macOS: Manage tunnels: Handle the case when there are no tunnels

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

WireGuard/WireGuard/Base.lproj/Localizable.strings

@@ -242,6 +242,8 @@
 "macDeleteTunnelConfirmationAlertButtonTitleDelete" = "Delete";
 "macDeleteTunnelConfirmationAlertButtonTitleCancel" = "Cancel";
 
+"macButtonImportTunnels" = "Import tunnel(s) from file";
+
 // Mac detail view fields
 
 "macDetailFieldKey (%@)" = "%@:";

WireGuard/WireGuard/UI/macOS/ViewController/ManageTunnelsRootViewController.swift

@@ -82,7 +82,8 @@ extension ManageTunnelsRootViewController: TunnelsListTableViewControllerDelegat
         setTunnelDetailContentVC(tunnelDetailVC)
     }
 
-    func tunnelListEmpty() {
-        // TODO
+    func tunnelsListEmpty() {
+        let noTunnelsVC = NoTunnelsDetailViewController(tunnelsManager: tunnelsManager)
+        setTunnelDetailContentVC(noTunnelsVC)
     }
 }

WireGuard/WireGuard/UI/macOS/ViewController/NoTunnelsDetailViewController.swift

@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All Rights Reserved.
+
+import Cocoa
+
+class NoTunnelsDetailViewController: NSViewController {
+
+    let tunnelsManager: TunnelsManager
+
+    let importButton: NSButton = {
+        let button = NSButton()
+        button.title = tr("macButtonImportTunnels")
+        button.setButtonType(.momentaryPushIn)
+        button.bezelStyle = .rounded
+        return button
+    }()
+
+    init(tunnelsManager: TunnelsManager) {
+        self.tunnelsManager = tunnelsManager
+        super.init(nibName: nil, bundle: nil)
+    }
+
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func loadView() {
+        let view = NSView()
+
+        importButton.target = self
+        importButton.action = #selector(importTunnelClicked)
+
+        view.addSubview(importButton)
+        importButton.translatesAutoresizingMaskIntoConstraints = false
+        NSLayoutConstraint.activate([
+            importButton.centerXAnchor.constraint(equalTo: view.centerXAnchor),
+            importButton.centerYAnchor.constraint(equalTo: view.centerYAnchor)
+        ])
+        self.view = view
+    }
+
+    @objc func importTunnelClicked() {
+        guard let window = view.window else { return }
+        let openPanel = NSOpenPanel()
+        openPanel.allowedFileTypes = ["conf", "zip"]
+        openPanel.beginSheetModal(for: window) { [weak tunnelsManager] response in
+            guard let tunnelsManager = tunnelsManager else { return }
+            guard response == .OK else { return }
+            guard let url = openPanel.url else { return }
+            TunnelImporter.importFromFile(url: url, into: tunnelsManager, sourceVC: nil, errorPresenterType: ErrorPresenter.self)
+        }
+    }
+}

WireGuard/WireGuard/UI/macOS/ViewController/TunnelsListTableViewController.swift

@@ -5,7 +5,7 @@ import Cocoa
 
 protocol TunnelsListTableViewControllerDelegate: class {
     func tunnelSelected(tunnel: TunnelContainer)
-    func tunnelListEmpty()
+    func tunnelsListEmpty()
 }
 
 class TunnelsListTableViewController: NSViewController {
@@ -61,7 +61,10 @@ class TunnelsListTableViewController: NSViewController {
     override func loadView() {
         tableView.dataSource = self
         tableView.delegate = self
-        selectTunnel(at: 0)
+        let isSelected = selectTunnel(at: 0)
+        if !isSelected {
+            delegate?.tunnelsListEmpty()
+        }
 
         let scrollView = NSScrollView()
         scrollView.hasVerticalScroller = true
@@ -246,6 +249,9 @@ extension TunnelsListTableViewController {
 
     func tunnelRemoved(at index: Int) {
         tableView.removeRows(at: IndexSet(integer: index), withAnimation: .slideLeft)
+        if tunnelsManager.numberOfTunnels() == 0 {
+            delegate?.tunnelsListEmpty()
+        }
     }
 }
 
@@ -263,12 +269,7 @@ extension TunnelsListTableViewController: NSTableViewDelegate {
     }
 
     func tableViewSelectionDidChange(_ notification: Notification) {
-        guard tableView.selectedRow >= 0 else {
-            if tunnelsManager.numberOfTunnels() == 0 {
-                delegate?.tunnelListEmpty()
-            }
-            return
-        }
+        guard tableView.selectedRow >= 0 else { return }
         let selectedTunnel = tunnelsManager.tunnel(at: tableView.selectedRow)
         delegate?.tunnelSelected(tunnel: selectedTunnel)
     }