Implement toast messages when links are copied

Riot/Modules/Threads/ThreadList/ThreadListViewController.swift

@@ -158,6 +158,8 @@ final class ThreadListViewController: UIViewController {
             renderShowingLongPressActions()
         case .share(let string):
             renderShare(string)
+        case .toastForCopyLink:
+            toastForCopyLink()
         case .error(let error):
             render(error: error)
         }
@@ -256,6 +258,11 @@ final class ThreadListViewController: UIViewController {
         present(activityVC, animated: true, completion: nil)
     }
     
+    private func toastForCopyLink() {
+        view.vc_toast(message: VectorL10n.roomEventCopyLinkInfo,
+                      image: Asset.Images.linkIcon.image)
+    }
+    
     private func render(error: Error) {
         self.activityPresenter.removeCurrentActivityIndicator(animated: true)
         self.errorPresenter.presentError(from: self, forError: error, animated: true, handler: nil)

Riot/Modules/Threads/ThreadList/ThreadListViewModel.swift

@@ -295,6 +295,7 @@ final class ThreadListViewModel: ThreadListViewModelProtocol {
         }
         if let permalink = MXTools.permalink(toEvent: thread.id, inRoom: thread.roomId) {
             MXKPasteboardManager.shared.pasteboard.string = permalink
+            viewState = .toastForCopyLink
         }
         longPressedThread = nil
     }

Riot/Modules/Threads/ThreadList/ThreadListViewState.swift

@@ -27,5 +27,6 @@ enum ThreadListViewState {
     case showingFilterTypes
     case showingLongPressActions
     case share(_ string: String)
+    case toastForCopyLink
     case error(Error)
 }