{-# OPTIONS_GHC -fno-warn-orphans  #-}
{-# LANGUAGE TemplateHaskell       #-}
{-# LANGUAGE MultiParamTypeClasses #-}

-- |
-- Module      : Database.HDBC.Schema.MySQL
-- Copyright   : 2013 Sho KURODA, 2017-2019 Kei Hibiono
-- License     : BSD3
--
-- Maintainer  : krdlab@gmail.com
-- Stability   : experimental
-- Portability : unknown
module Database.HDBC.Schema.MySQL
    (
      driverMySQL
    )
    where

import           Prelude                            hiding (length)
import           Language.Haskell.TH                (TypeQ)
import           Control.Applicative                ((<$>), (<|>))
import           Control.Monad                      (guard)
import           Control.Monad.Trans.Class          (lift)
import           Control.Monad.Trans.Maybe          (MaybeT)
import qualified Data.List                          as List
import           Data.Map                           (fromList)

import           Database.HDBC                      (IConnection, SqlValue)
import           Database.Record                    (FromSql, ToSql)
import           Database.HDBC.Record.Query         (runQuery')
import           Database.HDBC.Record.Persistable   ()
import           Database.HDBC.Schema.Driver        ( TypeMap
                                                    , LogChan
                                                    , putVerbose
                                                    , failWith
                                                    , maybeIO
                                                    , hoistMaybe
                                                    , Driver
                                                    , driverConfig
                                                    , getFieldsWithMap
                                                    , getPrimaryKey
                                                    , emptyDriver
                                                    )
import           Database.Relational.Schema.MySQL   ( normalizeColumn
                                                    , notNull
                                                    , getType
                                                    , columnsQuerySQL
                                                    , primaryKeyQuerySQL
                                                    )

import           Database.Relational.Schema.MySQL.Columns (Columns)
import qualified Database.Relational.Schema.MySQL.Columns as Columns
import           Database.Relational.Schema.MySQL (config)


instance FromSql SqlValue Columns
instance ToSql SqlValue Columns

logPrefix :: String -> String
logPrefix :: String -> String
logPrefix = ("MySQL: " String -> String -> String
forall a. [a] -> [a] -> [a]
++)

putLog :: LogChan -> String -> IO ()
putLog :: LogChan -> String -> IO ()
putLog lchan :: LogChan
lchan = LogChan -> String -> IO ()
putVerbose LogChan
lchan (String -> IO ()) -> (String -> String) -> String -> IO ()
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> String
logPrefix

compileError :: LogChan -> String -> MaybeT IO a
compileError :: LogChan -> String -> MaybeT IO a
compileError lchan :: LogChan
lchan = LogChan -> String -> MaybeT IO a
forall a. LogChan -> String -> MaybeT IO a
failWith LogChan
lchan (String -> MaybeT IO a)
-> (String -> String) -> String -> MaybeT IO a
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> String
logPrefix

getPrimaryKey' :: IConnection conn
               => conn
               -> LogChan
               -> String
               -> String
               -> IO [String]
getPrimaryKey' :: conn -> LogChan -> String -> String -> IO [String]
getPrimaryKey' conn :: conn
conn lchan :: LogChan
lchan scm :: String
scm tbl :: String
tbl = do
    [String]
primCols <- conn
-> Query (String, String) String -> (String, String) -> IO [String]
forall conn p a.
(IConnection conn, ToSql SqlValue p, FromSql SqlValue a) =>
conn -> Query p a -> p -> IO [a]
runQuery' conn
conn Query (String, String) String
primaryKeyQuerySQL (String
scm, String
tbl)
    let primaryKeyCols :: [String]
primaryKeyCols = String -> String
normalizeColumn (String -> String) -> [String] -> [String]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> [String]
primCols
    LogChan -> String -> IO ()
putLog LogChan
lchan (String -> IO ()) -> String -> IO ()
forall a b. (a -> b) -> a -> b
$ "getPrimaryKey: primary key = " String -> String -> String
forall a. [a] -> [a] -> [a]
++ [String] -> String
forall a. Show a => a -> String
show [String]
primaryKeyCols
    [String] -> IO [String]
forall (m :: * -> *) a. Monad m => a -> m a
return [String]
primaryKeyCols

getColumns' :: IConnection conn
            => TypeMap
            -> conn
            -> LogChan
            -> String
            -> String
            -> IO ([(String, TypeQ)], [Int])
getColumns' :: TypeMap
-> conn -> LogChan -> String -> String -> IO (TypeMap, [Int])
getColumns' tmap :: TypeMap
tmap conn :: conn
conn lchan :: LogChan
lchan scm :: String
scm tbl :: String
tbl = (TypeMap, [Int])
-> ((TypeMap, [Int]) -> (TypeMap, [Int]))
-> MaybeT IO (TypeMap, [Int])
-> IO (TypeMap, [Int])
forall b a. b -> (a -> b) -> MaybeT IO a -> IO b
maybeIO ([], []) (TypeMap, [Int]) -> (TypeMap, [Int])
forall a. a -> a
id (MaybeT IO (TypeMap, [Int]) -> IO (TypeMap, [Int]))
-> MaybeT IO (TypeMap, [Int]) -> IO (TypeMap, [Int])
forall a b. (a -> b) -> a -> b
$ do
    [Columns]
cols <- IO [Columns] -> MaybeT IO [Columns]
forall (t :: (* -> *) -> * -> *) (m :: * -> *) a.
(MonadTrans t, Monad m) =>
m a -> t m a
lift (IO [Columns] -> MaybeT IO [Columns])
-> IO [Columns] -> MaybeT IO [Columns]
forall a b. (a -> b) -> a -> b
$ conn
-> Query (String, String) Columns
-> (String, String)
-> IO [Columns]
forall conn p a.
(IConnection conn, ToSql SqlValue p, FromSql SqlValue a) =>
conn -> Query p a -> p -> IO [a]
runQuery' conn
conn Query (String, String) Columns
columnsQuerySQL (String
scm, String
tbl)
    Bool -> MaybeT IO ()
forall (f :: * -> *). Alternative f => Bool -> f ()
guard (Bool -> Bool
not (Bool -> Bool) -> Bool -> Bool
forall a b. (a -> b) -> a -> b
$ [Columns] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [Columns]
cols) MaybeT IO () -> MaybeT IO () -> MaybeT IO ()
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|>
      LogChan -> String -> MaybeT IO ()
forall a. LogChan -> String -> MaybeT IO a
compileError LogChan
lchan
      ("getFields: No columns found: schema = " String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
scm
       String -> String -> String
forall a. [a] -> [a] -> [a]
++ ", table = " String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
tbl)
    let notNullIdxs :: [Int]
notNullIdxs = ((Int, Columns) -> Int) -> [(Int, Columns)] -> [Int]
forall a b. (a -> b) -> [a] -> [b]
map (Int, Columns) -> Int
forall a b. (a, b) -> a
fst ([(Int, Columns)] -> [Int])
-> ([Columns] -> [(Int, Columns)]) -> [Columns] -> [Int]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((Int, Columns) -> Bool) -> [(Int, Columns)] -> [(Int, Columns)]
forall a. (a -> Bool) -> [a] -> [a]
filter (Columns -> Bool
notNull (Columns -> Bool)
-> ((Int, Columns) -> Columns) -> (Int, Columns) -> Bool
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (Int, Columns) -> Columns
forall a b. (a, b) -> b
snd) ([(Int, Columns)] -> [(Int, Columns)])
-> ([Columns] -> [(Int, Columns)]) -> [Columns] -> [(Int, Columns)]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. [Int] -> [Columns] -> [(Int, Columns)]
forall a b. [a] -> [b] -> [(a, b)]
zip [0..] ([Columns] -> [Int]) -> [Columns] -> [Int]
forall a b. (a -> b) -> a -> b
$ [Columns]
cols
    IO () -> MaybeT IO ()
forall (t :: (* -> *) -> * -> *) (m :: * -> *) a.
(MonadTrans t, Monad m) =>
m a -> t m a
lift (IO () -> MaybeT IO ())
-> (String -> IO ()) -> String -> MaybeT IO ()
forall b c a. (b -> c) -> (a -> b) -> a -> c
. LogChan -> String -> IO ()
putLog LogChan
lchan
      (String -> MaybeT IO ()) -> String -> MaybeT IO ()
forall a b. (a -> b) -> a -> b
$  "getFields: num of columns = " String -> String -> String
forall a. [a] -> [a] -> [a]
++ Int -> String
forall a. Show a => a -> String
show ([Columns] -> Int
forall (t :: * -> *) a. Foldable t => t a -> Int
List.length [Columns]
cols)
      String -> String -> String
forall a. [a] -> [a] -> [a]
++ ", not null columns = " String -> String -> String
forall a. [a] -> [a] -> [a]
++ [Int] -> String
forall a. Show a => a -> String
show [Int]
notNullIdxs
    TypeMap
types <- (Columns -> MaybeT IO (String, TypeQ))
-> [Columns] -> MaybeT IO TypeMap
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM Columns -> MaybeT IO (String, TypeQ)
getType' [Columns]
cols
    (TypeMap, [Int]) -> MaybeT IO (TypeMap, [Int])
forall (m :: * -> *) a. Monad m => a -> m a
return (TypeMap
types, [Int]
notNullIdxs)
    where
        getType' :: Columns -> MaybeT IO (String, TypeQ)
getType' col :: Columns
col =
            Maybe (String, TypeQ) -> MaybeT IO (String, TypeQ)
forall (m :: * -> *) a. Monad m => Maybe a -> MaybeT m a
hoistMaybe (Map String TypeQ -> Columns -> Maybe (String, TypeQ)
getType (TypeMap -> Map String TypeQ
forall k a. Ord k => [(k, a)] -> Map k a
fromList TypeMap
tmap) Columns
col) MaybeT IO (String, TypeQ)
-> MaybeT IO (String, TypeQ) -> MaybeT IO (String, TypeQ)
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|>
            LogChan -> String -> MaybeT IO (String, TypeQ)
forall a. LogChan -> String -> MaybeT IO a
compileError LogChan
lchan
            ("Type mapping is not defined against MySQL type: "
             String -> String -> String
forall a. [a] -> [a] -> [a]
++ Columns -> String
Columns.dataType Columns
col)

-- | Driver implementation
driverMySQL :: IConnection conn => Driver conn
driverMySQL :: Driver conn
driverMySQL =
    Driver conn
forall conn. IConnection conn => Driver conn
emptyDriver { getFieldsWithMap :: TypeMap
-> conn -> LogChan -> String -> String -> IO (TypeMap, [Int])
getFieldsWithMap = TypeMap
-> conn -> LogChan -> String -> String -> IO (TypeMap, [Int])
forall conn.
IConnection conn =>
TypeMap
-> conn -> LogChan -> String -> String -> IO (TypeMap, [Int])
getColumns' }
                { getPrimaryKey :: conn -> LogChan -> String -> String -> IO [String]
getPrimaryKey    = conn -> LogChan -> String -> String -> IO [String]
forall conn.
IConnection conn =>
conn -> LogChan -> String -> String -> IO [String]
getPrimaryKey' }
                { driverConfig :: Config
driverConfig     = Config
config }