Initial project setup.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Wireguard/Coordinators/AppCoordinator.swift

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+//
+//  AppCoordinator.swift
+//  Wireguard
+//
+//  Created by Jeroen Leenarts on 23-05-18.
+//  Copyright © 2018 Wireguard. All rights reserved.
+//
+
+import Foundation
+
+import CoreData
+import BNRCoreDataStack
+
+class AppCoordinator: RootViewCoordinator {
+
+    let persistentContainer = NSPersistentContainer(name: "Wireguard")
+    let storyboard = UIStoryboard(name: "Main", bundle: nil)
+
+    // MARK: - Properties
+
+    var childCoordinators: [Coordinator] = []
+
+    var rootViewController: UIViewController {
+        return self.connectionsTableViewController
+    }
+
+    var connectionsTableViewController: ConnectionsTableViewController!
+
+    /// Window to manage
+    let window: UIWindow
+
+    let navigationController: UINavigationController = {
+        let navController = UINavigationController()
+        return navController
+    }()
+
+    // MARK: - Init
+    public init(window: UIWindow) {
+        self.window = window
+
+        self.window.rootViewController = self.navigationController
+        self.window.makeKeyAndVisible()
+    }
+
+    // MARK: - Functions
+
+    /// Starts the coordinator
+    public func start() {
+        persistentContainer.viewContext.automaticallyMergesChangesFromParent = true
+        persistentContainer.loadPersistentStores { [weak self] (_, error) in
+            if let error = error {
+                print("Unable to Load Persistent Store. \(error), \(error.localizedDescription)")
+
+            } else {
+                DispatchQueue.main.async {
+                    //start
+                    if let connectionsTableViewController = self?.storyboard.instantiateViewController(type: ConnectionsTableViewController.self) {
+                        self?.connectionsTableViewController = connectionsTableViewController
+                        self?.connectionsTableViewController.viewContext = self?.persistentContainer.viewContext
+                        self?.connectionsTableViewController.delegate = self
+                        self?.navigationController.viewControllers = [connectionsTableViewController]
+                        do {
+                            if let context = self?.persistentContainer.viewContext, try Profile.countInContext(context) == 0 {
+                                print("No profiles ... yet")
+                            }
+                        } catch {
+                            self?.showError(error)
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public func showError(_ error: Error) {
+        showAlert(title: NSLocalizedString("Error", comment: "Error alert title"), message: error.localizedDescription)
+    }
+
+    private func showAlert(title: String, message: String) {
+        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
+        alert.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: "OK button"), style: .default))
+        self.navigationController.present(alert, animated: true)
+    }
+}
+
+extension AppCoordinator: ConnectionsTableViewControllerDelegate {
+    func addProvider(connectionsTableViewController: ConnectionsTableViewController) {
+        // TODO implement
+    }
+
+    func settings(connectionsTableViewController: ConnectionsTableViewController) {
+        // TODO implement
+    }
+
+    func connect(profile: Profile) {
+        // TODO implement
+    }
+
+    func delete(profile: Profile) {
+        // TODO implement
+    }
+}

Wireguard/Coordinators/Coordinator.swift

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+//
+//  Coordinator.swift
+//  Wireguard
+//
+//  Created by Jeroen Leenarts on 23-05-18.
+//  Copyright © 2018 Wireguard. All rights reserved.
+//
+
+import Foundation
+
+/// The Coordinator protocol
+public protocol Coordinator: class {
+
+    /// Starts the coordinator
+    func start()
+
+    /// The array containing any child Coordinators
+    var childCoordinators: [Coordinator] { get set }
+
+}
+
+public extension Coordinator {
+
+    /// Add a child coordinator to the parent
+    public func addChildCoordinator(_ childCoordinator: Coordinator) {
+        self.childCoordinators.append(childCoordinator)
+    }
+
+    /// Remove a child coordinator from the parent
+    public func removeChildCoordinator(_ childCoordinator: Coordinator) {
+        self.childCoordinators = self.childCoordinators.filter { $0 !== childCoordinator }
+    }
+
+}

Wireguard/Coordinators/RootCoordinator.swift

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+//
+//  RootCoordinator.swift
+//  Wireguard
+//
+//  Created by Jeroen Leenarts on 23-05-18.
+//  Copyright © 2018 Wireguard. All rights reserved.
+//
+
+import Foundation
+import UIKit
+
+public protocol RootViewControllerProvider: class {
+    // The coordinators 'rootViewController'. It helps to think of this as the view
+    // controller that can be used to dismiss the coordinator from the view hierarchy.
+    var rootViewController: UIViewController { get }
+}
+
+/// A Coordinator type that provides a root UIViewController
+public typealias RootViewCoordinator = Coordinator & RootViewControllerProvider