[ads] Add search result ad clicked InfoBar on iOS

ios/brave-ios/Sources/Brave/Frontend/Browser/BrowserViewController/BVC+TabManagerDelegate.swift

@@ -211,6 +211,10 @@ extension BrowserViewController: TabManagerDelegate {
       self.downloadToast = downloadToast
     }
 
+    if let searchResultAdClickedInfoBar = toast as? SearchResultAdClickedInfoBar {
+      self.searchResultAdClickedInfoBar = searchResultAdClickedInfoBar
+    }
+
     // If BVC isnt visible hold on to this toast until viewDidAppear
     if view.window == nil {
       pendingToast = toast
@@ -241,6 +245,13 @@ extension BrowserViewController: TabManagerDelegate {
     )
   }
 
+  func hideToastsOnNavigationStartIfNeeded(_ tabManager: TabManager) {
+    if tabManager.selectedTab?.braveSearchResultAdManager == nil {
+      searchResultAdClickedInfoBar?.dismiss(false)
+      searchResultAdClickedInfoBar = nil
+    }
+  }
+
   func tabManagerDidRemoveAllTabs(_ tabManager: TabManager, toast: ButtonToast?) {
     guard let toast = toast, !privateBrowsingManager.isPrivateBrowsing else {
       return

ios/brave-ios/Sources/Brave/Frontend/Browser/BrowserViewController/BVC+WKNavigationDelegate.swift

@@ -97,6 +97,8 @@ extension BrowserViewController: WKNavigationDelegate {
       }
     }
 
+    hideToastsOnNavigationStartIfNeeded(tabManager)
+
     resetRedirectChain(webView)
 
     // Append source URL to redirect chain
@@ -414,13 +416,25 @@ extension BrowserViewController: WKNavigationDelegate {
     if navigationAction.targetFrame?.isMainFrame == true,
       BraveSearchManager.isValidURL(requestURL)
     {
-
       if let braveSearchResultAdManager = tab?.braveSearchResultAdManager,
         braveSearchResultAdManager.isSearchResultAdClickedURL(requestURL),
         navigationAction.navigationType == .linkActivated
       {
-        braveSearchResultAdManager.maybeTriggerSearchResultAdClickedEvent(requestURL)
-        tab?.braveSearchResultAdManager = nil
+        let showSearchResultAdClickedPrivacyNotice =
+          rewards.ads.shouldShowSearchResultAdClickedInfoBar()
+
+        braveSearchResultAdManager.maybeTriggerSearchResultAdClickedEvent(
+          requestURL,
+          completion: { [weak self] success in
+            guard let self, success, showSearchResultAdClickedPrivacyNotice else {
+              return
+            }
+            let searchResultClickedInfobar = SearchResultAdClickedInfoBar(
+              tabManager: self.tabManager
+            )
+            self.show(toast: searchResultClickedInfobar, duration: nil)
+          }
+        )
       } else {
         // The Brave-Search-Ads header should be added with a negative value when all
         // of the following conditions are met:

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

@@ -210,6 +210,8 @@ public class BrowserViewController: UIViewController {
   var downloadToast: DownloadToast?
   /// A toast which is active and not yet dismissed
   var activeButtonToast: Toast?
+  /// An infobar displaying a privacy notice when a search result ad is clicked
+  var searchResultAdClickedInfoBar: SearchResultAdClickedInfoBar?
   /// A boolean to determine If AddToListActivity should be added
   var addToPlayListActivityItem: (enabled: Bool, item: PlaylistInfo?)?
   /// A boolean to determine if OpenInPlaylistActivity should be shown

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

@@ -46,7 +46,7 @@ class BraveSearchResultAdManager: NSObject {
     )
   }
 
-  func maybeTriggerSearchResultAdClickedEvent(_ url: URL) {
+  func maybeTriggerSearchResultAdClickedEvent(_ url: URL, completion: @escaping ((Bool) -> Void)) {
     guard let placementId = getPlacementID(url) else {
       return
     }
@@ -58,7 +58,7 @@ class BraveSearchResultAdManager: NSObject {
     rewards.ads.triggerSearchResultAdEvent(
       searchResultAd,
       eventType: .clicked,
-      completion: { _ in }
+      completion: completion
     )
   }
 

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

@@ -0,0 +1,171 @@
+// 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 DesignSystem
+import Foundation
+import Shared
+import SnapKit
+import SwiftUI
+import UIKit
+
+struct SearchResultAdClickedInfoBarUX {
+  static let toastHeight: CGFloat = 100.0
+  static let toastPadding: CGFloat = 10.0
+  static let toastCloseButtonWidth: CGFloat = 20.0
+  static let toastLabelFont = UIFont.systemFont(ofSize: 15, weight: .semibold)
+  static let toastBackgroundColor = UIColor(braveSystemName: .schemesOnPrimaryFixed)
+  static let learnMoreUrl = "https://support.brave.com/hc/en-us/articles/360026361072-Brave-Ads-FAQ"
+}
+
+class SearchResultAdClickedInfoBar: Toast, UITextViewDelegate {
+  let tabManager: TabManager
+
+  init(tabManager: TabManager) {
+    self.tabManager = tabManager
+
+    super.init(frame: .zero)
+
+    self.tapDismissalMode = .outsideTap
+
+    self.clipsToBounds = true
+    self.addSubview(
+      createView(
+        Strings.searchResultAdsClickedPrivacyNoticeToastTitle + " "
+      )
+    )
+
+    self.toastView.backgroundColor = SearchResultAdClickedInfoBarUX.toastBackgroundColor
+
+    self.toastView.snp.makeConstraints { make in
+      make.left.right.height.equalTo(self)
+      self.animationConstraint =
+        make.top.equalTo(self).offset(SearchResultAdClickedInfoBarUX.toastHeight).constraint
+    }
+
+    self.snp.makeConstraints { make in
+      make.height.equalTo(SearchResultAdClickedInfoBarUX.toastHeight)
+    }
+  }
+
+  required init?(coder aDecoder: NSCoder) {
+    fatalError("init(coder:) has not been implemented")
+  }
+
+  fileprivate func createView(
+    _ labelText: String
+  ) -> UIView {
+    let horizontalStackView = UIStackView()
+    horizontalStackView.axis = .horizontal
+    horizontalStackView.alignment = .center
+    horizontalStackView.spacing = SearchResultAdClickedInfoBarUX.toastPadding
+
+    let label = UITextView()
+    label.textAlignment = .left
+    label.textColor = .white
+    label.font = SearchResultAdClickedInfoBarUX.toastLabelFont
+    label.backgroundColor = SearchResultAdClickedInfoBarUX.toastBackgroundColor
+    label.isEditable = false
+    label.isScrollEnabled = false
+    label.isSelectable = true
+    label.delegate = self
+
+    let learnMoreText = Strings.learnMore.withNonBreakingSpace
+    let attributes: [NSAttributedString.Key: Any] = [
+      .foregroundColor: UIColor.white,
+      .font: SearchResultAdClickedInfoBarUX.toastLabelFont,
+    ]
+
+    let linkAttributes: [NSAttributedString.Key: Any] = [
+      .font: SearchResultAdClickedInfoBarUX.toastLabelFont,
+      .foregroundColor: UIColor.white,
+      .underlineStyle: 1,
+    ]
+    label.linkTextAttributes = linkAttributes
+
+    let nsLabelAttributedString = NSMutableAttributedString(
+      string: labelText,
+      attributes: attributes
+    )
+    let nsLinkAttributedString = NSMutableAttributedString(
+      string: learnMoreText,
+      attributes: linkAttributes
+    )
+
+    if let url = URL(string: SearchResultAdClickedInfoBarUX.learnMoreUrl) {
+      let learnMoreRange = NSRange(location: 0, length: learnMoreText.count)
+      nsLinkAttributedString.addAttribute(.link, value: url, range: learnMoreRange)
+      nsLabelAttributedString.append(nsLinkAttributedString)
+      label.isUserInteractionEnabled = true
+    }
+    label.attributedText = nsLabelAttributedString
+
+    horizontalStackView.addArrangedSubview(label)
+
+    if let buttonImage = UIImage(braveSystemNamed: "leo.close") {
+      let button = UIButton()
+      button.setImage(buttonImage, for: .normal)
+      button.imageView?.contentMode = .scaleAspectFit
+      button.imageView?.tintColor = .white
+      button.imageView?.preferredSymbolConfiguration = .init(
+        font: .preferredFont(for: .title3, weight: .regular),
+        scale: .small
+      )
+
+      button.imageView?.snp.makeConstraints {
+        $0.width.equalTo(SearchResultAdClickedInfoBarUX.toastCloseButtonWidth)
+      }
+
+      button.addGestureRecognizer(
+        UITapGestureRecognizer(target: self, action: #selector(buttonPressed))
+      )
+
+      horizontalStackView.addArrangedSubview(button)
+    }
+
+    toastView.addSubview(horizontalStackView)
+
+    horizontalStackView.snp.makeConstraints { make in
+      make.centerX.equalTo(toastView)
+      make.centerY.equalTo(toastView)
+      make.width.equalTo(toastView.snp.width).offset(
+        -2 * SearchResultAdClickedInfoBarUX.toastPadding
+      )
+    }
+
+    return toastView
+  }
+
+  func textView(
+    _ textView: UITextView,
+    shouldInteractWith url: URL,
+    in characterRange: NSRange,
+    interaction: UITextItemInteraction
+  ) -> Bool {
+    self.tabManager.addTabAndSelect(
+      URLRequest(url: URL(string: SearchResultAdClickedInfoBarUX.learnMoreUrl)!),
+      isPrivate: false
+    )
+    dismiss(true)
+    return false
+  }
+
+  @objc func buttonPressed(_ gestureRecognizer: UIGestureRecognizer) {
+    dismiss(true)
+  }
+
+  override func showToast(
+    viewController: UIViewController? = nil,
+    delay: DispatchTimeInterval = SimpleToastUX.toastDelayBefore,
+    duration: DispatchTimeInterval?,
+    makeConstraints: @escaping (ConstraintMaker) -> Void,
+    completion: (() -> Void)? = nil
+  ) {
+    super.showToast(
+      viewController: viewController,
+      delay: delay,
+      duration: duration,
+      makeConstraints: makeConstraints
+    )
+  }
+}

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

@@ -14,6 +14,8 @@ class Toast: UIView {
 
   var displayState = State.dismissed
 
+  var tapDismissalMode: TapDismissalMode = .anyTap
+
   lazy var gestureRecognizer: UITapGestureRecognizer = {
     let gestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(handleTap))
     gestureRecognizer.cancelsTouchesInView = false
@@ -97,6 +99,14 @@ class Toast: UIView {
   }
 
   @objc func handleTap(_ gestureRecognizer: UIGestureRecognizer) {
+    if tapDismissalMode == .outsideTap {
+      let location = gestureRecognizer.location(in: self)
+      // Check if the tap was inside the toast view
+      if self.point(inside: location, with: nil) {
+        return
+      }
+    }
+
     dismiss(false)
   }
 
@@ -106,4 +116,9 @@ class Toast: UIView {
     case pendingDismiss
     case dismissed
   }
+
+  enum TapDismissalMode {
+    case outsideTap
+    case anyTap
+  }
 }

ios/brave-ios/Sources/Shared/SharedStrings.swift

@@ -337,3 +337,13 @@ extension Strings {
     comment: "Question shown to user when tapping a link that opens the App Store app"
   )
 }
+
+// Search result ad clicked privacy notice toast title
+extension Strings {
+  public static let searchResultAdsClickedPrivacyNoticeToastTitle = NSLocalizedString(
+    "SearchResultAdsClickedPrivacyNoticeToastTitle",
+    bundle: .module,
+    value: "You’ve just clicked on a Brave Search ad. Unlike Big Tech, we measure ad performance anonymously and preserve your privacy.",
+    comment: "Toast displayed after a user clicked a search result ad for the first time."
+  )
+}

ios/browser/api/ads/brave_ads.h

@@ -70,6 +70,11 @@ OBJC_EXPORT
 /// Returns `true` if the user opted-in to search result ads.
 - (BOOL)isOptedInToSearchResultAds;
 
+/// Returns `true` if the privacy notice infobar should be displayed when a user
+/// clicks on a search result ad. This should be called before calling
+/// `triggerSearchResultAdEvent` for the click.
+- (BOOL)shouldShowSearchResultAdClickedInfoBar;
+
 /// Used to notify the ads service that the user has opted-in/opted-out to
 /// Brave News.
 - (void)notifyBraveNewsIsEnabledPreferenceDidChange:(BOOL)isEnabled;

ios/browser/api/ads/brave_ads.mm

@@ -237,6 +237,11 @@ - (BOOL)isOptedInToSearchResultAds {
       brave_ads::prefs::kOptedInToSearchResultAds);
 }
 
+- (BOOL)shouldShowSearchResultAdClickedInfoBar {
+  return self.profilePrefService->GetBoolean(
+      brave_ads::prefs::kShouldShowSearchResultAdClickedInfoBar);
+}
+
 - (void)notifyBraveNewsIsEnabledPreferenceDidChange:(BOOL)isEnabled {
   [self setProfilePref:brave_news::prefs::kBraveNewsOptedIn
                  value:base::Value(isEnabled)];
@@ -1632,10 +1637,19 @@ - (void)triggerSearchResultAdEvent:
     return;
   }
 
+  const auto mojom_event_type =
+      static_cast<brave_ads::mojom::SearchResultAdEventType>(eventType);
   ads->TriggerSearchResultAdEvent(
-      searchResultAd.cppObjPtr,
-      static_cast<brave_ads::mojom::SearchResultAdEventType>(eventType),
-      base::BindOnce(completion));
+      searchResultAd.cppObjPtr, mojom_event_type,
+      base::BindOnce(^(const bool success) {
+        if (success &&
+            mojom_event_type ==
+                brave_ads::mojom::SearchResultAdEventType::kClicked) {
+          self.profilePrefService->SetBoolean(
+              brave_ads::prefs::kShouldShowSearchResultAdClickedInfoBar, false);
+        }
+        completion(success);
+      }));
 }
 
 - (void)purgeOrphanedAdEventsForType:(BraveAdsAdType)adType