[iOS] - Add alert for mobile config download (#27115)

* Add alert for mobile config download and calendar event downloads

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

@@ -737,14 +737,42 @@ extension BrowserViewController: WKNavigationDelegate {
       .mobileConfiguration,
     ]
 
+    let mimeTypesThatRequireSFSafariViewControllerHandlingTexts: [UTType: (String, String)] = [
+      .textCalendar: (Strings.openTextCalendarAlertTitle, Strings.openTextCalendarAlertDescription),
+      .mobileConfiguration: (
+        Strings.openMobileConfigurationAlertTitle, Strings.openMobileConfigurationAlertDescription
+      ),
+    ]
+
     // SFSafariViewController only supports http/https links
     if navigationResponse.isForMainFrame, let url = responseURL,
       url.isWebPage(includeDataURIs: false),
       let tab, tab === tabManager.selectedTab,
       let mimeType = response.mimeType.flatMap({ UTType(mimeType: $0) }),
-      mimeTypesThatRequireSFSafariViewControllerHandling.contains(mimeType)
+      mimeTypesThatRequireSFSafariViewControllerHandling.contains(mimeType),
+      let (alertTitle, alertMessage) = mimeTypesThatRequireSFSafariViewControllerHandlingTexts[
+        mimeType
+      ]
     {
-      handleLinkWithSafariViewController(url, tab: tab)
+      // Do what Chromium does: https://source.chromium.org/chromium/chromium/src/+/main:ios/chrome/browser/download/ui_bundled/safari_download_coordinator.mm;l=100;bpv=1;bpt=1?q=presentMobileConfigAlertFromURL&ss=chromium%2Fchromium%2Fsrc
+      // and present an alert before showing the Safari View Controller
+      let alert = UIAlertController(
+        title: alertTitle,
+        message: String.init(
+          format: alertMessage,
+          url.absoluteString
+        ),
+        preferredStyle: .alert
+      )
+      alert.addAction(
+        UIAlertAction(title: Strings.OBContinueButton, style: .default) { [weak self] _ in
+          self?.handleLinkWithSafariViewController(url, tab: tab)
+        }
+      )
+
+      alert.addAction(UIAlertAction(title: Strings.cancelButtonTitle, style: .cancel))
+      present(alert, animated: true)
+
       return .cancel
     }
 

ios/brave-ios/Sources/BraveStrings/BraveStrings.swift

@@ -3611,6 +3611,34 @@ extension Strings {
     value: "Don't Allow",
     comment: "Don't allow Brave to open the external app URL"
   )
+  public static let openMobileConfigurationAlertTitle = NSLocalizedString(
+    "OpenMobileConfigurationAlertTitle",
+    tableName: "BraveShared",
+    bundle: .module,
+    value: "Configuration profile available",
+    comment: "Title of the alert when a mobile configuration profile is available for download"
+  )
+  public static let openMobileConfigurationAlertDescription = NSLocalizedString(
+    "OpenMobileConfigurationAlertDescription",
+    tableName: "BraveShared",
+    bundle: .module,
+    value: "Continue download a configuration profile from %@",
+    comment: "Title of the alert when a mobile configuration profile is available for download. %@ is the URL placeholder of the website where the profile will be downloaded from"
+  )
+  public static let openTextCalendarAlertTitle = NSLocalizedString(
+    "OpenTextCalendarAlertTitle",
+    tableName: "BraveShared",
+    bundle: .module,
+    value: "Calendar Event available",
+    comment: "Title of the alert when a calendar event is available for download"
+  )
+  public static let openTextCalendarAlertDescription = NSLocalizedString(
+    "OpenTextCalendarAlertDescription",
+    tableName: "BraveShared",
+    bundle: .module,
+    value: "Continue download a calendar event from %@",
+    comment: "Title of the alert when a calendar event is available for download. %@ is the URL placeholder of the website where the calendar will be downloaded from"
+  )
   public static let requestCameraPermissionPrompt = NSLocalizedString(
     "requestCameraPermissionPrompt",
     tableName: "BraveShared",