Save List-item with Attachment- AngularJs/Sharepoint 2013

<input id="fileinput" type="file">

<input ng-click="saveAttachments($event)">

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 var maxFileSize = 5000000; //Set maximum file size value into a variable. 5 MB in bytes

    var fileName = []; // To keep track of uploaded file names

    var fileData = []; // Create an array to hold all the files

    var fileCount = 0; // To keep track on number of files uploaded into an array

    $scope.saveAttachments = function ($event) {

        //if (document.getElementById("fileinput").files.length === 0) {

        //    alert("Select a file!");

        //    return;

        //}

     

        //Getting the Target file

        var files = document.getElementById("fileinput").files;

        var file = files[0];

        if (files && file) {

            //Creating FileReader obj to read the uploaded file

            var reader = new FileReader();

            //Getting the File name

            fileName[fileCount] = file.name;

            reader.filename = file.name;

            //Getting the extention of the file

            var ext = file.name.match(/\.([^\.]+)$/)[1];

            //Getting the file size

            var fileSize = file.size;

            if (fileSize > maxFileSize)

                ext = 'sizeExceed';

            //var fileID = $(this).attr('id');

            //This is where the uploaded file will be read by

            reader.onload = function () {

                //Validating the uploaded file Format

                switch (ext) {

                    case 'jpg':

                    case 'png':

                    case 'pdf':

                    case 'jpeg':

                    case 'docx':

                    case 'doc':

                    case 'excel':

                    case 'xlsm':

                    case 'xls':

                    case 'xlsx':

                    case 'ods':

                    case 'zip':

                    case 'rar':

                        //Put the file data into an array

                        fileData[fileCount] = this.result;

                        var n = fileData[fileCount].indexOf(";base64,") + 8;

                        //To Get the base64 bytes, remove the first part of the dataurl and //this we need to feed to SharePoint

                        fileData[fileCount] = fileData[fileCount].substring(n);

                        fileCount++;

                        break;

                    case 'sizeExceed':

                        fileData[fileCount] = '';

                        fileName[fileCount] = '';

                        alert('File size exceeded');

                        break;

                    default:

                        fileData[fileCount] = '';

                        fileName[fileCount] = '';

                        alert('Invalid format');

                }

                var site = _spPageContextInfo.webAbsoluteUrl;

                $().SPServices({

                    operation: 'UpdateListItems',

                    async: false,

                    listName: 'ListName',

                    batchCmd: 'New',

                    webURL: site,

                    valuepairs: [[Column1, $scope.val], ["Column2", $scope.val1], ["Column3", $scope.val2],["Column4",$scope.val4]], 

                    completefunc: function (xData, Status) {

                        if (Status == 'success' && $(xData.responseXML).find('ErrorCode').text() == '0x00000000') {

                            currentitem = $(xData.responseXML).SPFilterNode("z:row").attr("ows_ID");

                             if (file) {

                                getFileBuffer(file).then(function (buffer) {

                                    var bytes = new Uint8Array(buffer);

                                    var content = new SP.Base64EncodedByteArray(); //base64 encoding

                                    for (var b = 0; b < bytes.length; b++) {

                                        content.append(bytes[b]);

                                    }

                                    $().SPServices({

                                        operation: "AddAttachment",

                                        listName: "'ListName'",

                                        listItemID: currentitem,

                                        fileName: file.name,

                                        webURL:site,

                                        attachment: content.toBase64String(),

                                        async: false,

                                        completefunc: function (xData, Status) {

                                            alert('file uploaded')

                                        }

                                    });

                                });

                             }

                            //alert('List item created with ID ' + currentitem);                          

                        } else alert('List item creation failed');

                    }

                });

           

            };

            reader.onabort = function () {

                alert("The upload was aborted.");

            };

            reader.onerror = function () {

                alert("An error occured while reading the file.");

            };

            reader.readAsDataURL(file);

        }

    }

    var getFileBuffer = function (file) {

        var deferred = $.Deferred();

        var reader = new FileReader();

        reader.onload = function (e) {

            deferred.resolve(e.target.result);

        }

        reader.onerror = function (e) {

            deferred.reject(e.target.error);

        }

        reader.readAsArrayBuffer(file);

        return deferred.promise();

    };