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phase3: utils.dart null-safe (cart logic + dio5 error handling)

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- cart event handlers rewritten with local list + nullable model fields
- getCartInfo*/addCart/removeCart helpers: nullable List<CartInfo>? params
- addSubproductToCard/addSubproductQty/removeSubproduct: null-safe nested access
- showMessageDialog: DioException + promoted response local
- newCartLineItem params nullable; getWeekDayName default return
- launchURL->launch; RuntimeError code nullable
This commit is contained in:
peima
2026-07-24 20:13:07 +08:00
parent 88dd90ed7c
commit 7e8182259f
1 changed files with 145 additions and 174 deletions
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319
lib/utils/utils.dart
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@@ -37,89 +37,60 @@ typedef void OnOk();
typedef void OnLoadImageError();
class Utils {
static StreamSubscription onProductWillAddToCartSubscription;
static StreamSubscription onProductWillRemoveFromCartSubscription;
static StreamSubscription? onProductWillAddToCartSubscription;
static StreamSubscription? onProductWillRemoveFromCartSubscription;
init() async {
onProductWillAddToCartSubscription =
eventBus.on<OnProductWillAddToCart>().listen((event) {
CartInfo cartInfo =
getCartInfoByBusiness(store.state.cartInfos, event.business);
if (cartInfo == null || cartInfo.productList.length == 0) {
cartInfo = CartInfo();
CartInfo? found = getCartInfoByBusiness(store.state.cartInfos, event.business);
final List<CartLineItem> existing =
(found != null && found.productList != null && found.productList!.isNotEmpty)
? found.productList! : <CartLineItem>[];
CartInfo cartInfo = found ?? CartInfo();
if (existing.isEmpty) {
cartInfo.id = 0;
cartInfo.amountPaid = 0.0;
cartInfo.businessInfo = event.business;
cartInfo.extraFeeList = [];
cartInfo.discountList = [];
CartLineItem lineItem = newCartLineItem(
id: 0,
price: event.price,
product: event.product,
name: event.product.name,
description: event.description,
quantity: 1.0);
id: 0, price: event.price, product: event.product,
name: event.product.name, description: event.description, quantity: 1.0);
cartInfo.productList = [lineItem];
addSubproductToCard(cartInfo, lineItem);
store.dispatch(new UpdateCartInfo(addCartInfoToCartInfoList(
store.state.cartInfos, cartInfo)));
eventBus.fire(new OnCartInfoUpdated());
print('#1');
store.dispatch(UpdateCartInfo(addCartInfoToCartInfoList(store.state.cartInfos, cartInfo)));
eventBus.fire(OnCartInfoUpdated());
} else {
if (event.product.productAttributes.length > 0) {
if ((event.product.productAttributes?.length ?? 0) > 0) {
CartLineItem lineItem = newCartLineItem(
id: 0,
price: event.price,
product: event.product,
name: event.product.name,
description: event.description,
quantity: 1.0);
cartInfo.productList.add(lineItem);
id: 0, price: event.price, product: event.product,
name: event.product.name, description: event.description, quantity: 1.0);
existing.add(lineItem);
addSubproductToCard(cartInfo, lineItem);
store.dispatch(new UpdateCartInfo(addCartInfoToCartInfoList(
store.state.cartInfos, cartInfo)));
print('#2');
eventBus.fire(new OnCartInfoUpdated());
store.dispatch(UpdateCartInfo(addCartInfoToCartInfoList(store.state.cartInfos, cartInfo)));
eventBus.fire(OnCartInfoUpdated());
} else {
int found = -1;
for (var i = 0; i < cartInfo.productList.length; i++) {
if (event.product.id == cartInfo.productList[i].product.id) {
found = i;
break;
}
int foundIndex = -1;
for (var i = 0; i < existing.length; i++) {
if (existing[i].product?.id == event.product.id) { foundIndex = i; break; }
}
if (found == -1) {
if (foundIndex == -1) {
CartLineItem lineItem = newCartLineItem(
id: 0,
price: event.price,
product: event.product,
name: event.product.name,
description: event.description,
quantity: 1.0);
cartInfo.productList.add(lineItem);
id: 0, price: event.price, product: event.product,
name: event.product.name, description: event.description, quantity: 1.0);
existing.add(lineItem);
addSubproductToCard(cartInfo, lineItem);
store.dispatch(new UpdateCartInfo(addCartInfoToCartInfoList(
store.state.cartInfos, cartInfo)));
print('#3');
eventBus.fire(new OnCartInfoUpdated());
store.dispatch(UpdateCartInfo(addCartInfoToCartInfoList(store.state.cartInfos, cartInfo)));
eventBus.fire(OnCartInfoUpdated());
} else {
if (cartInfo.productList[found].quantity + 1.0 >
event.product.leftNum) {
// Fluttertoast.showToast(
// msg: S.of(context).product_insufficient,
// toastLength: Toast.LENGTH_SHORT,
// gravity: ToastGravity.CENTER,
// backgroundColor: Colors.red,
// textColor: Colors.white);
if ((existing[foundIndex].quantity ?? 0) + 1.0 > (event.product.leftNum ?? double.infinity)) {
// insufficient stock
} else {
cartInfo.productList[found].quantity += 1;
addSubproductQty(cartInfo, cartInfo.productList[found]);
store.dispatch(new UpdateCartInfo(
addCartInfoToCartInfoList(
store.state.cartInfos, cartInfo)));
print('#4');
eventBus.fire(new OnCartInfoUpdated());
existing[foundIndex].quantity = (existing[foundIndex].quantity ?? 0) + 1;
addSubproductQty(cartInfo, existing[foundIndex]);
store.dispatch(UpdateCartInfo(addCartInfoToCartInfoList(store.state.cartInfos, cartInfo)));
eventBus.fire(OnCartInfoUpdated());
}
}
}
@@ -127,52 +98,45 @@ class Utils {
});
onProductWillRemoveFromCartSubscription =
eventBus.on<OnProductWillRemoveFromCart>().listen((event) {
CartInfo cartInfo =
getCartInfoByBusiness(store.state.cartInfos, event.business);
if (cartInfo != null) {
if (cartInfo.productList.length > 0) {
CartInfo? found = getCartInfoByBusiness(store.state.cartInfos, event.business);
if (found != null && found.productList != null) {
final existing = found.productList!;
if (existing.isNotEmpty) {
if (event.productListIndex != -1) {
if (cartInfo.productList[event.productListIndex].quantity <= 1) {
String uuid = cartInfo.productList[event.productListIndex].uuid;
cartInfo.productList.removeAt(event.productListIndex);
removeSubproduct(cartInfo, uuid);
if ((existing[event.productListIndex].quantity ?? 0) <= 1) {
String uuid = existing[event.productListIndex].uuid ?? '';
existing.removeAt(event.productListIndex);
removeSubproduct(found, uuid);
} else {
cartInfo.productList[event.productListIndex].quantity -= 1;
addSubproductQty(cartInfo, cartInfo.productList[event.productListIndex], remove: true);
existing[event.productListIndex].quantity = (existing[event.productListIndex].quantity ?? 0) - 1;
addSubproductQty(found, existing[event.productListIndex], remove: true);
}
} else {
int productListIndex = -1;
for (var i = 0; i < cartInfo.productList.length; i++) {
if (cartInfo.productList[i].product.id == event.product.id) {
productListIndex = i;
break;
}
int idx = -1;
for (var i = 0; i < existing.length; i++) {
if (existing[i].product?.id == event.product.id) { idx = i; break; }
}
if (productListIndex != -1) {
if (cartInfo.productList[productListIndex].quantity <= 1) {
String uuid = cartInfo.productList[productListIndex].uuid;
cartInfo.productList.removeAt(productListIndex);
removeSubproduct(cartInfo, uuid);
if (idx != -1) {
if ((existing[idx].quantity ?? 0) <= 1) {
String uuid = existing[idx].uuid ?? '';
existing.removeAt(idx);
removeSubproduct(found, uuid);
} else {
cartInfo.productList[productListIndex].quantity -= 1;
addSubproductQty(cartInfo, cartInfo.productList[productListIndex], remove: true);
existing[idx].quantity = (existing[idx].quantity ?? 0) - 1;
addSubproductQty(found, existing[idx], remove: true);
}
}
}
}
if (cartInfo.productList.length <= 0) {
store.dispatch(UpdateCartInfo(removeCartInfoFromCartInfoList(
store.state.cartInfos, cartInfo)));
if (existing.isEmpty) {
store.dispatch(UpdateCartInfo(removeCartInfoFromCartInfoList(store.state.cartInfos, found)));
} else {
store.dispatch(UpdateCartInfo(addCartInfoToCartInfoList(
store.state.cartInfos, cartInfo)));
store.dispatch(UpdateCartInfo(addCartInfoToCartInfoList(store.state.cartInfos, found)));
}
eventBus.fire(new OnCartInfoUpdated());
eventBus.fire(OnCartInfoUpdated());
}
});
}
static bool equalsIgnoreCase(String a, String b) =>
(a == null && b == null) ||
(a != null && b != null && a.toLowerCase() == b.toLowerCase());
@@ -211,7 +175,7 @@ class Utils {
return false;
}
static Map<String, dynamic> stringToJson(String string) {
static Map<String, dynamic>? stringToJson(String string) {
if (string == null || string.isEmpty) {
return null;
}
@@ -332,7 +296,7 @@ class Utils {
);
}
static showLoadingDialog(BuildContext context, {String message}) {
static showLoadingDialog(BuildContext context, {String? message}) {
showDialog(
context: context,
barrierDismissible: false,
@@ -460,21 +424,24 @@ class Utils {
}
static void showMessageDialog(BuildContext context, dynamic error,
{String title, List<Widget> actions, OnOk onOk}) {
{String? title, List<Widget>? actions, OnOk? onOk}) {
String message = '';
print('error $error');
if (error is DioError && error.response != null) {
if (error.response.data['message'] != null) {
message = error.response.data['message'];
} else if (error.response.data['error'] != null) {
if (error.response.data['error'] is String) {
message = error.response.data['error'];
} else if (error.response.data['error']['errmsg'] != null) {
message = error.response.data['error']['errmsg'];
} else if (error.response.data['error']['message'] != null) {
message = error.response.data['error']['message'];
} else {
message = error.response.data.toString();
if (error is DioException) {
final resp = error.response;
if (resp != null) {
if (resp.data['message'] != null) {
message = resp.data['message'];
} else if (resp.data['error'] != null) {
if (resp.data['error'] is String) {
message = resp.data['error'];
} else if (resp.data['error']['errmsg'] != null) {
message = resp.data['error']['errmsg'];
} else if (resp.data['error']['message'] != null) {
message = resp.data['error']['message'];
} else {
message = resp.data.toString();
}
}
}
} else if (error is String) {
@@ -623,26 +590,26 @@ class Utils {
}
}
static CartInfo getCartInfoByBusiness(
List<CartInfo> cartInfos, Business business) {
static CartInfo? getCartInfoByBusiness(
List<CartInfo>? cartInfos, Business business) {
if (cartInfos == null || cartInfos.length <= 0) {
return null;
}
for (var i = 0; i < cartInfos.length; i++) {
if (cartInfos[i].businessInfo.id == business.id) {
if (cartInfos[i].businessInfo?.id == business.id) {
return cartInfos[i];
}
}
return null;
}
static CartInfo getCartInfoByBusinessId(
List<CartInfo> cartInfos, int businessId) {
static CartInfo? getCartInfoByBusinessId(
List<CartInfo>? cartInfos, int businessId) {
if (cartInfos == null || cartInfos.length <= 0) {
return null;
}
for (var i = 0; i < cartInfos.length; i++) {
if (cartInfos[i].businessInfo.id == businessId) {
if (cartInfos[i].businessInfo?.id == businessId) {
return cartInfos[i];
}
}
@@ -650,13 +617,13 @@ class Utils {
}
static List<CartInfo> addCartInfoToCartInfoList(
List<CartInfo> cartInfos, CartInfo cartInfo) {
List<CartInfo>? cartInfos, CartInfo cartInfo) {
if (cartInfos == null || cartInfos.length <= 0) {
cartInfos = [cartInfo];
} else {
bool found = false;
for (var i = 0; i < cartInfos.length; i++) {
if (cartInfos[i].businessInfo.id == cartInfo.businessInfo.id) {
if (cartInfos[i].businessInfo?.id == cartInfo.businessInfo?.id) {
cartInfos[i] = cartInfo;
found = true;
break;
@@ -675,13 +642,13 @@ class Utils {
}
static List<CartInfo> removeCartInfoFromCartInfoList(
List<CartInfo> cartInfos, CartInfo cartInfo) {
List<CartInfo>? cartInfos, CartInfo? cartInfo) {
if (cartInfos == null || cartInfos.length <= 0 || cartInfo == null) {
return [];
}
int removeIndex = -1;
for (var i = 0; i < cartInfos.length; i++) {
if (cartInfo.businessInfo.id == cartInfos[i].businessInfo.id) {
if (cartInfo.businessInfo?.id == cartInfos[i].businessInfo?.id) {
removeIndex = i;
break;
}
@@ -697,9 +664,9 @@ class Utils {
return cartInfos;
}
static void clearCart(BuildContext context, CartInfo cartInfo,
{OnComplete onComplete}) {
if (cartInfo != null && cartInfo.productList.length > 0) {
static void clearCart(BuildContext context, CartInfo? cartInfo,
{OnComplete? onComplete}) {
if (cartInfo != null && cartInfo.productList != null && cartInfo.productList!.length > 0) {
showDialog(
context: context,
builder: (BuildContext context) {
@@ -733,7 +700,7 @@ class Utils {
}
static void requireLogin(BuildContext context,
{String returnUrl, bool replace = true, int delayMilliseconds = 400}) {
{String? returnUrl, bool replace = true, int delayMilliseconds = 400}) {
Future.delayed(Duration(milliseconds: delayMilliseconds), () {
if (returnUrl != null) {
store.dispatch(UpdateRedirectRoute(returnUrl));
@@ -744,7 +711,7 @@ class Utils {
static String getFirstNumberFromString(String numString) {
final intInStr = RegExp(r'\d+');
return intInStr.firstMatch(numString).group(0);
return intInStr.firstMatch(numString)?.group(0) ?? '';
}
static void loadProducts(int businessId, int categoryId, int page, bool more,
@@ -864,15 +831,18 @@ class Utils {
return S.of(context).sunday;
}
break;
default:
return '';
}
return '';
}
static int getProductLineInOrder(CartInfo cartInfo) {
int qty = 0;
for (CartLineItem lineItem in cartInfo.productList) {
if (lineItem.product.id != null) {
for (CartLineItem lineItem in (cartInfo.productList ?? <CartLineItem>[])) {
if (lineItem.product?.id != null) {
qty += 1;
}
}
@@ -880,10 +850,10 @@ class Utils {
}
static void orderAgain(BuildContext context, CartInfo cartInfo) {
cartInfo.productList.removeWhere((element) => element.product == null || element.product.id == null);
cartInfo.productList?.removeWhere((element) => element.product == null || element.product?.id == null);
store.dispatch(UpdateCartInfo(Utils.addCartInfoToCartInfoList(store.state.cartInfos, cartInfo)));
eventBus.fire(new OnCartInfoUpdated());
Routes.router.navigateTo(context, '/checkout/${cartInfo.businessInfo.id}');
Routes.router.navigateTo(context, '/checkout/${cartInfo.businessInfo?.id}');
}
static String getOrderStatus(BuildContext context, int statusCode) {
@@ -904,18 +874,18 @@ class Utils {
}
static CartLineItem newCartLineItem(
{int id,
double price,
Product product,
String name,
String description,
double quantity,
String parentUuid,
{int? id,
double? price,
Product? product,
String? name,
String? description,
double? quantity,
String? parentUuid,
}) {
CartLineItem lineItem = CartLineItem();
lineItem.unitPrice = price;
lineItem.product = product;
lineItem.name = product.name;
lineItem.name = product?.name;
lineItem.description = description;
lineItem.quantity = quantity;
lineItem.parentUuid = parentUuid;
@@ -923,46 +893,47 @@ class Utils {
}
static void addSubproductToCard(CartInfo cartInfo, CartLineItem lineItem) {
if (lineItem.product.subproducts.length > 0) {
for (int j = 0; j < lineItem.product.subproducts.length; j++) {
cartInfo.productList.add(
newCartLineItem(
id: 0,
price: 0.0,
product: Product(
lineItem.product.subproducts[j].product.id,
lineItem.product.businessId,
lineItem.product.subproducts[j].product.name,
lineItem.product.subproducts[j].product.price,
lineItem.product.subproducts[j].product.description,
lineItem.product.subproducts[j].product.image,
lineItem.product.subproducts[j].product.productAttributes
),
name: lineItem.product.subproducts[j].product.name,
description: lineItem.product.subproducts[j].product.description,
quantity: 1.0,
parentUuid: lineItem.uuid
)
);
}
final product = lineItem.product;
final subs = product?.subproducts;
if (subs == null || subs.isEmpty) return;
for (int j = 0; j < subs.length; j++) {
final sp = subs[j].product;
cartInfo.productList?.add(newCartLineItem(
id: 0,
price: 0.0,
product: Product(
sp?.id ?? 0,
product?.businessId ?? 0,
sp?.name ?? '',
sp?.price ?? 0.0,
sp?.description ?? '',
sp?.image ?? '',
sp?.productAttributes ?? []
),
name: sp?.name ?? '',
description: sp?.description ?? '',
quantity: 1.0,
parentUuid: lineItem.uuid
));
}
}
static void addSubproductQty(CartInfo cartInfo, CartLineItem lineItem,
{bool remove = false}) {
if (lineItem.product.subproducts.length > 0) {
for (var i = 0; i < cartInfo.productList.length; i++) {
CartLineItem lineItem1 = cartInfo.productList[i];
if (lineItem1.parentUuid == lineItem.uuid) {
for (var j = 0; j < lineItem.product.subproducts.length; j++) {
if (lineItem.product.subproducts[j].product.id == lineItem1.product.id) {
if (remove) {
lineItem1.quantity -= lineItem.product.subproducts[j].quantity;
} else {
lineItem1.quantity += lineItem.product.subproducts[j].quantity;
}
break;
final product = lineItem.product;
final subs = product?.subproducts;
if (subs == null || subs.isEmpty) return;
for (var i = 0; i < (cartInfo.productList?.length ?? 0); i++) {
CartLineItem lineItem1 = cartInfo.productList![i];
if (lineItem1.parentUuid == lineItem.uuid) {
for (var j = 0; j < subs.length; j++) {
if (subs[j].product?.id == lineItem1.product?.id) {
if (remove) {
lineItem1.quantity = (lineItem1.quantity ?? 0) - (subs[j].quantity ?? 0);
} else {
lineItem1.quantity = (lineItem1.quantity ?? 0) + (subs[j].quantity ?? 0);
}
break;
}
}
}
@@ -970,7 +941,7 @@ class Utils {
}
static void removeSubproduct(CartInfo cartInfo, String uuid) {
cartInfo.productList.removeWhere((element) => element.parentUuid == uuid);
cartInfo.productList?.removeWhere((element) => element.parentUuid == uuid);
}
static void openEmail(String email) async {
@@ -980,7 +951,7 @@ class Utils {
);
String url = params.toString();
if (await canLaunch(url)) {
await launchURL(url);
await launch(url);
} else {
print('Could not launch $url');
}
@@ -989,13 +960,13 @@ class Utils {
static void callPhone(String phone) async {
String callNo = 'tel://$phone';
if (await canLaunch(callNo)) {
await launchURL(callNo);
await launch(callNo);
} else {
print('Could not call $phone');
}
}
static Widget buildLine(String name, dynamic value, {double nameSize, double valueSize}) {
static Widget buildLine(String name, dynamic value, {double? nameSize, double? valueSize}) {
Row row = Row(
mainAxisAlignment: MainAxisAlignment.start,
crossAxisAlignment: CrossAxisAlignment.start,
@@ -1045,7 +1016,7 @@ class Utils {
}
class RuntimeError extends Error {
final int code;
final int? code;
final String message;
RuntimeError(this.message, {this.code});
String toString() => "Runtime Error: $message";