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-rw-r--r--src/Reaktor/Parser.hs45
1 files changed, 45 insertions, 0 deletions
diff --git a/src/Reaktor/Parser.hs b/src/Reaktor/Parser.hs
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+{-# LANGUAGE OverloadedStrings #-}
+module Reaktor.Parser where
+
+import Control.Applicative
+import Data.Attoparsec.ByteString.Char8
+import qualified Data.ByteString.Char8 as BS
+import qualified Data.Char
+import Reaktor.Types
+
+
+prefix :: Parser Prefix
+prefix = BS.pack <$> many (satisfy Data.Char.isAlphaNum <|>
+ satisfy (flip elem (":.-@/!~[]\\`_^{|}" :: String)))
+
+command :: Parser Command
+command = BS.pack <$> many1 (satisfy Data.Char.isAlphaNum)
+
+nospcrlfcl :: Parser Char
+nospcrlfcl =
+ satisfy (flip notElem ("\NUL\CR\LF :" :: String)) <?> "nospcrlfcl"
+
+middle :: Parser Param
+middle =
+ BS.pack <$> ((:) <$> nospcrlfcl <*> many (char ':' <|> nospcrlfcl))
+ <?> "middle"
+
+trailing :: Parser Param
+trailing =
+ BS.pack <$> many (char ':' <|> char ' ' <|> nospcrlfcl)
+ <?> "trailing"
+
+params :: Parser [Param]
+params = (do
+ a <- many (char ' ' *> middle)
+ b <- optional (char ' ' *> char ':' *> trailing)
+ return $ a <> (maybe [] (:[]) b))
+ <?> "params"
+
+message :: Parser Message
+message =
+ Message
+ <$> optional (char ':' *> prefix <* char ' ')
+ <*> command
+ <*> params
+ <* string "\r\n"