/**
* Parses a string and fills up the phoneNumber. This method is the same as the public
* parse() method, with the exception that it allows the default region to be null, for use by
* isNumberMatch(). checkRegion should be set to false if it is permitted for the default region
* to be null or unknown ("ZZ").
*/
private void ParseHelper(String numberToParse, String defaultRegion, bool keepRawInput,
bool checkRegion, PhoneNumber.Builder phoneNumber)
{
if (numberToParse == null)
throw new NumberParseException(ErrorType.NOT_A_NUMBER,
"The phone number supplied was null.");
else if (numberToParse.Length > MAX_INPUT_STRING_LENGTH)
throw new NumberParseException(ErrorType.TOO_LONG,
"The string supplied was too long to parse.");
StringBuilder nationalNumber = new StringBuilder();
BuildNationalNumberForParsing(numberToParse, nationalNumber);
if (!IsViablePhoneNumber(nationalNumber.ToString()))
throw new NumberParseException(ErrorType.NOT_A_NUMBER,
"The string supplied did not seem to be a phone number.");
// Check the region supplied is valid, or that the extracted number starts with some sort of +
// sign so the number's region can be determined.
if (checkRegion && !CheckRegionForParsing(nationalNumber.ToString(), defaultRegion))
throw new NumberParseException(ErrorType.INVALID_COUNTRY_CODE,
"Missing or invalid default region.");
if (keepRawInput)
phoneNumber.SetRawInput(numberToParse);
// Attempt to parse extension first, since it doesn't require region-specific data and we want
// to have the non-normalised number here.
String extension = MaybeStripExtension(nationalNumber);
if (extension.Length > 0)
phoneNumber.SetExtension(extension);
PhoneMetadata regionMetadata = GetMetadataForRegion(defaultRegion);
// Check to see if the number is given in international format so we know whether this number is
// from the default region or not.
StringBuilder normalizedNationalNumber = new StringBuilder();
int countryCode = 0;
try
{
// TODO: This method should really just take in the string buffer that has already
// been created, and just remove the prefix, rather than taking in a string and then
// outputting a string buffer.
countryCode = MaybeExtractCountryCode(nationalNumber.ToString(), regionMetadata,
normalizedNationalNumber, keepRawInput, phoneNumber);
}
catch (NumberParseException e)
{
var m = PLUS_CHARS_PATTERN.MatchBeginning(nationalNumber.ToString());
if (e.ErrorType == ErrorType.INVALID_COUNTRY_CODE &&
m.Success)
{
// Strip the plus-char, and try again.
countryCode = MaybeExtractCountryCode(
nationalNumber.ToString().Substring(m.Index + m.Length),
regionMetadata, normalizedNationalNumber,
keepRawInput, phoneNumber);
if (countryCode == 0)
{
throw new NumberParseException(ErrorType.INVALID_COUNTRY_CODE,
"Could not interpret numbers after plus-sign.");
}
}
else
{
throw new NumberParseException(e.ErrorType, e.Message);
}
}
if (countryCode != 0)
{
String phoneNumberRegion = GetRegionCodeForCountryCode(countryCode);
if (phoneNumberRegion != defaultRegion)
regionMetadata = GetMetadataForRegionOrCallingCode(countryCode, phoneNumberRegion);
}
else
{
// If no extracted country calling code, use the region supplied instead. The national number
// is just the normalized version of the number we were given to parse.
Normalize(nationalNumber);
normalizedNationalNumber.Append(nationalNumber);
if (defaultRegion != null)
{
countryCode = regionMetadata.CountryCode;
phoneNumber.SetCountryCode(countryCode);
}
else if (keepRawInput)
{
phoneNumber.ClearCountryCode();
}
}
if (normalizedNationalNumber.Length < MIN_LENGTH_FOR_NSN)
throw new NumberParseException(ErrorType.TOO_SHORT_NSN,
"The string supplied is too short to be a phone number.");
if (regionMetadata != null)
{
StringBuilder carrierCode = new StringBuilder();
MaybeStripNationalPrefixAndCarrierCode(normalizedNationalNumber, regionMetadata, carrierCode);
if (keepRawInput)
phoneNumber.SetPreferredDomesticCarrierCode(carrierCode.ToString());
}
int lengthOfNationalNumber = normalizedNationalNumber.Length;
if (lengthOfNationalNumber < MIN_LENGTH_FOR_NSN)
throw new NumberParseException(ErrorType.TOO_SHORT_NSN,
"The string supplied is too short to be a phone number.");
if (lengthOfNationalNumber > MAX_LENGTH_FOR_NSN)
throw new NumberParseException(ErrorType.TOO_LONG,
"The string supplied is too long to be a phone number.");
if (normalizedNationalNumber[0] == '0')
phoneNumber.SetItalianLeadingZero(true);
phoneNumber.SetNationalNumber(ulong.Parse(normalizedNationalNumber.ToString()));
}
/**
* Attempts to extract a valid number from a phone number that is too long to be valid, and resets
* the PhoneNumber object passed in to that valid version. If no valid number could be extracted,
* the PhoneNumber object passed in will not be modified.
* @param number a PhoneNumber object which contains a number that is too long to be valid.
* @return true if a valid phone number can be successfully extracted.
*/
public bool TruncateTooLongNumber(PhoneNumber.Builder number)
{
if (IsValidNumber(number.Clone().Build()))
return true;
PhoneNumber copy = null;
ulong nationalNumber = number.NationalNumber;
do
{
nationalNumber /= 10;
PhoneNumber.Builder numberCopy = number.Clone();
numberCopy.SetNationalNumber(nationalNumber);
copy = numberCopy.Build();
if (IsPossibleNumberWithReason(copy) == ValidationResult.TOO_SHORT ||
nationalNumber == 0)
return false;
}
while (!IsValidNumber(copy));
number.SetNationalNumber(nationalNumber);
return true;
}