Basic setup of ConnectionsTableViewController.

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

Wireguard/ViewControllers/ConnectionsTableViewController.swift

@@ -13,9 +13,9 @@ import BNRCoreDataStack
 
 protocol ConnectionsTableViewControllerDelegate: class {
     func addProvider(connectionsTableViewController: ConnectionsTableViewController)
-    func settings(connectionsTableViewController: ConnectionsTableViewController)
-    func connect(profile: Profile)
-    func delete(profile: Profile)
+    func connect(profile: Profile, connectionsTableViewController: ConnectionsTableViewController)
+    func configure(profile: Profile, connectionsTableViewController: ConnectionsTableViewController)
+    func delete(profile: Profile, connectionsTableViewController: ConnectionsTableViewController)
 }
 
 class ConnectionsTableViewController: UITableViewController {
@@ -23,16 +23,154 @@ class ConnectionsTableViewController: UITableViewController {
 
     var viewContext: NSManagedObjectContext!
 
+    private lazy var fetchedResultsController: FetchedResultsController<Profile> = {
+        let fetchRequest = NSFetchRequest<Profile>()
+        fetchRequest.entity = Profile.entity()
+        fetchRequest.sortDescriptors = [NSSortDescriptor(key: "title", ascending: true)]
+        let frc = FetchedResultsController<Profile>(fetchRequest: fetchRequest,
+                                                    managedObjectContext: viewContext)
+        frc.setDelegate(self.frcDelegate)
+        return frc
+    }()
+
+    private lazy var frcDelegate: ProfileFetchedResultsControllerDelegate = { // swiftlint:disable:this weak_delegate
+        return ProfileFetchedResultsControllerDelegate(tableView: self.tableView)
+    }()
+
     override func viewDidLoad() {
         super.viewDidLoad()
-        // Do any additional setup after loading the view, typically from a nib.
+        do {
+            try fetchedResultsController.performFetch()
+        } catch {
+            print("Failed to fetch objects: \(error)")
+        }
     }
 
-    override func didReceiveMemoryWarning() {
-        super.didReceiveMemoryWarning()
-        // Dispose of any resources that can be recreated.
+    @IBAction func addProvider(_ sender: Any) {
+        delegate?.addProvider(connectionsTableViewController: self)
     }
 
+    override func numberOfSections(in tableView: UITableView) -> Int {
+        return 1
+    }
+
+    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        return fetchedResultsController.sections?[0].objects.count ?? 0
+    }
+
+    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let cell = tableView.dequeueReusableCell(type: ProfileTableViewCell.self, for: indexPath)
+
+        guard let sections = fetchedResultsController.sections else {
+            fatalError("FetchedResultsController \(fetchedResultsController) should have sections, but found nil")
+        }
+
+        let section = sections[indexPath.section]
+        let profile = section.objects[indexPath.row]
+
+        cell.textLabel?.text = profile.title
+
+        return cell
+    }
+
+    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        guard let sections = fetchedResultsController.sections else {
+            fatalError("FetchedResultsController \(fetchedResultsController) should have sections, but found nil")
+        }
+
+        let section = sections[indexPath.section]
+        let profile = section.objects[indexPath.row]
+
+        delegate?.connect(profile: profile, connectionsTableViewController: self)
+
+        tableView.deselectRow(at: indexPath, animated: true)
+    }
+
+    override func tableView(_ tableView: UITableView, accessoryButtonTappedForRowWith indexPath: IndexPath) {
+        guard let sections = fetchedResultsController.sections else {
+            fatalError("FetchedResultsController \(fetchedResultsController) should have sections, but found nil")
+        }
+
+        let section = sections[indexPath.section]
+        let profile = section.objects[indexPath.row]
+
+        delegate?.configure(profile: profile, connectionsTableViewController: self)
+
+    }
+
+    override func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
+        return true
+    }
+
+    override func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
+        if editingStyle == .delete {
+
+            guard let sections = fetchedResultsController.sections else {
+                fatalError("FetchedResultsController \(fetchedResultsController) should have sections, but found nil")
+            }
+
+            let section = sections[indexPath.section]
+            let profile = section.objects[indexPath.row]
+
+            delegate?.delete(profile: profile, connectionsTableViewController: self)
+        }
+    }
 }
 
 extension ConnectionsTableViewController: Identifyable {}
+
+class ProfileFetchedResultsControllerDelegate: NSObject, FetchedResultsControllerDelegate {
+
+    private weak var tableView: UITableView?
+
+    // MARK: - Lifecycle
+    init(tableView: UITableView) {
+        self.tableView = tableView
+    }
+
+    func fetchedResultsControllerDidPerformFetch(_ controller: FetchedResultsController<Profile>) {
+        tableView?.reloadData()
+    }
+
+    func fetchedResultsControllerWillChangeContent(_ controller: FetchedResultsController<Profile>) {
+        tableView?.beginUpdates()
+    }
+
+    func fetchedResultsControllerDidChangeContent(_ controller: FetchedResultsController<Profile>) {
+        tableView?.endUpdates()
+    }
+
+    func fetchedResultsController(_ controller: FetchedResultsController<Profile>, didChangeObject change: FetchedResultsObjectChange<Profile>) {
+        guard let tableView = tableView else { return }
+        switch change {
+        case let .insert(_, indexPath):
+            tableView.insertRows(at: [indexPath], with: .automatic)
+
+        case let .delete(_, indexPath):
+            tableView.deleteRows(at: [indexPath], with: .automatic)
+
+        case let .move(_, fromIndexPath, toIndexPath):
+            tableView.moveRow(at: fromIndexPath, to: toIndexPath)
+
+        case let .update(_, indexPath):
+            tableView.reloadRows(at: [indexPath], with: .automatic)
+        }
+    }
+
+    func fetchedResultsController(_ controller: FetchedResultsController<Profile>, didChangeSection change: FetchedResultsSectionChange<Profile>) {
+        guard let tableView = tableView else { return }
+        switch change {
+        case let .insert(_, index):
+            tableView.insertSections(IndexSet(integer: index), with: .automatic)
+
+        case let .delete(_, index):
+            tableView.deleteSections(IndexSet(integer: index), with: .automatic)
+        }
+    }
+}
+
+class ProfileTableViewCell: UITableViewCell {
+
+}
+
+extension ProfileTableViewCell: Identifyable {}