{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
module Distribution.Types.PackageId
  ( PackageIdentifier(..)
  , PackageId
  ) where

import Distribution.Compat.Prelude
import Prelude ()

import Distribution.Parsec            (Parsec (..), simpleParsec)
import Distribution.Pretty
import Distribution.Types.PackageName
import Distribution.Version           (Version, nullVersion)

import qualified Data.List.NonEmpty              as NE
import qualified Distribution.Compat.CharParsing as P
import qualified Text.PrettyPrint                as Disp

-- | Type alias so we can use the shorter name PackageId.
type PackageId = PackageIdentifier

-- | The name and version of a package.
data PackageIdentifier
    = PackageIdentifier {
        PackageIdentifier -> PackageName
pkgName    :: PackageName, -- ^The name of this package, eg. foo
        PackageIdentifier -> Version
pkgVersion :: Version -- ^the version of this package, eg 1.2
     }
     deriving (forall x. Rep PackageIdentifier x -> PackageIdentifier
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instance Binary PackageIdentifier
instance Structured PackageIdentifier

instance Pretty PackageIdentifier where
  pretty :: PackageIdentifier -> Doc
pretty (PackageIdentifier PackageName
n Version
v)
    | Version
v forall a. Eq a => a -> a -> Bool
== Version
nullVersion = forall a. Pretty a => a -> Doc
pretty PackageName
n -- if no version, don't show version.
    | Bool
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n Doc -> Doc -> Doc
<<>> Char -> Doc
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v

-- |
--
-- >>> simpleParsec "foo-bar-0" :: Maybe PackageIdentifier
-- Just (PackageIdentifier {pkgName = PackageName "foo-bar", pkgVersion = mkVersion [0]})
--
-- >>> simpleParsec "foo-bar" :: Maybe PackageIdentifier
-- Just (PackageIdentifier {pkgName = PackageName "foo-bar", pkgVersion = mkVersion []})
--
-- /Note:/ Stricter than 'Text' instance
--
-- >>> simpleParsec "foo-bar-0-0" :: Maybe PackageIdentifier
-- Nothing
--
-- >>> simpleParsec "foo-bar.0" :: Maybe PackageIdentifier
-- Nothing
--
-- >>> simpleParsec "foo-bar.4-2" :: Maybe PackageIdentifier
-- Nothing
--
-- >>> simpleParsec "1.2.3" :: Maybe PackageIdentifier
-- Nothing
--
instance Parsec PackageIdentifier where
  parsec :: forall (m :: * -> *). CabalParsing m => m PackageIdentifier
parsec = do
      NonEmpty String
xs' <- forall (m :: * -> *) a sep.
Alternative m =>
m a -> m sep -> m (NonEmpty a)
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component (forall (m :: * -> *). CharParsing m => Char -> m Char
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'-')
      (Version
v, [String]
xs) <- case forall a. Parsec a => String -> Maybe a
simpleParsec (forall a. NonEmpty a -> a
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xs') of
          Maybe Version
Nothing -> forall (m :: * -> *) a. Monad m => a -> m a
return (Version
nullVersion, forall (t :: * -> *) a. Foldable t => t a -> [a]
toList NonEmpty String
xs') -- all components are version
          Just Version
v  -> forall (m :: * -> *) a. Monad m => a -> m a
return (Version
v, forall a. NonEmpty a -> [a]
NE.init NonEmpty String
xs')
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not (forall (t :: * -> *) a. Foldable t => t a -> Bool
null [String]
xs) Bool -> Bool -> Bool
&& forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all (\String
c ->  forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all (forall a. Eq a => a -> a -> Bool
/= Char
'.') String
c Bool -> Bool -> Bool
&& Bool -> Bool
not (forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all Char -> Bool
isDigit String
c)) [String]
xs
      then forall (m :: * -> *) a. Monad m => a -> m a
return forall a b. (a -> b) -> a -> b
$ PackageName -> Version -> PackageIdentifier
PackageIdentifier (String -> PackageName
mkPackageName (forall a. [a] -> [[a]] -> [a]
intercalate  String
"-" [String]
xs)) Version
v
      else forall (m :: * -> *) a. MonadFail m => String -> m a
fail String
"all digits or a dot in a portion of package name"
    where
      component :: m String
component = forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m String
P.munch1 (\Char
c ->  Char -> Bool
isAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'.')

instance NFData PackageIdentifier where
    rnf :: PackageIdentifier -> ()
rnf (PackageIdentifier PackageName
name Version
version) = forall a. NFData a => a -> ()
rnf PackageName
name seq :: forall a b. a -> b -> b
`seq` forall a. NFData a => a -> ()
rnf Version
version