Nomyx-0.2.1: src/Main.hs
-----------------------------------------------------------------------------
--
-- Module : Main
-- Copyright :
-- License : AllRightsReserved
--
-- Maintainer :
-- Stability :
-- Portability :
--
-- |
--
-----------------------------------------------------------------------------
{-# LANGUAGE GADTs, DoAndIfThenElse #-}
module Main (main) where
import Prelude hiding (catch, (.))
import System.Console.GetOpt
import System.Environment
import Web.MainPage
import Control.Concurrent
import Interpret
import Control.Concurrent.STM
import qualified System.Posix.Signals as S
import Control.Monad.CatchIO hiding (catch)
import Control.Monad.Trans
import Language.Nomyx.Test as LT
import Data.Maybe
import Safe
import Network.BSD
import System.Posix.Daemonize
import Types
import Serialize
import Paths_Nomyx as PN
import System.Directory
import Data.Time.Clock
import Language.Nomyx hiding (getCurrentTime)
import Control.Exception hiding (bracket)
import Test
import Utils
import Data.Version (showVersion)
import Control.Category
import Multi
import Language.Haskell.Interpreter.Server hiding (start)
import Data.Acid (openLocalStateFrom)
import System.FilePath ((</>))
import Happstack.Auth.Core.Auth (initialAuthState)
import Data.Acid.Local (createCheckpointAndClose)
import Happstack.Auth.Core.Profile (initialProfileState)
import System.Unix.Directory
defaultLogFile :: FilePath
defaultLogFile = "Nomyx.save"
-- | Entry point of the program.
main :: IO Bool
main = do
args <- getArgs
(flags, _) <- nomyxOpts args
if (Version `elem` flags) then do
putStrLn $ "Nomyx " ++ showVersion version
return True
else do
putStrLn "Welcome to Nomyx!"
case (Daemon `elem` flags) of
True -> (daemonize $ start flags) >> return True
False -> start flags >> return True
start :: [Flag] -> IO ()
start flags = do
serverCommandUsage
--start the haskell interpreter
sh <- protectHandlers startInterpreter
if Test `elem` flags then do
putStrLn $ "\nNomyx Language Tests results:\n" ++ (concatMap (\(a,b) -> a ++ ": " ++ (show b) ++ "\n") LT.tests)
ts <- playTests sh
putStrLn $ "\nNomyx Game Tests results:\n" ++ (concatMap (\(a,b) -> a ++ ": " ++ (show b) ++ "\n") ts)
putStrLn $ "All Tests Pass: " ++ (show $ allTests && (all snd ts))
else do
--creating game structures
logFile <- case (findSaveFile flags) of
Just f -> return f
Nothing -> return defaultLogFile
port <- case (findPort flags) of
Just p -> return $ read p
Nothing -> return $ 8000
host <- case (findHost flags) of
Just h -> return h
Nothing -> getHostName >>= return
logFilePath <- getDataFileName logFile
let settings sendMail = Settings logFilePath (Network host port) sendMail
dataDir <- getDataDir
let profilesDir = dataDir </> "profiles"
when (NoReadSaveFile `elem` flags) $ do
removeRecursiveSafely profilesDir
removeFile (_logFilePath $ settings True)
multi <- case (findLoadTest flags) of
Just testName -> loadTestName (settings False) testName sh
Nothing -> Main.loadMulti (settings True) sh
--main loop
withAcid (Just profilesDir) $ \acid -> do
tvSession <- atomically $ newTVar (Session sh multi acid)
--start the web server
forkIO $ launchWebServer tvSession (Network host port)
forkIO $ launchTimeEvents tvSession
serverLoop tvSession logFile
loadMulti :: Settings -> ServerHandle -> IO Multi
loadMulti set sh = do
fileExists <- doesFileExist $ _logFilePath $ set
multi <- case fileExists of
True -> do
putStrLn "Loading previous game"
Serialize.loadMulti set sh `catch`
(\e -> (putStrLn $ "Error while loading logged events, log file discarded\n" ++ (show (e::ErrorCall))) >> (return $ defaultMulti set))
False -> return $ defaultMulti set
return multi
-- | a loop that will handle server commands
serverLoop :: TVar Session -> FilePath -> IO ()
serverLoop ts f = do
s <- getLine
case s of
"d" -> do
(Session _ m _) <- atomically $ readTVar ts
putStrLn $ displayMulti m
serverLoop ts f
"s" -> do
putStrLn "saving state..."
(Session _ m _) <- atomically $ readTVar ts
fp <- getDataFileName f
save fp m
serverLoop ts f
"q" -> return ()
_ -> do
putStrLn "command not recognized"
serverLoop ts f
serverCommandUsage :: IO ()
serverCommandUsage = do
putStrLn "Server commands:"
putStrLn "s -> save state"
putStrLn "d -> debug"
putStrLn "q -> quit"
-- | Launch mode
data Flag
= Verbose | Version | Test | HostName String | Port String | LogFile FilePath | Daemon | LoadTest String | NoReadSaveFile
deriving (Show, Eq)
-- | launch options description
options :: [OptDescr Flag]
options =
[ Option ['v'] ["verbose"] (NoArg Verbose) "chatty output on stderr"
, Option ['V','?'] ["version"] (NoArg Version) "show version number"
, Option ['t'] ["tests"] (NoArg Test) "perform routine check"
, Option ['h'] ["host"] (ReqArg HostName "Hostname") "specify host name"
, Option ['p'] ["port"] (ReqArg Port "Port") "specify port"
, Option ['r'] ["read"] (ReqArg LogFile "SaveFile") "specify save file (default is Nomyx.save)"
, Option ['n'] ["noread"] (NoArg NoReadSaveFile) "don't read save file, just overwrite"
, Option ['d'] ["daemon"] (NoArg Daemon) "run in daemon mode"
, Option ['l'] ["loadtest"] (ReqArg LoadTest "TestName") "specify name of test to load"
]
nomyxOpts :: [String] -> IO ([Flag], [String])
nomyxOpts argv =
case getOpt Permute options argv of
(o,n,[] ) -> return (o,n)
(_,_,errs) -> ioError (userError (concat errs ++ usageInfo header options))
where header = "Usage: Nomyx [OPTION...]"
findPort :: [Flag] -> Maybe String
findPort fs = headMay $ catMaybes $ map isPort fs where
isPort (Port a) = Just a
isPort _ = Nothing
findHost :: [Flag] -> Maybe String
findHost fs = headMay $ catMaybes $ map isHost fs where
isHost (HostName a) = Just a
isHost _ = Nothing
findLoadTest :: [Flag] -> Maybe String
findLoadTest fs = headMay $ catMaybes $ map isLoadTest fs where
isLoadTest (LoadTest a) = Just a
isLoadTest _ = Nothing
findSaveFile :: [Flag] -> Maybe FilePath
findSaveFile fs = headMay $ catMaybes $ map isSaveFile fs where
isSaveFile (LogFile a) = Just a
isSaveFile _ = Nothing
helper :: MonadCatchIO m => S.Handler -> S.Signal -> m S.Handler
helper handler signal = liftIO $ S.installHandler signal handler Nothing
signals :: [S.Signal]
signals = [ S.sigQUIT
, S.sigINT
, S.sigHUP
, S.sigTERM
]
saveHandlers :: MonadCatchIO m => m [S.Handler]
saveHandlers = liftIO $ mapM (helper S.Ignore) signals
restoreHandlers :: MonadCatchIO m => [S.Handler] -> m [S.Handler]
restoreHandlers h = liftIO . sequence $ zipWith helper h signals
protectHandlers :: MonadCatchIO m => m a -> m a
protectHandlers a = bracket saveHandlers restoreHandlers $ const a
triggerTimeEvent :: TVar Session -> UTCTime -> IO()
triggerTimeEvent tm t = do
(Session sh m a) <- atomically $ readTVar tm
m' <- execWithMulti t (Multi.triggerTimeEvent t) m
atomically $ writeTVar tm (Session sh m' a)
save (_mSettings >>>_logFilePath $ m') m'
launchTimeEvents :: TVar Session -> IO()
launchTimeEvents tm = do
now <- getCurrentTime
--putStrLn $ "tick " ++ (show now)
(Session _ m _) <- atomically $ readTVar tm
timeEvents <- getTimeEvents now m
when (length timeEvents /= 0) $ putStrLn "found time event(s)"
mapM_ (Main.triggerTimeEvent tm) timeEvents
--sleep 1 second roughly
threadDelay 1000000
launchTimeEvents tm
withAcid :: Maybe FilePath -- ^ state directory
-> (Profiles -> IO a) -- ^ action
-> IO a
withAcid mBasePath f =
let basePath = fromMaybe "_state" mBasePath in
bracket (openLocalStateFrom (basePath </> "auth") initialAuthState) (createCheckpointAndClose) $ \auth ->
bracket (openLocalStateFrom (basePath </> "profile") initialProfileState) (createCheckpointAndClose) $ \profile ->
bracket (openLocalStateFrom (basePath </> "profileData") initialProfileDataState) (createCheckpointAndClose) $ \profileData ->
f (Profiles auth profile profileData)