From c8ab97e77c8ab56b9835d9f260dc222a10e9b3c6 Mon Sep 17 00:00:00 2001
From: Alexander Foremny <aforemny@posteo.de>
Date: Mon, 18 Dec 2023 07:38:22 +0100
Subject: feat: add support for c, elm, nix, shell

---
 app/Comment/Language.hs | 51 ++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 38 insertions(+), 13 deletions(-)

(limited to 'app/Comment/Language.hs')

diff --git a/app/Comment/Language.hs b/app/Comment/Language.hs
index 925cf56..7a9963f 100644
--- a/app/Comment/Language.hs
+++ b/app/Comment/Language.hs
@@ -1,6 +1,8 @@
+{-# LANGUAGE DerivingStrategies #-}
+
 module Comment.Language
   ( Language (..),
-    fromExtension,
+    fromPath,
     parser,
     lineStart,
     block,
@@ -10,31 +12,54 @@ where
 
 import Control.Exception (throw)
 import Data.Binary (Binary)
+import Data.Languages qualified as L
+import Data.List.NonEmpty qualified as N
+import Data.Maybe (fromMaybe)
 import Data.Text qualified as T
 import Exception qualified as E
 import Foreign.Ptr (Ptr)
 import GHC.Generics (Generic)
 import TreeSitter qualified as S
 
-data Language
-  = Haskell
-  deriving (Eq, Show, Generic, Binary)
+newtype Language = Language {languageKey :: L.LanguageKey}
+  deriving (Eq, Show, Generic)
+  deriving newtype (Binary)
 
-fromExtension :: String -> Language
-fromExtension ".hs" = Haskell
-fromExtension ext = throw $ E.UnknownFileExtension ext
+fromPath :: FilePath -> N.NonEmpty Language
+fromPath fp =
+  fromMaybe (throw $ E.UnknownFile fp)
+    . N.nonEmpty
+    . map (Language . L.languageName)
+    $ L.languagesForPath fp
 
--- TODO add languages elm, shell, nix
+-- TODO Add support for all tree-sitter supported languages
 --
--- @supersedes add-support-for-all-tree-grepper-supported-files
+-- @backlog
 parser :: Language -> Ptr S.Language
-parser Haskell = S.tree_sitter_haskell
+parser (Language "C") = S.tree_sitter_c
+parser (Language "Elm") = S.tree_sitter_elm
+parser (Language "Haskell") = S.tree_sitter_haskell
+parser (Language "Nix") = S.tree_sitter_nix
+parser (Language "Shell") = S.tree_sitter_bash
+parser (Language {languageKey}) = throw (E.UnsupportedLanguage languageKey)
 
 lineStart :: Language -> T.Text
-lineStart Haskell = "--"
+lineStart (Language "C") = "//"
+lineStart (Language "Elm") = "--"
+lineStart (Language "Haskell") = "--"
+lineStart (Language "Nix") = "#"
+lineStart (Language "Shell") = "#"
+lineStart (Language {languageKey}) = throw (E.UnsupportedLanguage languageKey)
 
 block :: Language -> Maybe ([T.Text], T.Text)
-block Haskell = Just (["{-"], "-}")
+block (Language "C") = Just (["/*"], "*/")
+block (Language "Elm") = Just (["{-|", "{-"], "-}")
+block (Language "Haskell") = Just (["{-"], "-}")
+block (Language "Nix") = Just (["/*"], "*/")
+block (Language "Shell") = Nothing
+block (Language {languageKey}) = throw (E.UnsupportedLanguage languageKey)
 
 nodeTypes :: Language -> [String]
-nodeTypes Haskell = ["comment"]
+nodeTypes (Language "Haskell") = ["comment"]
+nodeTypes (Language "Shell") = ["comment"]
+nodeTypes (Language {languageKey}) = throw (E.UnsupportedLanguage languageKey)
-- 
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