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Handle negative numbers validations && make validations onchange #1067

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Handle negative numbers validations && make validations onchange #1067

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0773391
handle negative numbers validations && make validations onchange
AlaaElattar May 28, 2025
de6ae65
fix validations
AlaaElattar Jun 2, 2025
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41 changes: 30 additions & 11 deletions app/lib/screens/market/buy_tft.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,6 @@ class _BuyTFTWidgetState extends State<BuyTFTWidget> {

bool _validateAmount() {
final amount = amountController.text.trim();
amountError = null;

if (loadingBalance) {
setState(() {
Expand All @@ -130,22 +129,36 @@ class _BuyTFTWidgetState extends State<BuyTFTWidget> {
});
return false;
}
final balance = roundAmount(availableUSDC ?? '0');

if (balance - Decimal.parse(amount) <= Decimal.zero) {
try {
final decimalAmount = Decimal.parse(amount);

if (decimalAmount <= Decimal.zero) {
setState(() {
amountError = 'Amount must be greater than zero';
});
return false;
}

final balance = roundAmount(availableUSDC ?? '0');

if (balance - decimalAmount <= Decimal.zero) {
setState(() {
amountError = 'Balance is not enough';
});
return false;
}

setState(() {
amountError = 'Balance is not enough';
amountError = null;
});
return false;
}

if (Decimal.parse(amount) > Decimal.parse(availableUSDC ?? '0')) {
return true;
} catch (e) {
setState(() {
amountError = 'Not enough balance';
amountError = 'Invalid amount format';
});
return false;
}
return true;
}

bool _validatePrice() {
Expand Down Expand Up @@ -173,6 +186,7 @@ class _BuyTFTWidgetState extends State<BuyTFTWidget> {
(Decimal.fromInt(percentage).shift(-2));
amountController.text = roundAmount(amount.toString()).toString();
_calculateTotal();
_validateAmount();
}

void _calculateTotal() {
Expand Down Expand Up @@ -437,6 +451,9 @@ class _BuyTFTWidgetState extends State<BuyTFTWidget> {
color: Theme.of(context).colorScheme.onSurface,
),
focusNode: textFieldFocusNode,
onChanged: (_) {
_validateAmount();
},
keyboardType: const TextInputType.numberWithOptions(
decimal: true, signed: false),
controller: amountController,
Expand Down Expand Up @@ -638,7 +655,9 @@ class _BuyTFTWidgetState extends State<BuyTFTWidget> {
child: SizedBox(
width: double.infinity,
child: ElevatedButton(
onPressed: loading || loadingBalance
onPressed: loading ||
loadingBalance ||
priceError != null
? null
: () async {
if (_validateAmount() && _validatePrice()) {
Expand Down