Merge pull request #80 from mtlstats/season-select

Select season database on startup

ChangeLog.md

@@ -1,5 +1,8 @@
 # Changelog for mtlstats
 
+## current
+- Ask for database to load on start-up
+
 ## 0.14.0
 - Fixed a bug that was causing shutouts to not be recorded
 - Output report to a text file (report.txt)

src/Mtlstats.hs

@@ -19,23 +19,15 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 -}
 
-{-# LANGUAGE ScopedTypeVariables #-}
-
 module Mtlstats (initState, mainLoop) where
 
-import Control.Exception (IOException, catch)
 import Control.Monad (void)
 import Control.Monad.Extra (whenM)
-import Control.Monad.IO.Class (liftIO)
 import Control.Monad.Trans.Class (lift)
 import Control.Monad.Trans.State (get, gets)
-import Data.Aeson (decodeFileStrict)
+import Data.Maybe (fromJust)
-import Data.Maybe (fromJust, fromMaybe)
-import Lens.Micro ((&), (.~))
-import System.EasyFile (getAppUserDataDirectory, (</>))
 import qualified UI.NCurses as C
 
-import Mtlstats.Config
 import Mtlstats.Control
 import Mtlstats.Types
 
@@ -44,15 +36,7 @@ initState :: C.Curses ProgState
 initState = do
   C.setEcho False
   void $ C.setCursorMode C.CursorInvisible
-  db <- liftIO $ do
+  return newProgState
-    dir <- getAppUserDataDirectory appName
-    let dbFile = dir </> dbFname
-    fromMaybe newDatabase <$> catch
-      (decodeFileStrict dbFile)
-      (\(_ :: IOException) -> return Nothing)
-  return
-    $ newProgState
-    & database .~ db
 
 -- | Main program loop
 mainLoop :: Action ()

src/Mtlstats/Actions.hs

@@ -19,7 +19,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 -}
 
-{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE LambdaCase, ScopedTypeVariables #-}
 
 module Mtlstats.Actions
   ( startNewSeason
@@ -43,12 +43,14 @@ module Mtlstats.Actions
   , backHome
   , scrollUp
   , scrollDown
+  , loadDatabase
   , saveDatabase
   ) where
 
+import Control.Exception (IOException, catch)
 import Control.Monad.IO.Class (liftIO)
 import Control.Monad.Trans.State (gets, modify)
-import Data.Aeson (encodeFile)
+import Data.Aeson (decodeFileStrict, encodeFile)
 import Data.Maybe (fromMaybe)
 import Lens.Micro ((^.), (&), (.~), (%~))
 import System.EasyFile
@@ -216,12 +218,27 @@ scrollUp = scrollOffset %~ max 0 . pred
 scrollDown :: ProgState -> ProgState
 scrollDown = scrollOffset %~ succ
 
+-- | Loads the database
+loadDatabase :: Action ()
+loadDatabase = do
+  dbFile <- dbSetup
+  liftIO
+    (catch
+      (decodeFileStrict dbFile)
+      (\(_ :: IOException) -> return Nothing))
+    >>= mapM_ (modify . (database .~))
+
 -- | Saves the database
-saveDatabase :: String -> Action ()
+saveDatabase :: Action ()
-saveDatabase fn = do
+saveDatabase = do
-  db <- gets (^.database)
+  db     <- gets (^.database)
+  dbFile <- dbSetup
+  liftIO $ encodeFile dbFile db
+
+dbSetup :: Action String
+dbSetup = do
+  fn <- gets (^.dbName)
   liftIO $ do
     dir <- getAppUserDataDirectory appName
-    let dbFile = dir </> fn
     createDirectoryIfMissing True dir
-    encodeFile dbFile db
+    return $ dir </> fn ++ ".json"

src/Mtlstats/Control.hs

@@ -39,7 +39,7 @@ import Mtlstats.Types
 dispatch :: ProgState -> Controller
 dispatch s = case s^.progMode of
   TitleScreen         -> titleScreenC
-  MainMenu            -> mainMenuC
+  MainMenu            -> mainMenuC s
   NewSeason flag      -> newSeasonC flag
   NewGame gs          -> newGameC gs
   EditMenu            -> editMenuC
@@ -49,11 +49,13 @@ dispatch s = case s^.progMode of
   EditGoalie egs      -> editGoalieC egs
   (EditStandings esm) -> editStandingsC esm
 
-mainMenuC :: Controller
+mainMenuC :: ProgState -> Controller
-mainMenuC = Controller
+mainMenuC s = if null $ s^.dbName
-  { drawController   = const $ drawMenu mainMenu
+  then promptController getDBPrompt
-  , handleController = menuHandler mainMenu
+  else Controller
-  }
+    { drawController   = const $ drawMenu mainMenu
+    , handleController = menuHandler mainMenu
+    }
 
 newSeasonC :: Bool -> Controller
 newSeasonC False = promptController newSeasonPrompt

src/Mtlstats/Menu.hs

@@ -45,7 +45,6 @@ import qualified UI.NCurses as C
 import Mtlstats.Actions
 import qualified Mtlstats.Actions.NewGame.GoalieInput as GI
 import Mtlstats.Actions.EditStandings
-import Mtlstats.Config
 import Mtlstats.Format
 import Mtlstats.Types
 import Mtlstats.Types.Menu
@@ -115,7 +114,7 @@ mainMenu = Menu "MASTER MENU" True
   , MenuItem 'C' "EDIT MENU" $
     modify edit >> return True
   , MenuItem 'E' "EXIT" $
-    saveDatabase dbFname >> return False
+    saveDatabase >> return False
   ]
 
 -- | The new season menu

src/Mtlstats/Prompt.hs

@@ -32,8 +32,10 @@ module Mtlstats.Prompt (
   namePrompt,
   numPrompt,
   numPromptWithFallback,
+  dbNamePrompt,
   selectPrompt,
   -- * Individual prompts
+  getDBPrompt,
   newSeasonPrompt,
   playerNumPrompt,
   playerNamePrompt,
@@ -168,24 +170,30 @@ numPromptWithFallback pStr fallback act = Prompt
   , promptSpecialKey  = const $ return ()
   }
 
+-- | Prompts for a database name
+dbNamePrompt
+  :: String
+  -- ^ The prompt string
+  -> (String -> Action ())
+  -- ^ The callback to pass the result to
+  -> Prompt
+dbNamePrompt pStr act = (strPrompt pStr act)
+  { promptProcessChar = \ch -> if isAlphaNum ch || ch == '-'
+    then (++[toUpper ch])
+    else id
+  }
+
 -- | Prompts the user for a filename to save a backup of the database
 -- to
 newSeasonPrompt :: Prompt
-newSeasonPrompt = prompt
+newSeasonPrompt = dbNamePrompt "Filename for new season: " $ \fn ->
-  { promptProcessChar = \ch str -> if validChar ch
+  if null fn
-    then str ++ [toUpper ch]
+  then modify backHome
-    else str
+  else do
-  }
+    saveDatabase
-  where
+    modify
-
+      $ (dbName .~ fn)
-    prompt = strPrompt "Filename to save database: " $ \fn ->
+      . (progMode .~ NewSeason True)
-      if null fn
-      then modify backHome
-      else do
-        saveDatabase $ fn ++ ".json"
-        modify $ progMode .~ NewSeason True
-
-    validChar = (||) <$> isAlphaNum <*> (=='-')
 
 -- | Builds a selection prompt
 selectPrompt :: SelectParams a -> Prompt
@@ -224,6 +232,12 @@ selectPrompt params = Prompt
     _ -> return ()
   }
 
+-- | Prompts for the database to load
+getDBPrompt :: Prompt
+getDBPrompt = dbNamePrompt "Season database to load: " $ \fn -> do
+  modify $ dbName .~ fn
+  loadDatabase
+
 -- | Prompts for a new player's number
 playerNumPrompt :: Prompt
 playerNumPrompt = numPrompt "Player number: " $

src/Mtlstats/Types.hs

@@ -50,6 +50,7 @@ module Mtlstats.Types (
   -- ** ProgState Lenses
   database,
   progMode,
+  dbName,
   inputBuffer,
   scrollOffset,
   -- ** ProgMode Lenses
@@ -233,6 +234,8 @@ data ProgState = ProgState
   -- ^ The data to be saved
   , _progMode     :: ProgMode
   -- ^ The program's mode
+  , _dbName       :: String
+  -- ^ The name of the database file
   , _inputBuffer  :: String
   -- ^ Buffer for user input
   , _scrollOffset :: Int
@@ -781,6 +784,7 @@ newProgState :: ProgState
 newProgState = ProgState
   { _database     = newDatabase
   , _progMode     = TitleScreen
+  , _dbName       = ""
   , _inputBuffer  = ""
   , _scrollOffset = 0
   }