From 359ce0a3104d6407372e0dd3ba86bca71617b9a5 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Wed, 30 Sep 2026 03:38:59 +0200
Subject: refactor MdBlocks.Metadata

---
 src/MdBlocks/Metadata.hs | 50 ++++++++++++++++++++++++++++++------------------
 1 file changed, 31 insertions(+), 19 deletions(-)

diff --git a/src/MdBlocks/Metadata.hs b/src/MdBlocks/Metadata.hs
index c0b1777..607fa3f 100644
--- a/src/MdBlocks/Metadata.hs
+++ b/src/MdBlocks/Metadata.hs
@@ -1,6 +1,10 @@
 {-# LANGUAGE OverloadedStrings #-}
 
-module MdBlocks.Metadata where
+module MdBlocks.Metadata
+  ( emptyMetadata
+  , parseMetadataLine
+  )
+where
 
 import qualified Data.Map.Strict as M
 import Data.Text (Text)
@@ -10,7 +14,11 @@ import MdBlocks.Types
 
 emptyMetadata :: Metadata
 emptyMetadata =
-  Metadata Nothing Nothing M.empty
+  Metadata
+    { mdLanguage = Nothing
+    , mdId       = Nothing
+    , mdAttrs    = M.empty
+    }
 
 parseMetadataLine :: Text -> Metadata
 parseMetadataLine line =
@@ -18,21 +26,25 @@ parseMetadataLine line =
     [] ->
       emptyMetadata
 
-    (langTok:rest)
-      | T.isPrefixOf "@" langTok ->
-          Metadata
-            (Just $ T.drop 1 langTok)
-            (lookupKey "id")
-            attrs
-      | otherwise ->
+    langTok : rest
+      | not ("@" `T.isPrefixOf` langTok) ->
           emptyMetadata
-      where
-        attrs =
-          M.fromList
-            [ let (k,v) = T.breakOn "=" x
-              in (k, T.drop 1 v)
-            | x <- rest
-            , "=" `T.isInfixOf` x
-            ]
-
-        lookupKey k = M.lookup k attrs
+
+      | otherwise ->
+          Metadata
+            { mdLanguage = Just (T.drop 1 langTok)
+            , mdId       = M.lookup "id" attrs
+            , mdAttrs    = attrs
+            }
+          where
+            attrs =
+              M.fromList
+                [ parseKV tok
+                | tok <- rest
+                , "=" `T.isInfixOf` tok
+                ]
+
+parseKV :: Text -> (Text, Text)
+parseKV t =
+  let (k,v) = T.breakOn "=" t
+  in (k, T.drop 1 v)
-- 
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