import Data.Time.Clock ( UTCTime )
import Data.Time.Format ( formatTime, parseTime )
import System.Locale ( defaultTimeLocale )
-import Text.Printf ( printf )
-import Text.Read ( readMaybe )
import Text.XML.HXT.Arrow.Pickle (
xpText,
xpWrapMaybe )
from_date = formatTime defaultTimeLocale format
--- | Parse a team_id. This /should/ just be an 'Int', but TSN is doing
--- something weird. First of all, player IDs do look like normal
--- 'Int's. But the team IDs are all stuck in the triple digits, and
--- double-digit team IDs appear to be padded to three characters
--- with a leading '0'. So maybe they're treating these as text?
+-- | Parse a team_id. These are (so far!) three characters long, and
+-- not necessarily numeric. For simplicity, we return a 'String'
+-- rather than e.g. a @(Char, Char, Char)@. But unpickling will fail
+-- if the team_id is longer than three characters.
--
--- In any case, we do the simplest thing that is correct for all the
--- XML we've got: pad it to (only) three digits on pickling.
---
-xp_team_id :: PU Int
+xp_team_id :: PU String
xp_team_id =
(to_team_id, from_team_id) `xpWrapMaybe` xpText
where
- to_team_id :: String -> Maybe Int
- to_team_id = readMaybe
+ to_team_id :: String -> Maybe String
+ to_team_id s
+ | length s <= 3 = Just s
+ | otherwise = Nothing
- from_team_id :: Int -> String
- from_team_id = printf "%03d"
+ from_team_id :: String -> String
+ from_team_id = id