Add the format_commas function and use it to implement the earnings pickler.

[dead/htsn-import.git] / src / TSN / Picklers.hs

diff --git a/src/TSN/Picklers.hs b/src/TSN/Picklers.hs
index 387f4cf4fe4926d0c436678ca0e2ed509b075049..ff7b0d1e677e9cff2c9cd469c77e226be272a2a6 100644 (file)
--- a/src/TSN/Picklers.hs
+++ b/src/TSN/Picklers.hs
@@ -13,6 +13,8 @@ module TSN.Picklers (
 where
 
 -- System imports.
+import Data.List ( intercalate )
+import Data.List.Split ( chunksOf )
 import Data.String.Utils ( replace )
 import Data.Time.Clock ( NominalDiffTime, UTCTime, addUTCTime )
 import Data.Time.Format ( formatTime, parseTime )
@@ -78,6 +80,31 @@ xp_date_padded =
     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,
 --
@@ -98,8 +125,8 @@ xp_earnings =
       | otherwise = (read . strip_commas . show) s
 
     from_earnings :: Maybe Int -> String
-    from_earnings Nothing = ""
-    from_earnings (Just i) = show i
+    from_earnings Nothing = "TBA"
+    from_earnings (Just i) = format_commas i
 
 
 -- | (Un)pickle a 'UTCTime' from a \<RaceDate\> element in an