map-transform/dist/transformers/merge.js

Map and transform objects with mapping definitions

import { ensureArray } from '../utils/array.js';
import { defToDataMapper } from '../utils/definitionHelpers.js';
import { isObject } from '../utils/is.js';
import { flipState } from '../utils/stateHelpers.js';
const undefinedFirst = ([_a, a], [_b, b]) => (b === undefined && a !== undefined ? 1 : a === undefined ? -1 : 0);
function mergeTransformer({ path }, flip) {
    return (options) => {
        const getFns = ensureArray(path).map((path) => defToDataMapper(path, options));
        return async function mergePipelines(data, state) {
            const values = [];
            for (const fn of getFns) {
                values.push(await fn(data, flipState(state, flip)));
            }
            return Object.fromEntries(values
                .flat()
                .filter(isObject)
                .flatMap(Object.entries)
                .sort(undefinedFirst));
        };
    };
}
export const merge = function merge(props) {
    return mergeTransformer(props, false);
};
export const mergeRev = function mergeRev(props) {
    return mergeTransformer(props, true);
};
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