source: trip-planner-front/node_modules/pify/index.js@ 8d391a1

'use strict';

const processFn = (fn, options) => function (...args) {
        const P = options.promiseModule;

        return new P((resolve, reject) => {
                if (options.multiArgs) {
                        args.push((...result) => {
                                if (options.errorFirst) {
                                        if (result[0]) {
                                                reject(result);
                                        } else {
                                                result.shift();
                                                resolve(result);
                                        }
                                } else {
                                        resolve(result);
                                }
                        });
                } else if (options.errorFirst) {
                        args.push((error, result) => {
                                if (error) {
                                        reject(error);
                                } else {
                                        resolve(result);
                                }
                        });
                } else {
                        args.push(resolve);
                }

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

module.exports = (input, options) => {
        options = Object.assign({
                exclude: [/.+(Sync|Stream)$/],
                errorFirst: true,
                promiseModule: Promise
        }, options);

        const objType = typeof input;
        if (!(input !== null && (objType === 'object' || objType === 'function'))) {
                throw new TypeError(`Expected \`input\` to be a \`Function\` or \`Object\`, got \`${input === null ? 'null' : objType}\``);
        }

        const filter = key => {
                const match = pattern => typeof pattern === 'string' ? key === pattern : pattern.test(key);
                return options.include ? options.include.some(match) : !options.exclude.some(match);
        };

        let ret;
        if (objType === 'function') {
                ret = function (...args) {
                        return options.excludeMain ? input(...args) : processFn(input, options).apply(this, args);
                };
        } else {
                ret = Object.create(Object.getPrototypeOf(input));
        }

        for (const key in input) { // eslint-disable-line guard-for-in
                const property = input[key];
                ret[key] = typeof property === 'function' && filter(key) ? processFn(property, options) : property;
        }

        return ret;
};