@viewdo/dxp-story-cli/src/commands/app/builder/services/json/merge.js

README.md

const merge = require('lodash/merge');
const jsondiffpatch = require('jsondiffpatch');
const isObject = require('lodash/isObject');
const isFunction = require('lodash/isFunction');

module.exports = (destination, source, mergeKey = "id") => {
    const mergedDiff = jsondiffpatch.create({
        objectHash: function (obj, index) {
            return obj[mergeKey];
        }
    });
    const mergeJson = (context) => {
        const { left, right } = context;
        if (typeof context.right === 'undefined') {
            context.setResult([context.left]).exit();
            return;
        }

        if (isObject(left) && isObject(right)) {
            const leftKeyProperty = left[mergeKey];
            const rightKeyProperty = right[mergeKey];
            if (leftKeyProperty && rightKeyProperty && (leftKeyProperty === rightKeyProperty)) {
                context.setResult([merge(left, right)]).exit();
            }
        }

        if(isFunction(context.left) || isFunction(context.right)){
            console.log(context);
        }
    }
   
    mergeJson.filterName = 'mergeJson'
    mergedDiff.processor.pipes.diff.before('trivial', mergeJson);

    const delta = mergedDiff.diff(destination, source);

    mergedDiff.patch(destination, delta);

    return destination;
}