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//
// TunnelsTableViewController.swift
// WireGuard
//
// Created by Jeroen Leenarts on 23-05-18.
// Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All rights reserved.
//
import UIKit
import CoreData
import BNRCoreDataStack
protocol TunnelsTableViewControllerDelegate: class {
func addProvider(tunnelsTableViewController: TunnelsTableViewController)
func connect(tunnel: Tunnel, tunnelsTableViewController: TunnelsTableViewController)
func configure(tunnel: Tunnel, tunnelsTableViewController: TunnelsTableViewController)
func delete(tunnel: Tunnel, tunnelsTableViewController: TunnelsTableViewController)
}
class TunnelsTableViewController: UITableViewController {
weak var delegate: TunnelsTableViewControllerDelegate?
var viewContext: NSManagedObjectContext!
private lazy var fetchedResultsController: FetchedResultsController<Tunnel> = {
let fetchRequest = NSFetchRequest<Tunnel>()
fetchRequest.entity = Tunnel.entity()
fetchRequest.sortDescriptors = [NSSortDescriptor(key: "title", ascending: true)]
let frc = FetchedResultsController<Tunnel>(fetchRequest: fetchRequest,
managedObjectContext: viewContext)
frc.setDelegate(self.frcDelegate)
return frc
}()
private lazy var frcDelegate: TunnelFetchedResultsControllerDelegate = { // swiftlint:disable:this weak_delegate
return TunnelFetchedResultsControllerDelegate(tableView: self.tableView)
}()
override func viewDidLoad() {
super.viewDidLoad()
do {
try fetchedResultsController.performFetch()
} catch {
print("Failed to fetch objects: \(error)")
}
// Get rid of seperator lines in table.
tableView.tableFooterView = UIView(frame: CGRect.zero)
}
@IBAction func addProvider(_ sender: Any) {
delegate?.addProvider(tunnelsTableViewController: 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: TunnelTableViewCell.self, for: indexPath)
guard let sections = fetchedResultsController.sections else {
fatalError("FetchedResultsController \(fetchedResultsController) should have sections, but found nil")
}
let section = sections[indexPath.section]
let tunnel = section.objects[indexPath.row]
cell.textLabel?.text = tunnel.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 tunnel = section.objects[indexPath.row]
delegate?.connect(tunnel: tunnel, tunnelsTableViewController: 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 tunnel = section.objects[indexPath.row]
delegate?.configure(tunnel: tunnel, tunnelsTableViewController: 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 tunnel = section.objects[indexPath.row]
delegate?.delete(tunnel: tunnel, tunnelsTableViewController: self)
}
}
}
extension TunnelsTableViewController: Identifyable {}
class TunnelFetchedResultsControllerDelegate: NSObject, FetchedResultsControllerDelegate {
private weak var tableView: UITableView?
// MARK: - Lifecycle
init(tableView: UITableView) {
self.tableView = tableView
}
func fetchedResultsControllerDidPerformFetch(_ controller: FetchedResultsController<Tunnel>) {
tableView?.reloadData()
}
func fetchedResultsControllerWillChangeContent(_ controller: FetchedResultsController<Tunnel>) {
tableView?.beginUpdates()
}
func fetchedResultsControllerDidChangeContent(_ controller: FetchedResultsController<Tunnel>) {
tableView?.endUpdates()
}
func fetchedResultsController(_ controller: FetchedResultsController<Tunnel>, didChangeObject change: FetchedResultsObjectChange<Tunnel>) {
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<Tunnel>, didChangeSection change: FetchedResultsSectionChange<Tunnel>) {
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 TunnelTableViewCell: UITableViewCell {
}
extension TunnelTableViewCell: Identifyable {}
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