add game rules

src/common/game_rules/GRLastStoneInBank.ts

@@ -0,0 +1,17 @@
+import { GameRule } from '../../core/GameRule';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export class GRLastStoneInBank implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    const pitType = game.board.getPitTypeByIndex(index);
+    if (
+      (pitType === 'player1Bank' && game.isTurnPlayer1()) ||
+      (pitType === 'player2Bank' && game.isTurnPlayer2())
+    ) {
+    } else {
+      game.changePlayerTurn();
+    }
+  }
+}

src/common/game_rules/GRLastStoneInEmptyPit.ts

@@ -0,0 +1,34 @@
+import { GameRule } from '../../core/GameRule';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export class GRLastStoneInEmptyPit implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    const pit = game.board.pits[index];
+    const pitType = game.board.getPitTypeByIndex(index);
+    if (pit.stoneCount === 1) {
+      if (pitType === 'player1Pit' && game.isTurnPlayer1()) {
+        const oppositePit =
+          game.board.pits[this.getOppositePitIndex(game, index)];
+        const player1BankIndex = game.board.pits[game.board.player1BankIndex()];
+        player1BankIndex.stoneCount += 1 + oppositePit.stoneCount;
+        oppositePit.stoneCount = 0;
+        pit.stoneCount = 0;
+      } else if (pitType === 'player2Pit' && game.isTurnPlayer2()) {
+        const oppositePit =
+          game.board.pits[this.getOppositePitIndex(game, index)];
+        const player2BankIndex = game.board.pits[game.board.player2BankIndex()];
+        player2BankIndex.stoneCount += 1 + oppositePit.stoneCount;
+        oppositePit.stoneCount = 0;
+        pit.stoneCount = 0;
+      }
+    }
+  }
+
+  getOppositePitIndex(game: MancalaGame, index: number) {
+    return game.board.getPitIndexCircularly(
+      index + game.board.totalPitCount() / 2
+    );
+  }
+}

src/core/GameRule.ts

@@ -0,0 +1,7 @@
+import { MancalaGame } from './MancalaGame';
+
+export interface GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void;
+  onGameMove(game: MancalaGame, index: number): void;
+  onGameMoveEnd(game: MancalaGame, index: number): void;
+}