From 722f3e0ac7fd3bc8e9d4728f94cb2811052b0e33 Mon Sep 17 00:00:00 2001
From: Nikita Ovchinnikov <nickovchinnikof@gmail.com>
Date: Wed, 13 Oct 2021 13:40:08 +0400
Subject: [PATCH] Game module by TDD (Ducks)

---
 README.md                              |  4 ++
 src/modules/GameWithRedux/game.test.ts | 70 +++++++++++++++++++
 src/modules/GameWithRedux/game.ts      | 94 ++++++++++++++++++++++++++
 3 files changed, 168 insertions(+)
 create mode 100644 src/modules/GameWithRedux/game.test.ts
 create mode 100644 src/modules/GameWithRedux/game.ts

diff --git a/README.md b/README.md
index 257c3ad..2a662e3 100644
--- a/README.md
+++ b/README.md
@@ -298,3 +298,7 @@
 ### Redux basic example
 
 [Pull request](https://github.com/nickovchinnikov/minesweeper/pull/53/files)
+
+### Game module by TDD (Ducks)
+
+[Pull request](https://github.com/nickovchinnikov/minesweeper/pull/54/files)
diff --git a/src/modules/GameWithRedux/game.test.ts b/src/modules/GameWithRedux/game.test.ts
new file mode 100644
index 0000000..fd5bffd
--- /dev/null
+++ b/src/modules/GameWithRedux/game.test.ts
@@ -0,0 +1,70 @@
+import { GameSettings } from '@/modules/GameSettings';
+import { CellState, Field } from '@/core/Field';
+
+const { empty: e, hidden: h, bomb: b, flag: f, weakFlag: w } = CellState;
+
+import { reducer, openCell, State } from './game';
+
+describe('Game reducer', () => {
+  const level = 'beginner';
+  const baseInitialState: State = {
+    level,
+    time: 0,
+    isGameOver: false,
+    isGameStarted: false,
+    isWin: false,
+    settings: GameSettings[level],
+    bombs: 0,
+    flagCounter: 0,
+    gameField: [
+      [9, 1],
+      [1, 1],
+    ],
+    playerField: [
+      [h, h],
+      [h, h],
+    ],
+  };
+
+  describe('Action openCell simple case', () => {
+    it('Check openCell to cell with a number', () => {
+      expect(reducer(baseInitialState, openCell([1, 1]))).toEqual({
+        ...baseInitialState,
+        isGameStarted: true,
+        playerField: [
+          [h, h],
+          [h, 1],
+        ],
+      });
+    });
+    it('Check openCell to cell with a bomb', () => {
+      expect(reducer(baseInitialState, openCell([0, 0]))).toEqual({
+        ...baseInitialState,
+        isGameStarted: false,
+        isWin: false,
+        isGameOver: true,
+        playerField: baseInitialState.gameField,
+      });
+    });
+    it('Check openCell to cell with a flag', () => {
+      const playerFieldWithFlag = [
+        [h, h],
+        [h, f],
+      ] as Field;
+      expect(
+        reducer(
+          {
+            ...baseInitialState,
+            isGameStarted: true,
+            playerField: playerFieldWithFlag,
+          },
+          openCell([1, 1])
+        )
+      ).toEqual({
+        ...baseInitialState,
+        isGameStarted: true,
+        playerField: playerFieldWithFlag,
+      });
+    });
+  });
+});
diff --git a/src/modules/GameWithRedux/game.ts b/src/modules/GameWithRedux/game.ts
new file mode 100644
index 0000000..36ffe89
--- /dev/null
+++ b/src/modules/GameWithRedux/game.ts
@@ -0,0 +1,94 @@
+import { AnyAction, Reducer } from 'redux';
+
+import {
+  Field,
+  CellState,
+  generateFieldWithDefaultState,
+  fieldGenerator,
+  Coords,
+} from '@/core/Field';
+import { LevelNames, GameSettings } from '@/modules/GameSettings';
+import { openCell as openCellHandler } from '@/core/openCell';
+
+export interface State {
+  level: LevelNames;
+  time: number;
+  bombs: number;
+  isGameOver: boolean;
+  isGameStarted: boolean;
+  isWin: boolean;
+  settings: [number, number];
+  playerField: Field;
+  gameField: Field;
+  flagCounter: number;
+}
+
+export const getInitialState = (): State => {
+  const level = 'beginner';
+  const settings = GameSettings[level];
+  const [size, bombs] = settings;
+
+  return {
+    level,
+    time: 0,
+    bombs,
+    isGameOver: false,
+    isGameStarted: false,
+    isWin: false,
+    settings,
+    flagCounter: 0,
+    playerField: generateFieldWithDefaultState(size, CellState.hidden),
+    gameField: fieldGenerator(size, bombs / (size * size)),
+  };
+};
+
+// Actions
+const OPEN_CELL = 'modules/GameWithRedux/OPEN_CELL';
+
+// Action Creators
+export const openCell = (coords: Coords): AnyAction => ({
+  type: OPEN_CELL,
+  payload: { coords },
+});
+
+// Reducer
+export const reducer: Reducer<State> = (
+  state = getInitialState(),
+  action: AnyAction
+) => {
+  const { playerField, gameField } = state;
+
+  switch (action.type) {
+    case OPEN_CELL: {
+      const {
+        payload: { coords },
+      } = action;
+
+      try {
+        const [newPlayerField, isSolved] = openCellHandler(
+          coords,
+          playerField,
+          gameField
+        );
+
+        return {
+          ...state,
+          isGameStarted: true,
+          isGameOver: isSolved,
+          isWin: isSolved,
+          playerField: newPlayerField,
+        };
+      } catch (error) {
+        return {
+          ...state,
+          isGameStarted: false,
+          isGameOver: true,
+          isWin: false,
+          playerField: gameField,
+        };
+      }
+    }
+    default:
+      return state;
+  }
+};