Data.Time.{RFC1123,Asctime} now compiles.

[time-http.git] / Data / Time / RFC1123.hs

diff --git a/Data/Time/RFC1123.hs b/Data/Time/RFC1123.hs
index abb0a6d53e882eee4e70aaf27e3ea928a1cbce92..fb7839d034bbc9dc7aaae2369170f00e59a568f8 100644 (file)
--- a/Data/Time/RFC1123.hs
+++ b/Data/Time/RFC1123.hs
@@ -1,52 +1,43 @@
+{-# LANGUAGE
+    UnicodeSyntax
+  #-}
+-- |This module provides functions to parse and format RFC 1123 date
+-- and time formats.
+--
+-- The format is basically same as RFC 822, but the syntax for @date@
+-- is changed from:
+--
+-- > year ::= 2DIGIT
+--
+-- to:
+--
+-- > year ::= 4DIGIT
 module Data.Time.RFC1123
-    ( format
-    , parse
+    ( -- * Formatting
+      toAscii
+    , toAsciiBuilder
+
+      -- * Parsing
+    , fromAscii
+    , rfc1123DateAndTime
     )
     where
-
-import qualified Text.Parsec as P
-
+import Data.Ascii (Ascii)
+import qualified Data.Ascii as A
+import qualified Data.Attoparsec.Char8 as P
 import Data.Time
-import Data.Time.Calendar.WeekDate
-import Data.Time.HTTP.Common
-import Data.Time.RFC1123.Parsec
-
-{-
-         The syntax for the date is hereby changed to:
-
-            date = 1*2DIGIT month 2*4DIGIT
--}
+import Data.Time.RFC1123.Internal
+import Prelude.Unicode
 
-format :: ZonedTime -> String
-format zonedTime
-    = let localTime          = zonedTimeToLocalTime zonedTime
-          timeZone           = zonedTimeZone zonedTime
-          (year, month, day) = toGregorian (localDay localTime)
-          (_, _, week)       = toWeekDate  (localDay localTime)
-          timeOfDay          = localTimeOfDay localTime
-      in
-        concat [ shortWeekDayName week
-               , ", "
-               , show2 day
-               , " "
-               , shortMonthName month
-               , " "
-               , show4 year
-               , " "
-               , show2 (todHour timeOfDay)
-               , ":"
-               , show2 (todMin timeOfDay)
-               , ":"
-               , show2 (floor (todSec timeOfDay))
-               , " "
-               , show4digitsTZ timeZone
-               ]
+-- |Convert a 'ZonedTime' to RFC 1123 date and time string.
+toAscii ∷ ZonedTime → Ascii
+toAscii = A.fromAsciiBuilder ∘ toAsciiBuilder
 
-parse :: String -> Maybe ZonedTime
-parse src = case P.parse p "" src of
-              Right zt -> Just zt
-              Left  _  -> Nothing
+-- |Parse an RFC 1123 date and time string. When the string can't be
+-- parsed, it returns @'Left' err@.
+fromAscii ∷ Ascii → Either String ZonedTime
+fromAscii = P.parseOnly p ∘ A.toByteString
     where
-      p = do zt <- rfc1123DateAndTime
-             _  <- P.eof
+      p = do zt ← rfc1123DateAndTime
+             P.endOfInput
              return zt