From 6a3241dc1281f52cb3f4bd29b6e3fb3959dce422 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Tue, 1 May 2018 21:12:00 +0300
Subject: [PATCH] Add dummy calc_new_unread_count_from_last_unread.

GitOrigin-RevId: eb66e452c3e99344180493491d588e0871b3fd91
---
 td/telegram/MessagesManager.cpp | 31 ++++++++++++++++++++++++++-----
 td/telegram/MessagesManager.h   |  5 +++++
 2 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 01dbf8e1..54e27d77 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -8781,12 +8781,12 @@ bool MessagesManager::read_message_content(Dialog *d, Message *m, bool is_local_
   return false;
 }
 
-int32 MessagesManager::calc_new_unread_count(Dialog *d, MessageId max_message_id, MessageType type,
-                                             int32 hint_unread_count) {
-  if (d->is_empty) {
-    return 0;
-  }
+int32 MessagesManager::calc_new_unread_count_from_last_unread(Dialog *d, MessageId max_message_id, MessageType type) {
+  return -1;
+}
 
+int32 MessagesManager::calc_new_unread_count_from_the_end(Dialog *d, MessageId max_message_id, MessageType type,
+                                                          int32 hint_unread_count) {
   int32 unread_count = 0;
   MessagesConstIterator it(d, MessageId::max());
   while (*it != nullptr && (*it)->message_id.get() > max_message_id.get()) {
@@ -8821,6 +8821,27 @@ int32 MessagesManager::calc_new_unread_count(Dialog *d, MessageId max_message_id
   return unread_count;
 }
 
+int32 MessagesManager::calc_new_unread_count(Dialog *d, MessageId max_message_id, MessageType type,
+                                             int32 hint_unread_count) {
+  if (d->is_empty) {
+    return 0;
+  }
+
+  if (!d->last_read_inbox_message_id.is_valid()) {
+    return calc_new_unread_count_from_the_end(d, max_message_id, type, hint_unread_count);
+  }
+
+  if (!d->last_message_id.is_valid() ||
+      (d->last_message_id.get() - max_message_id.get() > max_message_id.get() - d->last_read_inbox_message_id.get())) {
+    int32 unread_count = calc_new_unread_count_from_last_unread(d, max_message_id, type);
+    return unread_count >= 0 ? unread_count
+                             : calc_new_unread_count_from_the_end(d, max_message_id, type, hint_unread_count);
+  } else {
+    int32 unread_count = calc_new_unread_count_from_the_end(d, max_message_id, type, hint_unread_count);
+    return unread_count >= 0 ? unread_count : calc_new_unread_count_from_last_unread(d, max_message_id, type);
+  }
+}
+
 void MessagesManager::read_history_inbox(DialogId dialog_id, MessageId max_message_id, int32 unread_count,
                                          const char *source) {
   if (td_->auth_manager_->is_bot()) {
diff --git a/td/telegram/MessagesManager.h b/td/telegram/MessagesManager.h
index aa37d3f8..23a81646 100644
--- a/td/telegram/MessagesManager.h
+++ b/td/telegram/MessagesManager.h
@@ -2080,6 +2080,11 @@ class MessagesManager : public Actor {
 
   void read_message_contents_on_server(DialogId dialog_id, vector<MessageId> message_ids, uint64 logevent_id);
 
+  static int32 calc_new_unread_count_from_last_unread(Dialog *d, MessageId max_message_id, MessageType type);
+
+  static int32 calc_new_unread_count_from_the_end(Dialog *d, MessageId max_message_id, MessageType type,
+                                                  int32 hint_unread_count);
+
   static int32 calc_new_unread_count(Dialog *d, MessageId max_message_id, MessageType type, int32 hint_unread_count);
 
   void read_history_inbox(DialogId dialog_id, MessageId max_message_id, int32 unread_count, const char *source);