From 08d6b880e0415783c3d94a3e9486d34cfcc38d57 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Thu, 17 Oct 2019 21:35:32 +0300
Subject: [PATCH] Send updateUsersNearby only if users_nearby_ really has
 changed.

GitOrigin-RevId: cfa8800259ba03c0cfcad357ed4afe6a0bf5bb27
---
 td/telegram/ContactsManager.cpp | 5 ++++-
 td/telegram/ContactsManager.h   | 8 ++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index aa95de79a..1ef10a96d 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -4664,6 +4664,7 @@ void ContactsManager::on_get_dialogs_nearby(Result<tl_object_ptr<telegram_api::U
   for (auto &dialog_nearby : users_nearby_) {
     user_nearby_timeout_.cancel_timeout(dialog_nearby.dialog_id.get_user_id().get());
   }
+  auto old_users_nearby = std::move(users_nearby_);
   users_nearby_.clear();
   channels_nearby_.clear();
   for (auto &update_ptr : update->updates_) {
@@ -4676,9 +4677,11 @@ void ContactsManager::on_get_dialogs_nearby(Result<tl_object_ptr<telegram_api::U
   }
 
   std::sort(users_nearby_.begin(), users_nearby_.end());
+  if (old_users_nearby != users_nearby_) {
+    send_update_users_nearby();  // for other clients connected to the same TDLib instance
+  }
   promise.set_value(td_api::make_object<td_api::chatsNearby>(get_chats_nearby_object(users_nearby_),
                                                              get_chats_nearby_object(channels_nearby_)));
-  send_update_users_nearby();  // for other clients connected to the same TDLib instance
 }
 
 void ContactsManager::on_update_peer_located(vector<tl_object_ptr<telegram_api::peerLocated>> &&peers,
diff --git a/td/telegram/ContactsManager.h b/td/telegram/ContactsManager.h
index 4c53e08e5..e660b6e6d 100644
--- a/td/telegram/ContactsManager.h
+++ b/td/telegram/ContactsManager.h
@@ -813,6 +813,14 @@ class ContactsManager : public Actor {
     bool operator<(const DialogNearby &other) const {
       return distance < other.distance || (distance == other.distance && dialog_id.get() < other.dialog_id.get());
     }
+
+    bool operator==(const DialogNearby &other) const {
+      return distance == other.distance && dialog_id == other.dialog_id;
+    }
+
+    bool operator!=(const DialogNearby &other) const {
+      return !(*this == other);
+    }
   };
 
   class UserLogEvent;