Refactor code: Improve type checking, error handling, and code format…

…ting

example/lib/model/cart_model.dart

@@ -32,7 +32,6 @@ class Cart {
 
   Map<String, dynamic> toMap() {
     return {
-
       'productId': productId,
       'productName': productName,
       'initialPrice': initialPrice,

lib/chapawebview.dart

@@ -68,7 +68,7 @@ class _ChapaWebViewState extends State<ChapaWebView> {
   }
 
   void handleConnectivityChange(List<ConnectivityResult> result) {
-    if (result == ConnectivityResult.none) {
+    if (result.contains(ConnectivityResult.none)) {
       setState(() {
         isOffline = true;
       });

lib/data/model/response/api_response.dart

@@ -55,7 +55,8 @@ class ApiResponse {
         break;
       case 401:
         try {
-          message = body is Map ? body['message'] ?? "Unauthorized" : "Unauthorized";
+          message =
+              body is Map ? body['message'] ?? "Unauthorized" : "Unauthorized";
           errors.add(message);
         } catch (error) {
           errors.add("Unauthorized");
@@ -67,14 +68,18 @@ class ApiResponse {
         break;
       case 429:
         try {
-          message = body is Map ? body['message'] ?? "Too many requests" : "Too many requests";
+          message = body is Map
+              ? body['message'] ?? "Too many requests"
+              : "Too many requests";
           errors.add(message);
         } catch (error) {
           errors.add("Too many requests");
         }
         break;
       default:
-        message = body is Map ? body["message"] ?? "Something went wrong." : "Something went wrong.";
+        message = body is Map
+            ? body["message"] ?? "Something went wrong."
+            : "Something went wrong.";
         break;
     }
 

lib/domain/constants/extentions.dart

@@ -35,7 +35,8 @@ extension PaymentTypeExtension on LocalPaymentMethods {
 
   /// Returns the `VerificationType` associated with the payment method.
   VerificationType verificationType() {
-    return VerificationType.ussd; // All methods default to USSD in this implementation.
+    return VerificationType
+        .ussd; // All methods default to USSD in this implementation.
   }
 
   /// Returns the icon path for the payment method.
@@ -91,7 +92,8 @@ extension StringExtension on String {
       case "pending":
         return PaymentStatus.pending;
       default:
-        return PaymentStatus.pending; // Defaults to pending in this implementation.
+        return PaymentStatus
+            .pending; // Defaults to pending in this implementation.
     }
   }
 }

lib/features/native-checkout/bloc/chapa_native_checkout_event.dart

@@ -6,13 +6,12 @@ sealed class ChapaNativeCheckoutEvent {}
 
 // ignore: must_be_immutable
 /// Event triggered to initiate the payment process.
-/// 
+///
 /// Contains the payment request data and the public key required for the payment.
 class InitiatePayment extends ChapaNativeCheckoutEvent {
-
   /// The request data needed to initialize a direct charge payment.
   final DirectChargeRequest directChargeRequest;
-  
+
   /// The public key used to authenticate the payment request with the Chapa API.
   final String publicKey;
 
@@ -28,19 +27,18 @@ class InitiatePayment extends ChapaNativeCheckoutEvent {
 
 // ignore: must_be_immutable
 /// Event triggered to validate a payment after initiation.
-/// 
+///
 /// Contains the request data to verify the payment status and the public key.
 class ValidatePayment extends ChapaNativeCheckoutEvent {
-
   /// The request data needed to validate the direct charge payment.
   final ValidateDirectChargeRequest validateDirectChargeRequest;
-  
+
   /// The public key used to authenticate the payment validation with the Chapa API.
   final String publicKey;
 
   /// Constructor for the [ValidatePayment] event.
   ///
-  /// [validateDirectChargeRequest]: The request object containing reference and 
+  /// [validateDirectChargeRequest]: The request object containing reference and
   /// other details to validate the payment.
   /// [publicKey]: The public key used for authentication with the Chapa API.
   ValidatePayment({