X-Git-Url: http://git.cielonegro.org/gitweb.cgi?p=time-http.git;a=blobdiff_plain;f=Data%2FTime%2FRFC733%2FInternal.hs;h=9258e65341bfbe02cfd46e3f5166169eade8eb96;hp=d6aea4110904dcbc928f2af3f618fcad55f3b9f2;hb=4e2898d9c40d6e962a33d5d05a3aa80c10c312fc;hpb=98132c09a6383d8d8447e0307207b933f7240f5f

diff --git a/Data/Time/RFC733/Internal.hs b/Data/Time/RFC733/Internal.hs
index d6aea41..9258e65 100644
--- a/Data/Time/RFC733/Internal.hs
+++ b/Data/Time/RFC733/Internal.hs
@@ -5,11 +5,16 @@
 -- |Internal functions for "Data.Time.RFC733".
 module Data.Time.RFC733.Internal
     ( rfc733DateAndTime
+    , toAsciiBuilder
     )
     where
+import Data.Ascii (AsciiBuilder)
+import qualified Data.Ascii as A
 import Control.Applicative
 import Data.Attoparsec.Char8
+import Data.Monoid.Unicode
 import Data.Time
+import Data.Time.Calendar.WeekDate
 import Data.Time.HTTP.Common
 
 -- |Parse RFC 733 date and time strings.
@@ -106,3 +111,28 @@ zone = choice [ string "GMT" *> return (TimeZone 0 False "GMT")
               , char 'Z' *> return (TimeZone 0 False "Z")
               , read4digitsTZ
               ]
+
+-- |Convert a 'ZonedTime' to RFC 733 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
+        longWeekDayName 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 "-"
+        ⊕ show4digitsTZ timeZone