taler-ios

ErrorView.swift (10067B)

---

 /*
  * This file is part of GNU Taler, ©2022-26 Taler Systems S.A.
  * See LICENSE.md
  */
 /**
  * @author Iván Ávalos
  * @author Marc Stibane
  */
 import SwiftUI
 import taler_swift
 
 enum BannerType {
     case error
     case networkUnavailable
     case warning5sec
 }
 
 struct ErrorBanner: View {
     let type: BannerType
     
     init(_ type: BannerType) {
         self.type = type
     }
 
     var errorText: String {
         switch type {
             case .error:
                 return "An error occurred…"
             case .networkUnavailable:
                 return "Network unavailable!"
             case .warning5sec:
                 return "Network is slow…"
         }
     }
 
     var errorColor: Color {
         switch type {
             case .error:
                 return .red
             case .networkUnavailable:
                 return .red
             case .warning5sec:
                 return .yellow
         }
     }
 
     @ScaledMetric var frameHeight: CGFloat = 60          // relative to fontSize
 
     var body: some View {
         let text = Text(errorText)
             .foregroundStyle(.white)
             .talerFont(.title2)
         Group {
             if #available(iOS 26.0, *) {
                 ContainerRelativeShape()
                     .fill(errorColor)
                     .frame(height: frameHeight)
                     .overlay {
                         ZStack {
                             VStack(spacing: 0) {
                                 Color.clear
                                 Rectangle()
                                     .fill(errorColor)
                             }
                             text
                         }
                     }
             } else {  // ContainerRelativeShape exists since iOS 14, but doesn't work correctly
                 text
                     .frame(maxWidth: .infinity, alignment: .center)
                     .frame(height: frameHeight)
                     .background {
                         let radius = 12.0
                         if #available(iOS 16.4, *) {
                             let radii = RectangleCornerRadii(topLeading: radius,
                                                           bottomLeading: 0,
                                                          bottomTrailing: 0,
                                                             topTrailing: radius)
                             UnevenRoundedRectangle(cornerRadii: radii, style: .continuous)
                                 .fill(errorColor)
                         } else {
                             RoundedRectangle(cornerRadius: radius)
                                 .fill(errorColor)
                                 .overlay {
                                     VStack(spacing: 0) {
                                         Color.clear
                                         Rectangle()
                                             .fill(errorColor)
                                     }
                                 }
                         }
                     }
             }
         }
         .transition(.move(edge: .top).combined(with: .scale))
     }
 }
 
 enum ErrorData {
     case message(title: String, message: String)
     case error(Error)
 }
 
 struct ErrorView: View {
     let stack: CallStack?
     var title: String
     var exclam: Bool
     var message: String? = nil
     var requestUrl: String? = nil
     var copyable: Bool
 
     var onDismiss: (() -> Void)?
 
     init(_ stack: CallStack?, title: String, exclam: Bool = true, message: String? = nil,
          requestUrl: String? = nil, copyable: Bool = false, onDismiss: (() -> Void)? = nil) {
         self.stack = stack
         self.title = title
         self.exclam = exclam
         self.message = message
         self.requestUrl = requestUrl
         self.copyable = copyable
         self.onDismiss = onDismiss
     }
 
     init(_ stack: CallStack?, error: Error, devMode: Bool, onDismiss: (() -> Void)? = nil) {
         let internetError = String(localized: "Network problem")
         let internetMessage = String(localized: "Please check your internet connection and try again.")
         let walletCoreError = String(localized: "Internal core error")
         let initializationError = String(localized: "Initialization error")
         let serializationError = String(localized: "Serialization error")
         let deserializationError = String(localized: "Deserialization error")
         let unknownError = String(localized: "Unknown error")
         let userCancelled = String(localized: "User cancelled")
         let transactionError = String(localized: "Transaction Error")
 
         switch error {
             case let walletError as WalletBackendError:
                 switch walletError {
                     case .walletCoreError(let walletBackendResponseError):
                         if let responseError = walletBackendResponseError {
                             let code = responseError.code
                             if code == 7002 || code == 7003 || code == 7005 || code == 7032 || code == 7036 || code == 7049 {
                                 self.init(stack,
                                     title: code == 7036 ? userCancelled
                                          : code == 7049 ? transactionError : internetError,
                                    exclam: code != 7036 && code != 7049,
                                   message: responseError.hint ?? internetMessage,
                                requestUrl: responseError.requestUrl,
                                  copyable: false,
                                 onDismiss: onDismiss)
                                 break
                             }
                             let hint = responseError.errorResponse?.hint ?? responseError.hint      // nested one preferred
                             if !devMode, let hint {
                                 // prefer hint for regular users
                                 self.init(stack, title: walletCoreError, message: hint, copyable: true, onDismiss: onDismiss)
                                 break
                             }
                             if let json = responseError.toJSON() {
                                 // raw JSON for developers, or if there is no hint
                                 self.init(stack, title: walletCoreError, message: json, copyable: true, onDismiss: onDismiss)
                                 break
                             } else if let hint {
                                 // should never happen
                                 self.init(stack, title: walletCoreError, message: hint, copyable: true, onDismiss: onDismiss)
                                 break
 //                            } else if let message = responseError.message {
 //                                self.init(stack, title: walletCoreError, message: message, copyable: true, onDismiss: onDismiss)
 //                                break
                             }
                         }
                         self.init(stack, title: walletCoreError, copyable: false, onDismiss: onDismiss)
                     case .initializationError:
                         self.init(stack, title: initializationError, copyable: false, onDismiss: onDismiss)
                     case .serializationError:
                         self.init(stack, title: serializationError, copyable: false, onDismiss: onDismiss)
                     case .deserializationError:
                         self.init(stack, title: deserializationError, copyable: false, onDismiss: onDismiss)
                 }
             default:
                 self.init(stack, title: unknownError, message: error.localizedDescription, copyable: false, onDismiss: onDismiss)
         }
     }
 
     init(_ stack: CallStack?, data: ErrorData, devMode: Bool, onDismiss: (() -> Void)? = nil) {
         switch data {
             case .message(let title, let message):
                 self.init(stack, title: title, message: message, copyable: false, onDismiss: onDismiss)
             case .error(let error):
                 self.init(stack, error: error, devMode: devMode, onDismiss: onDismiss)
         }
     }
 
     var body: some View {
         ScrollView {
             VStack {
                 if exclam {
                     Image(systemName: EXCLAMATION)
                         .resizable()
                         .frame(width: 50, height: 50)
                         .aspectRatio(contentMode: .fit)
                         .foregroundStyle(WalletColors().attention)
                         .padding()
                 }
                 Text(title)
                     .talerFont(.title)
                     .padding(.bottom)
 
                 if let message {
                     if copyable {
                         if #available(iOS 16.4, *) {
                             Text(message).monospaced()
                         } else {
                             Text(message).font(.system(.body, design: .monospaced))
                         }
 
                         CopyButton(message, vertical: false)
                             .accessibilityLabel(Text("Copy the error JSON", comment: "a11y"))
                             .padding()
                     } else {
                         if let requestUrl {
                             Text(requestUrl)
                                 .multilineTextAlignment(.center)
                                 .padding()
                         }
                         Text(message)
                             .multilineTextAlignment(.center)
                             .padding()
                     }
                 }
             }
         }
         .padding()
         .safeAreaInset(edge: .bottom) {
             Button("OK", role: .cancel) {
                 if let onDismiss {
                     onDismiss()
                 } else {
                     dismissTop(stack?.push())
                 }
             }
             .buttonStyle(TalerButtonStyle(type: .bordered))
             .padding(.bottom)
             .padding(.horizontal)
         }
     }
 }