From d3a82b449c942bb7257b2153233fefc7844b4a7e Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Tue, 12 Mar 2019 11:58:37 +0300
Subject: [PATCH] Update channel member count when receive member list.

GitOrigin-RevId: 6f5b2f90cbf0085b7ff68f80bf0529fbf3dc1bf3
---
 td/telegram/ContactsManager.cpp | 14 ++++++++++++++
 td/telegram/DialogParticipant.h |  4 ++++
 2 files changed, 18 insertions(+)

diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index f6711822b..16ca953d9 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -7441,6 +7441,20 @@ void ContactsManager::on_get_channel_participants_success(
     result.push_back(get_dialog_participant(channel_id, std::move(participant_ptr)));
   }
 
+  if (filter.is_recent() && total_count != 0 && total_count < 10000) {
+    auto channel_full = get_channel_full(channel_id);
+    if (channel_full != nullptr && channel_full->participant_count != total_count) {
+      channel_full->participant_count = total_count;
+      channel_full->is_changed = true;
+      update_channel_full(channel_full, channel_id);
+    }
+    auto c = get_channel(channel_id);
+    if (c != nullptr && c->participant_count != total_count) {
+      c->participant_count = total_count;
+      c->need_send_update = true;
+      update_channel(c, channel_id);
+    }
+  }
   if (offset == 0 && static_cast<int32>(participants.size()) < limit) {
     if (filter.is_administrators() || filter.is_bots()) {
       auto user_ids = transform(result, [](const DialogParticipant &participant) { return participant.user_id; });
diff --git a/td/telegram/DialogParticipant.h b/td/telegram/DialogParticipant.h
index db4bc4142..c2e188fc4 100644
--- a/td/telegram/DialogParticipant.h
+++ b/td/telegram/DialogParticipant.h
@@ -262,6 +262,10 @@ class ChannelParticipantsFilter {
   bool is_bots() const {
     return type == Type::Bots;
   }
+
+  bool is_recent() const {
+    return type == Type::Recent;
+  }
 };
 
 enum class DialogParticipantsFilter : int32 { Administrators, Members, Restricted, Banned, Bots };