@bea.steers/node-red-contrib-nuclio/lib/util.js

Deploy Nuclio functions from Node-RED

const _ = require('lodash');


function diff(a,b) {
    var r = {};
    _.each(a, function(v,k) {
        if(b?.[k] === v) return;
        let v2 = _.isObject(v) ? diff(v, b?.[k]) : v;
        if(_.isObject(v2) && _.isEmpty(v2)) return;
        if(_.isEmpty(v) && _.isEmpty(b?.[k])) return;
        r[k] = v2;
    });
    return r;
}

function merge(...args) {
    return _.mergeWith(...args, function(a, b) {
        if (_.isArray(b)) {
            return b;
        }
    });
}



function debounced(fn, delay, maxWait) {
    let timeout = null;
    let lastCall = null;
    let maxTimeout = null;

    return function debounced(...args) {
        const now = Date.now();

        if (!lastCall) lastCall = now;

        clearTimeout(timeout);
        timeout = setTimeout(() => {
            fn.apply(this, args);
            lastCall = null;
            clearTimeout(maxTimeout);
            maxTimeout = null;
        }, delay);

        if (!maxTimeout) {
            maxTimeout = setTimeout(() => {
                fn.apply(this, args);
                lastCall = null;
                clearTimeout(timeout);
                timeout = null;
            }, maxWait);
        }
    };
}



module.exports = {
    diff, merge,
    debounced,
};