Pokebag/data-sdk

// Module imports
import { promises as fs } from 'fs'
import { DATA_ROOT } from '@pokebag/pokemon-unite-data'
import merge from 'lodash-es/merge.js'
import path from 'path'





// Local imports
import { filterPatches } from '../helpers/filterPatches.js'
import { getPatches } from './getPatches.js'
import { patchReduce } from '../helpers/patchReduce.js'





/**
 * Returns the contents of a file for a particular version in the dataset.
 *
 * @memberof module:@pokebag/data-sdk
 * @param {string} file Relative path to a file inside of the dataset
 * @param {string} version The version of the dataset to use
 *
 * @returns {Promise<Object>} An array containing a compiled version of the contents of the requested directory
 */
export async function getFile(file, version = 'latest') {
    const PATCHES = await getPatches()
    const FILTERED_PATCHES = await filterPatches(PATCHES, version)

    return patchReduce(['base', ...FILTERED_PATCHES], async (accumulator, currentPatchVersion) => {
        try {
            const FILE_CONTENTS = await fs.readFile(path.resolve(DATA_ROOT, currentPatchVersion, file), 'utf8')
            return merge(accumulator, JSON.parse(FILE_CONTENTS))
        } catch(error) {
            return accumulator
        }
    }, null)
}