@nichathan-gaming/map-generator/mapGenerator/helpers/getConnectedIndexes.js

Creates and generates a 2 dimensional array with various path generation functions.

import mapGenerator from "../mapGenerator.js";
import shuffle from "./shuffle.js";
import assertIndex from "./assertIndex.js";
import { assertInstanceOf } from "@nichathan-gaming/assertions";

/**
 * Gets new indexes based on the given index. 
 * [index[0] + 1, index[1]],
 * [index[0] - 1, index[1]],
 * [index[0], index[1] + 1],
 * [index[0], index[1] - 1]
 * @param {mapGenerator} map The current game map element
 * @param {[number, number]} searchIndex The index to use for new indexes
 * @returns {[number, number][]} A shuffled array of new indexes
 */
const getConnectedIndexes = (map, searchIndex) => {
    assertInstanceOf(map, mapGenerator);
    assertIndex(searchIndex);

    const shuffledIndexes = shuffle([
        [searchIndex[0] + 1, searchIndex[1]],
        [searchIndex[0] - 1, searchIndex[1]],
        [searchIndex[0], searchIndex[1] + 1],
        [searchIndex[0], searchIndex[1] - 1],
    ]);

    return shuffledIndexes.filter(el => map.isValidIndex(el));
};

export default getConnectedIndexes;