source: trip-planner-front/node_modules/pify/index.js@ 6c1585f

'use strict';

var processFn = function (fn, P, opts) {
        return function () {
                var that = this;
                var args = new Array(arguments.length);

                for (var i = 0; i < arguments.length; i++) {
                        args[i] = arguments[i];
                }

                return new P(function (resolve, reject) {
                        args.push(function (err, result) {
                                if (err) {
                                        reject(err);
                                } else if (opts.multiArgs) {
                                        var results = new Array(arguments.length - 1);

                                        for (var i = 1; i < arguments.length; i++) {
                                                results[i - 1] = arguments[i];
                                        }

                                        resolve(results);
                                } else {
                                        resolve(result);
                                }
                        });

                        fn.apply(that, args);
                });
        };
};

var pify = module.exports = function (obj, P, opts) {
        if (typeof P !== 'function') {
                opts = P;
                P = Promise;
        }

        opts = opts || {};
        opts.exclude = opts.exclude || [/.+Sync$/];

        var filter = function (key) {
                var match = function (pattern) {
                        return typeof pattern === 'string' ? key === pattern : pattern.test(key);
                };

                return opts.include ? opts.include.some(match) : !opts.exclude.some(match);
        };

        var ret = typeof obj === 'function' ? function () {
                if (opts.excludeMain) {
                        return obj.apply(this, arguments);
                }

                return processFn(obj, P, opts).apply(this, arguments);
        } : {};

        return Object.keys(obj).reduce(function (ret, key) {
                var x = obj[key];

                ret[key] = typeof x === 'function' && filter(key) ? processFn(x, P, opts) : x;

                return ret;
        }, ret);
};

pify.all = pify;