Match animated emoji without selectors.

td/telegram/StickersManager.cpp

@@ -2004,26 +2004,31 @@ std::pair<FileId, int> StickersManager::get_animated_emoji_sticker(const Sticker
     return {};
   }
 
+  auto emoji_without_selectors = remove_emoji_selectors(emoji);
   // trying to find full emoji match
   for (const auto &sticker_id : it->second) {
     auto emoji_it = sticker_set->sticker_emojis_map_.find(sticker_id);
     CHECK(emoji_it != sticker_set->sticker_emojis_map_.end());
-    if (td::contains(emoji_it->second, emoji)) {
+    for (auto &sticker_emoji : emoji_it->second) {
+      if (remove_emoji_selectors(sticker_emoji) == emoji_without_selectors) {
         return {sticker_id, 0};
       }
     }
+  }
 
   // trying to find match without Fitzpatrick modifiers
-  int modifier_id = get_fitzpatrick_modifier(emoji);
+  int modifier_id = get_fitzpatrick_modifier(emoji_without_selectors);
   if (modifier_id > 0) {
     for (const auto &sticker_id : it->second) {
       auto emoji_it = sticker_set->sticker_emojis_map_.find(sticker_id);
       CHECK(emoji_it != sticker_set->sticker_emojis_map_.end());
-      if (td::contains(emoji_it->second, Slice(emoji).remove_suffix(4))) {
+      for (auto &sticker_emoji : emoji_it->second) {
+        if (remove_emoji_selectors(sticker_emoji) == Slice(emoji_without_selectors).remove_suffix(4)) {
           return {sticker_id, modifier_id};
         }
       }
     }
+  }
 
   // there is no match
   return {};

tdutils/td/utils/emoji.cpp

@@ -688,8 +688,7 @@ Slice remove_fitzpatrick_modifier(Slice emoji) {
 }
 
 Slice remove_emoji_modifiers(Slice emoji) {
-  static const Slice modifiers[] = {u8"\uFE0E" /* variation selector-15 */,
-                                    u8"\uFE0F" /* variation selector-16 */,
+  static const Slice modifiers[] = {u8"\uFE0F" /* variation selector-16 */,
                                     u8"\u200D\u2640" /* zero width joiner + female sign */,
                                     u8"\u200D\u2642" /* zero width joiner + male sign */,
                                     u8"\U0001F3FB" /* emoji modifier fitzpatrick type-1-2 */,
@@ -714,4 +713,21 @@ void remove_emoji_modifiers_in_place(string &emoji) {
   emoji.resize(remove_emoji_modifiers(emoji).size());
 }
 
+string remove_emoji_selectors(Slice emoji) {
+  if (!is_emoji(emoji)) {
+    return emoji.str();
+  }
+  string str;
+  for (size_t i = 0; i < emoji.size(); i++) {
+    if (i + 3 <= emoji.size() && emoji[i] == '\xEF' && emoji[i + 1] == '\xB8' && emoji[i + 2] == '\x8F') {
+      // skip \uFE0F
+      i += 2;
+    } else {
+      str += emoji[i];
+    }
+  }
+  CHECK(is_emoji(str));
+  return str;
+}
+
 }  // namespace td

tdutils/td/utils/emoji.h

@@ -26,4 +26,7 @@ Slice remove_emoji_modifiers(Slice emoji);
 // removes all emoji modifiers from the end of the string in place
 void remove_emoji_modifiers_in_place(string &emoji);
 
+// removes all emoji selectors from the string if it is an emoji
+string remove_emoji_selectors(Slice emoji);
+
 }  // namespace td