android: Cancel notification after message deletion (#1512)

* android: Cancel notification after message deletion

* Improve

* Temporary chat item

* Better

* Changes

* cInfo, cItem

Co-authored-by: JRoberts <8711996+jr-simplex@users.noreply.github.com>

apps/android/app/src/main/java/chat/simplex/app/model/ChatModel.kt

@@ -222,7 +222,10 @@ class ChatModel(val controller: ChatController) {
       chat = chats[i]
       val pItem = chat.chatItems.lastOrNull()
       if (pItem?.id == cItem.id) {
-        chats[i] = chat.copy(chatItems = arrayListOf(cItem))
+        chats[i] = chat.copy(chatItems = arrayListOf(ChatItem.defaultDeleted))
+      }
+      if (cItem.isRcvNew) {
+        decreaseCounterInChat(cInfo.id)
       }
     }
     // remove from current chat
@@ -1201,6 +1204,25 @@ data class ChatItem (
         file = null
       )
     }
+
+    private const val TEMP_DELETED_CHAT_ITEM_ID = -1L
+    val defaultDeleted: ChatItem
+      get() = ChatItem(
+        chatDir = CIDirection.DirectRcv(),
+        meta = CIMeta(
+          itemId = TEMP_DELETED_CHAT_ITEM_ID,
+          itemTs = Clock.System.now(),
+          itemText = generalGetString(R.string.deleted_description),
+          itemStatus = CIStatus.RcvRead(),
+          createdAt = Clock.System.now(),
+          itemDeleted = false,
+          itemEdited = false,
+          editable = false
+        ),
+        content = CIContent.RcvDeleted(deleteMode = CIDeleteMode.cidmBroadcast),
+        quotedItem = null,
+        file = null
+      )
   }
 }
 

apps/android/app/src/main/java/chat/simplex/app/model/NtfManager.kt

@@ -226,6 +226,8 @@ class NtfManager(val context: Context, private val appPreferences: AppPreference
     manager.cancel(CallNotificationId)
   }
 
+  fun hasNotificationsForChat(chatId: String): Boolean = manager.activeNotifications.any { it.id == chatId.hashCode() }
+
   private fun hideSecrets(cItem: ChatItem) : String {
     val md = cItem.formattedText
     return if (md != null) {

apps/android/app/src/main/java/chat/simplex/app/model/SimpleXAPI.kt

@@ -1070,11 +1070,22 @@ open class ChatController(var ctrl: ChatCtrl?, val ntfManager: NtfManager, val a
       is CR.ChatItemUpdated ->
         chatItemSimpleUpdate(r.chatItem)
       is CR.ChatItemDeleted -> {
-        AudioPlayer.stop(r.deletedChatItem.chatItem)
+        val cInfo = r.deletedChatItem.chatInfo
+        val cItem = r.deletedChatItem.chatItem
+        AudioPlayer.stop(cItem)
+        val isLastChatItem = chatModel.getChat(cInfo.id)?.chatItems?.lastOrNull()?.id == cItem.id
+        if (isLastChatItem && ntfManager.hasNotificationsForChat(cInfo.id)) {
+          ntfManager.cancelNotificationsForChat(cInfo.id)
+          ntfManager.notifyMessageReceived(
+            cInfo.id,
+            cInfo.displayName,
+            generalGetString(if (r.toChatItem != null) R.string.marked_deleted_description else R.string.deleted_description)
+          )
+        }
         if (r.toChatItem == null) {
-          chatModel.removeChatItem(r.deletedChatItem.chatInfo, r.deletedChatItem.chatItem)
+          chatModel.removeChatItem(cInfo, cItem)
         } else {
-          chatModel.upsertChatItem(r.toChatItem.chatInfo, r.toChatItem.chatItem)
+          chatModel.upsertChatItem(cInfo, r.toChatItem.chatItem)
         }
       }
       is CR.ReceivedGroupInvitation -> {