1 files changed, 24 insertions, 0 deletions
diff --git a/tea-cleaner/TeaCleaner/Options.hs b/tea-cleaner/TeaCleaner/Options.hs
new file mode 100644
index 0000000..7353f8f
--- /dev/null
+++ b/tea-cleaner/TeaCleaner/Options.hs
@@ -0,0 +1,24 @@
+module TeaCleaner.Options
+    ( jsonOptions
+    ) where
+
+import qualified Data.Aeson.TH as Aeson
+import Prelude hiding (id)
+import Data.Char
+
+applyFirst :: (Char -> Char) -> String -> String
+applyFirst _ []     = []
+applyFirst f [x]    = [f x]
+applyFirst f (x:xs) = f x: xs
+
+-- | Generic casing for symbol separated names
+symbCase :: String -> String
+symbCase = u . applyFirst toLower
+  where u []                       = []
+        u (x:xs) | isUpper x = '_' : toLower x : u xs
+                 | otherwise = x : u xs
+
+jsonOptions :: Aeson.Options
+jsonOptions = Aeson.defaultOptions
+    { Aeson.fieldLabelModifier = symbCase
+    }