{-# 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
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [LicenseRef] -> ShowS
$cshowList :: [LicenseRef] -> ShowS
show :: LicenseRef -> String
$cshow :: LicenseRef -> String
showsPrec :: Int -> LicenseRef -> ShowS
$cshowsPrec :: Int -> LicenseRef -> ShowS
Show, ReadPrec [LicenseRef]
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Int -> ReadS LicenseRef
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forall a.
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-> ReadS [a] -> ReadPrec a -> ReadPrec [a] -> Read a
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$creadListPrec :: ReadPrec [LicenseRef]
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/= :: LicenseRef -> LicenseRef -> Bool
$c/= :: LicenseRef -> LicenseRef -> Bool
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min :: LicenseRef -> LicenseRef -> LicenseRef
$cmin :: LicenseRef -> LicenseRef -> LicenseRef
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forall u. Int -> (forall d. Data d => d -> u) -> LicenseRef -> u
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gmapMo :: forall (m :: * -> *).
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$cto :: forall x. Rep LicenseRef x -> LicenseRef
$cfrom :: forall x. LicenseRef -> Rep LicenseRef x
Generic)

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

        doc :: m LicenseRef
doc = do
            String
_ <- forall (m :: * -> *). CharParsing m => String -> m String
P.string String
"DocumentRef-"
            String
d <- forall (f :: * -> *) a. Alternative f => f a -> f [a]
some forall a b. (a -> b) -> a -> b
$ forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m Char
P.satisfy forall a b. (a -> b) -> a -> b
$ \Char
c -> Char -> Bool
isAsciiAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'-' Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'.'
            Char
_ <- forall (m :: * -> *). CharParsing m => Char -> m Char
P.char Char
':'
            String
_ <- forall (m :: * -> *). CharParsing m => String -> m String
P.string String
"LicenseRef-"
            String
n <- forall (f :: * -> *) a. Alternative f => f a -> f [a]
some forall a b. (a -> b) -> a -> b
$ forall (m :: * -> *). CharParsing m => (Char -> Bool) -> m Char
P.satisfy forall a b. (a -> b) -> a -> b
$ \Char
c -> Char -> Bool
isAsciiAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'-' Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'.'
            forall (f :: * -> *) a. Applicative f => a -> f a
pure (Maybe String -> String -> LicenseRef
LicenseRef (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' <- forall (t :: * -> *) (f :: * -> *) a b.
(Traversable t, Applicative f) =>
(a -> f b) -> t a -> f (t b)
traverse forall {t :: * -> *}. Foldable t => t Char -> Maybe (t Char)
checkIdString Maybe String
d
    String
l' <- forall {t :: * -> *}. Foldable t => t Char -> Maybe (t Char)
checkIdString String
l
    forall (f :: * -> *) a. Applicative f => a -> f a
pure (Maybe String -> String -> LicenseRef
LicenseRef Maybe String
d' String
l')
  where
    checkIdString :: t Char -> Maybe (t Char)
checkIdString t Char
s
        | forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
all (\Char
c -> Char -> Bool
isAsciiAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'-' Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'.') t Char
s = forall a. a -> Maybe a
Just t Char
s
        | Bool
otherwise = 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 (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 = forall a b. (a -> b) -> [a] -> [b]
map Char -> Char
g
    g :: Char -> Char
g Char
c | Char -> Bool
isAsciiAlphaNum Char
c Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'-' Bool -> Bool -> Bool
|| Char
c forall a. Eq a => a -> a -> Bool
== Char
'.' = Char
c
        | Bool
otherwise                                 = Char
'-'