From 97c299fc60c7bde52b69014f0c85a5c4c73a4889 Mon Sep 17 00:00:00 2001
From: Alexander Foremny <aforemny@posteo.de>
Date: Wed, 5 Jun 2024 09:48:57 +0200
Subject: support comparing `$fileName` against literals

---
 src/Store/Query/Parser.hs  | 4 ++--
 src/Store/Query/Printer.hs | 4 +++-
 src/Store/Query/Type.hs    | 2 +-
 3 files changed, 6 insertions(+), 4 deletions(-)

(limited to 'src/Store/Query')

diff --git a/src/Store/Query/Parser.hs b/src/Store/Query/Parser.hs
index e16c926..99ddc79 100644
--- a/src/Store/Query/Parser.hs
+++ b/src/Store/Query/Parser.hs
@@ -114,9 +114,9 @@ instance IsString Query where
           ]
 
       comparison = do
-        a <- field
+        a <- P.choice [Left <$> value, Right <$> field]
         eq
-        b <- field
+        b <- P.choice [Left <$> value, Right <$> field]
         pure $ Eq a b
 
       fieldSelector =
diff --git a/src/Store/Query/Printer.hs b/src/Store/Query/Printer.hs
index 26f4e8b..cff543f 100644
--- a/src/Store/Query/Printer.hs
+++ b/src/Store/Query/Printer.hs
@@ -102,7 +102,9 @@ showWhereClauseWith wrap (Just (Or ws)) = Just (wrap (intercalate "OR" (mapMaybe
 showWhereClauseWith _ (Just (Where p)) = Just (showComparison p)
 
 showComparison :: Comparison -> String
-showComparison (Eq a b) = intercalate " " [showField a, "==", showField b]
+showComparison (Eq a b) = intercalate " " [showArg a, "==", showArg b]
+  where
+    showArg = either showValue showField
 
 showValues :: [J.Value] -> Maybe String
 showValues [] = Nothing
diff --git a/src/Store/Query/Type.hs b/src/Store/Query/Type.hs
index 7065267..912d020 100644
--- a/src/Store/Query/Type.hs
+++ b/src/Store/Query/Type.hs
@@ -62,5 +62,5 @@ data WhereClause
   deriving (Show)
 
 data Comparison
-  = Eq Field Field
+  = Eq (Either J.Value Field) (Either J.Value Field)
   deriving (Show)
-- 
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