Upload Component AngularJs

angular.upload.js

/*=============Module================*/
import service from './upload.service';
import directive from './upload.directive';

export default angular.module('app.upload', ['app.feedback'])
	.service('uploadService', service)
    .directive('upload', directive)
    .name;

/*=============Service===============*/

var log = debug('app:service:upload');

export default class UploadService {

    constructor(restService, $q) {
		'ngInject';
        this.rest = restService;
        this.$q = $q;
    }

    upload(files) {
		var defer = this.$q.defer();
        var formData = new FormData();

        if (_.isEmpty(files)) {
            defer.resolve("");
            return defer.promise;
        }

        files.forEach(function(file) {
            formData.append('files', file);
        });

        return this.rest.init().all('upload').withHttpConfig({
            transformRequest: angular.identity
        }).customPOST(formData, null, null, {
            'Content-Type': undefined
        });
    }
}
/*=============Directive=============*/
var log = debug('app:directive:upload');
var $inject = {};

class Upload {

    constructor() {
        this.restrict = 'A';
    }

    link(scope, element, attrs) {

        element.attr('accept', 'image/jpg,image/jpeg,image/png,image/gif,image/bmp,text/plain,application/pdf,application/vnd.openxmlformats-officedocument.spreadsheetml.sheet,application/vnd.ms-excel,application/vnd.oasis.opendocument.spreadsheet,application/vnd.openxmlformats-officedocument.wordprocessingml.document,application/msword,application/vnd.oasis.opendocument.text');

        element.bind('change', () => {

            var arrayFiles = [];

            for (var i = 0; i < element[0].files.length; i++) {
                if(isAcceptedMimeType(element[0].files.item(i).type)) {
                    arrayFiles.push(element[0].files.item(i));
                } else {
                    $inject.feedbackService.addWarning('Arquivo ' + element[0].files.item(i).name + ' não é permitido!');
                }
            }

            $inject.$parse(attrs.upload).assign(scope, arrayFiles);
            scope.$apply();
        });
    }
}

function isAcceptedMimeType(mime) {
    var mapMime = {};
    mapMime["image/gif"] = true;
    mapMime["image/bmp"] = true;
    mapMime["image/png"] = true;
    mapMime["image/jpeg"] = true;
    mapMime["text/plain"] = true;
    mapMime["application/pdf"] = true;
    mapMime["application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"] = true; //xlsx
    mapMime["application/vnd.ms-excel"] = true; //xls
    mapMime["application/vnd.oasis.opendocument.spreadsheet"] = true; //ods
    mapMime["application/vnd.openxmlformats-officedocument.wordprocessingml.document"] = true; //docx
    mapMime["application/msword"] = true; //doc
    mapMime["application/vnd.oasis.opendocument.text"] = true; //odt

    return mapMime[mime] == undefined ? false : true;
}

export default function directiveFactory($parse, feedbackService) {
    'ngInject'

    $inject.$parse = $parse;
	$inject.feedbackService = feedbackService;
    return new Upload();
}