RFC822

[time-http.git] / Data / Time / RFC822 / Internal.hs

diff --git a/Data/Time/RFC822/Internal.hs b/Data/Time/RFC822/Internal.hs
deleted file mode 100644 (file)
index 607cf88..0000000
--- a/Data/Time/RFC822/Internal.hs
+++ /dev/null
@@ -1,121 +0,0 @@
-{-# LANGUAGE
-    OverloadedStrings
-  , UnicodeSyntax
-  #-}
--- |Internal functions for "Data.Time.RFC822".
-module Data.Time.RFC822.Internal
-    ( rfc822DateAndTime
-    , rfc822time
-    , showRFC822TimeZone
-    , toAsciiBuilder
-    )
-    where
-import Control.Applicative
-import Data.Ascii (AsciiBuilder)
-import qualified Data.Ascii as A
-import Data.Attoparsec.Char8
-import Data.Monoid.Unicode
-import Data.Time
-import Data.Time.Calendar.WeekDate
-import Data.Time.HTTP.Common
-import Prelude.Unicode
-
--- |Parse an RFC 822 date and time string.
-rfc822DateAndTime ∷ Parser ZonedTime
-rfc822DateAndTime = dateTime
-
-dateTime ∷ Parser ZonedTime
-dateTime = do weekDay ← optionMaybe $
-                        do w ← shortWeekDayNameP
-                           _ ← string ", "
-                           return w
-              gregDay ← date
-              case weekDay of
-                Nothing
-                    -> return ()
-                Just givenWD
-                    -> assertWeekDayIsGood givenWD gregDay
-              (tod, timeZone) ← rfc822time
-              let lt = LocalTime gregDay tod
-                  zt = ZonedTime lt timeZone
-              return zt
-
-date ∷ Parser Day
-date = do day   ← read2
-          _     ← char ' '
-          month ← shortMonthNameP
-          _     ← char ' '
-          year  ← (+ 1900) <$> read2
-          _     ← char ' '
-          assertGregorianDateIsGood year month day
-
--- |Parse the time and time zone of an RFC 822 date and time string.
-rfc822time ∷ Parser (TimeOfDay, TimeZone)
-rfc822time = do tod ← hms
-                _   ← char ' '
-                tz  ← zone
-                return (tod, tz)
-
-hms ∷ Parser TimeOfDay
-hms = do hour   ← read2
-         minute ← char ':' *> read2
-         second ← option 0 (char ':' *> read2)
-         assertTimeOfDayIsGood hour minute second
-
-zone ∷ Parser TimeZone
-zone = choice [ string "UT"  *> return (TimeZone 0 False "UT" )
-              , string "GMT" *> return (TimeZone 0 False "GMT")
-              , char 'E'
-                *> choice [ string "ST" *> return (TimeZone ((-5) * 60) False "EST")
-                          , string "DT" *> return (TimeZone ((-4) * 60) True  "EDT")
-                          ]
-              , char 'C'
-                *> choice [ string "ST" *> return (TimeZone ((-6) * 60) False "CST")
-                          , string "DT" *> return (TimeZone ((-5) * 60) True  "CDT")
-                          ]
-              , char 'M'
-                *> choice [ string "ST" *> return (TimeZone ((-7) * 60) False "MST")
-                          , string "DT" *> return (TimeZone ((-6) * 60) True  "MDT")
-                          , return (TimeZone ((-12) * 60) False "M")
-                          ]
-              , char 'P'
-                *> choice [ string "ST" *> return (TimeZone ((-8) * 60) False "PST")
-                          , string "DT" *> return (TimeZone ((-7) * 60) True  "PDT")
-                          ]
-              , char 'Z' *> return (TimeZone 0           False "Z")
-              , char 'A' *> return (TimeZone ((-1) * 60) False "A")
-              , char 'N' *> return (TimeZone (  1  * 60) False "N")
-              , char 'Y' *> return (TimeZone ( 12  * 60) False "Y")
-              , read4digitsTZ
-              ]
-
--- |No need to explain.
-showRFC822TimeZone ∷ TimeZone → AsciiBuilder
-showRFC822TimeZone tz
-    | timeZoneMinutes tz ≡ 0 = A.toAsciiBuilder "GMT"
-    | otherwise              = show4digitsTZ tz
-
--- |Convert a 'ZonedTime' to RFC 822 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 " "
-        ⊕ show2 (year `mod` 100)
-        ⊕ A.toAsciiBuilder " "
-        ⊕ show2 (todHour timeOfDay)
-        ⊕ A.toAsciiBuilder ":"
-        ⊕ show2 (todMin timeOfDay)
-        ⊕ A.toAsciiBuilder ":"
-        ⊕ show2 (floor (todSec timeOfDay) ∷ Int)
-        ⊕ A.toAsciiBuilder " "
-        ⊕ showRFC822TimeZone timeZone