From ce276eee82ec0b8c4106beb4c51d6f9eb77335c4 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Sun, 13 Jan 2019 23:52:05 +0100
Subject: src: init

---
 src/Reaktor/Parser.hs | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/Reaktor/Parser.hs

(limited to 'src/Reaktor/Parser.hs')

diff --git a/src/Reaktor/Parser.hs b/src/Reaktor/Parser.hs
new file mode 100644
index 0000000..bdd2f98
--- /dev/null
+++ b/src/Reaktor/Parser.hs
@@ -0,0 +1,45 @@
+{-# 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"
-- 
cgit v1.2.3