data/src/Core/Utils/BatchUtils.ts

import { getSetting } from "@/Plugins/Core/Settings/LoadSaveSettings";

/**
 * Given a list of anything and a batch size, return a list of lists of batch
 * size.
 *
 * @param {any[]}  lst         The list to batchify
 * @param {number} numBatches  The number of batches to create. If not
 *                             specified, the number of available processors is
 *                             used.
 * @returns {any[][]} A list of batches
 */
export async function batchify<T>(
    lst: T[],
    numBatches?: number | null
): Promise<T[][]> {
    // If batchSize is not specified, use number of available processors
    if (numBatches === undefined || numBatches === null) {
        numBatches = (await getSetting("maxProcs")) as number;
    }
    const batchSize = Math.ceil(lst.length / numBatches);

    const batches: T[][] = [];
    for (let i = 0; i < lst.length; i += batchSize) {
        batches.push(lst.slice(i, i + batchSize));
    }
    return batches;
}