Method remove

Telegram/SourceFiles/data/data_message_reactions.cpp:2004–2045

}

void MessageReactions::remove(const ReactionId &id) {
	Expects(!id.paid());

	const auto history = _item->history();
	const auto self = history->session().user();
	const auto i = ranges::find(_list, id, &MessageReaction::id);
	const auto j = _recent.find(id);
	if (i == end(_list)) {
		Assert(j == end(_recent));
		return;
	} else if (!i->my) {
		Assert(j == end(_recent)
			|| !ranges::contains(j->second, self, &RecentReaction::peer));
		return;
	}
	i->my = false;
	const auto tags = _item->reactionsAreTags();
	const auto removed = !--i->count;
	if (removed) {
		_list.erase(i);
	}
	if (j != end(_recent)) {
		if (removed) {
			j->second.clear();
			_recent.erase(j);
		} else {
			j->second.erase(
				ranges::remove(j->second, true, &RecentReaction::my),
				end(j->second));
			if (j->second.empty()) {
				_recent.erase(j);
			}
		}
	}
	if (tags) {
		const auto sublist = _item->savedSublist();
		history->owner().reactions().decrementMyTag(id, sublist);
	}
	auto &owner = history->owner();
	owner.reactions().send(_item, false);
	owner.notifyItemDataChange(_item);
}

bool MessageReactions::removeFromParticipant(
		not_null<PeerData*> participant,