add Game Rule that Double Stone in Pit

src/common/game_rules/GRDoubleStoneInPit.ts

@@ -0,0 +1,44 @@
+import { GameRule } from '../../core/GameRule';
+import { GameStep } from '../../core/HistoryItem';
+import { MancalaGame } from '../../core/MancalaGame';
+
+export const GAME_STEP_DOUBLE_STONE_IN_PIT = 'GAME_STEP_DOUBLE_STONE_IN_PIT';
+
+export type DoubleStoneInPitData = { pitIndex: number; bankIndex: number };
+
+export class GRDoubleStoneInPit implements GameRule {
+  onGameMoveStart(game: MancalaGame, index: number): void {}
+  onGameMove(game: MancalaGame, index: number): void {}
+  onGameMoveEnd(game: MancalaGame, index: number): void {
+    index = game.board.getPitIndexCircularly(index);
+    const pit = game.board.pits[index];
+    const pitType = game.board.getPitTypeByIndex(index);
+    if (pit.stoneCount % 2 === 0) {
+      if (pitType === 'player1Pit' && game.isTurnPlayer2()) {
+        const pitIndex = index;
+        const bankIndex = game.board.player2BankIndex();
+        game.board.player2Bank.stoneCount +=
+          game.board.getPitCircularly(pitIndex).stoneCount;
+        game.board.getPitCircularly(pitIndex).stoneCount = 0;
+        this.addGameStep(game, index, { pitIndex, bankIndex });
+      } else if (pitType === 'player2Pit' && game.isTurnPlayer1()) {
+        const pitIndex = index;
+        const bankIndex = game.board.player1BankIndex();
+        game.board.player1Bank.stoneCount +=
+          game.board.getPitCircularly(pitIndex).stoneCount;
+        game.board.getPitCircularly(pitIndex).stoneCount = 0;
+        this.addGameStep(game, index, { pitIndex, bankIndex });
+      }
+    }
+  }
+
+  private addGameStep(
+    game: MancalaGame,
+    index: number,
+    doubleStoneInPitData: DoubleStoneInPitData
+  ) {
+    game.addGameStep(
+      new GameStep(index, GAME_STEP_DOUBLE_STONE_IN_PIT, doubleStoneInPitData)
+    );
+  }
+}