Create user interractions

app/Main.hs

@@ -3,6 +3,7 @@ module Main where
 import           Lib
 import           System.Environment
 import           System.Random
+import           Text.Read
 
 main :: IO ()
 main = do
@@ -11,5 +12,35 @@ main = do
       boardLength = read (args !! 1)
       bombs = read (args !! 2)
   generator <- newStdGen
-  putStrLn . printBoard . revealAll . createBoard boardWidth boardLength $
-    generateRandomCoordinates (boardWidth-1) (boardLength-1) bombs generator
+  gameStep . createBoard boardWidth boardLength $
+    generateRandomCoordinates (boardWidth - 1) (boardLength - 1) bombs generator
+
+gameStep :: Board -> IO ()
+gameStep board = do
+  putStrLn . convertBoardToString $ board
+  coordinates <- getCoordinates
+  let nextBoard = revealTile coordinates board
+  if isGameLost nextBoard
+    then gameLost nextBoard
+    else if isGameWon nextBoard
+           then gameWon nextBoard
+           else gameStep nextBoard
+
+getCoordinates :: IO (Int, Int)
+getCoordinates = do
+  putStrLn "Enter the coordinates of the tile to reveal (X then Y, zero indexed):"
+  xString <- getLine
+  yString <- getLine
+  case (readMaybe xString, readMaybe yString) of
+    (Just x, Just y) -> return (x,y)
+    _ -> putStrLn "Invalid coordinates!" >> getCoordinates
+
+gameLost :: Board -> IO ()
+gameLost board = do
+  putStrLn . convertBoardToString . revealAll $ board
+  putStrLn "Boom! You lost!"
+
+gameWon :: Board -> IO ()
+gameWon board = do
+  putStrLn . convertBoardToString $ board
+  putStrLn "You won! All the bombs were found!"

src/Lib.hs

@@ -1,10 +1,11 @@
 module Lib
   ( createBoard
   , generateRandomCoordinates
-  , flagTile
   , revealTile
-  , printBoard
+  , convertBoardToString
   , revealAll
+  , isGameLost
+  , isGameWon
   , Board
   , Tile(..)
   , TileState(..)
@@ -22,7 +23,6 @@ data Tile
 
 data TileState
   = Hidden
-  | Flagged
   | Revealed
   deriving (Eq, Show)
 
@@ -39,16 +39,6 @@ createBoard boardWidth boardLength = foldr placeBomb createClearBoard
         (Just (Value value Hidden)) -> replaceTile board (x, y) (Value (value + 1) Hidden)
         _ -> board
 
-flagTile :: Coordinates -> Board -> Board
-flagTile (x, y) board =
-  case findTile board (x, y) of
-    (Just tile) -> flagHiddenTile tile
-    Nothing     -> board
-  where
-    flagHiddenTile (Value value Hidden) = replaceTile board (x, y) (Value value Flagged)
-    flagHiddenTile (Bomb Hidden) = replaceTile board (x, y) (Bomb Flagged)
-    flagHiddenTile _ = board
-
 revealTile :: Coordinates -> Board -> Board
 revealTile (x, y) board =
   case findTile board (x, y) of
@@ -87,16 +77,15 @@ coordinatesExists board (x, y) = isPositive && isYWithinTheBoard board && isXWit
     isYWithinTheBoard = (> y) . length
     isXWithinTheBoard = any ((> x) . length)
 
-printBoard :: Board -> String
-printBoard = concatMap printLine
+convertBoardToString :: Board -> String
+convertBoardToString = concatMap printLine
   where
-    printLine line = concatMap printTile line ++ "\n"
-    printTile (Bomb Hidden)      = "#"
-    printTile (Bomb Revealed)    = "B"
-    printTile (Value _ Hidden)   = "#"
+    printLine line = concatMap ((' ' :) . printTile) line ++ "\n"
+    printTile (Bomb Hidden)      = "■"
+    printTile (Bomb Revealed)    = "✸"
+    printTile (Value _ Hidden)   = "■"
+    printTile (Value 0 Revealed) = "□"
     printTile (Value x Revealed) = show x
-    printTile (Bomb Flagged)     = "F"
-    printTile (Value _ Flagged)  = "F"
 
 mapAroundTile :: (Coordinates -> Board -> Board) -> Coordinates -> Board -> Board
 mapAroundTile f (x, y) =
@@ -109,3 +98,17 @@ generateRandomCoordinates maxX maxY count generator = take count . nub $ zip ran
     (xGen, yGen) = split generator
     randomXs = randomRs (0, maxX) xGen
     randomYs = randomRs (0, maxY) yGen
+
+isGameLost :: Board -> Bool
+isGameLost = any isRevealedBomb . concat
+  where
+    isRevealedBomb :: Tile -> Bool
+    isRevealedBomb (Bomb Revealed) = True
+    isRevealedBomb _               = False
+
+isGameWon :: Board -> Bool
+isGameWon = all isRevealedValueOrHidden . concat
+  where
+    isRevealedValueOrHidden (Value _ Revealed) = True
+    isRevealedValueOrHidden (Bomb Hidden)      = True
+    isRevealedValueOrHidden _                  = False

test/Spec.hs

@@ -3,7 +3,7 @@ import           Test.Tasty
 import           Test.Tasty.HUnit
 
 main :: IO ()
-main = defaultMain $ testGroup "Minesweeper tests" [flagTileTest, revealTileTest, createBoardTest]
+main = defaultMain $ testGroup "Minesweeper tests" [revealTileTest, createBoardTest]
 
 hiddenBoard :: Board
 hiddenBoard =
@@ -19,27 +19,6 @@ revealedBoard =
   , [Value 0 Revealed, Value 0 Revealed, Value 0 Revealed]
   ]
 
-flagTileTest :: TestTree
-flagTileTest =
-  testGroup
-    "Flag tile"
-    [ testCase "Empty board" $ flagTile (1, 1) [] @?= []
-    , testCase "Flag bomb tile" $
-      flagTile (0, 0) hiddenBoard @?=
-      [ [Bomb Flagged, Value 1 Hidden, Value 0 Hidden]
-      , [Value 1 Hidden, Value 1 Hidden, Value 0 Hidden]
-      , [Value 0 Hidden, Value 0 Hidden, Value 0 Hidden]
-      ]
-    , testCase "Flag value tile" $
-      flagTile (2, 0) hiddenBoard @?=
-      [ [Bomb Hidden, Value 1 Hidden, Value 0 Flagged]
-      , [Value 1 Hidden, Value 1 Hidden, Value 0 Hidden]
-      , [Value 0 Hidden, Value 0 Hidden, Value 0 Hidden]
-      ]
-    , testCase "Flag revealed bomb tile" $ flagTile (0, 0) revealedBoard @?= revealedBoard
-    , testCase "Flag revealed value tile" $ flagTile (1, 2) revealedBoard @?= revealedBoard
-    ]
-
 revealTileTest :: TestTree
 revealTileTest =
   testGroup