Added spaces to initial string for card number field

Author: wilburx9

lib/src/common/card_utils.dart

@@ -78,6 +78,7 @@ class CardUtils {
  return year;
  }
 
+ /// Removes non numerical characters from the string
  static String getCleanedNumber(String text) {
  if (text == null) {
  return '';

lib/src/common/utils.dart

@@ -51,4 +51,17 @@ class Utils {
  throw new InvalidEmailException(charge.email);
  }
  }
+
+ /// Add double spaces after every 4th character
+ static String addSpaces(String text) {
+ var buffer = new StringBuffer();
+ for (int i = 0; i < text.length; i++) {
+ buffer.write(text[i]);
+ var nonZeroIndex = i + 1;
+ if (nonZeroIndex % 4 == 0 && nonZeroIndex != text.length) {
+ buffer.write(' '); // Add double spaces.
+ }
+ }
+ return buffer.toString();
+ }
 }

lib/src/widgets/common/input_formatters.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:flutter_paystack/src/common/utils.dart';
 
 class CardMonthInputFormatter extends TextInputFormatter {
  String previousText;
@@ -42,16 +43,7 @@ class CardNumberInputFormatter extends TextInputFormatter {
  return newValue;
  }
 
- var buffer = new StringBuffer();
- for (int i = 0; i < text.length; i++) {
- buffer.write(text[i]);
- var nonZeroIndex = i + 1;
- if (nonZeroIndex % 4 == 0 && nonZeroIndex != text.length) {
- buffer.write(' '); // Add double spaces.
- }
- }
-
- var string = buffer.toString();
+ var string = Utils.addSpaces(text);
  return newValue.copyWith(
  text: string,
  selection: new TextSelection.collapsed(offset: string.length));

lib/src/widgets/input/card_input.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_paystack/src/common/card_utils.dart';
+import 'package:flutter_paystack/src/common/utils.dart';
 import 'package:flutter_paystack/src/models/card.dart';
 import 'package:flutter_paystack/src/widgets/buttons.dart';
 import 'package:flutter_paystack/src/widgets/input/cvc_field.dart';
@@ -36,8 +37,9 @@ class _CardInputState extends State<CardInput> {
  super.initState();
  numberController = new TextEditingController();
  numberController.addListener(_getCardTypeFrmNumber);
- numberController.text =
- _card != null && _card.number != null ? _card.number : null;
+ if (_card?.number != null) {
+ numberController.text = Utils.addSpaces(_card.number);
+ }
  }
 
  @override