X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=time-http.git;a=blobdiff_plain;f=Data%2FTime%2FRFC1123%2FInternal.hs;h=9fd1e83247d55f556edc07e5fe001fbf48a0da2f;hp=b7bb6c9a3521056473d6da77c6b74cc3ed251690;hb=2371481fd02415a8a99297679c003b8c70be4f8b;hpb=82afb594c5b4254385435491700befcbea185a5d

diff --git a/Data/Time/RFC1123/Internal.hs b/Data/Time/RFC1123/Internal.hs
index b7bb6c9..9fd1e83 100644
--- a/Data/Time/RFC1123/Internal.hs
+++ b/Data/Time/RFC1123/Internal.hs
@@ -1,40 +1,74 @@
-{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE
+    OverloadedStrings
+  , UnicodeSyntax
+  #-}
+-- |Internal functions for "Data.Time.RFC1123".
 module Data.Time.RFC1123.Internal
     ( rfc1123DateAndTime
+    , toAsciiBuilder
     )
     where
-import Control.Monad
-import Data.Fixed
+import Data.Ascii (AsciiBuilder)
+import qualified Data.Ascii as A
+import Data.Attoparsec.Char8
+import Data.Convertible.Base
+import Data.Monoid.Unicode
+import Data.Tagged
 import Data.Time
 import Data.Time.Calendar.WeekDate
 import Data.Time.HTTP.Common
-import Data.Time.RFC822.Internal
+import Data.Time.RFC822
 
--- |This is a parsec parser for RFC 1123 date and time strings.
-rfc1123DateAndTime :: Stream s m Char => ParsecT s u m ZonedTime
+-- |Parse an RFC 1123 date and time string.
+rfc1123DateAndTime ∷ Parser ZonedTime
 rfc1123DateAndTime = dateTime
 
-dateTime :: Stream s m Char => ParsecT s u m ZonedTime
-dateTime = do weekDay <- optionMaybe $
-                         do w <- shortWeekDayNameP
-                            _ <- string ", "
+dateTime ∷ Parser ZonedTime
+dateTime = do weekDay ← optionMaybe $
+                         do w ← shortWeekDayNameP
+                            _ ← string ", "
                             return w
-              gregDay <- date
+              gregDay ← date
               case weekDay of
                 Nothing
-                    -> return () -- No day in week exists.
+                    → return ()
                 Just givenWD
-                    -> assertWeekDayIsGood givenWD gregDay
-              (tod, timeZone) <- rfc822time
+                    → assertWeekDayIsGood givenWD gregDay
+              (tod, timeZone) ← rfc822Time
               let lt = LocalTime gregDay tod
                   zt = ZonedTime lt timeZone
               return zt
 
-date :: Stream s m Char => ParsecT s u m Day
-date = do day   <- read2
-          _     <- char ' '
-          month <- shortMonthNameP
-          _     <- char ' '
-          year  <- read4
-          _     <- char ' '
+date ∷ Parser Day
+date = do day   ← read2
+          _     ← char ' '
+          month ← shortMonthNameP
+          _     ← char ' '
+          year  ← read4
+          _     ← char ' '
           assertGregorianDateIsGood year month day
+
+-- |Convert a 'ZonedTime' to RFC 1123 date and time string.
+toAsciiBuilder ∷ ZonedTime → AsciiBuilder
+toAsciiBuilder zonedTime
+    = let localTime          = zonedTimeToLocalTime zonedTime
+          timeZone           = zonedTimeZone zonedTime
+          (year, month, day) = toGregorian (localDay localTime)
+          (_, _, week)       = toWeekDate  (localDay localTime)
+          timeOfDay          = localTimeOfDay localTime
+      in
+        shortWeekDayName week
+        ⊕ A.toAsciiBuilder ", "
+        ⊕ show2 day
+        ⊕ A.toAsciiBuilder " "
+        ⊕ shortMonthName month
+        ⊕ A.toAsciiBuilder " "
+        ⊕ show4 year
+        ⊕ A.toAsciiBuilder " "
+        ⊕ show2 (todHour timeOfDay)
+        ⊕ A.toAsciiBuilder ":"
+        ⊕ show2 (todMin timeOfDay)
+        ⊕ A.toAsciiBuilder ":"
+        ⊕ show2 (floor (todSec timeOfDay) ∷ Int)
+        ⊕ A.toAsciiBuilder " "
+        ⊕ untag (cs timeZone ∷ Tagged RFC822 AsciiBuilder)