fix: use OSBarcodeError class to handle error cases, using a description and code, instead of just sending an error message

Author: alexgerardojacinto

plugin/ios/Plugin/CapacitorBarcodeScannerPlugin.swift

@@ -22,13 +22,13 @@ public class CapacitorBarcodeScannerPlugin: CAPPlugin {
         }
 
         guard let manager = self.manager else {
-            call.reject("Capacitor bridge or viewController is not initialized.")
+            call.sendError(with: OSBarcodeError.bridgeNotInitialized)
             return
         }
 
         guard let argumentsData = try? JSONSerialization.data(withJSONObject: call.jsObjectRepresentation),
               let scanArguments = try? JSONDecoder().decode(OSBarcodeScanArgumentsModel.self, from: argumentsData) else {
-            call.reject("Error decoding scan arguments")
+            call.sendError(with: OSBarcodeError.scanInputArgumentsIssue)
             return
         }
 
@@ -37,12 +37,20 @@ public class CapacitorBarcodeScannerPlugin: CAPPlugin {
                 let scannedBarcode = try await manager.scanBarcode(with: scanArguments.scanInstructions, scanArguments.scanButtonText, scanArguments.cameraDirection, and: scanArguments.scanOrientation)
                 call.resolve(["ScanResult": scannedBarcode])
             } catch OSBARCManagerError.cameraAccessDenied {
-                call.reject("Camera access denied")
+                call.sendError(with: OSBarcodeError.cameraAccessDenied)
             } catch OSBARCManagerError.scanningCancelled {
-                call.reject("Scanning cancelled")
+                call.sendError(with: OSBarcodeError.scanningCancelled)
             } catch {
-                call.reject("An unexpected error occurred: \(error.localizedDescription)")
+                call.sendError(with: OSBarcodeError.scanningError)
             }
         }
     }
 }
+
+extension CAPPluginCall {
+    
+    func sendError(with error: OSBarcodeError) {
+        self.reject(error.errorDescription, error.errorCode)
+    }
+    
+}

plugin/ios/Plugin/OSBarcodeError.swift

@@ -11,15 +11,21 @@ enum OSBarcodeError: Int, CustomNSError, LocalizedError {
     case scanningCancelled = 6
     case cameraAccessDenied = 7
     case scanInputArgumentsIssue = 8
+    case bridgeNotInitialized = 13
 
-    var errorDescription: String? {
+    var errorDescription: String {
         switch self {
         case .scanningError: return "Error while trying to scan code."
         case .scanningCancelled: return "Couldn’t scan because the process was cancelled."
         case .cameraAccessDenied: return "Couldn’t scan because camera access wasn’t provided. Check your camera permissions and try again."
         case .scanInputArgumentsIssue: return "Scanning parameters are invalid."
+        case .bridgeNotInitialized: return "Capacitor bridge or viewController is not initialized."
         }
     }
+    
+    var errorCode: String {
+            return "OS-PLUG-BARC-\(String(format: "%04d", self.rawValue))"
+        }
 
     var errorDictionary: [String: String] {
         [