import React, { Component } from 'react';

import {
  StyleSheet,
  Component,
  View,
  DeviceEventEmitter,
} from 'react-native';

var RNUploader = NativeModules.RNUploader;

componentDidMount() {
	// upload progress
	DeviceEventEmitter.addListener('RNUploaderProgress', (data)=>{
	  let bytesWritten = data.totalBytesWritten;
	  let bytesTotal   = data.totalBytesExpectedToWrite;
	  let progress     = data.progress;
	  
	  console.log( "upload progress: " + progress + "%");
	});
}

doUpload() {
	let files = [
		{
			name: 'file[]',
			filename: 'image1.png',
			filepath: 'assets-library://....',  // image from camera roll/assets library
			filetype: 'image/png',
		},
		{
			name: 'file[]',
			filename: 'image2.gif',
			filepath: "data:image/gif;base64,R0lGODlhEAAQAMQAAORHHOVSKudfOulrSOp3WOyDZu6QdvCchPGolfO0o/XBs/fNwfjZ0frl3/zy7////wAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAkAABAALAAAAAAQABAAAAVVICSOZGlCQAosJ6mu7fiyZeKqNKToQGDsM8hBADgUXoGAiqhSvp5QAnQKGIgUhwFUYLCVDFCrKUE1lBavAViFIDlTImbKC5Gm2hB0SlBCBMQiB0UjIQA7",
			filetype: 'image/gif',
		},
	];

	let opts = {
		url: 'http://my.server/api/upload',
		files: files, 
		method: 'POST',                             // optional: POST or PUT
		headers: { 'Accept': 'application/json' },  // optional
		params: { 'user_id': 1 },                   // optional
	};

	RNUploader.upload( opts, (err, response) => {
		if( err ){
			console.log(err);
			return;
		}
  
		let status = response.status;
		let responseString = response.data;
		let json = JSON.parse( responseString );

		console.log('upload complete with status ' + status);
	});
}