X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=src%2FMain.hs;h=9ca0df693b0a3700721fb315b7806baace0ac9bf;hb=9cf45320c04c72472be8148819753e41d6535f65;hp=2ca3a83816843db631ed6a5eef56366384b4c242;hpb=dd4d3adf452823702f3376d1869b07e39f03bff2;p=dead%2Fhtsn-import.git diff --git a/src/Main.hs b/src/Main.hs index 2ca3a83..9ca0df6 100644 --- a/src/Main.hs +++ b/src/Main.hs @@ -1,60 +1,202 @@ -{-# LANGUAGE ScopedTypeVariables #-} -{-# LANGUAGE OverloadedStrings #-} - +{-# LANGUAGE NoMonomorphismRestriction #-} 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 ( MonadIO, liftIO ) +import Database.Groundhog ( + defaultMigrationLogger, + insert, + migrate, + runMigration ) +import Database.Groundhog.Core ( PersistBackend, 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 ( - SysConfigList, + ArrowXml, + IOStateArrow, XmlPickler, - no, + XmlTree, + (>>>), + (/>), + getAttrl, + getText, + hasName, + readDocument, runX, - withPreserveComment, - withRemoveWS, - withValidate, - xpickle, - xunpickleDocument, - yes ) - -import qualified TSN.Injuries as Injuries ( Message ) -import qualified TSN.InjuriesDetail as InjuriesDetail ( Message ) - -parse_opts :: SysConfigList -parse_opts = - [ withPreserveComment no, - withRemoveWS yes, - 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 () + unpickleDoc, + xpickle ) + +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 ) ) +import qualified TSN.InjuriesDetail as InjuriesDetail ( + Listing ( player_listings ), + Message ( listings ), + PlayerListing ) +import qualified TSN.News as News ( Message ) +import Xml ( parse_opts ) + + +-- | 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, MonadIO m, PersistEntity b, PersistBackend m) + => b -- ^ Dummy Listing instance needed for 'migrate' + -> (a -> [b]) -- ^ listings getter + -> XmlTree + -> m (Maybe Int) -- ^ Return the number of records inserted. +import_generic dummy g xml = do + -- Needs NoMonomorphismRestriction to be allowed to return + -- different types in the two cases above. + 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.News from an 'XmlTree'. +import_news :: (MonadIO m, PersistBackend m) + => XmlTree + -> m (Maybe Int) +import_news = -- This implementation is wrroooonnnnngggg. + import_generic + (undefined :: News.Message) + (\m -> [m] :: [News.Message]) -- Turn a Message into a [Message] + +-- | Import TSN.Injuries from an 'XmlTree'. +import_injuries :: (MonadIO m, PersistBackend m) + => XmlTree + -> m (Maybe Int) +import_injuries = + import_generic + (undefined :: Injuries.Listing) + Injuries.listings + +-- | Import TSN.InjuriesDetail from an 'XmlTree'. +import_injuries_detail :: (MonadIO m, PersistBackend m) + => XmlTree + -> m (Maybe Int) +import_injuries_detail = + import_generic + (undefined :: InjuriesDetail.PlayerListing) + ( (concatMap InjuriesDetail.player_listings) . InjuriesDetail.listings) + +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 + -- 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) = + if backend cfg == Postgres + then withPostgresqlConn cs $ runDbConn $ importer xml + else withSqliteConn cs $ runDbConn $ importer xml + where + -- | Pull the real connection String out of the configuration. + cs :: String + cs = get_connection_string $ connection_string cfg + + importer + | dtd == "injuriesxml.dtd" = import_injuries + | dtd == "Injuries_Detail_XML.dtd" = import_injuries_detail + | dtd == "newsxml.dtd" = import_news + | otherwise = \_ -> do -- Dummy arg simplifies the other cases. + let errmsg = "Unrecognized DTD in " ++ path ++ ": " ++ dtd ++ "." + liftIO $ report_info errmsg + 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) - 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 cfg) (OC.xml_files opt_config)