FileReader HTML5 AngularJS

FileReader.js

xComponent.factory("fileReader", ["$q", "$log", function ($q, $log) {
    var onLoad = function (reader, deferred, scope) {
        return function () {
            scope.$apply(function () {
                deferred.resolve(reader.result);
            });
        };
    };

    var onError = function (reader, deferred, scope) {
        return function () {
            scope.$apply(function () {
                deferred.reject(reader.result);
            });
        };
    };

    var onProgress = function (reader, scope) {
        return function (event) {
            scope.$broadcast("fileProgress",
                {
                    total: event.total,
                    loaded: event.loaded
                });
        };
    };

    var getReader = function (deferred, scope) {
        var reader = new FileReader();
        reader.onload = onLoad(reader, deferred, scope);
        reader.onerror = onError(reader, deferred, scope);
        reader.onprogress = onProgress(reader, scope);
        return reader;
    };

    var readAsDataURL = function (file, scope) {
        var deferred = $q.defer();
        var reader = getReader(deferred, scope);
        reader.readAsDataURL(file);
        return deferred.promise;
    };
    var isTypeValid = function (validMimeTypes, type) {
        return ((validMimeTypes === (void 0) || validMimeTypes === '') || validMimeTypes.indexOf(type) > -1) && type !== null && type !== undefined && type !== '';
    };
    var readMultiFileAsDataUrl = function (files, scope, validMimeTypes) {
        var deferred = $q.defer();
        var promises = [];
        for (var i = 0; i < files.length; i++) {
            if (isTypeValid(validMimeTypes, files[i].type)) {
                promises.push(readAsDataURL(files[i], scope));
            }else{
                console.log('Your file type : '+ files[i].type+ ' is not valid.');
            }


        }
        $q.all(promises).then(function (result) {
            deferred.resolve(result);
        });
        return deferred.promise;
    };
    return{
        readAsDataURL: readAsDataURL,
        readMultiFileAsDataUrl: readMultiFileAsDataUrl,
        isTypeValid: isTypeValid
    };
}]);

This is FileReader HTML5 AngularJS