If on Mac:
another_quickbooks is a Flutter package for the QuickBooks REST APIs.
Supports all Flutter supported platforms:
Install another_quickbooks
flutter pub add another_quickbooks
Bonus: QuickBooks uses OAth2 but during development you can obtain all the tokens by using https://developer.intuit.com/app/developer/playground to generate them
With your developer account information at hand we can now move on to configuring the QuickBooks client and be able to make requests to the QuickBooks APIs.
final String applicationId = "b790c7c7-28bb-4614-898d-d4587";
final String clientId = "ABNIuyQM0oAR68j9E4qFlXa1wECY4TDah7H7w3urknpWDlgYKA";
final String clientSecret = "iZU1Dyqh2TNz0Rp01z83SJ4n6XggN2nTGZNHU3AC";
// Configured in Quickbooks Dashboard.
final String redirectUrl =
"https://developer.intuit.com/v2/OAuth2Playground/RedirectUrl";
quickClient = QuickbooksClient(
applicationId: applicationId,
clientId: clientId,
clientSecret: clientSecret,
environmentType: EnvironmentType.Sandbox);
await quickClient!.initialize();
Once the client is configured we can obtain the auth URL to authenticate the app with our QuickBooks account.
authUrl = quickClient!.getAuthorizationPageUrl(
scopes: [Scope.Payments, Scope.Accounting],
redirectUrl: redirectUrl,
state: "state123");
When we complete the OAth2 flow we can then use the client to get the authorization token as follows:
Future<void> requestAccessToken(String code, String realmId) async {
this.realmId = realmId;
token = await quickClient!.getAuthToken(code: code,
redirectUrl: redirectUrl,
realmId: realmId);
setState(() {
});
}
With the client configured and the app authorized we can proceed to make requests to the QuickBooks APIs. In this example we'll request a specific invoice to be returned as a PDF which will then print on a Brother printer.
//////////////////////////////////////////////////
/// Fetch invoice PDF for Invoice ID: 130
//////////////////////////////////////////////////
Uint8List pdfBytes = await quickClient!
.getAccountingClient()
.getInvoicePdf(realmId: realmId, invoiceId: "130");
//////////////////////////////////////////////////
/// Save PDF to temp memory
/// The library another_brother requires a PDF
/// file so we need to save the bytes of the PDF
/// file obtained through another_quickbooks
//////////////////////////////////////////////////
final directory = await getApplicationDocumentsDirectory();
final path = directory.path;
File invoiceFile = File('$path/invoice.pdf');
invoiceFile.writeAsBytesSync(pdfBytes);
In order to print we'll first need to define what printer we are going to print on, what label (or paper) the printer has and what channel of communication we'll use to send the print request to the printer.
The another_brother plugin allows for a large level of detail when specifing your print. In this section however we'll just present the most basic setup to get you printing.
The snippet below shows how to print to a 1110NWB printer with a W103 label (103mm wide) talking over Bluetooth Classic.
var printer = new Printer();
var printInfo = PrinterInfo();
printInfo.printerModel = Model.QL_1110NWB;
printInfo.printMode = PrintMode.FIT_TO_PAGE;
printInfo.isAutoCut = true;
printInfo.port = Port.BLUETOOTH;
// Set the label type.
printInfo.labelNameIndex = QL1100.ordinalFromID(QL1100.W103.getId());
// Set the printer info so we can use the SDK to get the printers.
await printer.setPrinterInfo(printInfo);
With the printer configured we then need to find a specific printer to connect to by looking for a list of printers bonded to the device. In this example we are connecting over Bluetooth but similar methods exist WiFi.
List<BluetoothPrinter> printers = await printer.getBluetoothPrinters([Model.QL_1110NWB.getName()]);
Since at this point we are not interested in any specific printer we'll just grab the first one and print to it.
printInfo.macAddress = printers.single.macAddress;
printer.setPrinterInfo(printInfo);
And last but not least we'll print an image from our assets folder.
With the printer configured and the invoice stored all that remains is to send the file to the Brother printer for printing.
// Print Invoice
printer.printPdfFile(invoiceFile.path, 1);