Author.hs

{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NoFieldSelectors #-}
{-# LANGUAGE OverloadedRecordDot #-}
{-# LANGUAGE TypeApplications #-}

module Schema.Author
  ( AuthorTable (..),
    AuthorRow (..),
    AuthorSelect (..),
    AuthorPicked (..),
    authorSelect,
    authorSelectColumns,
    parseAuthorPicked,
    toAuthorPicked,
    AuthorCreate (..),
    AuthorUpdate (..),
    authorId,
    authorName
  )
where

import Data.Text (Text)
import Data.UUID (UUID)
import Poppy.Internal.Generated
  ( FromRow (..),
    RowParser,
    field,
    Entity (..),
    Field (..),
    PrimaryKeyType,
    ModelTable,
    Picked (..),
    picked,
    Insertable (..),
    emptyInsert,
    set,
    setMaybe,
    Updatable (..),
    emptyUpdate,
    setFieldMaybe
  )

data AuthorTable = AuthorTable

type instance PrimaryKeyType AuthorTable = UUID

type instance ModelTable "Author" = AuthorTable

instance Entity AuthorTable where
  tableName = "test_author"
  primaryKey = authorId
  tableColumns = ["id", "name"]

instance Insertable AuthorTable where
  type CreateInput AuthorTable = AuthorCreate
  toInsertBuilder input =
    setMaybe authorId input.id $
      set authorName input.name $
      emptyInsert @AuthorTable


instance Updatable AuthorTable where
  type UpdateInput AuthorTable = AuthorUpdate
  updatedAtField = Nothing
  toUpdateBuilder input =
    setFieldMaybe authorName input.name $
      emptyUpdate @AuthorTable


data AuthorRow = AuthorRow
  { id :: UUID,
    name :: Text
  }
  deriving (Show, Eq)


data AuthorCreate = AuthorCreate
  { id :: Maybe UUID,
    name :: Text
  }
  deriving (Show, Eq)


data AuthorUpdate = AuthorUpdate
  { name :: Maybe Text
  }
  deriving (Show, Eq)


instance FromRow AuthorRow where
  fromRow = AuthorRow <$> field <*> field


data AuthorSelect = AuthorSelect
  { id :: Bool,
    name :: Bool
  }
  deriving (Show, Eq)
data AuthorPicked = AuthorPicked
  { id :: UUID,
    name :: Picked Text
  }
  deriving (Show, Eq)
authorSelect :: AuthorSelect
authorSelect =
  AuthorSelect
    { id = False,
      name = False
    }
authorSelectColumns :: AuthorSelect -> [Text]
authorSelectColumns select_ =
  fieldColumn authorId
    : concat
      [ [fieldColumn authorName | select_.name]
      ]
parseAuthorPicked :: AuthorSelect -> RowParser AuthorPicked
parseAuthorPicked select_ = do
  idVal <- field
  nameVal <- if select_.name then Picked <$> field else pure Skipped
  pure AuthorPicked { id = idVal, name = nameVal }
toAuthorPicked :: AuthorSelect -> AuthorRow -> AuthorPicked
toAuthorPicked select_ row =
  AuthorPicked
    { id = row.id,
      name = picked select_.name row.name
    }


authorId :: Field AuthorTable UUID
authorId = Field "id" "id"

authorName :: Field AuthorTable Text
authorName = Field "name" "name"