Method documentConvert

Telegram/SourceFiles/data/data_session.cpp:3780–3815

}

void Session::documentConvert(
		not_null<DocumentData*> original,
		const MTPDocument &data) {
	const auto id = data.match([](const auto &data) {
		return data.vid().v;
	});
	const auto oldCacheKey = original->cacheKey();
	const auto oldGoodKey = original->goodThumbnailCacheKey();
	const auto idChanged = (original->id != id);
	if (idChanged) {
		auto i = _documents.find(id);
		if (i == _documents.end()) {
			const auto j = _documents.find(original->id);
			Assert(j != _documents.end());
			auto owned = std::move(j->second);
			_documents.erase(j);
			i = _documents.emplace(id, std::move(owned)).first;
		}

		original->id = id;
		original->status = FileReady;
		original->uploadingData = nullptr;

		if (i->second.get() != original) {
			documentApplyFields(i->second.get(), data);
		}
	}
	documentApplyFields(original, data);
	if (idChanged) {
		cache().moveIfEmpty(oldCacheKey, original->cacheKey());
		cache().moveIfEmpty(oldGoodKey, original->goodThumbnailCacheKey());
		if (stickers().savedGifs().indexOf(original) >= 0) {
			_session->local().writeSavedGifs();
		}
	}
}

DocumentData *Session::documentFromWeb(
		const MTPWebDocument &data,