{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE TypeFamilies #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}

-- | Keep is a database built on Data.Acid.
--
-- If this proves useful, maybe we could make it a more general thing. Like
-- `Biz.Keep`. I could wrap all the safecopy stuff in my own template haskell
-- like `$(keep ''MyType)`.
--
module Biz.Ibb.Keep where

import Biz.Ibb.Influencers (Person(..), Book(..))
import Data.SafeCopy
import Data.Data (Data, Typeable)
import Data.Text (Text)
import Data.IxSet (Indexable(..), ixFun, ixSet)

-- * Index @Person@

$(deriveSafeCopy 0 'base  ''Person)

newtype PersonName =
  PersonName Text deriving (Eq, Ord, Data, Typeable)

newtype PersonBlurb =
  PersonBlurb Text deriving (Eq, Ord, Data, Typeable)

instance Indexable Person where
  empty = ixSet
    [ ixFun $ \p -> [ PersonName $ _name p ]
    , ixFun $ \p -> [ _pic p ]
    , ixFun $ \p -> [ _twitter p ]
    , ixFun $ \p -> [ _website p ]
    , ixFun $ \p -> [ _books p ]
    , ixFun $ \p -> [ PersonBlurb $ _blurb p ]
    ]

-- * Index @Book@

$(deriveSafeCopy 0 'base  ''Book)

newtype BookTitle =
  BookTitle Text deriving (Eq, Ord, Data, Typeable)

newtype BookAuthor =
  BookAuthor Text deriving (Eq, Ord, Data, Typeable)

instance Indexable Book where
  empty = ixSet
    [ ixFun $ \b -> [ BookTitle $ _title b ]
    , ixFun $ \b -> [ BookAuthor $ _author b ]
    , ixFun $ \b -> [ _amznref b ]
    ]