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{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE NoImplicitPrelude #-}
module Biz.Namespace
( Namespace (..),
Ext (..),
fromPath,
toPath,
toModule,
fromHaskellContent,
fromHaskellModule,
toHaskellModule,
toSchemeModule,
isCab,
groupByExt,
)
where
import Alpha
import qualified Data.Aeson as Aeson
import qualified Data.Aeson.Types as Aeson
import qualified Data.Char as Char
import qualified Data.List as List
import qualified Data.List.Split as List
import qualified Data.Map as Map
import qualified Data.Text as Text
import qualified Text.Regex.Applicative as Regex
data Ext
= C
| Css
| Hs
| Json
| Keys
| Lisp
| Md
| Nix
| None
| Py
| Rs
| Scm
| Sh
deriving (Eq, Show, Generic, Aeson.ToJSON, Ord)
data Namespace = Namespace {path :: [String], ext :: Ext}
deriving (Eq, Show, Generic, Aeson.ToJSON, Ord)
instance Aeson.ToJSONKey Namespace where
toJSONKey = Aeson.toJSONKeyText (Text.pack <. toPath)
fromPath :: String -> String -> Maybe Namespace
fromPath bizRoot absPath =
List.stripPrefix bizRoot absPath
+> List.stripPrefix "/"
+> Regex.match (Namespace </ rePath <* dot <*> reExt)
toPath :: Namespace -> FilePath
toPath (Namespace parts ext) =
joinWith "/" parts <> toExt ext
toExt :: Ext -> String
toExt =
("." <>) <. \case
C -> "c"
Css -> "css"
Hs -> "hs"
Json -> "json"
Keys -> "pub"
Lisp -> "lisp"
Md -> "md"
Nix -> "nix"
None -> "none"
Py -> "py"
Rs -> "rs"
Scm -> "scm"
Sh -> "sh"
fromHaskellContent :: String -> Maybe Namespace
fromHaskellContent c = case Regex.findFirstInfix haskellModule c of
Nothing -> Nothing
Just (_, Namespace {..}, _) -> Just <| Namespace (filter (/= ".") path) ext
where
haskellModule =
Namespace
</ (Regex.string "\nmodule " *> Regex.many (name <|> dot))
<*> pure Hs
toModule :: Namespace -> String
toModule (Namespace parts Hs) = joinWith "." parts
toModule (Namespace parts Py) = joinWith "." parts
toModule (Namespace parts Scm) = "(" ++ joinWith " " parts ++ ")"
toModule (Namespace parts Rs) = joinWith "::" parts
toModule (Namespace parts C) = joinWith "/" parts <> ".c"
toModule (Namespace {..}) = panic <| "toModule not implemented for " <> show ext
toHaskellModule :: Namespace -> String
toHaskellModule = toModule
fromHaskellModule :: String -> Namespace
fromHaskellModule s = Namespace (List.splitOn "." s) Hs
toSchemeModule :: Namespace -> String
toSchemeModule = toModule
dot :: Regex.RE Char String
dot = Regex.some <| Regex.sym '.'
name :: Regex.RE Char String
name =
Regex.many (Regex.psym Char.isUpper)
<> Regex.many (Regex.psym (\c -> Char.isAlphaNum c || (c == '_')))
rePath :: Regex.RE Char [String]
rePath = Regex.many (name <* Regex.string "/" <|> name)
reExt :: Regex.RE Char Ext
reExt =
C <$ Regex.string "c"
<|> Css <$ Regex.string "css"
<|> Hs <$ Regex.string "hs"
<|> Json <$ Regex.string "json"
<|> Keys <$ Regex.string "pub"
<|> Lisp <$ Regex.string "lisp"
<|> Md <$ Regex.string "md"
<|> Nix <$ Regex.string "nix"
<|> Py <$ Regex.string "py"
<|> Rs <$ Regex.string "rs"
<|> Scm <$ Regex.string "scm"
<|> Sh <$ Regex.string "sh"
-- | The cab dir is for temporary files and build outputs, not for source
-- inputs.
isCab :: FilePath -> Bool
isCab ('_' : _) = True
isCab fp = "/_/" `List.isInfixOf` fp
-- | Group a list of Namespaces keyed by their extensions
groupByExt :: [Namespace] -> Map Ext [Namespace]
groupByExt ns's = Map.fromListWith (++) [(ext ns, [ns]) | ns <- ns's]
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