simplified application state

src/Password/App/Draw.hs

@@ -22,25 +22,33 @@ License along with this program.  If not, see
 
 -}
 
+{-# LANGUAGE OverloadedStrings #-}
+
 module Password.App.Draw (drawFunc) where
 
-import Brick (Widget, txt, vBox)
-import Brick.Forms (renderForm)
+import Brick (Widget, emptyWidget, txt, vBox)
+import Brick.Forms (Form, formState, renderForm)
+import Data.Text (Text)
 import Lens.Micro ((^.))
 
 import Password.App.Types
 
 -- | Renders the application view
 drawFunc :: AppState -> [Widget ResName]
-drawFunc s = case s^.appMode of
-  InitMode is -> drawPassForm is
+drawFunc s = maybe [emptyWidget] drawPassForm $ s^.passForm
 
-drawPassForm :: InitState -> [Widget ResName]
-drawPassForm is =
+drawPassForm :: Form (Text, Text) () ResName -> [Widget ResName]
+drawPassForm f =
   [ vBox
-    [ renderForm $ is^.setPassForm
-    , txt $ is^.spfError
+    [ renderForm f
+    , txt $ pfText $ formState f
     ]
   ]
 
+pfText :: (Text, Text) -> Text
+pfText (pass, conf)
+  | pass == ""   = "Password cannot be blank."
+  | pass /= conf = "Passwords do not match."
+  | otherwise    = ""
+
 --jl

src/Password/App/Event.hs

@@ -43,7 +43,7 @@ import Control.Monad.IO.Class (liftIO)
 import Control.Monad.State.Class (gets, put)
 import Data.Aeson (decodeFileStrict)
 import Graphics.Vty.Input.Events (Event (EvKey))
-import Lens.Micro ((^.))
+import Lens.Micro (each, (^.))
 import Lens.Micro.Mtl (zoom)
 import System.EasyFile
   ( createDirectoryIfMissing
@@ -77,9 +77,9 @@ loadDatabase = zoom database $ liftIO
   ) >>= mapM_ put
 
 fallbackHandler :: BrickEvent ResName () -> EventM ResName AppState ()
-fallbackHandler e = gets (^.appMode) >>= \case
-  InitMode _ -> zoom (appMode.initState.setPassForm) $
-    handleFormEvent e
+fallbackHandler e = gets (^.passForm) >>= \case
+  Just _  -> zoom (passForm.each) $ handleFormEvent e
+  Nothing -> return ()
 
 getKeyDispatcher
   :: AppState

src/Password/App/Types.hs

@@ -27,19 +27,13 @@ License along with this program.  If not, see
 module Password.App.Types (
   -- * Types
   AppState (..),
-  AppMode (..),
-  InitState (..),
   ResName (..),
   -- * Lenses
   -- ** AppState
   randGen,
   database,
-  appMode,
-  -- ** AppMode
-  initState,
-  -- ** InitState
-  setPassForm,
-  spfError,
+  mainPass,
+  passForm,
   -- * Constructors
   mkInitialState,
   ) where
@@ -60,23 +54,13 @@ data AppState = AppState
   -- ^ The random number generator
   , _database :: PWDatabase
   -- ^ The password database
-  , _appMode :: AppMode
-  -- ^ The current operating mode
+  , _mainPass :: String
+  -- ^ The main password
+  , _passForm :: Maybe PassForm
   }
 
--- | The applicaiton's mode
-newtype AppMode = InitMode
-  { _initState :: InitState
-  -- ^ Initialization state
-  }
-
--- | Application initialization state
-data InitState = InitState
-  { _setPassForm :: Form (Text, Text) () ResName
-  -- ^ password form
-  , _spfError :: Text
-  -- ^ error message
-  }
+-- | A password form (with confirmation)
+type PassForm = Form (Text, Text) () ResName
 
 -- | Resource identifier
 data ResName
@@ -84,28 +68,22 @@ data ResName
   | ConfField
   deriving (Eq, Ord, Show)
 
-concat <$> mapM makeLenses
-  [ ''AppState
-  , ''AppMode
-  , ''InitState
-  ]
+makeLenses ''AppState
 
 -- | Builds an initial state
 mkInitialState :: MonadIO m => m AppState
 mkInitialState = AppState
   <$> initStdGen
   <*> return newPWDatabase
-  <*> return (InitMode newInitState)
+  <*> return ""
+  <*> return (Just newPassForm)
 
--- | New `InitState` value
-newInitState :: InitState
-newInitState = InitState
-  ( newForm
+-- | Constructs a blank password form
+newPassForm :: PassForm
+newPassForm = newForm
   [ (txt "Master password: " <+>) @@= editPasswordField _1 PassField
   , (txt "Confirm password: " <+>) @@= editPasswordField _2 ConfField
   ]
   ("", "")
-  )
-  ""
 
 --jl