func IsNumberMatchWithNumbers()

in phonenumbers.go [3137:3202]
46 lines of code
13 McCabe index (conditional complexity)

func IsNumberMatchWithNumbers(firstNumberIn, secondNumberIn *PhoneNumber) MatchType {
	// Make copies of the phone number so that the numbers passed in are not edited.
	var firstNumber, secondNumber *PhoneNumber
	firstNumber = &PhoneNumber{}
	secondNumber = &PhoneNumber{}
	proto.Merge(firstNumber, firstNumberIn)
	proto.Merge(secondNumber, secondNumberIn)
	// First clear raw_input, country_code_source and
	// preferred_domestic_carrier_code fields and any empty-string
	// extensions so that we can use the proto-buffer equality method.
	firstNumber.RawInput = nil
	firstNumber.CountryCodeSource = nil
	firstNumber.PreferredDomesticCarrierCode = nil
	secondNumber.RawInput = nil
	secondNumber.CountryCodeSource = nil
	secondNumber.PreferredDomesticCarrierCode = nil

	firstNumExt := firstNumber.GetExtension()
	secondNumExt := secondNumber.GetExtension()
	// NOTE(ttacon): don't think we need this in go land...
	if len(firstNumExt) == 0 {
		firstNumber.Extension = nil
	}
	if len(secondNumExt) == 0 {
		secondNumber.Extension = nil
	}

	// Early exit if both had extensions and these are different.
	if len(firstNumExt) > 0 && len(secondNumExt) > 0 &&
		firstNumExt != secondNumExt {
		return NO_MATCH
	}
	var (
		firstNumberCountryCode  = firstNumber.GetCountryCode()
		secondNumberCountryCode = secondNumber.GetCountryCode()
	)
	// Both had country_code specified.
	if firstNumberCountryCode != 0 && secondNumberCountryCode != 0 {
		// TODO(ttacon): remove when make gen-equals
		if reflect.DeepEqual(firstNumber, secondNumber) {
			return EXACT_MATCH
		} else if firstNumberCountryCode == secondNumberCountryCode &&
			isNationalNumberSuffixOfTheOther(firstNumber, secondNumber) {
			// A SHORT_NSN_MATCH occurs if there is a difference because of
			// the presence or absence of an 'Italian leading zero', the
			// presence or absence of an extension, or one NSN being a
			// shorter variant of the other.
			return SHORT_NSN_MATCH
		}
		// This is not a match.
		return NO_MATCH
	}
	// Checks cases where one or both country_code fields were not
	// specified. To make equality checks easier, we first set the
	// country_code fields to be equal.
	firstNumber.CountryCode = proto.Int32(secondNumberCountryCode)
	// If all else was the same, then this is an NSN_MATCH.
	// TODO(ttacon): remove when make gen-equals
	if reflect.DeepEqual(firstNumber, secondNumber) {
		return NSN_MATCH
	}
	if isNationalNumberSuffixOfTheOther(firstNumber, secondNumber) {
		return SHORT_NSN_MATCH
	}
	return NO_MATCH
}