✨ (game): Generate grid & User Interactions

Generate grid with bombs & numbers, user interactions like, click on a cell, pin a flag

src/App.scss

@@ -1,3 +1,7 @@
 .App {
-	text-align: center;
+	display: flex;
+	justify-content: center;
+	align-items: center;
+	width: 100%;
+	height: 100%;
 }

src/App.tsx

@@ -1,22 +1,10 @@
-import React from 'react';
 import './App.scss';
+import Grid from './components/Grid/Grid';
 
 const App = () => {
 	return (
 		<div className='App'>
-			<header className='App-header'>
-				<p>
-					Edit <code>src/App.tsx</code> and save to reload.
-				</p>
-				<a
-					className='App-link'
-					href='https://reactjs.org'
-					target='_blank'
-					rel='noopener noreferrer'
-				>
-					Learn React
-				</a>
-			</header>
+			<Grid />
 		</div>
 	);
 };

src/components/Grid/Grid.tsx

@@ -0,0 +1,134 @@
+// ---------------------------------------------------------------------------------------------------------------------
+//!                                                       Imports
+// ---------------------------------------------------------------------------------------------------------------------
+
+// ------------------------------------------------------ React --------------------------------------------------------
+import { MouseEvent, useCallback, useEffect, useState } from 'react';
+// ---------------------------------------------------------------------------------------------------------------------
+
+// ------------------------------------------------------ Utils --------------------------------------------------------
+import { Difficulty } from '../../types/game';
+import { discoverAroundCell, genBombs, genGrid, genNumbers } from '../../utils/game';
+// ---------------------------------------------------------------------------------------------------------------------
+
+// ----------------------------------------------------- Assets --------------------------------------------------------
+import Bomb from '../../assets/bomb.png';
+import Flag from '../../assets/flag.png';
+import './styles.scss';
+// ---------------------------------------------------------------------------------------------------------------------
+
+const Grid = ({ size = 12, difficulty = 'beginner' }) => {
+	const [grid, setGrid] = useState(genGrid(size));
+	const [gameStatus, setGameStatus] = useState('idle');
+
+	const [, updateGrid] = useState({});
+	const forceUpdate = useCallback(() => updateGrid({}), []);
+
+	// ----------------------------------------------------- Actions -------------------------------------------------------
+	const handleLeftClick = (ev: MouseEvent, rowIndex: number, colIndex: number) => {
+		ev.preventDefault();
+
+		if (grid[rowIndex][colIndex].hidden && !grid[rowIndex][colIndex].flag) {
+			setGrid((prev) => {
+				if (gameStatus === 'idle') {
+					do {
+						prev = genNumbers(genBombs(prev, difficulty as Difficulty));
+					} while (prev[rowIndex][colIndex].value !== 'empty');
+					setGameStatus('started');
+				}
+
+				return discoverAroundCell(prev, rowIndex, colIndex);
+			});
+			forceUpdate();
+		}
+	};
+
+	const handleRightClick = (ev: MouseEvent, rowIndex: number, colIndex: number) => {
+		ev.preventDefault();
+
+		if (grid[rowIndex][colIndex].hidden) {
+			setGrid((prev) => {
+				return prev.map((row, idx) => {
+					if (idx === rowIndex) {
+						return row.map((col, idy) => {
+							if (idy === colIndex) {
+								return {
+									...col,
+									flag: !col.flag,
+								};
+							}
+							return col;
+						});
+					}
+					return row;
+				});
+			});
+		}
+	};
+
+	// --- Development
+	useEffect(() => {
+		if (process.env.NODE_ENV === 'development') {
+			document.addEventListener('keyup', (ev) => {
+				if (ev.key === 'v') {
+					setGrid(() => {
+						let newGrid = genGrid(size);
+
+						return genNumbers(genBombs(newGrid, difficulty as Difficulty));
+					});
+				}
+			});
+		}
+	}, [size, difficulty]);
+	// ---------------------------------------------------------------------------------------------------------------------
+
+	return (
+		<div
+			className='grid'
+			style={{
+				gridTemplateRows: `repeat(${size}, var(--size))`,
+			}}
+		>
+			{grid.map((row, rowIndex) => (
+				<div
+					key={`row${rowIndex}`}
+					className='row'
+					style={{
+						gridTemplateColumns: `repeat(${size}, var(--size))`,
+					}}
+				>
+					{row.map((cell, cellIndex) => {
+						return (
+							<button
+								key={`cell${cellIndex}`}
+								className={`cell ${cell.hidden ? 'hidden' : cell.value !== 'empty' ? `v${cell.value}` : ''}`}
+								onClick={(ev) => handleLeftClick(ev, rowIndex, cellIndex)}
+								onContextMenu={(ev) => handleRightClick(ev, rowIndex, cellIndex)}
+							>
+								{cell.hidden && cell.flag && (
+									<img
+										src={Flag}
+										alt='flat'
+									/>
+								)}
+								{!cell.hidden &&
+									(cell.value === 'bomb' ? (
+										<img
+											src={Bomb}
+											alt='bomb'
+										/>
+									) : cell.value !== 'empty' ? (
+										cell.value
+									) : (
+										''
+									))}
+							</button>
+						);
+					})}
+				</div>
+			))}
+		</div>
+	);
+};
+
+export default Grid;

src/components/Grid/styles.scss

@@ -0,0 +1,76 @@
+.grid {
+	--size: 30px;
+	display: grid;
+	gap: 2px;
+	padding: 2px;
+	border-radius: 5px;
+	background-color: #ffff;
+	overflow: hidden;
+
+	& > .row {
+		display: grid;
+		gap: 2px;
+		height: var(--size);
+
+		& > .cell {
+			display: flex;
+			justify-content: center;
+			align-items: center;
+			width: var(--size);
+			border: none;
+			background-color: #f6f6f6;
+			font-weight: 700;
+			outline: none;
+
+			&.hidden {
+				background-color: #dedede;
+				cursor: pointer;
+			}
+
+			&.v1 {
+				color: blue;
+			}
+
+			&.v2 {
+				color: green;
+			}
+
+			&.v3 {
+				color: orange;
+			}
+
+			&.v4 {
+				color: red;
+			}
+
+			&.v5 {
+				color: purple;
+			}
+
+			& > img {
+				width: 70%;
+				height: 70%;
+				object-fit: cover;
+			}
+		}
+
+		&:first-child > .cell {
+			&:first-child {
+				border-top-left-radius: 5px;
+			}
+
+			&:last-child {
+				border-top-right-radius: 5px;
+			}
+		}
+		&:last-child > .cell {
+			&:first-child {
+				border-bottom-left-radius: 5px;
+			}
+
+			&:last-child {
+				border-bottom-right-radius: 5px;
+			}
+		}
+	}
+}

src/index.scss

@@ -5,5 +5,12 @@
 	font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
 	-webkit-font-smoothing: antialiased;
 	-moz-osx-font-smoothing: grayscale;
+	user-select: none;
 }
 
+#root {
+	width: 100svw;
+	height: 100svh;
+	background: #598b8e;
+	overflow: hidden;
+}

src/types/game.d.ts

@@ -0,0 +1,3 @@
+export type Difficulty = 'beginner' | 'intermediate' | 'expert';
+export type CellValue = 'empty' | 'bomb' | number;
+export type GridType = { hidden: boolean; value: CellValue; flag: boolean }[][];

src/utils/game.ts

@@ -0,0 +1,143 @@
+import { Difficulty, CellValue, GridType } from '../types/game';
+import { getRandomArbitrary } from './generics';
+
+export const genGrid = (size: number): GridType => {
+	let grid: GridType = Array.apply(null, Array(size)).map(() => {
+		return Array.apply(null, Array(size)).map(() => {
+			return {
+				hidden: true,
+				value: 'empty',
+				flag: false,
+			};
+		});
+	});
+
+	return grid;
+};
+
+export const genBombs = (grid: GridType, difficulty: Difficulty) => {
+	const surface = grid.length * grid.length;
+
+	let bombs = 0;
+	if (difficulty === 'beginner') {
+		bombs = surface * 0.05;
+	} else if (difficulty === 'intermediate') {
+		bombs = surface * 0.1;
+	} else if (difficulty === 'expert') {
+		bombs = surface * 0.15;
+	}
+
+	bombs = Math.floor(bombs);
+
+	for (let i = 0; i <= bombs; i++) {
+		let needRegenerate = false;
+
+		do {
+			const row = getRandomArbitrary(0, grid.length);
+			const col = getRandomArbitrary(0, grid.length);
+			let bombsArounds = 0;
+
+			for (let testRowIndex = -1; testRowIndex <= 1; testRowIndex++) {
+				const testedRow = row + testRowIndex;
+
+				if (testedRow < 0) continue;
+				if (testedRow >= grid.length) continue;
+
+				for (let testColIndex = -1; testColIndex <= 1; testColIndex++) {
+					const testedCol = col + testColIndex;
+
+					if (testedCol < 0) continue;
+					if (testedCol >= grid.length) continue;
+					if (testedRow === row && testedCol === col) continue;
+
+					if (grid[testedRow][testedCol].value === 'bomb') {
+						bombsArounds++;
+
+						if (bombsArounds > 3) {
+							needRegenerate = true;
+							break;
+						}
+					}
+				}
+
+				if (needRegenerate) break;
+			}
+
+			if (bombsArounds <= 3) {
+				grid[row][col].value = 'bomb';
+			}
+		} while (needRegenerate);
+	}
+
+	return grid;
+};
+
+export const genNumbers = (grid: GridType): GridType => {
+	for (let row = 0; row < grid.length; row++) {
+		for (let col = 0; col < grid[row].length; col++) {
+			let bombsArounds = 0;
+
+			checkAroundCell(grid, row, col, (testedCell: { hidden: boolean; value: CellValue }, testedRow: number, testedCol: number) => {
+				if (testedCell.value === 'bomb') {
+					bombsArounds++;
+				}
+			});
+
+			if (bombsArounds > 0) {
+				grid[row][col].value = bombsArounds;
+			}
+		}
+	}
+
+	return grid;
+};
+
+export const checkAroundCell = (grid: GridType, row: number, col: number, callback: Function): void => {
+	for (let testRowIndex = -1; testRowIndex <= 1; testRowIndex++) {
+		const testedRow = row + testRowIndex;
+
+		if (testedRow < 0) continue;
+		if (testedRow >= grid.length) continue;
+
+		for (let testColIndex = -1; testColIndex <= 1; testColIndex++) {
+			const testedCol = col + testColIndex;
+
+			if (testedCol < 0) continue;
+			if (testedCol >= grid.length) continue;
+			if (testedRow === row && testedCol === col) continue;
+
+			callback(grid[testedRow][testedCol], testedRow, testedCol);
+		}
+	}
+};
+
+export const discoverAroundCell = (grid: GridType, rowIndex: number, colIndex: number): GridType => {
+	grid[rowIndex][colIndex].hidden = false;
+
+	checkAroundCell(grid, rowIndex, colIndex, (cell: { hidden: boolean; value: CellValue; flag: boolean }, testedRowIndex: number, testedColIndex: number) => {
+		if (!cell.flag && cell.hidden) {
+			if (cell.value === 'empty') {
+				grid = discoverAroundCell(grid, testedRowIndex, testedColIndex);
+			} else if (typeof cell.value === 'number') {
+				grid[testedRowIndex][testedColIndex].hidden = false;
+			}
+		}
+	});
+
+	return grid;
+};
+
+export const revealAllGrid = (grid: GridType, excludeGoodFlags: boolean = true) => {
+	return grid.map((row) => {
+		return row.map((col) => {
+			if (excludeGoodFlags && col.value === 'bomb' && col.flag) {
+				return col;
+			}
+			return {
+				...col,
+				hidden: false,
+				flag: false,
+			};
+		});
+	});
+};

src/utils/generics.ts

@@ -0,0 +1,3 @@
+export const getRandomArbitrary = (min: number, max: number): number => {
+	return Math.floor(Math.random() * (max - min) + min);
+};