-{-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE OverloadedStrings #-}
-
module Main
where
---import Control.Monad.IO.Class ( liftIO )
-import Data.Maybe ( listToMaybe )
---import Database.Groundhog.TH
---import Database.Groundhog.Sqlite
-import Text.Show.Pretty ( ppShow )
+import Control.Arrow ( (&&&), arr, returnA )
+import Control.Monad ( when )
+import Control.Monad.IO.Class ( liftIO )
+import Database.Groundhog.Core ( PersistEntity )
+import Database.Groundhog.Sqlite (
+ defaultMigrationLogger,
+ insert,
+ migrate,
+ runDbConn,
+ runMigration,
+ withSqliteConn )
+import Data.Maybe ( isNothing )
+import Data.Monoid ( (<>) )
+import System.Console.CmdArgs ( def )
+import System.Exit ( exitWith, ExitCode (ExitFailure) )
+import System.IO.Error ( catchIOError )
import Text.XML.HXT.Core (
+ ArrowXml,
+ IOStateArrow,
SysConfigList,
XmlPickler,
+ XmlTree,
+ (>>>),
+ (/>),
+ getAttrl,
+ getText,
+ hasName,
no,
+ readDocument,
runX,
+ unpickleDoc,
withPreserveComment,
withRemoveWS,
+ withSubstDTDEntities,
withValidate,
xpickle,
- xunpickleDocument,
yes )
-import qualified TSN.Injuries as Injuries ( Message )
-import qualified TSN.InjuriesDetail as InjuriesDetail ( Message )
+import CommandLine ( get_args )
+import Configuration ( Configuration(..), merge_optional )
+import ExitCodes (
+ exit_no_connection_string,
+ exit_no_xml_files )
+import Network.Services.TSN.Logging ( init_logging )
+import qualified OptionalConfiguration as OC (
+ OptionalConfiguration ( connection_string, xml_files ),
+ from_rc )
+import Network.Services.TSN.Report (
+ report_info,
+ report_error )
+import qualified TSN.Injuries as Injuries (
+ Listing,
+ Message ( listings ) )
+import qualified TSN.InjuriesDetail as InjuriesDetail (
+ Listing ( player_listings ),
+ Message ( listings ),
+ PlayerListing )
+
+
+-- | A list of options passed to 'readDocument' when we parse an XML
+-- document. We don't validate because the DTDs from TSN are
+-- wrong. As a result, we don't want to keep useless DTDs
+-- areound. Thus we disable 'withSubstDTDEntities' which, when
+-- combined with "withValidate no", prevents HXT from trying to read
+-- the DTD at all.
+--
parse_opts :: SysConfigList
parse_opts =
[ withPreserveComment no,
withRemoveWS yes,
+ withSubstDTDEntities no,
withValidate no ]
-parse_file :: XmlPickler a => FilePath -> IO (Maybe a)
-parse_file path =
- fmap listToMaybe $
- runX ( xunpickleDocument xpickle parse_opts path )
-
--- main_sql :: IO ()
--- main_sql =
--- withSqliteConn "foo.sqlite3" $ runDbConn $ do
--- runMigration defaultMigrationLogger $ do
--- migrate (undefined :: Injuries.Message)
--- migrate (undefined :: Injuries.Listing)
-
--- msg :: Maybe Injuries.Message <- liftIO $ parse_file
--- "test/xml/injuriesxml.xml"
--- case msg of
--- Nothing -> return ()
--- Just m -> do
--- msg_id <- insert m
--- return ()
+
+-- | We put the 'XmlTree' argument last so that it's easy to eta
+-- reduce all of the import_foo functions that call this.
+--
+import_generic :: (XmlPickler a, PersistEntity b)
+ => b -- ^ Dummy Listing instance needed for 'migrate'
+ -> (a -> [b]) -- ^ listings getter
+ -> XmlTree
+ -> IO (Maybe Int) -- ^ Return the number of records inserted.
+import_generic dummy g xml =
+ withSqliteConn "foo.sqlite3" $ runDbConn $ do
+ runMigration defaultMigrationLogger $ do
+ migrate dummy
+ let root_element = unpickleDoc xpickle xml
+ case root_element of
+ Nothing -> do
+ let msg = "Could not unpickle document in import_generic."
+ liftIO $ report_error msg
+ return Nothing
+ Just elt -> do
+ ids <- mapM (\l -> insert l) (g elt)
+ return $ Just (length ids)
+
+-- | Import TSN.Injuries from an 'XmlTree'.
+import_injuries :: XmlTree -> IO (Maybe Int)
+import_injuries =
+ import_generic
+ (undefined :: Injuries.Listing)
+ Injuries.listings
+
+-- | Import TSN.InjuriesDetail from an 'XmlTree'.
+import_injuries_detail :: XmlTree -> IO (Maybe Int)
+import_injuries_detail =
+ import_generic
+ (undefined :: InjuriesDetail.PlayerListing)
+ ( (concatMap InjuriesDetail.player_listings) . InjuriesDetail.listings)
+
+import_file :: FilePath -> IO ()
+import_file path = do
+ results <- catchIOError
+ parse_and_import
+ (\e -> do
+ report_error (show e)
+ report_error $ "Failed to import file " ++ path ++ "."
+ -- Return a nonempty list so we don't claim incorrectly that
+ -- we couldn't parse the DTD.
+ return [ Nothing ] )
+
+ case results of
+ -- If results' is empty, one of the arrows return "nothing."
+ [] -> report_error $ "Unable to determine DTD for file " ++ path ++ "."
+ (r:_) ->
+ case r of
+ Nothing -> return ()
+ Just cnt -> report_info $ "Successfully imported " ++
+ (show cnt) ++
+ " records from " ++ path ++ "."
+ where
+ -- | An arrow that reads a document into an 'XmlTree'.
+ readA :: IOStateArrow s a XmlTree
+ readA = readDocument parse_opts path
+
+ -- | An arrow which parses the doctype "SYSTEM" of an 'XmlTree'.
+ -- We use these to determine the parser to use.
+ doctypeA :: ArrowXml a => a XmlTree String
+ doctypeA = getAttrl >>> hasName "doctype-SYSTEM" /> getText
+
+ -- | Combine the arrows above as well as the function below
+ -- (arrowized with 'arr') into an IO action that does everything
+ -- (parses and then runs the import on what was parsed).
+ --
+ -- The result of runX has type IO [IO (Maybe Int)]. We thus use
+ -- bind (>>=) and sequence to combine all of the IOs into one
+ -- big one outside of the list.
+ parse_and_import :: IO [Maybe Int]
+ parse_and_import =
+ (runX $ readA >>> (doctypeA &&& returnA) >>> (arr import_with_dtd))
+ >>=
+ sequence
+
+ -- | Takes a 'Doctype', 'XmlTree' pair and uses the 'Doctype' to
+ -- determine which function to call on the 'XmlTree'.
+ import_with_dtd :: (String, XmlTree) -> IO (Maybe Int)
+ import_with_dtd (dtd,xml)
+ | dtd == "injuriesxml.dtd" = import_injuries xml
+ | dtd == "Injuries_Detail_XML.dtd" = import_injuries_detail xml
+ | otherwise = do
+ report_info $ "Unrecognized DTD in " ++ path ++ ": " ++ dtd ++ "."
+ return Nothing
main :: IO ()
main = do
- msg1 :: Maybe Injuries.Message <- parse_file "test/xml/injuriesxml.xml"
- putStr $ ppShow msg1
+ rc_cfg <- OC.from_rc
+ cmd_cfg <- get_args
+
+ -- Merge the config file options with the command-line ones,
+ -- prefering the command-line ones.
+ let opt_config = rc_cfg <> cmd_cfg
+
+ -- Update a default config with any options that have been set in
+ -- either the config file or on the command-line. We initialize
+ -- logging before the missing parameter checks below so that we can
+ -- log the errors.
+ let cfg = (def :: Configuration) `merge_optional` opt_config
+ init_logging (log_file cfg) (log_level cfg) (syslog cfg)
+
+ -- Check the optional config for missing required options.
+ when (null $ OC.xml_files opt_config) $ do
+ report_error "No XML files given."
+ exitWith (ExitFailure exit_no_xml_files)
+
+ -- There's a default connection string, namely the empty string, but
+ -- it's not much use to us. So we make sure that we were given
+ -- something explicitly.
+ when (isNothing (OC.connection_string opt_config)) $ do
+ report_error "No connection string supplied."
+ exitWith (ExitFailure exit_no_connection_string)
- msg2 :: Maybe InjuriesDetail.Message <- parse_file
- "test/xml/Injuries_Detail_XML.xml"
- putStr $ ppShow msg2
+ -- We don't do this in parallel (for now?) to keep the error
+ -- messages nice and linear.
+ mapM_ import_file (OC.xml_files opt_config)
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