Settings: Add a settings panel

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

3 files changed, 161 insertions, 0 deletions

diff --git a/WireGuard/WireGuard.xcodeproj/project.pbxproj b/WireGuard/WireGuard.xcodeproj/project.pbxproj
index 9ad2ee8..712da23 100644
--- a/WireGuard/WireGuard.xcodeproj/project.pbxproj
+++ b/WireGuard/WireGuard.xcodeproj/project.pbxproj
@@ -33,6 +33,7 @@
 		6FDEF7FC21863B6100D8FBF6 /* zip.c in Sources */ = {isa = PBXBuildFile; fileRef = 6FDEF7F721863B6100D8FBF6 /* zip.c */; };
 		6FDEF80021863C0100D8FBF6 /* ioapi.c in Sources */ = {isa = PBXBuildFile; fileRef = 6FDEF7FF21863C0100D8FBF6 /* ioapi.c */; };
 		6FDEF802218646BA00D8FBF6 /* ZipArchive.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FDEF801218646B900D8FBF6 /* ZipArchive.swift */; };
+		6FDEF806218725D200D8FBF6 /* SettingsTableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6FDEF805218725D200D8FBF6 /* SettingsTableViewController.swift */; };
 		6FF4AC1F211EC472002C96EB /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 6FF4AC1E211EC472002C96EB /* Assets.xcassets */; };
 		6FF4AC22211EC472002C96EB /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 6FF4AC20211EC472002C96EB /* LaunchScreen.storyboard */; };
 		6FF4AC472120B9E0002C96EB /* NetworkExtension.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 6FF4AC462120B9E0002C96EB /* NetworkExtension.framework */; };
@@ -103,6 +104,7 @@
 		6FDEF7FE21863C0100D8FBF6 /* ioapi.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = ioapi.h; sourceTree = "<group>"; };
 		6FDEF7FF21863C0100D8FBF6 /* ioapi.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = ioapi.c; sourceTree = "<group>"; };
 		6FDEF801218646B900D8FBF6 /* ZipArchive.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ZipArchive.swift; sourceTree = "<group>"; };
+		6FDEF805218725D200D8FBF6 /* SettingsTableViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = SettingsTableViewController.swift; sourceTree = "<group>"; };
 		6FF4AC14211EC46F002C96EB /* WireGuard.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = WireGuard.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6FF4AC1E211EC472002C96EB /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
 		6FF4AC21211EC472002C96EB /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
@@ -187,6 +189,7 @@
 				6F7774E321718281006A79B3 /* TunnelsListTableViewController.swift */,
 				6F7774F221774263006A79B3 /* TunnelEditTableViewController.swift */,
 				6F628C40217F47DB003482A3 /* TunnelDetailTableViewController.swift */,
+				6FDEF805218725D200D8FBF6 /* SettingsTableViewController.swift */,
 			);
 			path = iOS;
 			sourceTree = "<group>";
@@ -449,6 +452,7 @@
 				6F628C41217F47DB003482A3 /* TunnelDetailTableViewController.swift in Sources */,
 				6F7774F321774263006A79B3 /* TunnelEditTableViewController.swift in Sources */,
 				6FDEF802218646BA00D8FBF6 /* ZipArchive.swift in Sources */,
+				6FDEF806218725D200D8FBF6 /* SettingsTableViewController.swift in Sources */,
 				6F7774E1217181B1006A79B3 /* MainViewController.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/WireGuard/WireGuard/UI/iOS/SettingsTableViewController.swift b/WireGuard/WireGuard/UI/iOS/SettingsTableViewController.swift
new file mode 100644
index 0000000..8cbaa2d
--- /dev/null
+++ b/WireGuard/WireGuard/UI/iOS/SettingsTableViewController.swift
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018 WireGuard LLC. All rights reserved.
+
+import UIKit
+
+class SettingsTableViewController: UITableViewController {
+
+    enum SettingsFields: String {
+        case iosAppVersion = "WireGuard for iOS"
+        case goBackendVersion = "WireGuard Go Backend"
+        case exportZipArchive = "Export zip archive"
+    }
+
+    let settingsFieldsBySection : [[SettingsFields]] = [
+        [.iosAppVersion, .goBackendVersion],
+        [.exportZipArchive]
+    ]
+
+    init() {
+        super.init(style: .grouped)
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        self.title = "Settings"
+        self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(doneTapped))
+
+        self.tableView.rowHeight = 44
+        self.tableView.allowsSelection = false
+
+        self.tableView.register(TunnelSettingsTableViewKeyValueCell.self, forCellReuseIdentifier: TunnelSettingsTableViewKeyValueCell.id)
+        self.tableView.register(TunnelSettingsTableViewButtonCell.self, forCellReuseIdentifier: TunnelSettingsTableViewButtonCell.id)
+    }
+
+    @objc func doneTapped() {
+        dismiss(animated: true, completion: nil)
+    }
+}
+
+// MARK: UITableViewDataSource
+
+extension SettingsTableViewController {
+    override func numberOfSections(in tableView: UITableView) -> Int {
+        return settingsFieldsBySection.count
+    }
+
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        return settingsFieldsBySection[section].count
+    }
+
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        switch (section) {
+        case 0:
+            return "About"
+        case 1:
+            return "Export configurations"
+        default:
+            return nil
+        }
+    }
+
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let field = settingsFieldsBySection[indexPath.section][indexPath.row]
+        if (field == .iosAppVersion || field == .goBackendVersion) {
+            let cell = tableView.dequeueReusableCell(withIdentifier: TunnelSettingsTableViewKeyValueCell.id, for: indexPath) as! TunnelSettingsTableViewKeyValueCell
+            cell.key = field.rawValue
+            if (field == .iosAppVersion) {
+                let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "Unknown version"
+                cell.value = appVersion
+            } else if (field == .goBackendVersion) {
+                cell.value = "TODO"
+            }
+            return cell
+        } else {
+            assert(field == .exportZipArchive)
+            let cell = tableView.dequeueReusableCell(withIdentifier: TunnelSettingsTableViewButtonCell.id, for: indexPath) as! TunnelSettingsTableViewButtonCell
+            cell.buttonText = field.rawValue
+            return cell
+        }
+    }
+}
+
+class TunnelSettingsTableViewKeyValueCell: UITableViewCell {
+    static let id: String = "TunnelSettingsTableViewKeyValueCell"
+    var key: String {
+        get { return textLabel?.text ?? "" }
+        set(value) { textLabel?.text = value }
+    }
+    var value: String {
+        get { return detailTextLabel?.text ?? "" }
+        set(value) { detailTextLabel?.text = value }
+    }
+
+    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
+        super.init(style: .value1, reuseIdentifier: TunnelSettingsTableViewKeyValueCell.id)
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func prepareForReuse() {
+        super.prepareForReuse()
+        key = ""
+        value = ""
+    }
+}
+
+class TunnelSettingsTableViewButtonCell: UITableViewCell {
+    static let id: String = "TunnelSettingsTableViewButtonCell"
+    var buttonText: String {
+        get { return button.title(for: .normal) ?? "" }
+        set(value) { button.setTitle(value, for: .normal) }
+    }
+    var onTapped: (() -> Void)? = nil
+
+    let button: UIButton
+
+    override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
+        button = UIButton(type: .system)
+        super.init(style: style, reuseIdentifier: reuseIdentifier)
+        contentView.addSubview(button)
+        button.translatesAutoresizingMaskIntoConstraints = false
+        NSLayoutConstraint.activate([
+            button.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
+            button.centerXAnchor.constraint(equalTo: contentView.centerXAnchor)
+            ])
+        button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
+    }
+
+    @objc func buttonTapped() {
+        onTapped?()
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func prepareForReuse() {
+        super.prepareForReuse()
+        buttonText = ""
+        onTapped = nil
+    }
+}
diff --git a/WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift b/WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift
index eacd896..2533a16 100644
--- a/WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift
+++ b/WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift
@@ -22,6 +22,8 @@ class TunnelsListTableViewController: UITableViewController {
         self.title = "WireGuard"
         let addButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(addButtonTapped(sender:)))
         self.navigationItem.rightBarButtonItem = addButtonItem
+        let settingsButtonItem = UIBarButtonItem(title: "Settings", style: .plain, target: self, action: #selector(settingsButtonTapped(sender:)))
+        self.navigationItem.leftBarButtonItem = settingsButtonItem
 
         self.tableView.rowHeight = 60
 
@@ -68,6 +70,13 @@ class TunnelsListTableViewController: UITableViewController {
         self.present(alert, animated: true, completion: nil)
     }
 
+    @objc func settingsButtonTapped(sender: UIBarButtonItem!) {
+        let settingsVC = SettingsTableViewController()
+        let settingsNC = UINavigationController(rootViewController: settingsVC)
+        settingsNC.modalPresentationStyle = .formSheet
+        self.present(settingsNC, animated: true)
+    }
+
     func openForEditing(configFileURL: URL) {
         let tunnelConfiguration: TunnelConfiguration?
         let name = configFileURL.deletingPathExtension().lastPathComponent