/// <summary>
/// Extracts the subscriber number
/// </summary>
/// <param name="parser">An instance of type <see cref="PhoneNumberUtil"/> to parse</param>
/// <param name="parsedNumber">An instance of type <see cref="PhoneNumber"/> representing the parsed number</param>
/// <returns>The subscriber number as <see cref="string"/></returns>
private string GetSubscriberNumber(PhoneNumberUtil parser, PhoneNumber parsedNumber)
{
// Get the national relevant number and the length of the area code
string nationalNumber = parser.GetNationalSignificantNumber(parsedNumber);
int areaCodeLength = parser.GetLengthOfGeographicalAreaCode(parsedNumber);
// Get the substring of the national relevant number from the index of the length of the area code
string subscriberNumber = nationalNumber.Substring(areaCodeLength);
return(subscriberNumber);
}
/// <summary>
/// Retrieves the area code of parsed number
/// </summary>
/// <param name="parser">An instance of type <see cref="PhoneNumberUtil"/> representing the parser</param>
/// <param name="parsedNumber">An instance of type <see cref="PhoneNumber"/> representing the parsed number</param>
/// <param name="number">The raw number as <see cref="string"/></param>
/// <returns></returns>
private string GetAreaCode(PhoneNumberUtil parser, PhoneNumber parsedNumber, string number)
{
string areaCode;
// Get length of area code and the national relevant part of the number
int areaCodeLength = parser.GetLengthOfGeographicalAreaCode(parsedNumber);
string nationalNumber = parser.GetNationalSignificantNumber(parsedNumber);
// Check if the number starts with "0"
if (number.StartsWith("0"))
{
// Get the area code which starts with a "0"
areaCode = $"0{nationalNumber.Substring(0, areaCodeLength)}";
}
else
{
// Get the area code which does not start with a "0"
areaCode = nationalNumber.Substring(0, areaCodeLength);
}
return(areaCode);
}