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//
// SelectLocationViewController.swift
// MullvadVPN
//
// Created by pronebird on 02/05/2019.
// Copyright © 2019 Mullvad VPN AB. All rights reserved.
//
import MullvadLogging
import MullvadREST
import MullvadTypes
import UIKit
final class SelectLocationViewController: UIViewController {
private let searchBar = UISearchBar()
private let tableView = UITableView()
private let topContentView = UIStackView()
private let filterView = RelayFilterView()
private var dataSource: LocationDataSource?
private var cachedRelays: CachedRelays?
private var filter = RelayFilter()
var relayLocation: RelayLocation?
override var preferredStatusBarStyle: UIStatusBarStyle {
.lightContent
}
var filterViewShouldBeHidden: Bool {
return (filter.ownership == .any) && (filter.providers == .any)
}
var navigateToFilter: (() -> Void)?
var didSelectRelay: ((RelayLocation) -> Void)?
var didUpdateFilter: ((RelayFilter) -> Void)?
var didFinish: (() -> Void)?
// MARK: - View lifecycle
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .secondaryColor
navigationItem.title = NSLocalizedString(
"NAVIGATION_TITLE",
tableName: "SelectLocation",
value: "Select location",
comment: ""
)
navigationItem.leftBarButtonItem = UIBarButtonItem(
title: NSLocalizedString(
"NAVIGATION_TITLE",
tableName: "SelectLocation",
value: "Filter",
comment: ""
),
primaryAction: UIAction(handler: { [weak self] _ in
self?.navigateToFilter?()
})
)
navigationItem.rightBarButtonItem = UIBarButtonItem(
systemItem: .done,
primaryAction: UIAction(handler: { [weak self] _ in
self?.didFinish?()
})
)
setUpDataSource()
setUpTableView()
setUpTopContent()
view.addConstrainedSubviews([topContentView, tableView]) {
topContentView.pinEdgesToSuperviewMargins(.all().excluding(.bottom))
tableView.pinEdgesToSuperview(.all().excluding(.top))
tableView.topAnchor.constraint(equalTo: topContentView.bottomAnchor)
}
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
tableView.flashScrollIndicators()
}
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
super.viewWillTransition(to: size, with: coordinator)
coordinator.animate(alongsideTransition: nil) { _ in
guard let indexPath = self.dataSource?.indexPathForSelectedRelay() else { return }
self.tableView.scrollToRow(at: indexPath, at: .middle, animated: false)
}
}
// MARK: - Public
func setCachedRelays(_ cachedRelays: CachedRelays, filter: RelayFilter) {
self.cachedRelays = cachedRelays
self.filter = filter
if filterViewShouldBeHidden {
filterView.isHidden = true
} else {
filterView.isHidden = false
filterView.setFilter(filter)
}
dataSource?.setRelays(cachedRelays.relays, filter: filter)
}
// MARK: - Private
private func setUpDataSource() {
dataSource = LocationDataSource(tableView: tableView)
dataSource?.didSelectRelayLocation = { [weak self] location in
self?.didSelectRelay?(location)
}
dataSource?.selectedRelayLocation = relayLocation
if let cachedRelays {
dataSource?.setRelays(cachedRelays.relays, filter: filter)
}
}
private func setUpTableView() {
tableView.backgroundColor = view.backgroundColor
tableView.separatorColor = .secondaryColor
tableView.separatorInset = .zero
tableView.estimatedRowHeight = 53
tableView.indicatorStyle = .white
tableView.keyboardDismissMode = .onDrag
}
private func setUpTopContent() {
topContentView.axis = .vertical
topContentView.addArrangedSubview(filterView)
topContentView.addArrangedSubview(searchBar)
filterView.isHidden = filterViewShouldBeHidden
filterView.didUpdateFilter = { [weak self] in
guard let self else { return }
filter = $0
didUpdateFilter?($0)
if let cachedRelays {
setCachedRelays(cachedRelays, filter: filter)
}
}
setUpSearchBar()
}
private func setUpSearchBar() {
searchBar.delegate = self
searchBar.searchBarStyle = .minimal
searchBar.layer.cornerRadius = 8
searchBar.clipsToBounds = true
searchBar.placeholder = NSLocalizedString(
"SEARCHBAR_PLACEHOLDER",
tableName: "SelectLocation",
value: "Search for...",
comment: ""
)
UITextField.SearchTextFieldAppearance.inactive.apply(to: searchBar)
}
}
extension SelectLocationViewController: UISearchBarDelegate {
func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
dataSource?.filterRelays(by: searchText)
}
func searchBarTextDidBeginEditing(_ searchBar: UISearchBar) {
UITextField.SearchTextFieldAppearance.active.apply(to: searchBar)
}
func searchBarTextDidEndEditing(_ searchBar: UISearchBar) {
UITextField.SearchTextFieldAppearance.inactive.apply(to: searchBar)
}
}
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