'use strict';

exports = module.exports = {
    api,
    validateFormat,
};

const assert = require('node:assert'),
    BoxError = require('./boxerror.js');

function api(format) {
    assert.strictEqual(typeof format, 'string');

    switch (format) {
    case 'tgz': return require('./backupformat/tgz.js');
    case 'rsync': return require('./backupformat/rsync.js');
    }

    throw new BoxError(BoxError.INTERNAL_ERROR, `Undefined format ${format}`);
}

function validateFormat(format) {
    assert.strictEqual(typeof format, 'string');

    if (format === 'tgz' || format == 'rsync') return null;

    return new BoxError(BoxError.BAD_FIELD, 'Invalid backup format');
}