iOS: Migrate to Swift

This is in preparation for moving to SwiftUI at some point.

iOS/SelectKeyFileController.swift

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016 - 2019 Jonathan Schleifer <js@heap.zone>
+ *
+ * https://heap.zone/git/scrypt-pwgen.git
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice is present in all copies.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import ObjFW
+import UIKit
+
+class SelectKeyFileController: UITableViewController {
+    public var addSiteController: AddSiteController?
+
+    private var keyFiles: [String] = []
+    private var httpServer: OFHTTPServer
+    private var httpServerDelegate: HTTPServerDelegate
+    private var httpServerThread: OFThread
+
+    required init?(coder aDecoder: NSCoder) {
+        httpServer = OFHTTPServer()
+        httpServer.host = "127.0.0.1".ofObject
+
+        httpServerDelegate = HTTPServerDelegate()
+        httpServer.delegate = self.httpServerDelegate
+
+        httpServerThread = OFThread()
+
+        super.init(coder: aDecoder)
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        guard let documentDirectory = NSSearchPathForDirectoriesInDomains(
+            .documentDirectory, .userDomainMask, true).first
+        else {
+            print("Could not get key files: No documents directory")
+            navigationController?.popViewController(animated: true)
+            return
+        }
+
+        do {
+            keyFiles = try FileManager.default.contentsOfDirectory(
+                atPath: documentDirectory).sorted()
+        } catch let error as NSError {
+            print("Could not get key files: \(error)")
+            navigationController?.popViewController(animated: true)
+            return
+        }
+
+        httpServerThread.start()
+    }
+
+    deinit {
+        httpServerThread.runLoop.stop()
+        httpServerThread.join()
+    }
+
+    override func tableView(_ tableView: UITableView,
+                            numberOfRowsInSection section: Int) -> Int {
+        return keyFiles.count + 1
+    }
+
+    override func tableView(
+        _ tableView: UITableView,
+        cellForRowAt indexPath: IndexPath
+    ) -> UITableViewCell {
+        let cell = tableView.dequeueReusableCell(withIdentifier: "keyFile") ??
+            UITableViewCell(style: .default, reuseIdentifier: "keyFile")
+        cell.textLabel?.text =
+            indexPath.row > 0 ? keyFiles[indexPath.row - 1] : "None"
+        return cell
+    }
+
+    override func tableView(_ tableView: UITableView,
+                            didSelectRowAt indexPath: IndexPath) {
+        addSiteController?.keyFile =
+            indexPath.row > 0 ? keyFiles[indexPath.row - 1] : nil
+        addSiteController?.keyFileLabel?.text =
+            indexPath.row > 0 ? keyFiles[indexPath.row - 1] : "None"
+
+        self.navigationController?.popViewController(animated: true)
+    }
+
+    @IBAction func upload(_ sender: Any?) {
+        let timer = OFTimer.scheduledTimer(withTimeInterval: 0,
+                                           repeats: false) { (OFTimer) in
+            self.httpServer.port = 0
+            self.httpServer.start()
+
+            let message =
+                "Navigate to http://\(self.httpServer.host!.nsObject):" +
+                "\(self.httpServer.port)/ in your browser.\n\n" +
+                "Press OK when done."
+            let alert = UIAlertController(title: "Server Running",
+                                          message: message,
+                                          preferredStyle: .alert)
+            alert.addAction(
+                UIAlertAction(title: "OK", style: .default, handler: nil))
+
+            DispatchQueue.main.sync {
+                self.present(alert, animated: true) {
+                    self.httpServer.stop()
+                }
+            }
+        }
+        httpServerThread.runLoop.add(timer)
+    }
+}