Tunnel detail: Start off with the tunnel detail view

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

WireGuard/WireGuard.xcodeproj/project.pbxproj

@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		6F628C3D217F09E9003482A3 /* TunnelViewModel.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F628C3C217F09E9003482A3 /* TunnelViewModel.swift */; };
 		6F628C3F217F3413003482A3 /* DNSServer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F628C3E217F3413003482A3 /* DNSServer.swift */; };
+		6F628C41217F47DB003482A3 /* TunnelDetailTableViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F628C40217F47DB003482A3 /* TunnelDetailTableViewController.swift */; };
 		6F693A562179E556008551C1 /* Endpoint.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F693A552179E556008551C1 /* Endpoint.swift */; };
 		6F7774E1217181B1006A79B3 /* MainViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F7774DF217181B1006A79B3 /* MainViewController.swift */; };
 		6F7774E2217181B1006A79B3 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6F7774E0217181B1006A79B3 /* AppDelegate.swift */; };
@@ -25,6 +26,7 @@
 /* Begin PBXFileReference section */
 		6F628C3C217F09E9003482A3 /* TunnelViewModel.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TunnelViewModel.swift; sourceTree = "<group>"; };
 		6F628C3E217F3413003482A3 /* DNSServer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DNSServer.swift; sourceTree = "<group>"; };
+		6F628C40217F47DB003482A3 /* TunnelDetailTableViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = TunnelDetailTableViewController.swift; sourceTree = "<group>"; };
 		6F693A552179E556008551C1 /* Endpoint.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Endpoint.swift; sourceTree = "<group>"; };
 		6F7774DF217181B1006A79B3 /* MainViewController.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MainViewController.swift; sourceTree = "<group>"; };
 		6F7774E0217181B1006A79B3 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
@@ -70,6 +72,7 @@
 				6F7774DF217181B1006A79B3 /* MainViewController.swift */,
 				6F7774E321718281006A79B3 /* TunnelsListTableViewController.swift */,
 				6F7774F221774263006A79B3 /* TunnelEditTableViewController.swift */,
+				6F628C40217F47DB003482A3 /* TunnelDetailTableViewController.swift */,
 			);
 			path = iOS;
 			sourceTree = "<group>";
@@ -216,6 +219,7 @@
 				6F628C3D217F09E9003482A3 /* TunnelViewModel.swift in Sources */,
 				6F7774EA217229DB006A79B3 /* IPAddressRange.swift in Sources */,
 				6F7774E82172020C006A79B3 /* Configuration.swift in Sources */,
+				6F628C41217F47DB003482A3 /* TunnelDetailTableViewController.swift in Sources */,
 				6F7774F321774263006A79B3 /* TunnelEditTableViewController.swift in Sources */,
 				6F7774E1217181B1006A79B3 /* MainViewController.swift in Sources */,
 			);

WireGuard/WireGuard/UI/iOS/TunnelDetailTableViewController.swift

@@ -0,0 +1,222 @@
+//
+//  TunnelDetailTableViewController.swift
+//  WireGuard
+//
+//  Created by Roopesh Chander on 17/10/18.
+//  Copyright © 2018 Roopesh Chander. All rights reserved.
+//
+
+import UIKit
+
+// MARK: TunnelDetailTableViewController
+
+class TunnelDetailTableViewController: UITableViewController {
+
+    let interfaceFieldsBySection: [[TunnelViewModel.InterfaceField]] = [
+        [.name],
+        [.publicKey, .copyPublicKey],
+        [.addresses, .listenPort, .mtu, .dns]
+    ]
+
+    let peerFieldsBySection: [[TunnelViewModel.PeerField]] = [
+        [.publicKey, .preSharedKey, .endpoint,
+         .allowedIPs, .persistentKeepAlive]
+    ]
+
+    let tunnelsManager: TunnelsManager
+    let tunnelViewModel: TunnelViewModel
+
+    init(tunnelsManager tm: TunnelsManager, tunnelConfiguration: TunnelConfiguration) {
+        tunnelsManager = tm
+        tunnelViewModel = TunnelViewModel(tunnelConfiguration: tunnelConfiguration)
+        super.init(style: .grouped)
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        self.title = tunnelViewModel.interfaceData[.name]
+        self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .edit, target: self, action: #selector(editTapped))
+
+        self.tableView.rowHeight = 44
+        self.tableView.register(TunnelDetailTableViewKeyValueCell.self, forCellReuseIdentifier: TunnelDetailTableViewKeyValueCell.id)
+        self.tableView.register(TunnelDetailTableViewButtonCell.self, forCellReuseIdentifier: TunnelDetailTableViewButtonCell.id)
+    }
+
+    @objc func editTapped() {
+        print("Edit")
+    }
+}
+
+// MARK: UITableViewDataSource
+
+extension TunnelDetailTableViewController {
+    override func numberOfSections(in tableView: UITableView) -> Int {
+        let numberOfInterfaceSections = interfaceFieldsBySection.count
+        let numberOfPeerSections = peerFieldsBySection.count
+        let numberOfPeers = tunnelViewModel.peersData.count
+
+        return numberOfInterfaceSections + (numberOfPeers * numberOfPeerSections) + 1
+    }
+
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        let numberOfInterfaceSections = interfaceFieldsBySection.count
+        let numberOfPeerSections = peerFieldsBySection.count
+        let numberOfPeers = tunnelViewModel.peersData.count
+
+        if (section < numberOfInterfaceSections) {
+            // Interface
+            return interfaceFieldsBySection[section].count
+        } else if ((numberOfPeers > 0) && (section < (numberOfInterfaceSections + numberOfPeers * numberOfPeerSections))) {
+            // Peer
+            let fieldIndex = (section - numberOfInterfaceSections) % numberOfPeerSections
+            return peerFieldsBySection[fieldIndex].count
+        } else {
+            // Add peer
+            return 1
+        }
+    }
+
+    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
+        let numberOfInterfaceSections = interfaceFieldsBySection.count
+        let numberOfPeerSections = peerFieldsBySection.count
+        let numberOfPeers = tunnelViewModel.peersData.count
+
+        if (section < numberOfInterfaceSections) {
+            // Interface
+            return (section == 0) ? "Interface" : nil
+        } else if ((numberOfPeers > 0) && (section < (numberOfInterfaceSections + numberOfPeers * numberOfPeerSections))) {
+            // Peer
+            let fieldIndex = (section - numberOfInterfaceSections) % numberOfPeerSections
+            return (fieldIndex == 0) ? "Peer" : nil
+        } else {
+            // Add peer
+            return nil
+        }
+    }
+
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let numberOfInterfaceSections = interfaceFieldsBySection.count
+        let numberOfPeerSections = peerFieldsBySection.count
+        let numberOfPeers = tunnelViewModel.peersData.count
+
+        let section = indexPath.section
+        let row = indexPath.row
+
+        if (section < numberOfInterfaceSections) {
+            // Interface
+            let interfaceData = tunnelViewModel.interfaceData
+            let field = interfaceFieldsBySection[section][row]
+            if (field == .copyPublicKey) {
+                let cell = tableView.dequeueReusableCell(withIdentifier: TunnelDetailTableViewButtonCell.id, for: indexPath) as! TunnelDetailTableViewButtonCell
+                cell.buttonText = field.rawValue
+                cell.onTapped = {
+                    print("Copying public key is unimplemented") // TODO
+                }
+                return cell
+            } else {
+                let cell = tableView.dequeueReusableCell(withIdentifier: TunnelDetailTableViewKeyValueCell.id, for: indexPath) as! TunnelDetailTableViewKeyValueCell
+                // Set key and value
+                cell.key = field.rawValue
+                cell.value = interfaceData[field]
+                if (field != .publicKey) {
+                    cell.detailTextLabel?.allowsDefaultTighteningForTruncation = true
+                    cell.detailTextLabel?.adjustsFontSizeToFitWidth = true
+                    cell.detailTextLabel?.minimumScaleFactor = 0.85
+                }
+                return cell
+            }
+        } else if ((numberOfPeers > 0) && (section < (numberOfInterfaceSections + numberOfPeers * numberOfPeerSections))) {
+            // Peer
+            let peerIndex = Int((section - numberOfInterfaceSections) / numberOfPeerSections)
+            let peerSectionIndex = (section - numberOfInterfaceSections) % numberOfPeerSections
+            let peerData = tunnelViewModel.peersData[peerIndex]
+            let field = peerFieldsBySection[peerSectionIndex][row]
+            let cell = tableView.dequeueReusableCell(withIdentifier: TunnelDetailTableViewKeyValueCell.id, for: indexPath) as! TunnelDetailTableViewKeyValueCell
+            // Set key and value
+            cell.key = field.rawValue
+            cell.value = peerData[field]
+            if (field != .publicKey && field != .preSharedKey) {
+                cell.detailTextLabel?.allowsDefaultTighteningForTruncation = true
+                cell.detailTextLabel?.adjustsFontSizeToFitWidth = true
+                cell.detailTextLabel?.minimumScaleFactor = 0.85
+            }
+
+            return cell
+        } else {
+            assert(section == (numberOfInterfaceSections + numberOfPeers * numberOfPeerSections))
+            // Delete configuration
+            let cell = tableView.dequeueReusableCell(withIdentifier: TunnelDetailTableViewButtonCell.id, for: indexPath) as! TunnelDetailTableViewButtonCell
+            cell.buttonText = "Delete tunnel"
+            cell.onTapped = {
+                print("Delete peer unimplemented")
+            }
+            return cell
+        }
+    }
+}
+
+class TunnelDetailTableViewKeyValueCell: UITableViewCell {
+    static let id: String = "TunnelDetailTableViewKeyValueCell"
+    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: TunnelDetailTableViewKeyValueCell.id)
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    override func prepareForReuse() {
+        super.prepareForReuse()
+        key = ""
+        value = ""
+    }
+}
+
+class TunnelDetailTableViewButtonCell: UITableViewCell {
+    static let id: String = "TunnelsEditTableViewButtonCell"
+    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() {
+        buttonText = ""
+        onTapped = nil
+    }
+}

WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift

@@ -81,6 +81,18 @@ extension TunnelsListTableViewController {
     }
 }
 
+// MARK: UITableViewDelegate
+
+extension TunnelsListTableViewController {
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        guard let tunnelsManager = tunnelsManager else { return }
+        let tunnelConfiguration = tunnelsManager.tunnel(at: indexPath.row).tunnelProvider.tunnelConfiguration
+        let tunnelDetailVC = TunnelDetailTableViewController(tunnelsManager: tunnelsManager,
+                                                             tunnelConfiguration: tunnelConfiguration)
+        showDetailViewController(tunnelDetailVC, sender: self) // Shall get propagated up to the split-vc
+    }
+}
+
 // MARK: TunnelsManagerDelegate
 
 extension TunnelsListTableViewController: TunnelsManagerDelegate {