Simplified extracting of calling code from phone number.

Telegram/SourceFiles/countries/countries_instance.cpp

@@ -344,6 +344,9 @@ FormatResult CountriesInstance::format(FormatArgs args) {
 	if (bestCountryPtr == nullptr) {
 		return FormatResult{ .formatted = phoneNumber };
 	}
+	if (args.onlyCode) {
+		return FormatResult{ .code = bestCallingCodePtr->callingCode };
+	}
 
 	const auto codeSize = int(bestCallingCodePtr->callingCode.size());
 
@@ -450,4 +453,8 @@ CountriesInstance &Instance() {
 	return SingleInstance;
 }
 
+QString ExtractPhoneCode(const QString &phone) {
+	return Instance().format({ .phone = phone, .onlyCode = true }).code;
+}
+
 } // namespace Countries

Telegram/SourceFiles/countries/countries_instance.h

@@ -27,6 +27,7 @@ struct Info {
 struct FormatResult {
 	QString formatted;
 	QVector<int> groups;
+	QString code;
 };
 
 struct FormatArgs {
@@ -34,6 +35,7 @@ struct FormatArgs {
 	bool onlyGroups = false;
 	bool skipCode = false;
 	bool incomplete = false;
+	bool onlyCode = false;
 };
 
 class CountriesInstance final {
@@ -63,4 +65,6 @@ private:
 
 CountriesInstance &Instance();
 
+[[nodiscard]] QString ExtractPhoneCode(const QString &phone);
+
 } // namespace Countries