async-parallel-no-fail

gistfile1.js

'use strict';

var _ = require('underscore');
/**
    Custom implementation of Parallel:
    Async.parallel stops on the first error.

    This module captures all errors (but does not call the error callback)

    The result is that if one data request for a page fails, it does not stop
     the page rendering.

    The component that failed will just have an error property but the other
    component will continue to work.

 * @param  {Object}   gets     { homepage: function(done) { done() }}
 * @param  {Function} callback
 */
module.exports = function (gets, callback) {

    if (_.isEmpty(gets)) {
        return callback(null, gets);
    }

    var counter = 0;
    var out = {};
    var buildOutput = function (property, error, data) {
        counter++;
        if (error) {
            out[property] = { error: error };
        }else {
            out[property] = data;
        }

        if (counter === totalGets) {
            callback(null, out);
        }
    };

    for (var property in gets) {
        /* istanbul ignore next */
        if (gets.hasOwnProperty(property)) {
            var totalGets = Object.keys(gets).length;
            gets[property](buildOutput.bind(null, property));
        }
    }
};