValueSpec -> [SlotDefaultValue]
..} =
    Int
_salt forall a. Hashable a => Int -> a -> Int
`Prelude.hashWithSalt` [SlotDefaultValue]
defaultValueList

instance Prelude.NFData SlotDefaultValueSpec where
  rnf :: SlotDefaultValueSpec -> ()
rnf SlotDefaultValueSpec' {[SlotDefaultValue]
defaultValueList :: [SlotDefaultValue]
$sel:defaultValueList:SlotDefaultValueSpec' :: SlotDefaultValueSpec -> [SlotDefaultValue]
..} =
    forall a. NFData a => a -> ()
Prelude.rnf [SlotDefaultValue]
defaultValueList

instance Data.ToJSON SlotDefaultValueSpec where
  toJSON :: SlotDefaultValueSpec -> Value
toJSON SlotDefaultValueSpec' {[SlotDefaultValue]
defaultValueList :: [SlotDefaultValue]
$sel:defaultValueList:SlotDefaultValueSpec' :: SlotDefaultValueSpec -> [SlotDefaultValue]
..} =
    [Pair] -> Value
Data.object
      ( forall a. [Maybe a] -> [a]
Prelude.catMaybes
          [ forall a. a -> Maybe a
Prelude.Just
              (Key
"defaultValueList" forall kv v. (KeyValue kv, ToJSON v) => Key -> v -> kv
Data..= [SlotDefaultValue]
defaultValueList)
          ]
      )