Add counter and 'all' switch to DNS content blockers

ios/MullvadVPN/Classes/AccessbilityIdentifier.swift

@@ -179,6 +179,7 @@ public enum AccessibilityIdentifier: String {
     case wireGuardPort
 
     // Custom DNS
+    case blockAll
     case blockAdvertising
     case blockTracking
     case blockMalware

ios/MullvadVPN/View controllers/Settings/SettingsCell.swift

@@ -59,6 +59,7 @@ class SettingsCell: UITableViewCell, CustomCellDisclosureHandling {
         }
     }
 
+    private var subCellLeadingIndentation: CGFloat = 0
     private let buttonWidth: CGFloat = 24
     private let infoButton: UIButton = {
         let button = UIButton(type: .custom)
@@ -85,6 +86,8 @@ class SettingsCell: UITableViewCell, CustomCellDisclosureHandling {
         infoButton.isHidden = true
         infoButton.addTarget(self, action: #selector(handleInfoButton(_:)), for: .touchUpInside)
 
+        subCellLeadingIndentation = contentView.layoutMargins.left + UIMetrics.TableView.cellIndentationWidth
+
         titleLabel.translatesAutoresizingMaskIntoConstraints = false
         titleLabel.font = UIFont.systemFont(ofSize: 17)
         titleLabel.textColor = UIColor.Cell.titleTextColor
@@ -149,7 +152,7 @@ class SettingsCell: UITableViewCell, CustomCellDisclosureHandling {
     }
 
     func applySubCellStyling() {
-        contentView.layoutMargins.left += UIMetrics.TableView.cellIndentationWidth
+        contentView.layoutMargins.left = subCellLeadingIndentation
         backgroundView?.backgroundColor = UIColor.Cell.Background.indentationLevelOne
     }
 

ios/MullvadVPN/View controllers/VPNSettings/CustomDNSCellFactory.swift

@@ -46,7 +46,7 @@ final class CustomDNSCellFactory: CellFactoryProtocol {
         cell.titleLabel.text = title
         cell.accessibilityIdentifier = preference.accessibilityIdentifier
         cell.applySubCellStyling()
-        cell.setOn(toggleSetting, animated: false)
+        cell.setOn(toggleSetting, animated: true)
         cell.action = { [weak self] isOn in
             self?.delegate?.didChangeState(
                 for: preference,
@@ -58,6 +58,21 @@ final class CustomDNSCellFactory: CellFactoryProtocol {
     // swiftlint:disable:next function_body_length
     func configureCell(_ cell: UITableViewCell, item: CustomDNSDataSource.Item, indexPath: IndexPath) {
         switch item {
+        case .blockAll:
+            let localizedString = NSLocalizedString(
+                "BLOCK_ALL_CELL_LABEL",
+                tableName: "VPNSettings",
+                value: "All",
+                comment: ""
+            )
+
+            configure(
+                cell,
+                toggleSetting: viewModel.blockAll,
+                title: localizedString,
+                for: .blockAll
+            )
+
         case .blockAdvertising:
             let localizedString = NSLocalizedString(
                 "BLOCK_ADS_CELL_LABEL",

ios/MullvadVPN/View controllers/VPNSettings/CustomDNSDataSource.swift

@@ -49,6 +49,7 @@ final class CustomDNSDataSource: UITableViewDiffableDataSource<
     }
 
     enum Item: Hashable {
+        case blockAll
         case blockAdvertising
         case blockTracking
         case blockMalware
@@ -61,11 +62,21 @@ final class CustomDNSDataSource: UITableViewDiffableDataSource<
         case dnsServerInfo
 
         static var contentBlockers: [Item] {
-            [.blockAdvertising, .blockTracking, .blockMalware, .blockGambling, .blockAdultContent, .blockSocialMedia]
+            [
+                .blockAll,
+                .blockAdvertising,
+                .blockTracking,
+                .blockMalware,
+                .blockGambling,
+                .blockAdultContent,
+                .blockSocialMedia,
+            ]
         }
 
         var accessibilityIdentifier: AccessibilityIdentifier {
             switch self {
+            case .blockAll:
+                return .blockAll
             case .blockAdvertising:
                 return .blockAdvertising
             case .blockTracking:
@@ -403,85 +414,74 @@ final class CustomDNSDataSource: UITableViewDiffableDataSource<
         }
     }
 
-    private func setBlockAdvertising(_ isEnabled: Bool) {
+    private func setBlockAll(_ isEnabled: Bool) {
         let oldViewModel = viewModel
+        viewModel.setBlockAll(isEnabled)
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
 
-        viewModel.setBlockAdvertising(isEnabled)
-
-        if oldViewModel.customDNSPrecondition != viewModel.customDNSPrecondition {
-            reloadDnsServerInfo()
+        [
+            .blockAdvertising,
+            .blockTracking,
+            .blockMalware,
+            .blockAdultContent,
+            .blockGambling,
+            .blockSocialMedia,
+        ].forEach { item in
+            reload(item: item)
         }
+    }
 
-        if !isEditing {
-            delegate?.didChangeViewModel(viewModel)
-        }
+    private func setBlockAdvertising(_ isEnabled: Bool) {
+        let oldViewModel = viewModel
+        viewModel.setBlockAdvertising(isEnabled)
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
     }
 
     private func setBlockTracking(_ isEnabled: Bool) {
         let oldViewModel = viewModel
-
         viewModel.setBlockTracking(isEnabled)
-
-        if oldViewModel.customDNSPrecondition != viewModel.customDNSPrecondition {
-            reloadDnsServerInfo()
-        }
-
-        if !isEditing {
-            delegate?.didChangeViewModel(viewModel)
-        }
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
     }
 
     private func setBlockMalware(_ isEnabled: Bool) {
         let oldViewModel = viewModel
-
         viewModel.setBlockMalware(isEnabled)
-
-        if oldViewModel.customDNSPrecondition != viewModel.customDNSPrecondition {
-            reloadDnsServerInfo()
-        }
-
-        if !isEditing {
-            delegate?.didChangeViewModel(viewModel)
-        }
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
     }
 
     private func setBlockAdultContent(_ isEnabled: Bool) {
         let oldViewModel = viewModel
-
         viewModel.setBlockAdultContent(isEnabled)
-
-        if oldViewModel.customDNSPrecondition != viewModel.customDNSPrecondition {
-            reloadDnsServerInfo()
-        }
-
-        if !isEditing {
-            delegate?.didChangeViewModel(viewModel)
-        }
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
     }
 
     private func setBlockGambling(_ isEnabled: Bool) {
         let oldViewModel = viewModel
-
         viewModel.setBlockGambling(isEnabled)
-
-        if oldViewModel.customDNSPrecondition != viewModel.customDNSPrecondition {
-            reloadDnsServerInfo()
-        }
-
-        if !isEditing {
-            delegate?.didChangeViewModel(viewModel)
-        }
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
     }
 
     private func setBlockSocialMedia(_ isEnabled: Bool) {
         let oldViewModel = viewModel
-
         viewModel.setBlockSocialMedia(isEnabled)
+        reloadBlockerData(isEnabled, oldViewModel: oldViewModel)
+    }
 
+    private func reloadBlockerData(_ isEnabled: Bool, oldViewModel: VPNSettingsViewModel) {
         if oldViewModel.customDNSPrecondition != viewModel.customDNSPrecondition {
             reloadDnsServerInfo()
         }
 
+        if !isEnabled || viewModel.allBlockersEnabled {
+            reload(item: .blockAll)
+        }
+
+        if
+            let index = snapshot().sectionIdentifiers.firstIndex(of: .contentBlockers),
+            let headerView = tableView?.headerView(forSection: index) as? SettingsHeaderView {
+            configureContentBlockersHeader(headerView)
+        }
+
         if !isEditing {
             delegate?.didChangeViewModel(viewModel)
         }
@@ -588,8 +588,23 @@ final class CustomDNSDataSource: UITableViewDiffableDataSource<
             comment: ""
         )
 
-        header.titleLabel.text = title
+        let enabledBlockersCount = viewModel.enabledBlockersCount
+        let attributedTitle = NSMutableAttributedString(string: title)
+        let blockerCountText = NSAttributedString(string: " (\(enabledBlockersCount))", attributes: [
+            .foregroundColor: UIColor.primaryTextColor.withAlphaComponent(0.6),
+        ])
+
+        if enabledBlockersCount > 0 {
+            attributedTitle.append(blockerCountText)
+        }
+
+        UIView.transition(with: header.titleLabel, duration: 0.2, options: .transitionCrossDissolve) {
+            header.titleLabel.attributedText = attributedTitle
+        }
+        header.titleLabel.sizeToFit()
+
         header.accessibilityCustomActionName = title
+        header.accessibilityValue = "\(enabledBlockersCount)"
         header.accessibilityIdentifier = .dnsContentBlockersHeaderView
 
         header.infoButtonHandler = { [weak self] in
@@ -618,6 +633,9 @@ final class CustomDNSDataSource: UITableViewDiffableDataSource<
 extension CustomDNSDataSource: CustomDNSCellEventHandler {
     func didChangeState(for preference: Item, isOn: Bool) {
         switch preference {
+        case .blockAll:
+            setBlockAll(isOn)
+
         case .blockAdvertising:
             setBlockAdvertising(isOn)
 

ios/MullvadVPN/View controllers/VPNSettings/VPNSettingsViewController.swift

@@ -128,6 +128,7 @@ extension VPNSettingsViewController: VPNSettingsDataSourceDelegate {
         interactor.evaluateDaitaSettingsCompatibility(settings)
     }
 
+    // swiftlint:disable:next function_body_length
     func showPrompt(
         for item: VPNSettingsPromptAlertItem,
         onSave: @escaping () -> Void,

ios/MullvadVPN/View controllers/VPNSettings/VPNSettingsViewModel.swift

@@ -84,6 +84,7 @@ struct DNSServerEntry: Equatable, Hashable {
 }
 
 struct VPNSettingsViewModel: Equatable {
+    private(set) var blockAll: Bool
     private(set) var blockAdvertising: Bool
     private(set) var blockTracking: Bool
     private(set) var blockMalware: Bool
@@ -104,39 +105,69 @@ struct VPNSettingsViewModel: Equatable {
 
     static let defaultWireGuardPorts: [UInt16] = [51820, 53]
 
+    var enabledBlockersCount: Int {
+        [
+            blockAdvertising,
+            blockTracking,
+            blockMalware,
+            blockAdultContent,
+            blockGambling,
+            blockSocialMedia,
+        ].filter { $0 }.count
+    }
+
+    var allBlockersEnabled: Bool {
+        enabledBlockersCount == CustomDNSDataSource.Item.contentBlockers.filter { $0 != .blockAll }.count
+    }
+
+    mutating func setBlockAll(_ newValue: Bool) {
+        blockAll = newValue
+        blockAdvertising = newValue
+        blockTracking = newValue
+        blockMalware = newValue
+        blockAdultContent = newValue
+        blockGambling = newValue
+        blockSocialMedia = newValue
+        enableCustomDNS = false
+    }
+
     mutating func setBlockAdvertising(_ newValue: Bool) {
         blockAdvertising = newValue
+        blockAll = allBlockersEnabled
         enableCustomDNS = false
     }
 
     mutating func setBlockTracking(_ newValue: Bool) {
         blockTracking = newValue
+        blockAll = allBlockersEnabled
         enableCustomDNS = false
     }
 
     mutating func setBlockMalware(_ newValue: Bool) {
         blockMalware = newValue
+        blockAll = allBlockersEnabled
         enableCustomDNS = false
     }
 
     mutating func setBlockAdultContent(_ newValue: Bool) {
         blockAdultContent = newValue
+        blockAll = allBlockersEnabled
         enableCustomDNS = false
     }
 
     mutating func setBlockGambling(_ newValue: Bool) {
         blockGambling = newValue
+        blockAll = allBlockersEnabled
         enableCustomDNS = false
     }
 
     mutating func setBlockSocialMedia(_ newValue: Bool) {
         blockSocialMedia = newValue
+        blockAll = allBlockersEnabled
         enableCustomDNS = false
     }
 
     mutating func setEnableCustomDNS(_ newValue: Bool) {
-        blockTracking = false
-        blockAdvertising = false
         enableCustomDNS = newValue
     }
 
@@ -195,12 +226,20 @@ struct VPNSettingsViewModel: Equatable {
 
     init(from tunnelSettings: LatestTunnelSettings = LatestTunnelSettings()) {
         let dnsSettings = tunnelSettings.dnsSettings
+
         blockAdvertising = dnsSettings.blockingOptions.contains(.blockAdvertising)
         blockTracking = dnsSettings.blockingOptions.contains(.blockTracking)
         blockMalware = dnsSettings.blockingOptions.contains(.blockMalware)
         blockAdultContent = dnsSettings.blockingOptions.contains(.blockAdultContent)
         blockGambling = dnsSettings.blockingOptions.contains(.blockGambling)
         blockSocialMedia = dnsSettings.blockingOptions.contains(.blockSocialMedia)
+        blockAll = blockAdvertising
+            && blockTracking
+            && blockMalware
+            && blockAdultContent
+            && blockGambling
+            && blockSocialMedia
+
         enableCustomDNS = dnsSettings.enableCustomDNS
         customDNSDomains = dnsSettings.customDNSDomains.map { ipAddress in
             DNSServerEntry(identifier: UUID(), address: "\(ipAddress)")