[iOS] Edit Custom Search Engines

ios/brave-ios/Sources/Brave/Frontend/Browser/BrowserViewController/BrowserViewController.swift

@@ -1439,7 +1439,7 @@ public class BrowserViewController: UIViewController {
         if let presentedNavigationController = presentedViewController
           as? ModalSettingsNavigationController,
           let presentedRootController = presentedNavigationController.viewControllers.first,
-          presentedRootController is SearchSettingsTableViewController
+          presentedRootController is SearchSettingsViewController
         {
           searchEngineSettingsDismissed = true
         }
@@ -2967,7 +2967,7 @@ extension BrowserViewController: SearchViewControllerDelegate {
   }
 
   func presentSearchSettingsController() {
-    let settingsNavigationController = SearchSettingsTableViewController(
+    let settingsNavigationController = SearchSettingsViewController(
       profile: profile,
       privateBrowsingManager: privateBrowsingManager
     )

ios/brave-ios/Sources/Brave/Frontend/Browser/Search/SearchEngines.swift

@@ -250,6 +250,29 @@ public class SearchEngines {
     }
   }
 
+  /// Edits an engine which was already in the list
+  func editSearchEngine(_ engine: OpenSearchEngine, with newEngine: OpenSearchEngine) async throws {
+    guard
+      let customEngineIndex = customEngines.firstIndex(where: {
+        $0.shortName.lowercased() == engine.shortName.lowercased()
+      }),
+      let orderedEngineIndex = orderedEngines.firstIndex(where: {
+        $0.shortName.lowercased() == engine.shortName.lowercased()
+      })
+    else {
+      return
+    }
+
+    customEngines[customEngineIndex] = newEngine
+    orderedEngines[orderedEngineIndex] = newEngine
+
+    do {
+      try await saveCustomEngines()
+    } catch {
+      throw SearchEngineError.failedToSave
+    }
+  }
+
   func queryForSearchURL(_ url: URL?, forType engineType: DefaultEngineType) -> String? {
     return defaultEngine(forType: engineType)?.queryForSearchURL(url)
   }

ios/brave-ios/Sources/Brave/Frontend/Settings/General/SearchEngines/Custom Engines/CustomEngineTableViewHeader.swift

@@ -0,0 +1,70 @@
+// Copyright 2024 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+import BraveUI
+import Shared
+import UIKit
+
+class SearchEngineTableViewHeader: UITableViewHeaderFooterView, TableViewReusable {
+
+  // MARK: UX
+
+  struct UX {
+    static let addButtonInset: CGFloat = 10
+  }
+
+  // MARK: Properties
+
+  var titleLabel = UILabel().then {
+    $0.font = UIFont.preferredFont(forTextStyle: .footnote)
+    $0.textColor = .secondaryBraveLabel
+  }
+
+  lazy var addEngineButton = OpenSearchEngineButton(
+    title: Strings.CustomSearchEngine.customEngineAutoAddTitle,
+    hidesWhenDisabled: false
+  ).then {
+    $0.addTarget(self, action: #selector(addEngineAuto), for: .touchUpInside)
+    $0.isHidden = true
+  }
+
+  var actionHandler: (() -> Void)?
+
+  // MARK: Lifecycle
+
+  override init(reuseIdentifier: String?) {
+    super.init(reuseIdentifier: reuseIdentifier)
+
+    addSubview(titleLabel)
+    addSubview(addEngineButton)
+
+    setConstraints()
+  }
+
+  required init?(coder aDecoder: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
+  // MARK: Internal
+
+  func setConstraints() {
+    titleLabel.snp.makeConstraints { make in
+      make.leading.equalTo(readableContentGuide)
+      make.bottom.equalToSuperview().inset(4)
+    }
+
+    addEngineButton.snp.makeConstraints { make in
+      make.trailing.equalTo(readableContentGuide)
+      make.centerY.equalToSuperview()
+      make.height.equalTo(snp.height)
+    }
+  }
+
+  // MARK: Actions
+
+  @objc private func addEngineAuto() {
+    actionHandler?()
+  }
+}

ios/brave-ios/Sources/Brave/Frontend/Settings/General/SearchEngines/Custom Engines/CustomEngineTitleInputTableViewCell.swift

@@ -0,0 +1,53 @@
+// Copyright 2024 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+import BraveUI
+import UIKit
+
+class CustomEngineTitleInputTableViewCell: UITableViewCell, TableViewReusable {
+
+  // MARK: UX
+
+  struct UX {
+    static let textFieldInset: CGFloat = 16
+  }
+
+  // MARK: Properties
+
+  var textfield: UITextField = UITextField(frame: .zero)
+
+  weak var delegate: UITextFieldDelegate? {
+    didSet {
+      textfield.delegate = delegate
+    }
+  }
+
+  // MARK: Lifecycle
+
+  override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
+    super.init(style: style, reuseIdentifier: reuseIdentifier)
+
+    setup()
+  }
+
+  required init?(coder aDecoder: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
+  // MARK: Internal
+
+  private func setup() {
+    textfield = UITextField(
+      frame: CGRect(x: 0, y: 0, width: contentView.frame.width, height: contentView.frame.height)
+    )
+
+    contentView.addSubview(textfield)
+
+    textfield.snp.makeConstraints({ make in
+      make.leading.trailing.equalToSuperview().inset(UX.textFieldInset)
+      make.bottom.top.equalToSuperview().inset(UX.textFieldInset)
+    })
+  }
+}

ios/brave-ios/Sources/Brave/Frontend/Settings/General/SearchEngines/Custom Engines/CustomEngineURLInputTableViewCell.swift

@@ -0,0 +1,63 @@
+// Copyright 2024 The Brave Authors. All rights reserved.
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+import BraveUI
+import UIKit
+
+class CustomEngineURLInputTableViewCell: UITableViewCell, TableViewReusable {
+
+  // MARK: UX
+
+  struct UX {
+    static let textViewHeight: CGFloat = 88
+    static let textViewInset: CGFloat = 16
+  }
+
+  // MARK: Properties
+
+  var textview = UITextView(frame: .zero)
+
+  weak var delegate: UITextViewDelegate? {
+    didSet {
+      textview.delegate = delegate
+    }
+  }
+  // MARK: Lifecycle
+
+  override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
+    super.init(style: style, reuseIdentifier: reuseIdentifier)
+
+    setup()
+  }
+
+  required init?(coder aDecoder: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
+  // MARK: Internal
+
+  private func setup() {
+    textview = UITextView(
+      frame: CGRect(x: 0, y: 0, width: contentView.frame.width, height: contentView.frame.height)
+    ).then {
+      $0.text = "https://"
+      $0.backgroundColor = .clear
+      $0.font = UIFont.preferredFont(forTextStyle: .body)
+      $0.autocapitalizationType = .none
+      $0.autocorrectionType = .no
+      $0.spellCheckingType = .no
+      $0.keyboardType = .URL
+      $0.textColor = .braveLabel
+    }
+
+    contentView.addSubview(textview)
+
+    textview.snp.makeConstraints({ make in
+      make.leading.trailing.equalToSuperview().inset(UX.textViewInset)
+      make.bottom.top.equalToSuperview()
+      make.height.equalTo(UX.textViewHeight)
+    })
+  }
+}