+++ /dev/null
-{-# LANGUAGE
- OverloadedStrings
- , UnicodeSyntax
- #-}
--- |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
-import Data.Time.RFC822.Internal hiding (toAsciiBuilder)
-
--- |Parse RFC 733 date and time strings.
-rfc733DateAndTime ∷ Parser ZonedTime
-rfc733DateAndTime = dateTime
-
-dateTime ∷ Parser ZonedTime
-dateTime = do weekDay ← optionMaybe $
- do w ← longWeekDayNameP
- <|>
- shortWeekDayNameP
- _ ← string ", "
- return w
- gregDay ← date
- case weekDay of
- Nothing
- → return ()
- Just givenWD
- → assertWeekDayIsGood givenWD gregDay
- (tod, timeZone) ← time
- let lt = LocalTime gregDay tod
- zt = ZonedTime lt timeZone
- return zt
-
-date ∷ Parser Day
-date = do day ← read2
- _ ← char '-' <|> char ' '
- month ← try longMonthNameP
- <|>
- shortMonthNameP
- _ ← char '-' <|> char ' '
- year ← try read4
- <|>
- (+ 1900) <$> read2
- _ ← char ' '
- assertGregorianDateIsGood year month day
-
-time ∷ Parser (TimeOfDay, TimeZone)
-time = do tod ← hms
- _ ← char '-' <|> char ' '
- tz ← zone
- return (tod, tz)
-
-hms ∷ Parser TimeOfDay
-hms = do hour ← read2
- _ ← optional (char ':')
- minute ← read2
- second ← option 0 $
- do _ ← optional (char ':')
- read2
- assertTimeOfDayIsGood hour minute second
-
-zone ∷ Parser TimeZone
-zone = choice [ string "GMT" *> return (TimeZone 0 False "GMT")
- , char 'N'
- *> choice [ string "ST" *> return (TimeZone ((-3) * 60 - 30) False "NST")
- , return (TimeZone (1 * 60) False "N")
- ]
- , char 'A'
- *> choice [ string "ST" *> return (TimeZone ((-4) * 60) False "AST")
- , string "DT" *> return (TimeZone ((-3) * 60) False "AST")
- , return (TimeZone ((-1) * 60) False "A")
- ]
- , 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 'Y'
- *> choice [ string "ST" *> return (TimeZone ((-9) * 60) False "YST")
- , string "DT" *> return (TimeZone ((-8) * 60) True "YDT")
- , return (TimeZone ( 12 * 60) False "Y")
- ]
- , char 'H'
- *> choice [ string "ST" *> return (TimeZone ((-10) * 60) False "HST")
- , string "DT" *> return (TimeZone (( -9) * 60) True "HDT")
- ]
- , char 'B'
- *> choice [ string "ST" *> return (TimeZone ((-11) * 60) False "BST")
- , string "DT" *> return (TimeZone ((-10) * 60) True "BDT")
- ]
- , 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 " "
- ⊕ showRFC822TimeZone timeZone