Pokebag/data-sdk

/**
 * @callback Reducer
 * @param {*} accumulator
 * @param {string} currentPatch
 *
 * @returns {Promise|*}
 */

/**
 * Async reducer for building a dataset result for a patch.
 *
 * @param {string[]} patches Array of patches to reduce
 * @param {Reducer} reducer May be asynchronous
 * @param {*} accumulator
 *
 * @returns {Promise<*>} The compiled accumulator
 */
export async function patchReduce(patches, reducer, accumulator) {
    for (let index = 0; index < patches.length; index += 1) {
        accumulator = await reducer(accumulator, patches[index])
    }

    return accumulator
}