Method format

Telegram/SourceFiles/countries/countries_instance.cpp:341–514

}

FormatResult CountriesInstance::format(FormatArgs args) const {
	// Ported from TDLib.
	if (args.phone.isEmpty()) {
		return FormatResult();
	}
	const auto &phoneNumber = args.phone;

	const Info *bestCountryPtr = nullptr;
	const CallingCodeInfo *bestCallingCodePtr = nullptr;
	auto bestLength = size_t(0);
	[[maybe_unused]] auto isPrefix = false;
	for (const auto &country : list()) {
		for (auto &callingCode : country.codes) {
			if (phoneNumber.startsWith(callingCode.callingCode)) {
				const auto codeSize = callingCode.callingCode.size();
				for (const auto &prefix : callingCode.prefixes) {
					if (prefix.startsWith(base::StringViewMid(phoneNumber, codeSize))) {
						isPrefix = true;
					}
					if ((codeSize + prefix.size()) > bestLength &&
							base::StringViewMid(phoneNumber, codeSize).startsWith(prefix)) {
						bestCountryPtr = &country;
						bestCallingCodePtr = &callingCode;
						bestLength = codeSize + prefix.size();
					}
				}
			}
			if (callingCode.callingCode.startsWith(phoneNumber)) {
				isPrefix = true;
			}
		}
	}
	if (bestCountryPtr == nullptr) {
		return FormatResult{ .formatted = phoneNumber };
	}
	if (args.onlyCode) {
		return FormatResult{ .code = bestCallingCodePtr->callingCode };
	}

	const auto codeSize = int(bestCallingCodePtr->callingCode.size());

	if (args.onlyGroups && args.incomplete) {
		auto initialGroups = args.skipCode
			? QVector<int>()
			: QVector<int>{ codeSize };
		auto initialGroupsSize = 0;
		if (bestCallingCodePtr->patterns.empty()) {
			return FormatResult{ .groups = std::move(initialGroups) };
		}
		auto bestGroups = initialGroups;
		auto bestGroupsSize = initialGroupsSize;
		auto bestPatternMaxMatches = -1;
		for (const auto &pattern : bestCallingCodePtr->patterns) {
			auto groups = initialGroups;
			auto groupSize = initialGroupsSize;
			auto lastSpacesCount = 0;
			auto maxMatchedDigits = 0;
			auto isNotBestPattern = false;