WIP mark chat as read

wip:
Maybe trigger it when the user scrolled to the bottom on his own.
E.g. when a scrolling listener tells "scrolling is finished" we check if it's scrolled to the bottom and then send the mark as read

also todo:
mark as read "when the user is sending the app to the background or navigates "back to conversation list" and the last message a user read (saw on screen) is a higher id then the previous known readmarker"

Signed-off-by: Marcel Hibbe <dev@mhibbe.de>

Author: mahibi

app/src/main/java/com/nextcloud/talk/chat/ChatActivity.kt

@@ -1454,6 +1454,17 @@ class ChatActivity :
                     if (isScrolledToBottom()) {
                         binding.unreadMessagesPopup.visibility = View.GONE
                         binding.scrollDownButton.visibility = View.GONE
+
+
+
+                        // TODO: mark chat as read here
+                        // val previousChatMessage = adapter.items?.getOrNull(1)?.item
+                        // if (previousChatMessage != null && previousChatMessage is ChatMessage) {
+                        //     chatMessage.isGrouped = groupMessages(chatMessage, previousChatMessage)
+                        // }
+                        //
+                        //
+                        // markAsRead(adapter.items......)
                     } else {
                         if (binding.unreadMessagesPopup.isShown) {
                             binding.scrollDownButton.visibility = View.GONE
@@ -3928,9 +3939,24 @@ class ChatActivity :
         }
     }
 
+    private fun markAsRead(messageId: Int) {
+        chatViewModel.setChatReadMarker(
+            credentials!!,
+            ApiUtils.getUrlForChatReadMarker(
+                ApiUtils.getChatApiVersion(spreedCapabilities, intArrayOf(ApiUtils.API_V1)),
+                conversationUser?.baseUrl!!,
+                roomToken
+            ),
+            messageId
+        )
+    }
+
     fun markAsUnread(message: IMessage?) {
         val chatMessage = message as ChatMessage?
         if (chatMessage!!.previousMessageId > NO_PREVIOUS_MESSAGE_ID) {
+            // previousMessageId is taken to mark chat as unread even when "chat-unread" capability is not available
+            // It should be checked if "chat-unread" capability is available and then use
+            // https://nextcloud-talk.readthedocs.io/en/latest/chat/#mark-chat-as-unread
             chatViewModel.setChatReadMarker(
                 credentials!!,
                 ApiUtils.getUrlForChatReadMarker(

app/src/main/java/com/nextcloud/talk/chat/viewmodels/ChatViewModel.kt

@@ -555,8 +555,8 @@ class ChatViewModel @Inject constructor(
             })
     }
 
-    fun setChatReadMarker(credentials: String, url: String, previousMessageId: Int) {
-        chatNetworkDataSource.setChatReadMarker(credentials, url, previousMessageId)
+    fun setChatReadMarker(credentials: String, url: String, lastReadMessage: Int) {
+        chatNetworkDataSource.setChatReadMarker(credentials, url, lastReadMessage)
             .subscribeOn(Schedulers.io())
             .observeOn(AndroidSchedulers.mainThread())
             .subscribe(object : Observer<GenericOverall> {