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create exchange rate cacl tool

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Yasien Mac Mini
2025-06-11 18:29:02 +02:00
parent a4f2f693d2
commit 73ff46faa7
1 changed files with 301 additions and 0 deletions
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Frontend/lib/mih_packages/calculator/package_tools/currency_exchange_rate.dart Normal file
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import 'package:flutter/material.dart';
import 'package:mzansi_innovation_hub/main.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_button.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_dropdwn_field.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_form.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_package_tool_body.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_package_window.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_single_child_scroll.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_package_components/mih_text_form_field.dart';
import 'package:mzansi_innovation_hub/mih_components/mih_pop_up_messages/mih_loading_circle.dart';
import 'package:mzansi_innovation_hub/mih_services/mih_alert_services.dart';
import 'package:mzansi_innovation_hub/mih_services/mih_currency_exchange_rate_services.dart';
import 'package:mzansi_innovation_hub/mih_services/mih_validation_services.dart';
class CurrencyExchangeRate extends StatefulWidget {
const CurrencyExchangeRate({super.key});
@override
State<CurrencyExchangeRate> createState() => _CurrencyExchangeRateState();
}
class _CurrencyExchangeRateState extends State<CurrencyExchangeRate> {
final _formKey = GlobalKey<FormState>();
final TextEditingController _fromCurrencyController = TextEditingController();
final TextEditingController _toCurrencyController = TextEditingController();
final TextEditingController _fromAmountController = TextEditingController();
final TextEditingController _toAmountController = TextEditingController();
late Future<List<String>> availableCurrencies;
Future<void> submitForm() async {
String fromCurrencyCode = _fromCurrencyController.text.split(" - ")[0];
String toCurrencyCode = _toCurrencyController.text.split(" - ")[0];
double exchangeRate = 0;
await MihCurrencyExchangeRateServices.getCurrencyExchangeValue(
fromCurrencyCode, toCurrencyCode)
.then((amount) {
exchangeRate = amount;
});
double exchangeValue =
double.parse(_fromAmountController.text) * exchangeRate;
print(
"${_fromAmountController.text} | $fromCurrencyCode\n$exchangeValue | $toCurrencyCode");
displayResult(_fromAmountController.text, fromCurrencyCode, exchangeValue,
toCurrencyCode);
}
void clearInput() {
_fromCurrencyController.clear();
_fromAmountController.clear();
_toCurrencyController.clear();
_toAmountController.clear();
}
void displayResult(String amount, String fromCurrencyCode,
double exchangeValue, String toCurrencyCode) {
showDialog(
context: context,
barrierDismissible: false,
builder: (context) => MihPackageWindow(
fullscreen: false,
windowTitle: "Calculation Results",
onWindowTapClose: () {
Navigator.pop(context);
},
windowBody: Column(
children: [
Icon(
Icons.currency_exchange,
size: 150,
color: MzanziInnovationHub.of(context)!.theme.secondaryColor(),
),
const SizedBox(height: 20),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Expanded(
child: Text(
amount,
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 30,
fontWeight: FontWeight.bold,
color: MzanziInnovationHub.of(context)!
.theme
.secondaryColor(),
),
),
),
const SizedBox(width: 10),
Expanded(
child: Text(
fromCurrencyCode.toUpperCase(),
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 30,
fontWeight: FontWeight.bold,
color: MzanziInnovationHub.of(context)!
.theme
.secondaryColor(),
),
),
),
],
),
const Divider(),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
Expanded(
child: Text(
exchangeValue.toStringAsFixed(2),
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 30,
fontWeight: FontWeight.bold,
color: MzanziInnovationHub.of(context)!
.theme
.secondaryColor(),
),
),
),
const SizedBox(width: 10),
Expanded(
child: Text(
toCurrencyCode.toUpperCase(),
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 30,
fontWeight: FontWeight.bold,
color: MzanziInnovationHub.of(context)!
.theme
.secondaryColor(),
),
),
),
],
),
],
),
),
);
}
@override
void dispose() {
super.dispose();
_fromCurrencyController.dispose();
_fromAmountController.dispose();
_toCurrencyController.dispose();
_toAmountController.dispose();
}
@override
void initState() {
super.initState();
availableCurrencies = MihCurrencyExchangeRateServices.getCurrencyCodeList();
}
@override
Widget build(BuildContext context) {
double screenWidth = MediaQuery.of(context).size.width;
return MihPackageToolBody(
borderOn: false,
innerHorizontalPadding: 10,
bodyItem: getBody(screenWidth),
);
}
Widget getBody(double width) {
return FutureBuilder(
future: availableCurrencies,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.waiting) {
return const Mihloadingcircle();
} else if (snapshot.connectionState == ConnectionState.done) {
return MihSingleChildScroll(
child: Padding(
padding: MzanziInnovationHub.of(context)!.theme.screenType ==
"desktop"
? EdgeInsets.symmetric(horizontal: width * 0.2)
: EdgeInsets.symmetric(horizontal: width * 0.075),
child: Column(
children: [
MihForm(
formKey: _formKey,
formFields: <Widget>[
MihTextFormField(
fillColor: MzanziInnovationHub.of(context)!
.theme
.secondaryColor(),
inputColor: MzanziInnovationHub.of(context)!
.theme
.primaryColor(),
controller: _fromAmountController,
multiLineInput: false,
requiredText: true,
hintText: "Currency Amount",
numberMode: true,
validator: (value) {
return MihValidationServices().isEmpty(value);
},
),
const SizedBox(height: 10),
MihDropdownField(
controller: _fromCurrencyController,
hintText: "From",
dropdownOptions: snapshot.data!,
editable: true,
enableSearch: true,
validator: (value) {
return MihValidationServices().isEmpty(value);
},
requiredText: true,
),
const SizedBox(height: 10),
MihDropdownField(
controller: _toCurrencyController,
hintText: "To",
dropdownOptions: snapshot.data!,
editable: true,
enableSearch: true,
validator: (value) {
return MihValidationServices().isEmpty(value);
},
requiredText: true,
),
const SizedBox(height: 25),
Center(
child: Wrap(
spacing: 10,
runSpacing: 10,
children: [
MihButton(
onPressed: () {
if (_formKey.currentState!.validate()) {
submitForm();
FocusScope.of(context)
.requestFocus(FocusNode());
} else {
MihAlertServices()
.formNotFilledCompletely(context);
}
},
buttonColor: MzanziInnovationHub.of(context)!
.theme
.successColor(),
width: 300,
child: Text(
"Calculate",
style: TextStyle(
color: MzanziInnovationHub.of(context)!
.theme
.primaryColor(),
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
),
MihButton(
onPressed: () {
clearInput();
},
buttonColor: MzanziInnovationHub.of(context)!
.theme
.errorColor(),
width: 300,
child: Text(
"Clear",
style: TextStyle(
color: MzanziInnovationHub.of(context)!
.theme
.primaryColor(),
fontSize: 20,
fontWeight: FontWeight.bold,
),
),
),
],
),
),
],
),
],
),
),
);
} else {
return Center(
child: Text(
"Error pulling Currency Exchange Data.",
style: TextStyle(
fontSize: 25,
color: MzanziInnovationHub.of(context)!.theme.errorColor()),
textAlign: TextAlign.center,
),
);
}
});
}
}