Fix javascript function name generation, mostly fixes #191

and remove js-specific code in servant-foreign (code which would now be dead)

servant-foreign/src/Servant/Foreign/Inflections.hs

@@ -32,7 +32,7 @@ snakeCase :: FunctionName -> Text
 snakeCase = view snakeCaseL
 
 camelCaseL :: Getter FunctionName Text
-camelCaseL = _FunctionName . to (convert . map (replace "-" ""))
+camelCaseL = _FunctionName . to convert
   where
     convert []     = ""
     convert (p:ps) = mconcat $ p : map capitalize ps

servant-foreign/src/Servant/Foreign/Internal.hs

@@ -316,9 +316,7 @@ instance (KnownSymbol path, HasForeign lang ftype api)
       req & reqUrl . path <>~ [Segment (Static (PathSegment str))]
           & reqFuncName . _FunctionName %~ (++ [str])
     where
-      str =
-        Data.Text.map (\c -> if c == '.' then '_' else c)
-          . pack . symbolVal $ (Proxy :: Proxy path)
+      str = pack . symbolVal $ (Proxy :: Proxy path)
 
 instance HasForeign lang ftype api
   => HasForeign lang ftype (RemoteHost :> api) where

servant-foreign/test/Servant/ForeignSpec.hs

@@ -19,8 +19,6 @@ camelCaseSpec = describe "camelCase" $ do
   it "converts FunctionNames to camelCase" $ do
     camelCase (FunctionName ["post", "counter", "inc"])
       `shouldBe` "postCounterInc"
-    camelCase (FunctionName ["get", "hyphen-ated", "counter"])
-      `shouldBe` "getHyphenatedCounter"
 
 ----------------------------------------------------------------------
 

servant-js/src/Servant/JS/Angular.hs

@@ -132,7 +132,7 @@ generateAngularJSWith ngOptions opts req = "\n" <>
 
         fsep = if hasService then ":" else " ="
 
-        fname = namespace <> (functionNameBuilder opts $ req ^. reqFuncName)
+        fname = namespace <> (toValidFunctionName (functionNameBuilder opts $ req ^. reqFuncName))
 
         method = req ^. reqMethod
         url = if url' == "'" then "'/'" else url'

servant-js/src/Servant/JS/Axios.hs

@@ -120,7 +120,7 @@ generateAxiosJSWith aopts opts req = "\n" <>
                where
                   hasNoModule = moduleName opts == ""
 
-        fname = namespace <> (functionNameBuilder opts $ req ^. reqFuncName)
+        fname = namespace <> (toValidFunctionName (functionNameBuilder opts $ req ^. reqFuncName))
 
         method = T.toLower . decodeUtf8 $ req ^. reqMethod
         url = if url' == "'" then "'/'" else url'

servant-js/src/Servant/JS/Internal.hs

@@ -120,21 +120,27 @@ toValidFunctionName t =
     firstChar c = prefixOK c || Set.member c firstLetterOK
     remainder c = prefixOK c || Set.member c remainderOK
     prefixOK c = c `elem` ['$','_']
-    firstLetterOK = mconcat
+    firstLetterOK = (filterBmpChars $ mconcat
                       [ Set.lowercaseLetter
                       , Set.uppercaseLetter
                       , Set.titlecaseLetter
                       , Set.modifierLetter
                       , Set.otherLetter
                       , Set.letterNumber
-                      ]
+                      ])
     remainderOK   = firstLetterOK
-               <> mconcat
+               <> (filterBmpChars $ mconcat
                     [ Set.nonSpacingMark
                     , Set.spacingCombiningMark
                     , Set.decimalNumber
                     , Set.connectorPunctuation
-                    ]
+                    ])
+
+-- Javascript identifiers can only contain codepoints in the Basic Multilingual Plane
+-- that is, codepoints that can be encoded in UTF-16 without a surrogate pair (UCS-2)
+-- that is, codepoints that can fit in 16-bits, up to 0xffff (65535)
+filterBmpChars :: Set.CharSet -> Set.CharSet
+filterBmpChars = Set.filter (< '\65536')
 
 toJSHeader :: HeaderArg f -> Text
 toJSHeader (HeaderArg n)

servant-js/src/Servant/JS/JQuery.hs

@@ -86,7 +86,7 @@ generateJQueryJSWith opts req = "\n" <>
         namespace = if (moduleName opts) == ""
                        then "var "
                        else (moduleName opts) <> "."
-        fname = namespace <> (functionNameBuilder opts $ req ^. reqFuncName)
+        fname = namespace <> (toValidFunctionName (functionNameBuilder opts $ req ^. reqFuncName))
 
         method = req ^. reqMethod
         url = if url' == "'" then "'/'" else url'

servant-js/src/Servant/JS/Vanilla.hs

@@ -97,7 +97,7 @@ generateVanillaJSWith opts req = "\n" <>
         namespace = if moduleName opts == ""
                        then "var "
                        else (moduleName opts) <> "."
-        fname = namespace <> (functionNameBuilder opts $ req ^. reqFuncName)
+        fname = namespace <> (toValidFunctionName (functionNameBuilder opts $ req ^. reqFuncName))
 
         method = req ^. reqMethod
         url = if url' == "'" then "'/'" else url'