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validate min and max amounts

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This commit is contained in:
sneurlax 2023-01-26 10:46:53 -06:00
parent fa96f5ed14
commit f25392379e
1 changed files with 35 additions and 13 deletions
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48
lib/pages/buy_view/buy_form.dart
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@ -819,7 +819,7 @@ class _BuyFormState extends ConsumerState<BuyForm> {
style: STextStyles.smallMed14(context).copyWith(
color: Theme.of(context).extension<StackColors>()!.textDark,
),
key: const Key("amountInputFieldCryptoTextFieldKey"),
key: const Key("buyAmountInputFieldTextFieldKey"),
controller: _buyAmountController,
focusNode: _buyAmountFocusNode,
keyboardType: Util.isDesktop
@ -832,18 +832,8 @@ class _BuyFormState extends ConsumerState<BuyForm> {
inputFormatters: [
// regex to validate a crypto amount with 8 decimal places or
// 2 if fiat
TextInputFormatter.withFunction(
(oldValue, newValue) {
final regexString = buyWithFiat
? r'^([0-9]*[,.]?[0-9]{0,2}|[,.][0-9]{0,2})$'
: r'^([0-9]*[,.]?[0-9]{0,8}|[,.][0-9]{0,8})$';
// return RegExp(r'^([0-9]*[,.]?[0-9]{0,8}|[,.][0-9]{0,8})$')
return RegExp(regexString).hasMatch(newValue.text)
? newValue
: oldValue;
},
),
NumericalRangeFormatter(
min: minFiat, max: maxFiat, buyWithFiat: buyWithFiat)
],
decoration: InputDecoration(
contentPadding: const EdgeInsets.only(
@ -1255,3 +1245,35 @@ class _BuyFormState extends ConsumerState<BuyForm> {
);
}
}
// See https://stackoverflow.com/a/68072967
class NumericalRangeFormatter extends TextInputFormatter {
final Decimal min;
final Decimal max;
final bool buyWithFiat;
NumericalRangeFormatter(
{required this.min, required this.max, required this.buyWithFiat});
@override
TextEditingValue formatEditUpdate(
TextEditingValue oldValue,
TextEditingValue newValue,
) {
if (newValue.text == '') {
return newValue;
} else if (Decimal.parse(newValue.text) < min) {
newValue =
const TextEditingValue().copyWith(text: min.toStringAsFixed(2));
} else {
newValue = Decimal.parse(newValue.text) > max ? oldValue : newValue;
}
final regexString = buyWithFiat
? r'^([0-9]*[,.]?[0-9]{0,2}|[,.][0-9]{0,2})$'
: r'^([0-9]*[,.]?[0-9]{0,8}|[,.][0-9]{0,8})$';
// return RegExp(r'^([0-9]*[,.]?[0-9]{0,8}|[,.][0-9]{0,8})$')
return RegExp(regexString).hasMatch(newValue.text) ? newValue : oldValue;
}
}