From f702cad110dc5f4081946fdb8a7d806f4a868822 Mon Sep 17 00:00:00 2001
From: levlam <levlam@telegram.org>
Date: Fri, 4 Nov 2022 00:59:45 +0300
Subject: [PATCH] Wait for emoji reactions to be loaded once in
 getEmojiReaction.

---
 td/telegram/StickersManager.cpp | 13 +++++++++++++
 td/telegram/StickersManager.h   |  2 ++
 2 files changed, 15 insertions(+)

diff --git a/td/telegram/StickersManager.cpp b/td/telegram/StickersManager.cpp
index 8953aaebf..93fbc6f2d 100644
--- a/td/telegram/StickersManager.cpp
+++ b/td/telegram/StickersManager.cpp
@@ -55,6 +55,7 @@
 #include "td/utils/misc.h"
 #include "td/utils/PathView.h"
 #include "td/utils/Random.h"
+#include "td/utils/ScopeGuard.h"
 #include "td/utils/Slice.h"
 #include "td/utils/SliceBuilder.h"
 #include "td/utils/StackAllocator.h"
@@ -1580,6 +1581,10 @@ td_api::object_ptr<td_api::emojiReaction> StickersManager::get_emoji_reaction_ob
 void StickersManager::get_emoji_reaction(const string &emoji,
                                          Promise<td_api::object_ptr<td_api::emojiReaction>> &&promise) {
   load_reactions();
+  if (reactions_.reactions_.empty() && reactions_.are_being_reloaded_) {
+    pending_get_emoji_reaction_queries_.emplace_back(emoji, std::move(promise));
+    return;
+  }
   promise.set_value(get_emoji_reaction_object(emoji));
 }
 
@@ -4004,6 +4009,14 @@ void StickersManager::on_get_available_reactions(
   CHECK(reactions_.are_being_reloaded_);
   reactions_.are_being_reloaded_ = false;
 
+  auto get_emoji_reaction_queries = std::move(pending_get_emoji_reaction_queries_);
+  pending_get_emoji_reaction_queries_.clear();
+  SCOPE_EXIT {
+    for (auto &query : get_emoji_reaction_queries) {
+      query.second.set_value(get_emoji_reaction_object(query.first));
+    }
+  };
+
   if (available_reactions_ptr == nullptr) {
     // failed to get available reactions
     return;
diff --git a/td/telegram/StickersManager.h b/td/telegram/StickersManager.h
index f666fe735..8ad65608f 100644
--- a/td/telegram/StickersManager.h
+++ b/td/telegram/StickersManager.h
@@ -1052,6 +1052,8 @@ class StickersManager final : public Actor {
   vector<Promise<Unit>> pending_get_default_statuses_queries_;
   vector<Promise<Unit>> pending_get_default_topic_icons_queries_;
 
+  vector<std::pair<string, Promise<td_api::object_ptr<td_api::emojiReaction>>>> pending_get_emoji_reaction_queries_;
+
   double next_click_animated_emoji_message_time_ = 0;
   double next_update_animated_emoji_clicked_time_ = 0;
   vector<PendingGetAnimatedEmojiClickSticker> pending_get_animated_emoji_click_stickers_;