blob: 6667bc343bbeb243a156dcba4448b85aa0ecf383 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
{- types for SQL databases
-
- Copyright 2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE TemplateHaskell #-}
module Database.Types where
import Database.Persist.TH
import Data.Maybe
import Types.Key
import Utility.InodeCache
-- A serialized Key
newtype SKey = SKey String
deriving (Show, Read)
toSKey :: Key -> SKey
toSKey = SKey . key2file
fromSKey :: SKey -> Key
fromSKey (SKey s) = fromMaybe (error $ "bad serialied Key " ++ s) (file2key s)
derivePersistField "SKey"
-- A Key index. More efficient than SKey, but its Read instance does not
-- work when it's used in any kind of complex data structure.
newtype IKey = IKey String
instance Read IKey where
readsPrec _ s = [(IKey s, "")]
instance Show IKey where
show (IKey s) = s
toIKey :: Key -> IKey
toIKey = IKey . key2file
fromIKey :: IKey -> Key
fromIKey (IKey s) = fromMaybe (error $ "bad serialied Key " ++ s) (file2key s)
derivePersistField "IKey"
-- A serialized InodeCache
newtype SInodeCache = I String
deriving (Show, Read)
toSInodeCache :: InodeCache -> SInodeCache
toSInodeCache = I . showInodeCache
fromSInodeCache :: SInodeCache -> InodeCache
fromSInodeCache (I s) = fromMaybe (error $ "bad serialied InodeCache " ++ s) (readInodeCache s)
derivePersistField "SInodeCache"
|
