7916 Sync announcements after webview swiped away

Syncing announcements after the webview is closed will allow the JITM to be automatically removed in response to user action, if the user no longer fits the profile to recieve the message after they have taken the action in the webview.

Author: joshheald

WooCommerce/Classes/ViewRelated/Dashboard/DashboardViewController.swift

@@ -299,6 +299,7 @@ private extension DashboardViewController {
             self.viewModel.syncAnnouncements(for: self.siteID)
         }
         let hostingController = UIHostingController(rootView: webViewSheet)
+        hostingController.presentationController?.delegate = self
         present(hostingController, animated: true, completion: nil)
     }
 
@@ -385,12 +386,21 @@ private extension DashboardViewController {
     }
 }
 
+// MARK: - Delegate conformance
 extension DashboardViewController: DashboardUIScrollDelegate {
     func dashboardUIScrollViewDidScroll(_ scrollView: UIScrollView) {
         hiddenScrollView.updateFromScrollViewDidScrollEventForLargeTitleWorkaround(scrollView)
     }
 }
 
+extension DashboardViewController: UIAdaptivePresentationControllerDelegate {
+    func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
+        if presentationController.presentedViewController is UIHostingController<WebViewSheet> {
+            viewModel.syncAnnouncements(for: siteID)
+        }
+    }
+}
+
 // MARK: - Updates
 //
 private extension DashboardViewController {