Add a pickler for AutoRacingResults <RaceDate> elements.

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

diff --git a/src/TSN/Picklers.hs b/src/TSN/Picklers.hs
index c70b2ba84edc5d627575622d1bb2a609f99bb195..dc3ed9a05cb452fbba1ad884593fc5ace02967c9 100644 (file)
--- a/src/TSN/Picklers.hs
+++ b/src/TSN/Picklers.hs
@@ -3,7 +3,9 @@
 --
 module TSN.Picklers (
   xp_date,
+  xp_date_padded,
   xp_gamedate,
+  xp_racedate,
   xp_tba_time,
   xp_time,
   xp_time_stamp )
@@ -19,6 +21,33 @@ import Text.XML.HXT.Arrow.Pickle (
   xpWrapMaybe )
 import Text.XML.HXT.Arrow.Pickle.Xml ( PU )
 
+-- Local imports.
+import TSN.Parse (
+  parse_time_stamp,
+  time_format,
+  time_stamp_format )
+
+
+-- | The format string for a base date in m/d/yyyy format. The
+--   day/month are not padded at all. This will match for example,
+--
+--   * 2/15/1983
+--   * 1/1/0000
+--
+date_format :: String
+date_format = "%-m/%-d/%Y"
+
+
+-- | The format string for a base date in mm/dd/yyyy format. The
+--   day/month are padded to two characters with zeros. This will
+--   match for example,
+--
+--   * 02/15/1983
+--   * 01/01/0000
+--
+date_format_padded :: String
+date_format_padded = "%0m/%0d/%Y"
+
 
 -- | (Un)pickle a UTCTime without the time portion.
 --
@@ -26,13 +55,46 @@ xp_date :: PU UTCTime
 xp_date =
   (to_date, from_date) `xpWrapMaybe` xpText
   where
-    format = "%-m/%-d/%Y"
+    to_date :: String -> Maybe UTCTime
+    to_date = parseTime defaultTimeLocale date_format
+
+    from_date :: UTCTime -> String
+    from_date = formatTime defaultTimeLocale date_format
 
+
+-- | (Un)pickle a UTCTime without the time portion. The day/month are
+--   padded to two characters with zeros.
+--
+xp_date_padded :: PU UTCTime
+xp_date_padded =
+  (to_date, from_date) `xpWrapMaybe` xpText
+  where
     to_date :: String -> Maybe UTCTime
-    to_date = parseTime defaultTimeLocale format
+    to_date = parseTime defaultTimeLocale date_format_padded
 
     from_date :: UTCTime -> String
-    from_date = formatTime defaultTimeLocale format
+    from_date = formatTime defaultTimeLocale date_format_padded
+
+
+-- | (Un)pickle a 'UTCTime' from a \<RaceDate\> element in an
+--   'AutoRaceResults' message.
+--
+--   Example:
+--
+--   <RaceDate>6/1/2014 1:00:00 PM</RaceDate>
+--   <RaceDate>5/24/2014 2:45:00 PM</RaceDate>
+--
+xp_racedate :: PU UTCTime
+xp_racedate =
+  (to_racedate, from_racedate) `xpWrapMaybe` xpText
+  where
+    format = date_format ++ " " ++ "%-I:%M:%S %p"
+
+    to_racedate :: String -> Maybe UTCTime
+    to_racedate = parseTime defaultTimeLocale format
+
+    from_racedate :: UTCTime -> String
+    from_racedate = formatTime defaultTimeLocale format
 
 
 -- | (Un)pickle a UTCTime from a weather forecast's gamedate. Example
@@ -83,10 +145,7 @@ xp_gamedate =
 
 
 
--- | The time format string used in 'xp_time' and 'xp_time_stamp'.
---
-xp_time_format :: String
-xp_time_format = "%I:%M %p"
+
 
 
 -- | (Un)pickle a UTCTime without the date portion.
@@ -96,10 +155,10 @@ xp_time =
   (to_time, from_time) `xpWrapMaybe` xpText
   where
     to_time :: String -> Maybe UTCTime
-    to_time = parseTime defaultTimeLocale xp_time_format
+    to_time = parseTime defaultTimeLocale time_format
 
     from_time :: UTCTime -> String
-    from_time = formatTime defaultTimeLocale xp_time_format
+    from_time = formatTime defaultTimeLocale time_format
 
 
 -- | (Un)pickle a UTCTime without the date portion, allowing for a
@@ -112,11 +171,12 @@ xp_tba_time =
     to_time :: String -> Maybe UTCTime
     to_time s
       | s == "TBA" = Nothing
-      | otherwise = parseTime defaultTimeLocale xp_time_format s
+      | otherwise = parseTime defaultTimeLocale time_format s
 
     from_time :: Maybe UTCTime -> String
     from_time Nothing = ""
-    from_time (Just t) = formatTime defaultTimeLocale xp_time_format t
+    from_time (Just t) = formatTime defaultTimeLocale time_format t
+
 
 
 -- | (Un)pickle the \<time_stamp\> element format to/from a 'UTCTime'.
@@ -129,22 +189,14 @@ xp_tba_time =
 --
 xp_time_stamp :: PU UTCTime
 xp_time_stamp =
-  (to_time_stamp, from_time_stamp) `xpWrapMaybe` xpText
+  (parse_time_stamp, from_time_stamp) `xpWrapMaybe` xpText
   where
-    -- This omits the timezone and trailing space.
-    format = " %B %-d, %Y, at " ++ xp_time_format ++ " ET "
-
     five_hours :: NominalDiffTime
     five_hours = 5 * 60 * 60
 
-    add_five :: UTCTime -> UTCTime
-    add_five = addUTCTime five_hours
-
     subtract_five :: UTCTime -> UTCTime
     subtract_five = addUTCTime (-1 * five_hours)
 
-    to_time_stamp :: String -> Maybe UTCTime
-    to_time_stamp = fmap add_five . parseTime defaultTimeLocale format
-
     from_time_stamp :: UTCTime -> String
-    from_time_stamp = formatTime defaultTimeLocale format . subtract_five
+    from_time_stamp =
+      formatTime defaultTimeLocale time_stamp_format . subtract_five