react-native-inke/index.js

react-native library for inke app

'use strict';
/*
 * @Author: Mr.Zhang 
 * @Date: 2017-09-14 09:04:08 
 */

import { DeviceEventEmitter, NativeModules, Platform } from 'react-native';
import { EventEmitter } from 'events';

let isAppRegistered = false;
const { Inke } = NativeModules;

// Event emitter to dispatch request and response from Inke.
const emitter = new EventEmitter();

DeviceEventEmitter.addListener('Inke Resp', resp => {
    emitter.emit(resp.type, resp);
});

function wrapRegisterApp(nativeFunc) {
    if (!nativeFunc) {
        return undefined;
    }
    return (...args) => {
        if (isAppRegistered) {
            return Promise.resolve(true);
        }
        isAppRegistered = true;
        return new Promise((resolve, reject) => {
            nativeFunc.apply(null, [
                ...args,
                (error, result) => {
                    if (!error) {
                        return resolve(result);
                    }
                    if (typeof error === 'string') {
                        return reject(new Error(error));
                    }
                    reject(error);
                },
            ]);
        });
    }
}

function wrapApi(nativeFunc) {
    if (!nativeFunc) {
        return undefined;
    }
    return (...args) => {
        if (!isAppRegistered) {
            return Promise.reject(new Error('registerApp required.'));
        }
        return new Promise((resolve, reject) => {
            nativeFunc.apply(null, [
                ...args,
                (error, result) => {
                    if (!error) {
                        return resolve(result);
                    }
                    if (typeof error === 'string') {
                        return reject(new Error(error));
                    }
                    reject(error);
                },
            ]);
        });
    }
}

/**
 * `addListener` inherits from `events` module
 * @method addListener
 * @param {String} eventName - the event name
 * @param {Function} trigger - the function when event is fired
 */
export const addListener = emitter.addListener.bind(emitter);

/**
 * `once` inherits from `events` module
 * @method once
 * @param {String} eventName - the event name
 * @param {Function} trigger - the function when event is fired
 */
export const once = emitter.once.bind(emitter);

/**
 * `removeAllListeners` inherits from `events` module
 * @method removeAllListeners
 * @param {String} eventName - the event name
 */
export const removeAllListeners = emitter.removeAllListeners.bind(emitter);

/**
 * @method registerApp
 * @param {String} appId - the app id
 * @return {Promise}
 */
export const registerApp = wrapRegisterApp(Inke.registerApp);

/**
 * Return if the inke app is installed in the device.
 * @method isInkeAppInstalled
 * @return {Promise}
 */
export const isInkeAppInstalled = wrapApi(Inke.isInkeAppInstalled);