module Rakka.Utils
- ( parseYesOrNo
+ ( yesOrNo
+ , parseYesOrNo
, maybeA
- , defaultTo
, deleteIfEmpty
, formatW3CDateTime
+ , chomp
)
where
import Control.Arrow
import Control.Arrow.ArrowList
-import System.Time
+import Data.Time
import Text.Printf
+yesOrNo :: Bool -> String
+yesOrNo True = "yes"
+yesOrNo False = "no"
+
+
parseYesOrNo :: ArrowChoice a => a String Bool
parseYesOrNo
= proc str -> do case str of
(x:_) -> returnA -< Just x
-defaultTo :: ArrowChoice a => b -> a (Maybe b) b
-defaultTo def
- = proc m -> case m of
- Nothing -> returnA -< def
- Just x -> returnA -< x
-
-
deleteIfEmpty :: (ArrowList a, ArrowChoice a) => a String String
deleteIfEmpty
= proc str -> do case str of
_ -> returnA -< str
-formatW3CDateTime :: CalendarTime -> String
-formatW3CDateTime time
- = formatDateTime time ++ formatTimeZone time
+formatW3CDateTime :: ZonedTime -> String
+formatW3CDateTime zonedTime
+ = formatLocalTime (zonedTimeToLocalTime zonedTime)
+ ++
+ formatTimeZone (zonedTimeZone zonedTime)
where
- formatDateTime :: CalendarTime -> String
- formatDateTime time
- = printf "%04d-%02d-%02dT%02d:%02d:%02d"
- (ctYear time)
- (fromEnum (ctMonth time) + 1)
- (ctDay time)
- (ctHour time)
- (ctMin time)
- (ctSec time)
+ formatLocalTime :: LocalTime -> String
+ formatLocalTime localTime
+ = let (year, month, day) = toGregorian (localDay localTime)
+ timeOfDay = localTimeOfDay localTime
+ (secInt, secFrac) = properFraction (todSec timeOfDay)
+ in
+ (printf "%04d-%02d-%02dT%02d:%02d:%02d"
+ year
+ month
+ day
+ (todHour timeOfDay)
+ (todMin timeOfDay)
+ (secInt :: Int))
+ ++
+ (if secFrac == 0
+ then ""
+ else tail (show secFrac))
- formatTimeZone :: CalendarTime -> String
- formatTimeZone time
- = case ctTZ time
- of offset | offset < 0 -> '-':(showTZ $ negate offset)
- | offset == 0 -> "Z"
- | otherwise -> '+':(showTZ offset)
+ formatTimeZone :: TimeZone -> String
+ formatTimeZone tz
+ = case timeZoneMinutes tz of
+ offset | offset < 0 -> '-':(showTZ $ negate offset)
+ | offset == 0 -> "Z"
+ | otherwise -> '+':(showTZ offset)
showTZ :: Int -> String
showTZ offset
- = let hour = offset `div` 3600
- min = (offset - hour * 3600) `div` 60
+ = let hour = offset `div` 60
+ minute = offset - hour * 60
in
- show2 hour ++ ":" ++ show2 min
+ show2 hour ++ ":" ++ show2 minute
show2 :: Int -> String
show2 n | n < 10 = '0':(show n)
- | otherwise = show n
\ No newline at end of file
+ | otherwise = show n
+
+
+chomp :: String -> String
+chomp = reverse . snd . break (/= '\n') . reverse