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eko54r
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468
lib/Screens/invoice return/invoice_return_screen.dart Normal file
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:intl/intl.dart';
import 'package:nb_utils/nb_utils.dart';
import 'package:mobile_pos/Screens/Purchase/Model/purchase_transaction_model.dart';
import 'package:mobile_pos/Screens/invoice%20return/repo/invoice_return_repo.dart';
import 'package:mobile_pos/generated/l10n.dart' as lang;
import '../../GlobalComponents/glonal_popup.dart';
import '../../constant.dart';
import '../../currency.dart';
import '../../model/add_to_cart_model.dart';
import '../../model/sale_transaction_model.dart';
import '../../service/check_user_role_permission_provider.dart';
import '../../widgets/multipal payment mathods/multi_payment_widget.dart';
class InvoiceReturnScreen extends StatefulWidget {
const InvoiceReturnScreen({super.key, this.saleTransactionModel, this.purchaseTransaction});
final SalesTransactionModel? saleTransactionModel;
final PurchaseTransaction? purchaseTransaction;
@override
State<InvoiceReturnScreen> createState() => _InvoiceReturnScreenState();
}
class _InvoiceReturnScreenState extends State<InvoiceReturnScreen> {
final GlobalKey<MultiPaymentWidgetState> _paymentKey = GlobalKey<MultiPaymentWidgetState>();
final TextEditingController _totalReturnAmountController = TextEditingController();
List<SaleCartModel> returnList = [];
List<TextEditingController> controllers = [];
List<FocusNode> focus = [];
// Helper to check context
bool get isSale => widget.saleTransactionModel != null;
@override
void initState() {
super.initState();
_initializeData();
}
void _initializeData() {
if (isSale && widget.saleTransactionModel?.salesDetails != null) {
for (var element in widget.saleTransactionModel!.salesDetails!) {
// Sales Calculation Logic
num unitPrice = calculateDiscountForEachProduct(
productPrice: (element.price ?? 0) - (element.discount ?? 0),
quantity: (element.quantities ?? 0),
totalDiscount:
(widget.saleTransactionModel?.discountAmount ?? 0) - (widget.saleTransactionModel?.roundingAmount ?? 0),
totalPrice:
((widget.saleTransactionModel?.totalAmount ?? 0) + (widget.saleTransactionModel?.discountAmount ?? 0)) -
((widget.saleTransactionModel?.vatAmount ?? 0) + (widget.saleTransactionModel?.shippingCharge ?? 0)),
);
_addItemToList(element.product?.productName, element.stock?.batchNo, element.stock?.id, unitPrice, element.id,
element.product?.id, element.quantities, element.lossProfit);
}
} else if (!isSale && widget.purchaseTransaction?.details != null) {
for (var element in widget.purchaseTransaction!.details!) {
// Purchase Calculation Logic
num unitPrice = calculateDiscountForEachProduct(
productPrice: (element.productPurchasePrice ?? 0),
quantity: (element.quantities ?? 0),
totalDiscount: (widget.purchaseTransaction?.discountAmount ?? 0),
totalPrice:
((widget.purchaseTransaction?.totalAmount ?? 0) + (widget.purchaseTransaction?.discountAmount ?? 0)) -
((widget.purchaseTransaction?.vatAmount ?? 0) + (widget.purchaseTransaction?.shippingCharge ?? 0)),
);
_addItemToList(element.product?.productName, element.stock?.batchNo, element.stock?.id, unitPrice, element.id,
element.product?.id, element.quantities, 0);
}
}
_updateTotalController();
}
void _addItemToList(String? name, String? batch, num? stockId, num unitPrice, num? detailId, num? productId,
num? stockQty, num? lossProfit) {
returnList.add(SaleCartModel(
productName: name,
batchName: batch ?? '',
stockId: stockId ?? 0,
unitPrice: unitPrice,
productId: detailId ?? 0,
quantity: 0,
productCode: productId.toString(),
stock: stockQty ?? 0,
lossProfit: lossProfit,
));
controllers.add(TextEditingController());
focus.add(FocusNode());
}
void _updateTotalController() {
_totalReturnAmountController.text = getTotalReturnAmount().toStringAsFixed(2);
}
num calculateDiscountForEachProduct(
{required num totalDiscount, required num productPrice, required num totalPrice, required num quantity}) {
if (totalPrice == 0) return productPrice;
num thisProductDiscount = (totalDiscount * (productPrice * quantity)) / totalPrice;
return productPrice - (thisProductDiscount / (quantity == 0 ? 1 : quantity));
}
num getTotalReturnAmount() {
num returnAmount = 0;
for (var element in returnList) {
if (element.quantity > 0) {
returnAmount += element.quantity * (num.tryParse(element.unitPrice.toString()) ?? 0);
}
}
return returnAmount;
}
/// ___________________ MAIN SUBMISSION LOGIC ___________________
Future<void> _submitReturn(WidgetRef ref, PermissionService permissionService, BuildContext context) async {
EasyLoading.show();
// 1. Filter Items
final validReturnItems = returnList.where((element) => element.quantity > 0).toList();
if (validReturnItems.isEmpty) {
EasyLoading.dismiss();
EasyLoading.showError(lang.S.of(context).pleaseSelectForProductReturn);
return;
}
// 2. Permission Check
String requiredPermission = isSale ? Permit.saleReturnsCreate.value : Permit.purchaseReturnsCreate.value;
if (!permissionService.hasPermission(requiredPermission)) {
EasyLoading.dismiss();
ScaffoldMessenger.of(context)
.showSnackBar(SnackBar(backgroundColor: Colors.red, content: Text(lang.S.of(context).permissionDenied)));
return;
}
try {
// 4. Create Model
ReturnDataModel data = ReturnDataModel(
saleId: isSale ? widget.saleTransactionModel?.id.toString() : widget.purchaseTransaction?.id.toString(),
returnQty: [],
payments: []);
for (var item in validReturnItems) {
data.returnQty.add(item.quantity);
}
List<PaymentEntry> payments = _paymentKey.currentState?.getPaymentEntries() ?? [];
data.payments = payments.map((e) => e.toJson()).toList();
// 6. Call API
InvoiceReturnRepo repo = InvoiceReturnRepo();
bool? result;
if (isSale) {
result = await repo.createSalesReturn(ref: ref, context: context, salesReturn: data);
} else {
result = await repo.createPurchaseReturn(ref: ref, context: context, returnData: data);
}
EasyLoading.dismiss();
if (result ?? false) {
if (mounted) Navigator.pop(context);
} else {
EasyLoading.showError(lang.S.of(context).failedToProcessReturn);
}
} catch (e) {
EasyLoading.dismiss();
ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(e.toString())));
}
}
@override
Widget build(BuildContext context) {
final theme = Theme.of(context);
final _lang = lang.S.of(context);
// Unified Data Getters
final invoiceNumber =
isSale ? widget.saleTransactionModel!.invoiceNumber : widget.purchaseTransaction!.invoiceNumber;
final dateString = isSale ? widget.saleTransactionModel!.saleDate! : widget.purchaseTransaction!.purchaseDate!;
final partyName = isSale ? widget.saleTransactionModel!.party?.name : widget.purchaseTransaction!.user?.name;
final vatAmount = isSale
? ((widget.saleTransactionModel?.vatAmount ?? 0) + (widget.saleTransactionModel?.shippingCharge ?? 0))
: ((widget.purchaseTransaction?.vatAmount ?? 0) + (widget.purchaseTransaction?.shippingCharge ?? 0));
return Consumer(builder: (context, consumerRef, __) {
final permissionService = PermissionService(consumerRef);
return GlobalPopup(
child: Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
backgroundColor: Colors.white,
title: Text(isSale ? _lang.salesReturn : _lang.purchaseReturn),
centerTitle: true,
elevation: 0.0,
),
body: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(20.0),
child: Column(
children: [
// Invoice Header Info
Row(
children: [
Expanded(
child: AppTextField(
textFieldType: TextFieldType.NAME,
readOnly: true,
initialValue: invoiceNumber,
decoration: InputDecoration(
labelText: _lang.invoiceNumber,
border: OutlineInputBorder(),
floatingLabelBehavior: FloatingLabelBehavior.always),
),
),
const SizedBox(width: 20),
Expanded(
child: AppTextField(
textFieldType: TextFieldType.NAME,
readOnly: true,
initialValue: DateFormat.yMMMd().format(DateTime.parse(dateString)),
decoration: InputDecoration(
labelText: lang.S.of(context).date,
border: const OutlineInputBorder(),
floatingLabelBehavior: FloatingLabelBehavior.always),
),
),
],
),
const SizedBox(height: 30),
AppTextField(
textFieldType: TextFieldType.NAME,
readOnly: true,
initialValue: partyName,
decoration: InputDecoration(
labelText: lang.S.of(context).customerName,
border: const OutlineInputBorder(),
floatingLabelBehavior: FloatingLabelBehavior.always),
),
const SizedBox(height: 20),
// Return Items List
Container(
decoration: BoxDecoration(
borderRadius: const BorderRadius.all(Radius.circular(5)),
color: theme.colorScheme.primaryContainer,
boxShadow: [
BoxShadow(
color: const Color(0xff000000).withValues(alpha: 0.08),
spreadRadius: 0,
offset: const Offset(0, 4),
blurRadius: 24)
],
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Container(
width: double.infinity,
decoration: const BoxDecoration(
color: Color(0xffFEF0F1),
borderRadius: BorderRadius.only(topLeft: Radius.circular(5), topRight: Radius.circular(5)),
),
child: Padding(
padding: const EdgeInsets.all(10),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(lang.S.of(context).itemAdded, style: const TextStyle(fontSize: 16)),
Text(lang.S.of(context).quantity, style: const TextStyle(fontSize: 16)),
],
),
),
),
ListView.builder(
shrinkWrap: true,
physics: const NeverScrollableScrollPhysics(),
itemCount: returnList.length,
itemBuilder: (context, index) {
focus[index].addListener(() {
if (!focus[index].hasFocus) setState(() {});
});
return Padding(
padding: const EdgeInsets.symmetric(horizontal: 10),
child: ListTile(
contentPadding: EdgeInsets.zero,
title: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Flexible(
child: Text(returnList[index].productName.toString(),
maxLines: 2, overflow: TextOverflow.ellipsis)),
Text(_lang.returnQuantity),
],
),
subtitle: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'${formatPointNumber((returnList[index].stock ?? 0) - returnList[index].quantity)} X ${formatPointNumber(returnList[index].unitPrice ?? 0)}'),
SizedBox(
width: 100,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
_buildQtyBtn(Icons.remove, () {
setState(() {
if (returnList[index].quantity > 0) {
returnList[index].quantity--;
controllers[index].text = returnList[index].quantity.toString();
_updateTotalController();
}
});
}),
SizedBox(
width: 50,
child: TextFormField(
controller: controllers[index],
focusNode: focus[index],
textAlign: TextAlign.center,
keyboardType: TextInputType.number,
inputFormatters: [
FilteringTextInputFormatter.allow(RegExp(r'^\d*\.?\d{0,2}'))
],
onChanged: (value) {
num stock = returnList[index].stock ?? 1;
num newVal = num.tryParse(value) ?? 0;
if (newVal <= stock) {
returnList[index].quantity = newVal;
_updateTotalController();
} else {
controllers[index].text = '0';
EasyLoading.showError(lang.S.of(context).outOfStock);
}
},
decoration: InputDecoration(
border: InputBorder.none,
hintText: focus[index].hasFocus
? null
: returnList[index].quantity.toString()),
),
),
_buildQtyBtn(Icons.add, () {
if (returnList[index].quantity < (returnList[index].stock ?? 0)) {
setState(() {
returnList[index].quantity++;
controllers[index].text = returnList[index].quantity.toString();
_updateTotalController();
});
} else {
EasyLoading.showError(_lang.outOfStock);
}
}),
],
),
),
],
),
),
);
},
),
],
).visible(returnList.isNotEmpty),
),
const SizedBox(height: 20),
// Total Amount Box
Container(
padding: const EdgeInsets.all(10),
decoration: BoxDecoration(
boxShadow: [
BoxShadow(
color: const Color(0xff000000).withValues(alpha: 0.08),
spreadRadius: 0,
offset: const Offset(0, 4),
blurRadius: 24)
],
color: theme.colorScheme.primaryContainer,
borderRadius: const BorderRadius.all(Radius.circular(5.0)),
),
child: Column(
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text('${_lang.totalReturnAmount}:', style: TextStyle(fontSize: 16)),
Text('$currency ${getTotalReturnAmount().toStringAsFixed(2)}',
style: const TextStyle(fontSize: 16)),
],
),
const SizedBox(height: 4),
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Flexible(child: Text('${_lang.nonFoundableDiscount}:', style: TextStyle(fontSize: 16))),
Text('$currency ${vatAmount.toStringAsFixed(2)}', style: const TextStyle(fontSize: 16)),
],
),
],
),
),
// Payment Widget
MultiPaymentWidget(
key: _paymentKey,
totalAmountController: _totalReturnAmountController,
showWalletOption: true,
hideAddButton: true,
),
],
),
),
),
bottomNavigationBar: Padding(
padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 16),
child: Row(
children: [
Expanded(
child: OutlinedButton(
style: OutlinedButton.styleFrom(minimumSize: const Size(double.infinity, 48)),
onPressed: () => Navigator.pop(context),
child: Text(
lang.S.of(context).cancel,
style: theme.textTheme.bodyMedium?.copyWith(
color: theme.colorScheme.primary,
fontWeight: FontWeight.w600,
),
),
),
),
const SizedBox(width: 20),
Expanded(
child: ElevatedButton(
style: ElevatedButton.styleFrom(minimumSize: const Size(double.infinity, 48)),
onPressed: () => _submitReturn(consumerRef, permissionService, context),
child: Text(
_lang.confirmReturn,
style: theme.textTheme.bodyMedium?.copyWith(
color: theme.colorScheme.primaryContainer,
fontWeight: FontWeight.w600,
),
),
),
),
],
),
),
),
);
});
}
Widget _buildQtyBtn(IconData icon, VoidCallback onTap) {
return GestureDetector(
onTap: onTap,
child: Container(
height: 20,
width: 20,
decoration: const BoxDecoration(color: kMainColor, borderRadius: BorderRadius.all(Radius.circular(10))),
child: Icon(icon, size: 14, color: Colors.white),
),
);
}
}

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lib/Screens/invoice return/repo/invoice_return_repo.dart Normal file
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import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:http/http.dart' as http;
import 'package:mobile_pos/Provider/product_provider.dart';
import 'package:mobile_pos/Screens/Customers/Provider/customer_provider.dart';
import '../../../Const/api_config.dart';
import '../../../Provider/profile_provider.dart';
import '../../../Provider/transactions_provider.dart';
import '../../../constant.dart';
import '../../../http_client/custome_http_client.dart';
import '../../../service/check_user_role_permission_provider.dart';
class InvoiceReturnRepo {
///__________Sales_return___________________________________________
Future<bool?> createSalesReturn({
required WidgetRef ref,
required BuildContext context,
required ReturnDataModel salesReturn,
}) async {
return _submitReturnRequest(
ref: ref,
context: context,
urlPath: '/sales-return',
body: salesReturn.toJson(),
permission: Permit.saleReturnsCreate.value,
successMessage: 'Sales Return Added successfully!',
onSuccessRefresh: () {
ref.refresh(salesTransactionProvider);
},
);
}
///_________Purchase_return__________________________________
Future<bool?> createPurchaseReturn({
required WidgetRef ref,
required BuildContext context,
required ReturnDataModel returnData,
}) async {
return _submitReturnRequest(
ref: ref,
context: context,
urlPath: '/purchases-return',
body: returnData.toJson(purchase: true),
permission: Permit.purchaseReturnsCreate.value,
successMessage: 'Purchase Return Added successfully!',
onSuccessRefresh: () {
ref.refresh(purchaseTransactionProvider);
},
);
}
///_________Common_Private_Method_to_Avoid_Duplication_______
Future<bool?> _submitReturnRequest({
required WidgetRef ref,
required BuildContext context,
required String urlPath,
required Map<String, dynamic> body,
required String permission,
required String successMessage,
required VoidCallback onSuccessRefresh,
}) async {
final uri = Uri.parse('${APIConfig.url}$urlPath');
try {
CustomHttpClient customHttpClient = CustomHttpClient(client: http.Client(), context: context, ref: ref);
var response = await customHttpClient.post(
url: uri,
addContentTypeInHeader: true,
body: jsonEncode(body),
permission: permission,
);
final parsedData = jsonDecode(response.body);
if (response.statusCode == 200) {
EasyLoading.showSuccess(successMessage);
// Refresh Common Providers
ref.refresh(summaryInfoProvider);
ref.refresh(partiesProvider);
ref.refresh(productProvider);
// Refresh Specific Provider
onSuccessRefresh();
return true;
} else {
_showError(context, parsedData['message'] ?? 'Something went wrong');
return null;
}
} catch (error) {
final errorMessage = error.toString().replaceFirst('Exception: ', '');
_showError(context, errorMessage);
return null;
}
}
// Helper to show error snackbar
void _showError(BuildContext context, String message) {
EasyLoading.dismiss();
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(message),
backgroundColor: kMainColor,
),
);
}
}
class ReturnDataModel {
final String? saleId;
final List<num> returnQty;
List<Map<String, dynamic>> payments;
ReturnDataModel({
required this.saleId,
required this.returnQty,
required this.payments,
});
Map<String, dynamic> toJson({bool purchase = false}) {
return {
purchase ? "purchase_id" : 'sale_id': saleId,
'return_qty': returnQty.map((e) => e.toString()).toList(),
'payments': payments,
};
}
}