validate subgame

lib/super.dart

@@ -13,17 +13,6 @@ class SuperGame extends StatefulWidget {
 class _SuperGameState extends State<SuperGame> {
   TTCState turn = TTCState.x;
   List<List<TTCState>> data = Util.emptyBoardSuper;
-  List<bool> subGameEnded = [
-    false,
-    false,
-    false,
-    false,
-    false,
-    false,
-    false,
-    false,
-    false,
-  ];
 
   List<TTCState> subGameWinners = [
     TTCState.empty,
@@ -36,6 +25,8 @@ class _SuperGameState extends State<SuperGame> {
     TTCState.empty,
     TTCState.empty,
   ];
+  bool subGameEnded(int i) => subGameWinners[i] != TTCState.empty;
+
   int nextPlay = -1;
 
   void _swapTurn() {
@@ -51,6 +42,42 @@ class _SuperGameState extends State<SuperGame> {
     }
   }
 
+  TTCState _validateSubGame(int index) {
+    subGameWinners[index] = Util.checkWin(data[index]);
+    return subGameWinners[index];
+  }
+
+  bool _checkValidChoice(List<TTCState> game, int index) =>
+      game[index] == TTCState.empty;
+
+  void Function(int) subGameCellOnTapCallback(int subGame) {
+    return (int i) {
+      if (!_checkValidChoice(data[subGame], i)) {
+        showDialog(
+            context: context,
+            builder: (context) => AlertDialog(
+                  content: Text("${data[subGame][i].name.toUpperCase()}"
+                      " already claimed "
+                      "[${i % 3}, ${(i / 3).floor()}]"),
+                  actions: [
+                    ElevatedButton(
+                        onPressed: () => Navigator.pop(context),
+                        child: const Text("Close"))
+                  ],
+                ));
+        return;
+      }
+
+      nextPlay = subGameEnded(i) ? -1 : i;
+      setState(() {
+        data[subGame][i] = turn;
+        _validateSubGame(subGame);
+        _swapTurn();
+      });
+      Navigator.pop(context);
+    };
+  }
+
   Widget _subGameDialog(int subGame) {
     return Dialog(
       child: Padding(
@@ -58,31 +85,30 @@ class _SuperGameState extends State<SuperGame> {
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            Text(
-              "${Util.stateText(turn)} select cell",
-              style: const TextStyle(fontWeight: FontWeight.bold),
+            Padding(
+              padding: const EdgeInsets.only(bottom: 5),
+              child: Text(
+                "${Util.stateText(turn)} select cell",
+                style: const TextStyle(fontWeight: FontWeight.bold),
+              ),
             ),
             TTCGame(
               turn: turn,
-              cellOnTapCallback: (int i) {
-                nextPlay = i;
-                setState(() {
-                  data[subGame][i] = turn;
-                  _swapTurn();
-                });
-                Navigator.pop(context);
-              },
+              cellOnTapCallback: subGameCellOnTapCallback(subGame),
               data: data[subGame],
             ),
-            Row(
-              mainAxisAlignment: MainAxisAlignment.end,
-              children: [
-                ElevatedButton(
-                    onPressed: () {
-                      Navigator.pop(context);
-                    },
-                    child: const Text("Close"))
-              ],
+            Padding(
+              padding: const EdgeInsets.only(top: 5),
+              child: Row(
+                mainAxisAlignment: MainAxisAlignment.end,
+                children: [
+                  ElevatedButton(
+                      onPressed: () {
+                        Navigator.pop(context);
+                      },
+                      child: const Text("Close"))
+                ],
+              ),
             ),
           ],
         ),
@@ -90,6 +116,18 @@ class _SuperGameState extends State<SuperGame> {
     );
   }
 
+  void endedSubGameNotification(int index) {
+    ScaffoldMessenger.of(context)
+      ..clearSnackBars()
+      ..showSnackBar(
+        SnackBar(
+          content: Text("${Util.stateText(subGameWinners[index])}"
+              " already won the game at "
+              "[${Util.cellAddress(index)}]"),
+        ),
+      );
+  }
+
   void _showSubGameDialog(int i) {
     if (nextPlay == i || nextPlay == -1) {
       showDialog(
@@ -112,6 +150,10 @@ class _SuperGameState extends State<SuperGame> {
 
   @override
   Widget build(BuildContext context) {
+    Iterable.generate(subGameWinners.length)
+        .map((i) => subGameEnded(i))
+        .forEach(print);
+
     return Column(
       children: [
         const Spacer(flex: 5),
@@ -123,7 +165,9 @@ class _SuperGameState extends State<SuperGame> {
         ),
         const Spacer(flex: 1),
         GameHash(
-            cellOnTapCallback: _showSubGameDialog,
+            cellOnTapCallback: (i) => subGameEnded(i)
+                ? endedSubGameNotification(i)
+                : _showSubGameDialog(i),
             children: Iterable.generate(data.length)
                 .map(
                   (i) => DecoratedBox(
@@ -132,10 +176,15 @@ class _SuperGameState extends State<SuperGame> {
                     ),
                     child: Padding(
                       padding: const EdgeInsets.all(15),
-                      child: TTCGame(
-                        turn: turn,
-                        data: data[i],
-                      ),
+                      child: !subGameEnded(i)
+                          ? TTCGame(
+                              turn: turn,
+                              data: data[i],
+                            )
+                          : Text(
+                              subGameWinners[i].name.toUpperCase(),
+                              style: const TextStyle(fontSize: 40),
+                            ),
                     ),
                   ),
                 )

lib/util.dart

@@ -26,6 +26,8 @@ class Util {
       ];
 
   static String stateText(TTCState state) => state.name.toUpperCase();
+  static String cellAddress(int index) =>
+      "${index % 3}, ${(index / 3).floor()}";
 
   static Iterable<TTCState> getRow(int index, List<TTCState> data) =>
       data.getRange(index, index + 3);