added strategies

src/TicTacToe/strategies/ColumnWinningStratergies.java

@@ -0,0 +1,38 @@
+package TicTacToe.strategies;
+
+import TicTacToe.models.Board;
+import TicTacToe.models.Move;
+import TicTacToe.models.Symbol;
+
+import java.util.HashMap;
+
+public class ColumnWinningStratergies implements WinningStrategy {
+
+    HashMap<Integer, HashMap<Symbol, Integer>> counts = new HashMap<>();
+    @Override
+    public boolean checkWinner(Board board , Move move) {
+
+        // O(1)
+        // 0 -> {"X" , 2}
+        // 0 -> {"O" , 0}
+        int c = move.getCell().getCol();
+        Symbol symbol = move.getCell().getSymbol();
+
+        if(!counts.containsKey(c)){
+            counts.put(c, new HashMap<>());
+        }
+
+        HashMap<Symbol, Integer> countCol = counts.get(c);
+
+        if(!countCol.containsKey(symbol)){
+            countCol.put(symbol, 0);
+        }
+        countCol.put(symbol, countCol.get(symbol) + 1);
+
+        return  countCol.get(symbol) == board.getSize();
+
+    }
+}
+
+
+

src/TicTacToe/strategies/RowWinningStrategy.java

@@ -1,7 +1,31 @@
 package TicTacToe.strategies;
 
+import TicTacToe.models.Board;
+import TicTacToe.models.Move;
+import TicTacToe.models.Symbol;
+
+import java.util.HashMap;
+
 public class RowWinningStrategy implements WinningStrategy {
-    public void checkWinner() {
-        System.out.println("Checking for row win");
+
+    HashMap<Integer, HashMap<Symbol, Integer>> counts = new HashMap<>();
+    public boolean checkWinner(Board board , Move move) {
+        // O(1)
+        // 0 -> {{"X" , 2}, {"O" , 1}}
+        int r = move.getCell().getRow();
+        Symbol symbol = move.getCell().getSymbol();
+
+        if(!counts.containsKey(r)){
+            counts.put(r, new HashMap<>());
+        }
+
+        HashMap<Symbol, Integer> countRow = counts.get(r);
+
+        if(!countRow.containsKey(symbol)){
+            countRow.put(symbol, 0);
+        }
+        countRow.put(symbol, countRow.get(symbol) + 1);
+
+        return  countRow.get(symbol) == board.getSize();
     }
 }

src/TicTacToe/strategies/WinningStrategy.java

@@ -1,6 +1,9 @@
 package TicTacToe.strategies;
 
+import TicTacToe.models.Board;
+import TicTacToe.models.Move;
+
 public interface WinningStrategy {
 
-    public void checkWinner();
+    public boolean checkWinner(Board board , Move move);
 }