AdventOfCode-js-2024/common.js

import fs from "node:fs";

/**
 * Load the input for a day's challenge
 *
 * @param {string|number} dayNumber The number of the day to load. A string for a file path can be provided here too.
 * @param {Function} parsingFunction A function to parse the input to a usable format
 * @param {boolean} literalPath If true, the {@link dayNumber} value should be used as a file path
 *
 * @returns {unknown}
 */
export function loadInput(dayNumber, parsingFunction, literalPath = false) {
    let filePath = literalPath ? dayNumber : `./inputs/day_${dayNumber}.input`;
    const data = fs.readFileSync(filePath, "utf8");

    return typeof parsingFunction == "function" ? parsingFunction(data) : data;
}