+{-# LANGUAGE NoMonomorphismRestriction #-}
module Main
where
import Control.Arrow ( (&&&), arr, returnA )
-import Database.Groundhog.Core ( PersistEntity )
-import Database.Groundhog.Sqlite (
+import Control.Monad ( when )
+import Control.Monad.IO.Class ( liftIO )
+import Database.Groundhog (
defaultMigrationLogger,
insert,
migrate,
- runDbConn,
- runMigration,
+ runMigration )
+import Database.Groundhog.Core ( PersistEntity )
+import Database.Groundhog.Generic ( runDbConn )
+import Database.Groundhog.Sqlite (
withSqliteConn )
+import Database.Groundhog.Postgresql (
+ withPostgresqlConn )
+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,
withValidate,
xpickle,
yes )
-import System.Environment ( getArgs )
+
+import Backend ( Backend(..) )
+import CommandLine ( get_args )
+import Configuration ( Configuration(..), merge_optional )
+import ConnectionString ( ConnectionString(..) )
+import ExitCodes ( exit_no_xml_files )
+import Network.Services.TSN.Logging ( init_logging )
+import qualified OptionalConfiguration as OC (
+ OptionalConfiguration ( xml_files ),
+ from_rc )
+import Network.Services.TSN.Report (
+ report_info,
+ report_error )
import qualified TSN.Injuries as Injuries (
Listing,
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
withValidate no ]
--- | We put the 'XmlTree' argument last so that it's easy to eta
--- reduce all of the import_foo functions that call this.
+-- | We put the 'Configuration' and 'XmlTree' arguments 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
+ -> Configuration
-> XmlTree
- -> IO ()
-import_generic dummy g xml =
- withSqliteConn "foo.sqlite3" $ runDbConn $ do
- runMigration defaultMigrationLogger $ do
- migrate dummy
- let msg = unpickleDoc xpickle xml
- case msg of
- Nothing -> error "Should unpickle!"
- Just m -> mapM_ (\l -> insert l) (g m)
+ -> IO (Maybe Int) -- ^ Return the number of records inserted.
+import_generic dummy g cfg xml
+ | backend cfg == Postgres = withPostgresqlConn cs go
+ | otherwise = withSqliteConn cs go
+ where
+ -- | Pull the real connection String out of the configuration.
+ cs :: String
+ cs = get_connection_string $ connection_string cfg
+
+ -- Needs NoMonomorphismRestriction to be allowed to return
+ -- different types in the two cases above.
+ go = runDbConn $ do
+ runMigration defaultMigrationLogger $ 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 insert (g elt)
+ return $ Just (length ids)
+
+
-- | Import TSN.Injuries from an 'XmlTree'.
-import_injuries :: XmlTree -> IO ()
+import_injuries :: Configuration -> XmlTree -> IO (Maybe Int)
import_injuries =
import_generic
(undefined :: Injuries.Listing)
Injuries.listings
-- | Import TSN.InjuriesDetail from an 'XmlTree'.
-import_injuries_detail :: XmlTree -> IO ()
+import_injuries_detail :: Configuration -> 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 <- runX $ readA >>> (doctypeA &&& returnA) >>> (arr import_with_dtd)
+import_file :: Configuration -> FilePath -> IO ()
+import_file cfg 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
- [] -> error "ERROR: Unable to determine DOCTYPE."
- (r:_) -> r -- Need to do something with the result or it gets GCed?
- -- We do only expect one result fortunately.
+ -- 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
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 ()
+ 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 = error "ERROR: Unrecognized DTD."
-
+ | dtd == "injuriesxml.dtd" = import_injuries cfg xml
+ | dtd == "Injuries_Detail_XML.dtd" = import_injuries_detail cfg xml
+ | otherwise = do
+ report_info $ "Unrecognized DTD in " ++ path ++ ": " ++ dtd ++ "."
+ return Nothing
main :: IO ()
main = do
- args <- getArgs
- import_file (args !! 0)
+ 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)
+
+ -- We don't do this in parallel (for now?) to keep the error
+ -- messages nice and linear.
+ mapM_ (import_file cfg) (OC.xml_files opt_config)
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