src/TSN/Picklers.hs

   1 -- | (Un)picklers for data types present in The Sports Network XML
   2 --   feed.
   3 --
   4 module TSN.Picklers (
   5   xp_date,
   6   xp_time )
   7 where
   8
   9 -- System imports.
  10 import Data.Time.Clock ( UTCTime )
  11 import Data.Time.Format ( formatTime, parseTime )
  12 import System.Locale ( defaultTimeLocale )
  13 import Text.XML.HXT.Arrow.Pickle (
  14   xpText,
  15   xpWrapMaybe )
  16 import Text.XML.HXT.Arrow.Pickle.Xml ( PU )
  17
  18
  19 -- | (Un)pickle a UTCTime without the time portion.
  20 --
  21 xp_date :: PU UTCTime
  22 xp_date =
  23   (to_date, from_date) `xpWrapMaybe` xpText
  24   where
  25     format = "%-m/%-d/%Y"
  26
  27     to_date :: String -> Maybe UTCTime
  28     to_date = parseTime defaultTimeLocale format
  29
  30     from_date :: UTCTime -> String
  31     from_date = formatTime defaultTimeLocale format
  32
  33
  34 -- | (Un)pickle a UTCTime without the date portion.
  35 --
  36 xp_time :: PU UTCTime
  37 xp_time =
  38   (to_time, from_time) `xpWrapMaybe` xpText
  39   where
  40     format = "%I:%M %p"
  41
  42     to_time :: String -> Maybe UTCTime
  43     to_time = parseTime defaultTimeLocale format
  44
  45     from_time :: UTCTime -> String
  46     from_time = formatTime defaultTimeLocale format
  47