From 305264d064b4d112ce3e6b7557ace83ff1d636db Mon Sep 17 00:00:00 2001
From: Roopesh Chander <roop@roopc.net>
Date: Tue, 11 Dec 2018 00:30:33 +0530
Subject: [PATCH] Error handling: alertText() can be nil

Indicating that no alert is to be shown for that error.
---
 WireGuard/WireGuard/UI/iOS/ErrorPresenter.swift  | 2 +-
 WireGuard/WireGuard/VPN/TunnelsManager.swift     | 2 +-
 WireGuard/WireGuard/WireGuardAppError.swift      | 2 +-
 WireGuard/WireGuard/ZipArchive/ZipArchive.swift  | 2 +-
 WireGuard/WireGuard/ZipArchive/ZipExporter.swift | 2 +-
 WireGuard/WireGuard/ZipArchive/ZipImporter.swift | 2 +-
 6 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/WireGuard/WireGuard/UI/iOS/ErrorPresenter.swift b/WireGuard/WireGuard/UI/iOS/ErrorPresenter.swift
index 3c4a1bf..c613d67 100644
--- a/WireGuard/WireGuard/UI/iOS/ErrorPresenter.swift
+++ b/WireGuard/WireGuard/UI/iOS/ErrorPresenter.swift
@@ -8,7 +8,7 @@ class ErrorPresenter {
     static func showErrorAlert(error: WireGuardAppError, from sourceVC: UIViewController?,
                                onDismissal: (() -> Void)? = nil, onPresented: (() -> Void)? = nil) {
         guard let sourceVC = sourceVC else { return }
-        let (title, message) = error.alertText()
+        guard let (title, message) = error.alertText() else { return }
         let okAction = UIAlertAction(title: "OK", style: .default) { (_) in
             onDismissal?()
         }
diff --git a/WireGuard/WireGuard/VPN/TunnelsManager.swift b/WireGuard/WireGuard/VPN/TunnelsManager.swift
index b36c9f8..9d04e1f 100644
--- a/WireGuard/WireGuard/VPN/TunnelsManager.swift
+++ b/WireGuard/WireGuard/VPN/TunnelsManager.swift
@@ -31,7 +31,7 @@ enum TunnelsManagerError: WireGuardAppError {
     case tunnelActivationFailedInternalError // startTunnel() succeeded, but activation failed
     case tunnelActivationFailedNoInternetConnection // startTunnel() succeeded, but activation failed since no internet
 
-    func alertText() -> (String, String) {
+    func alertText() -> (String, String)? {
         switch (self) {
         case .tunnelNameEmpty:
             return ("No name provided", "Can't create tunnel with an empty name")
diff --git a/WireGuard/WireGuard/WireGuardAppError.swift b/WireGuard/WireGuard/WireGuardAppError.swift
index 5289633..3e4707d 100644
--- a/WireGuard/WireGuard/WireGuardAppError.swift
+++ b/WireGuard/WireGuard/WireGuardAppError.swift
@@ -2,5 +2,5 @@
 // Copyright © 2018 WireGuard LLC. All Rights Reserved.
 
 protocol WireGuardAppError: Error {
-    func alertText() -> (/* title */ String, /* message */ String)
+    func alertText() -> (/* title */ String, /* message */ String)?
 }
diff --git a/WireGuard/WireGuard/ZipArchive/ZipArchive.swift b/WireGuard/WireGuard/ZipArchive/ZipArchive.swift
index fe633d0..a849daa 100644
--- a/WireGuard/WireGuard/ZipArchive/ZipArchive.swift
+++ b/WireGuard/WireGuard/ZipArchive/ZipArchive.swift
@@ -8,7 +8,7 @@ enum ZipArchiveError: WireGuardAppError {
     case cantOpenOutputZipFileForWriting
     case badArchive
 
-    func alertText() -> (String, String) {
+    func alertText() -> (String, String)? {
         switch (self) {
         case .cantOpenInputZipFile:
             return ("Unable to read zip archive", "The zip archive could not be read.")
diff --git a/WireGuard/WireGuard/ZipArchive/ZipExporter.swift b/WireGuard/WireGuard/ZipArchive/ZipExporter.swift
index a4e9d7a..4f57613 100644
--- a/WireGuard/WireGuard/ZipArchive/ZipExporter.swift
+++ b/WireGuard/WireGuard/ZipArchive/ZipExporter.swift
@@ -6,7 +6,7 @@ import UIKit
 enum ZipExporterError: WireGuardAppError {
     case noTunnelsToExport
 
-    func alertText() -> (String, String) {
+    func alertText() -> (String, String)? {
         switch (self) {
         case .noTunnelsToExport:
             return ("Nothing to export", "There are no tunnels to export")
diff --git a/WireGuard/WireGuard/ZipArchive/ZipImporter.swift b/WireGuard/WireGuard/ZipArchive/ZipImporter.swift
index 507a823..d281fb6 100644
--- a/WireGuard/WireGuard/ZipArchive/ZipImporter.swift
+++ b/WireGuard/WireGuard/ZipArchive/ZipImporter.swift
@@ -6,7 +6,7 @@ import UIKit
 enum ZipImporterError: WireGuardAppError {
     case noTunnelsInZipArchive
 
-    func alertText() -> (String, String) {
+    func alertText() -> (String, String)? {
         switch (self) {
         case .noTunnelsInZipArchive:
             return ("No tunnels in zip archive", "No .conf tunnel files were found inside the zip archive.")