react-battleships-engine

React Battleship Engine

This package provides a TypeScript engine for the classic Battleship game, adapted for React using a custom hook, useGameBoard. The hook manages the game logic, including ship placement, tracking hits, and checking for victory conditions.

Based on the original battleships-engine.

Installation

Install the package with npm or yarn:

npm install react-battleships-engine

or

pnpm add react-battleships-engine

or

yarn add react-battleships-engine

Usage

Importing the Hook

You can import the useGameBoard hook and necessary types from the package:

import { useGameBoard, TCoords, ShipType, Direction  } from "react-battleships-engine";

Example

Using the Hook in a React Component

You can use the useGameBoard hook to initialize a game board, place ships, and handle player actions.

import React, { useEffect } from "react";
import { useGameBoard } from "react-battleships-engine";

const BattleshipGame: React.FC = () => {
    const {
        ships,
        placeShip,
        randomlyPlaceShips,
        receiveAttack,
        hasLost,
        missed,
    } = useGameBoard();

    // Example: Place ships randomly when the game starts
    useEffect(() => {
        randomlyPlaceShips();
    }, []);

    // Example: Handle a player attack
    const handleAttack = (coords: { x: number, y: number }) => {
        try {
            receiveAttack(coords);
        } catch (error) {
            console.error(error.message);
        }
    };

    return (
        <div>
            <h1>Battleship Game</h1>
            <button onClick={() => randomlyPlaceShips()}>
                Randomly Place Ships
            </button>
            <button onClick={() => handleAttack({ x: 3, y: 5 })}>
                Attack (3, 5)
            </button>
            {hasLost() && <p>You lost!</p>}
        </div>
    );
};

export default BattleshipGame;

Available Hook Methods

useGameBoard(initialShips?: Ship[])

The useGameBoard hook manages the game board state and logic. It returns a set of methods and state for interacting with the board.

• placeShip(params: { type: ShipType; coords: TCoords; direction: Direction }): Manually place a ship on the board at specific coordinates.
• randomlyPlaceShips(): Randomly place all ships on the game board.
• receiveAttack(coords: TCoords): Process an attack at the specified coordinates.
• hasLost(): Returns true if all ships are sunk.
• resetGameBoard(): Resets the board and state for a new game.

Ship Placement Example

Manually Placing a Ship

You can manually place a ship on the board by specifying its type, coordinates, and direction:

placeShip({
    type: "battleship",
    coords: { x: 3, y: 5 },
    direction: "hor", // horizontal
});

Randomly Placing Ships

To randomly place all ships on the board:

randomlyPlaceShips();

Attack Example

Handling an Attack

You can register an attack on the board by specifying the coordinates:

receiveAttack({ x: 4, y: 7 });

If the attack misses, the missed coordinates will be updated.

Checking for Game Over

To check if a player has lost (i.e., all ships have been sunk):

if (hasLost()) {
    console.log("Game over, all ships have been sunk!");
}

API Reference

useGameBoard

This hook manages the game board's state and interactions.

• ships: A map containing all placed ships on the board.
• takenCells: A map of cells that are occupied by ships.
• missed: A map of missed attacks on the board.
• randomlyPlaceShips(): Randomly places all ships on the board.
• placeShip(params: { type: ShipType; coords: TCoords; direction: Direction }): Places a specific ship on the board.
• receiveAttack(coords: TCoords): Processes an attack at the given coordinates.
• hasLost(): Returns true if all ships have been sunk.
• resetGameBoard(): Resets the game board to its initial state.

Ship

The Ship class defines the behavior of a ship, including its position, hit detection, and sinking status.

• type: The type of the ship.
• length: The length of the ship.
• hit(): Marks the ship as hit.
• isSunk(): Checks if the ship is completely sunk.

Coords

The Coords class represents the coordinates of a cell on the game board.

• x: The x-coordinate.
• y: The y-coordinate.
• toString(): Returns the coordinates in string format (x,y).

License

MIT