{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric #-}
module Distribution.SPDX.LicenseReference (
    LicenseRef,
    licenseRef,
    licenseDocumentRef,
    mkLicenseRef,
    mkLicenseRef',
    ) where

import Prelude ()
import Distribution.Compat.Prelude

import Distribution.Utils.Generic (isAsciiAlphaNum)
import Distribution.Pretty
import Distribution.Parsec

import qualified Distribution.Compat.CharParsing as P
import qualified Text.PrettyPrint as Disp

-- | A user defined license reference denoted by @LicenseRef-[idstring]@ (for a license not on the SPDX License List);
data LicenseRef = LicenseRef
    { LicenseRef -> Maybe String
_lrDocument :: !(Maybe String)
    , LicenseRef -> String
_lrLicense  :: !String
    }
  deriving (Int -> LicenseRef -> ShowS
[LicenseRef] -> ShowS
LicenseRef -> String
(Int -> LicenseRef -> ShowS)
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forall a.
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-- | License reference.
licenseRef :: LicenseRef -> String
licenseRef :: LicenseRef -> String
licenseRef = LicenseRef -> String
_lrLicense

-- | Document reference.
licenseDocumentRef :: LicenseRef -> Maybe String
licenseDocumentRef :: LicenseRef -> Maybe String
licenseDocumentRef = LicenseRef -> Maybe String
_lrDocument

instance Binary LicenseRef
instance Structured LicenseRef

instance NFData LicenseRef where
    rnf :: LicenseRef -> ()
rnf (LicenseRef Maybe String
d String
l) = Maybe String -> ()
forall a. NFData a => a -> ()
rnf Maybe String
d () -> () -> ()
forall a b. a -> b -> b
`seq` String -> ()
forall a. NFData a => a -> ()
rnf String
l

instance Pretty LicenseRef where
    pretty :: LicenseRef -> Doc
pretty (LicenseRef Maybe String
Nothing String
l) = String -> Doc
Disp.text String
"LicenseRef-" Doc -> Doc -> Doc
<<>> String -> Doc
Disp.text String
l
    pretty (LicenseRef (Just String
d) String
l) =
        String -> Doc
Disp.text String
"DocumentRef-" Doc -> Doc -> Doc
<<>> String -> Doc
Disp.text String
d Doc -> Doc -> Doc
<<>> Char -> Doc
Disp.char Char
':' Doc -> Doc -> Doc
<<>> String -> Doc
Disp.text String
"LicenseRef-" Doc -> Doc -> Doc
<<>> String -> Doc
Disp.text String
l

instance Parsec LicenseRef where
    parsec :: forall (m :: * -> *). CabalParsing m => m LicenseRef
parsec = m LicenseRef
name m LicenseRef -> m LicenseRef -> m LicenseRef
forall a. m a -> m a -> m a
forall (f :: * -> *) a. Alternative f => f a -> f a -> f a
<|> m LicenseRef
doc
      where
        name :: m LicenseRef
name = do
            String
_ <- String -> m String
forall (m :: * -> *). CharParsing m => String -> m String
P.string String
"LicenseRef-"
            String
n <- m Char -> m String
forall a. m a -> m [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
some (m Char -> m String) -> m Char -> m String
forall a b. (a -> b) -> a -> b
$ (Char -> Bool) -> m Char
forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m Char
P.satisfy ((Char -> Bool) -> m Char) -> (Char -> Bool) -> m Char
forall a b. (a -> b) -> a -> b
$ \Char
c -> Char -> Bool
isAsciiAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char
'-' Bool -> Bool -> Bool
|| Char
c Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char
'.'
            LicenseRef -> m LicenseRef
forall a. a -> m a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (Maybe String -> String -> LicenseRef
LicenseRef Maybe String
forall a. Maybe a
Nothing String
n)

        doc :: m LicenseRef
doc = do
            String
_ <- String -> m String
forall (m :: * -> *). CharParsing m => String -> m String
P.string String
"DocumentRef-"
            String
d <- m Char -> m String
forall a. m a -> m [a]
forall (f :: * -> *) a. Alternative f => f a -> f [a]
some (m Char -> m String) -> m Char -> m String
forall a b. (a -> b) -> a -> b
$ (Char -> Bool) -> m Char
forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m Char
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forall a b. (a -> b) -> a -> b
$ \Char
c -> Char -> Bool
isAsciiAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c Char -> Char -> Bool
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== Char
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|| Char
c Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char
'.'
            Char
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forall (m :: * -> *). CharParsing m => Char -> m Char
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forall (m :: * -> *). CharParsing m => String -> m String
P.string String
"LicenseRef-"
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forall a b. (a -> b) -> a -> b
$ (Char -> Bool) -> m Char
forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m Char
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forall a b. (a -> b) -> a -> b
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c Bool -> Bool -> Bool
|| Char
c Char -> Char -> Bool
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|| Char
c Char -> Char -> Bool
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            LicenseRef -> m LicenseRef
forall a. a -> m a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (Maybe String -> String -> LicenseRef
LicenseRef (String -> Maybe String
forall a. a -> Maybe a
Just String
d) String
n)

-- | Create 'LicenseRef' from optional document ref and name.
mkLicenseRef :: Maybe String -> String -> Maybe LicenseRef
mkLicenseRef :: Maybe String -> String -> Maybe LicenseRef
mkLicenseRef Maybe String
d String
l = do
    Maybe String
d' <- (String -> Maybe String) -> Maybe String -> Maybe (Maybe String)
forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
forall (f :: * -> *) a b.
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traverse String -> Maybe String
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checkIdString Maybe String
d
    String
l' <- String -> Maybe String
forall {t :: * -> *}. Foldable t => t Char -> Maybe (t Char)
checkIdString String
l
    LicenseRef -> Maybe LicenseRef
forall a. a -> Maybe a
forall (f :: * -> *) a. Applicative f => a -> f a
pure (Maybe String -> String -> LicenseRef
LicenseRef Maybe String
d' String
l')
  where
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checkIdString t Char
s
        | (Char -> Bool) -> t Char -> Bool
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all (\Char
c -> Char -> Bool
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|| Char
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forall a. Eq a => a -> a -> Bool
== Char
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|| Char
c Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char
'.') t Char
s = t Char -> Maybe (t Char)
forall a. a -> Maybe a
Just t Char
s
        | Bool
otherwise = Maybe (t Char)
forall a. Maybe a
Nothing

-- | Like 'mkLicenseRef' but convert invalid characters into @-@.
mkLicenseRef' :: Maybe String -> String -> LicenseRef
mkLicenseRef' :: Maybe String -> String -> LicenseRef
mkLicenseRef' Maybe String
d String
l = Maybe String -> String -> LicenseRef
LicenseRef (ShowS -> Maybe String -> Maybe String
forall a b. (a -> b) -> Maybe a -> Maybe b
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap ShowS
f Maybe String
d) (ShowS
f String
l)
  where
    f :: ShowS
f = (Char -> Char) -> ShowS
forall a b. (a -> b) -> [a] -> [b]
map Char -> Char
g
    g :: Char -> Char
g Char
c | Char -> Bool
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|| Char
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== Char
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|| Char
c Char -> Char -> Bool
forall a. Eq a => a -> a -> Bool
== Char
'.' = Char
c
        | Bool
otherwise                                 = Char
'-'