func IsNumberMatchWithOneNumber()

in phonenumbers.go [3251:3290]
31 lines of code
7 McCabe index (conditional complexity)

func IsNumberMatchWithOneNumber(
	firstNumber *PhoneNumber, secondNumber string) MatchType {
	// First see if the second number has an implicit country calling
	// code, by attempting to parse it.
	secondNumberAsProto, err := Parse(secondNumber, UNKNOWN_REGION)
	if err == nil {
		return IsNumberMatchWithNumbers(firstNumber, secondNumberAsProto)
	}
	if err != ErrInvalidCountryCode {
		return NOT_A_NUMBER
	}
	// The second number has no country calling code. EXACT_MATCH is no
	// longer possible. We parse it as if the region was the same as that
	// for the first number, and if EXACT_MATCH is returned, we replace
	// this with NSN_MATCH.
	firstNumberRegion := GetRegionCodeForCountryCode(int(firstNumber.GetCountryCode()))

	if firstNumberRegion != UNKNOWN_REGION {
		secondNumberWithFirstNumberRegion, err :=
			Parse(secondNumber, firstNumberRegion)
		if err != nil {
			return NOT_A_NUMBER
		}
		match := IsNumberMatchWithNumbers(
			firstNumber, secondNumberWithFirstNumberRegion)
		if match == EXACT_MATCH {
			return NSN_MATCH
		}
		return match
	} else {
		// If the first number didn't have a valid country calling
		// code, then we parse the second number without one as well.
		var secondNumberProto *PhoneNumber
		err := parseHelper(secondNumber, "", false, false, secondNumberProto)
		if err != nil {
			return NOT_A_NUMBER
		}
		return IsNumberMatchWithNumbers(firstNumber, secondNumberProto)
	}
}