+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE RecordWildCards #-}
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE TypeFamilies #-}
+
-- | GameInfo represents a collection of DTDs that we don't really
-- handle but want to make available. The raw XML gets stored in the
-- database along with the XML_File_ID, but we don't parse any of it.
-- See also: TSN.XML.SportInfo
--
module TSN.XML.GameInfo (
- dtds )
+ dtds,
+ parse_xml,
+ -- * WARNING: these are private but exported to silence warnings
+ GameInfoConstructor(..) )
where
+-- System imports.
+import Data.Time.Clock ( UTCTime )
+import Database.Groundhog ( migrate )
+import Database.Groundhog.TH (
+ groundhog,
+ mkPersist )
+import Text.XML.HXT.Core ( XmlTree )
+import Text.XML.HXT.DOM.ShowXml ( xshow )
+
+-- Local imports.
+import TSN.Codegen ( tsn_codegen_config )
+import TSN.DbImport ( DbImport(..), ImportResult(..), run_dbmigrate )
+import TSN.Parse (
+ parse_message,
+ parse_xmlfid,
+ parse_xml_time_stamp )
+import TSN.XmlImport ( XmlImport(..) )
+import Xml (
+ FromXml(..),
+ ToDb(..) )
+
-- | The DTDs for everything that we consider "Game Info."
--
-- TODO: This is the list from the old implementation. We need to
--
dtds :: [String]
dtds =
- [ "CBASK_Lineup_XML.dtd",
- "cbaskpreviewxml.dtd",
- "cflpreviewxml.dtd",
- "Matchup_NBA_NHL_XML.dtd",
+ [ "CBASK_Lineup_XML.dtd", -- missing DTD
+ "cbaskpreviewxml.dtd", -- missing DTD
+ "cflpreviewxml.dtd", -- missing DTD
+ "Matchup_NBA_NHL_XML.dtd", -- missing DTD
"mlbpreviewxml.dtd",
"MLB_Gaming_Matchup_XML.dtd",
- "MLB.dtd",
+ "MLB.dtd", -- missing DTD
"MLB_Lineup_XML.dtd",
"MLB_Matchup_XML.dtd",
"MLS_Preview_XML.dtd",
"NBA_Gaming_Matchup_XML.dtd",
- "NBA.dtd",
+ "NBA.dtd", -- missing DTD
"NBA_Playoff_Matchup_XML.dtd",
"NBALineupXML.dtd",
"nbapreviewxml.dtd",
- "NCAA_FB_Preview_XML.dtd",
- "nflpreviewxml.dtd",
- "NFL_NCAA_FB_Matchup_XML.dtd",
+ "NCAA_FB_Preview_XML.dtd", -- missing DTD
+ "nflpreviewxml.dtd", -- missing DTD
+ "NFL_NCAA_FB_Matchup_XML.dtd", -- missing DTD
"nhlpreviewxml.dtd",
"recapxml.dtd",
- "WorldBaseballPreviewXML.dtd" ]
+ "WorldBaseballPreviewXML.dtd" -- missing DTD
+ ]
+
+
+-- | XML representation of a GameInfo \<message\>.
+--
+data Message =
+ Message {
+ xml_dtd :: String,
+ xml_xml_file_id :: Int,
+ xml_time_stamp :: UTCTime,
+ xml_xml :: String }
+ deriving (Eq, Show)
+
+
+-- | Attempt to parse a 'Message' from an 'XmlTree'. If we cannot,
+-- we fail with an error message.
+--
+parse_xml :: String -> XmlTree -> Either String Message
+parse_xml dtdname xmltree = do
+ xmlfid <- parse_xmlfid xmltree
+ timestamp <- parse_xml_time_stamp xmltree
+ message <- parse_message xmltree
+ return $ Message dtdname (fromInteger xmlfid) timestamp (xshow [message])
+
+
+-- | Database representation of a 'Message'.
+--
+data GameInfo =
+ GameInfo {
+ db_dtd :: String,
+ db_xml_file_id :: Int,
+ db_time_stamp :: UTCTime,
+ db_xml :: String }
+
+
+instance ToDb Message where
+ -- | The database analogue of a 'Message' is an 'GameInfo'.
+ type Db Message = GameInfo
+
+instance FromXml Message where
+ -- | The XML to DB conversion is trivial here.
+ --
+ from_xml Message{..} = GameInfo {
+ db_dtd = xml_dtd,
+ db_xml_file_id = xml_xml_file_id,
+ db_time_stamp = xml_time_stamp,
+ db_xml = xml_xml }
+
+
+-- | This allows us to insert the XML representation 'Message'
+-- directly.
+--
+instance XmlImport Message
+
+
+--
+-- Database code
+--
+
+instance DbImport Message where
+ dbmigrate _ =
+ run_dbmigrate $ migrate (undefined :: GameInfo)
+
+ -- | We import a 'Message' by inserting the whole thing at
+ -- once. Nothing fancy going on here.
+ dbimport msg = do
+ insert_xml_ msg
+ return ImportSucceeded
+
+mkPersist tsn_codegen_config [groundhog|
+- entity: GameInfo
+ constructors:
+ - name: GameInfo
+ uniques:
+ - name: unique_game_info
+ type: constraint
+ # Prevent multiple imports of the same message.
+ fields: [db_xml_file_id]
+|]