+ from_date = formatTime defaultTimeLocale date_format_padded
+
+
+
+-- | Format a number as a string using a comma as the thousands
+-- separator.
+--
+-- Examples:
+--
+-- >>> format_commas 0
+-- "0"
+-- >>> format_commas 10
+-- "10"
+-- >>> format_commas 100
+-- "100"
+-- >>> format_commas 1000
+-- "1,000"
+-- >>> format_commas 10000
+-- "10,000"
+-- >>> format_commas 100000
+-- "100,000"
+-- >>> format_commas 1000000
+-- "1,000,000"
+--
+format_commas :: Int -> String
+format_commas x =
+ reverse (intercalate "," $ chunksOf 3 $ reverse $ show x)
+
+-- | Parse \<Earnings\> from an 'AutoRaceResultsListing'. These are
+-- essentially 'Int's, but they look like,
+--
+-- * \<Earnings\>336,826\</Earnings\>
+--
+-- * \<Earnings\>1,000,191\</Earnings\>
+--
+-- * \<Earnings\>TBA\</Earnings\>
+--
+xp_earnings :: PU (Maybe Int)
+xp_earnings =
+ (to_earnings, from_earnings) `xpWrap` xpText
+ where
+ strip_commas :: String -> String
+ strip_commas = replace "," ""
+
+ to_earnings :: String -> Maybe Int
+ to_earnings s
+ | s == "TBA" = Nothing
+ | otherwise = Just $ (read . strip_commas) s
+
+ from_earnings :: Maybe Int -> String
+ from_earnings Nothing = "TBA"
+ from_earnings (Just i) = format_commas i
+
+
+-- | (Un)pickle an unpadded 'UTCTime'. Used for example on the
+-- \<RaceDate\> elements in an 'AutoRaceResults' message.
+--
+-- Examples:
+--
+-- * \<RaceDate\>6/1/2014 1:00:00 PM\</RaceDate\>
+--
+-- * \<RaceDate\>5/24/2014 2:45:00 PM\</RaceDate\>
+--
+xp_datetime :: PU UTCTime
+xp_datetime =
+ (to_datetime, from_datetime) `xpWrapMaybe` xpText
+ where
+ format = date_format ++ " " ++ "%-I:%M:%S %p"
+
+ to_datetime :: String -> Maybe UTCTime
+ to_datetime = parseTime defaultTimeLocale format
+
+ from_datetime :: UTCTime -> String
+ from_datetime = formatTime defaultTimeLocale format