iOS: Consolidate all showConfirmationAlert()s into one place

Signed-off-by: Roopesh Chander <roop@roopc.net>

WireGuard/WireGuard.xcodeproj/project.pbxproj

@@ -50,6 +50,7 @@
 		6BD5C97E220D1AE200784E08 /* key.c in Sources */ = {isa = PBXBuildFile; fileRef = 6BD5C979220D1AE100784E08 /* key.c */; };
 		6F0F44C9222D55BB00B0FF04 /* TextCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F0F44C8222D55BB00B0FF04 /* TextCell.swift */; };
 		6F0F44CB222D55FD00B0FF04 /* EditableTextCell.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F0F44CA222D55FD00B0FF04 /* EditableTextCell.swift */; };
+		6F19D30422402B8700A126F2 /* ConfirmationAlertPresenter.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F19D30322402B8700A126F2 /* ConfirmationAlertPresenter.swift */; };
 		6F4DD16B21DA558800690EAE /* TunnelListRow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F4DD16A21DA558800690EAE /* TunnelListRow.swift */; };
 		6F4DD16C21DA558F00690EAE /* NSTableView+Reuse.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F4DD16721DA552B00690EAE /* NSTableView+Reuse.swift */; };
 		6F4DD16E21DBEA0700690EAE /* ManageTunnelsRootViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F4DD16D21DBEA0700690EAE /* ManageTunnelsRootViewController.swift */; };
@@ -269,6 +270,7 @@
 		6BD5C97A220D1AE200784E08 /* key.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = key.h; sourceTree = "<group>"; };
 		6F0F44C8222D55BB00B0FF04 /* TextCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TextCell.swift; sourceTree = "<group>"; };
 		6F0F44CA222D55FD00B0FF04 /* EditableTextCell.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EditableTextCell.swift; sourceTree = "<group>"; };
+		6F19D30322402B8700A126F2 /* ConfirmationAlertPresenter.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ConfirmationAlertPresenter.swift; sourceTree = "<group>"; };
 		6F4DD16721DA552B00690EAE /* NSTableView+Reuse.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSTableView+Reuse.swift"; sourceTree = "<group>"; };
 		6F4DD16A21DA558800690EAE /* TunnelListRow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TunnelListRow.swift; sourceTree = "<group>"; };
 		6F4DD16D21DBEA0700690EAE /* ManageTunnelsRootViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ManageTunnelsRootViewController.swift; sourceTree = "<group>"; };
@@ -509,6 +511,7 @@
 				5F4541A721C44F5B00994C13 /* View */,
 				6F7774E0217181B1006A79B3 /* AppDelegate.swift */,
 				6F919EC2218A2AE90023B400 /* ErrorPresenter.swift */,
+				6F19D30322402B8700A126F2 /* ConfirmationAlertPresenter.swift */,
 				5F45417C21C1B23600994C13 /* UITableViewCell+Reuse.swift */,
 				6FF4AC23211EC472002C96EB /* Info.plist */,
 				6FF4AC482120B9E0002C96EB /* WireGuard.entitlements */,
@@ -1278,6 +1281,7 @@
 				5F45419821C2D60500994C13 /* KeyValueCell.swift in Sources */,
 				6FBA103E21D6B6D70051C35F /* TunnelImporter.swift in Sources */,
 				6F9B8A8E223398610041B9C4 /* SSIDOptionDetailTableViewController.swift in Sources */,
+				6F19D30422402B8700A126F2 /* ConfirmationAlertPresenter.swift in Sources */,
 				6F919EC3218A2AE90023B400 /* ErrorPresenter.swift in Sources */,
 				6B62E45F220A6FA900EF34A6 /* PrivateDataConfirmation.swift in Sources */,
 				6F5A2B4821AFF49A0081EDD8 /* FileManager+Extension.swift in Sources */,

WireGuard/WireGuard/UI/iOS/ConfirmationAlertPresenter.swift

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
+
+import UIKit
+
+class ConfirmationAlertPresenter {
+    static func showConfirmationAlert(message: String, buttonTitle: String, from sourceObject: AnyObject, presentingVC: UIViewController, onConfirmed: @escaping (() -> Void)) {
+        let destroyAction = UIAlertAction(title: buttonTitle, style: .destructive) { _ in
+            onConfirmed()
+        }
+        let cancelAction = UIAlertAction(title: tr("actionCancel"), style: .cancel)
+        let alert = UIAlertController(title: "", message: message, preferredStyle: .actionSheet)
+        alert.addAction(destroyAction)
+        alert.addAction(cancelAction)
+
+        if let sourceView = sourceObject as? UIView {
+            alert.popoverPresentationController?.sourceView = sourceView
+            alert.popoverPresentationController?.sourceRect = sourceView.bounds
+        } else if let sourceBarButtonItem = sourceObject as? UIBarButtonItem {
+            alert.popoverPresentationController?.barButtonItem = sourceBarButtonItem
+        }
+
+        presentingVC.present(alert, animated: true, completion: nil)
+    }
+}

WireGuard/WireGuard/UI/iOS/ViewController/TunnelDetailTableViewController.swift

@@ -125,21 +125,6 @@ class TunnelDetailTableViewController: UITableViewController {
         }
     }
 
-    func showConfirmationAlert(message: String, buttonTitle: String, from sourceView: UIView, onConfirmed: @escaping (() -> Void)) {
-        let destroyAction = UIAlertAction(title: buttonTitle, style: .destructive) { _ in
-            onConfirmed()
-        }
-        let cancelAction = UIAlertAction(title: tr("actionCancel"), style: .cancel)
-        let alert = UIAlertController(title: "", message: message, preferredStyle: .actionSheet)
-        alert.addAction(destroyAction)
-        alert.addAction(cancelAction)
-
-        alert.popoverPresentationController?.sourceView = sourceView
-        alert.popoverPresentationController?.sourceRect = sourceView.bounds
-
-        present(alert, animated: true, completion: nil)
-    }
-
     func startUpdatingRuntimeConfiguration() {
         reloadRuntimeConfiguration()
         reloadRuntimeConfigurationTimer?.invalidate()
@@ -435,7 +420,9 @@ extension TunnelDetailTableViewController {
         cell.hasDestructiveAction = true
         cell.onTapped = { [weak self] in
             guard let self = self else { return }
-            self.showConfirmationAlert(message: tr("deleteTunnelConfirmationAlertMessage"), buttonTitle: tr("deleteTunnelConfirmationAlertButtonTitle"), from: cell) { [weak self] in
+            ConfirmationAlertPresenter.showConfirmationAlert(message: tr("deleteTunnelConfirmationAlertMessage"),
+                                       buttonTitle: tr("deleteTunnelConfirmationAlertButtonTitle"),
+                                       from: cell, presentingVC: self) { [weak self] in
                 guard let self = self else { return }
                 self.tunnelsManager.remove(tunnel: self.tunnel) { error in
                     if error != nil {

WireGuard/WireGuard/UI/iOS/ViewController/TunnelEditTableViewController.swift

@@ -311,7 +311,9 @@ extension TunnelEditTableViewController {
         cell.hasDestructiveAction = true
         cell.onTapped = { [weak self, weak peerData] in
             guard let self = self, let peerData = peerData else { return }
-            self.showConfirmationAlert(message: tr("deletePeerConfirmationAlertMessage"), buttonTitle: tr("deletePeerConfirmationAlertButtonTitle"), from: cell) { [weak self] in
+            ConfirmationAlertPresenter.showConfirmationAlert(message: tr("deletePeerConfirmationAlertMessage"),
+                                                             buttonTitle: tr("deletePeerConfirmationAlertButtonTitle"),
+                                                             from: cell, presentingVC: self) { [weak self] in
                 guard let self = self else { return }
                 let removedSectionIndices = self.deletePeer(peer: peerData)
                 let shouldShowExcludePrivateIPs = (self.tunnelViewModel.peersData.count == 1 && self.tunnelViewModel.peersData[0].shouldAllowExcludePrivateIPsControl)
@@ -461,21 +463,6 @@ extension TunnelEditTableViewController {
         loadSections()
         return IndexSet(integer: interfaceFieldsBySection.count + peer.index)
     }
-
-    func showConfirmationAlert(message: String, buttonTitle: String, from sourceView: UIView, onConfirmed: @escaping (() -> Void)) {
-        let destroyAction = UIAlertAction(title: buttonTitle, style: .destructive) { _ in
-            onConfirmed()
-        }
-        let cancelAction = UIAlertAction(title: tr("actionCancel"), style: .cancel)
-        let alert = UIAlertController(title: "", message: message, preferredStyle: .actionSheet)
-        alert.addAction(destroyAction)
-        alert.addAction(cancelAction)
-
-        alert.popoverPresentationController?.sourceView = sourceView
-        alert.popoverPresentationController?.sourceRect = sourceView.bounds
-
-        present(alert, animated: true, completion: nil)
-    }
 }
 
 extension TunnelEditTableViewController {

WireGuard/WireGuard/UI/iOS/ViewController/TunnelsListTableViewController.swift

@@ -238,7 +238,8 @@ class TunnelsListTableViewController: UIViewController {
             tr(format: "deleteTunnelConfirmationAlertButtonMessage (%d)", selectedTunnels.count) :
             tr(format: "deleteTunnelsConfirmationAlertButtonMessage (%d)", selectedTunnels.count)
         let title = tr("deleteTunnelsConfirmationAlertButtonTitle")
-        self.showConfirmationAlert(message: message, buttonTitle: title, from: sender) { [weak self] in
+        ConfirmationAlertPresenter.showConfirmationAlert(message: message, buttonTitle: title,
+                                                         from: sender, presentingVC: self) { [weak self] in
             self?.tunnelsManager?.removeMultiple(tunnels: selectedTunnels) { [weak self] error in
                 guard let self = self else { return }
                 if let error = error {
@@ -250,20 +251,6 @@ class TunnelsListTableViewController: UIViewController {
             }
         }
     }
-
-    func showConfirmationAlert(message: String, buttonTitle: String, from barButtonItem: UIBarButtonItem, onConfirmed: @escaping (() -> Void)) {
-        let destroyAction = UIAlertAction(title: buttonTitle, style: .destructive) { _ in
-            onConfirmed()
-        }
-        let cancelAction = UIAlertAction(title: tr("actionCancel"), style: .cancel)
-        let alert = UIAlertController(title: "", message: message, preferredStyle: .actionSheet)
-        alert.addAction(destroyAction)
-        alert.addAction(cancelAction)
-
-        alert.popoverPresentationController?.barButtonItem = barButtonItem
-
-        present(alert, animated: true, completion: nil)
-    }
 }
 
 extension TunnelsListTableViewController: UIDocumentPickerDelegate {