///<summary>Constructor method to parse a valid RFC5646 tag as a string
///</summary>
///<param name="inputString">valid RFC5646 string</param>
///<returns>RFC5646Tag object</returns>
public static RFC5646Tag Parse(string inputString)
{
var tokens = inputString.Split(new[] { '-' });
var rfc5646Tag = new RFC5646Tag();
bool haveX = false;
for (int position = 0; position < tokens.Length; ++position)
{
var token = tokens[position];
if (token == "x")
{
haveX = true;
continue;
}
if (haveX)
{
//This is the case for RfcTags consisting only of a private use subtag
if (position == 1)
{
rfc5646Tag = new RFC5646Tag(String.Empty, String.Empty, String.Empty, String.Empty, token);
continue;
}
rfc5646Tag.AddToPrivateUse(token);
continue;
}
if (position == 0)
{
rfc5646Tag.Language = token;
continue;
}
if (position <= 1 && StandardTags.IsValidIso15924ScriptCode(token))
{
rfc5646Tag.Script = token;
continue;
}
if (position <= 2 && StandardTags.IsValidIso3166Region(token))
{
rfc5646Tag.Region = token;
continue;
}
if (StandardTags.IsValidRegisteredVariant(token))
{
rfc5646Tag.AddToVariant(token);
continue;
}
throw new ValidationException(String.Format("The RFC tag '{0}' could not be parsed.", inputString));
}
return(rfc5646Tag);
}
private void ValidateScript()
{
if (String.IsNullOrEmpty(_script))
{
return;
}
if (_script.Contains("-"))
{
throw new ValidationException("The script tag may not contain dashes or underscores. I.e. there may only be a single iso 639 tag in this subtag");
}
if (!StandardTags.IsValidIso15924ScriptCode(_script))
{
throw new ValidationException(String.Format("'{0}' is not a valid ISO-15924 script code.", _script));
}
}
public void ConvertToPalasoConformPrivateUseRfc5646Tag(string flexConformPrivateUseRfc5646Tag)
{
string language = String.Empty;
string script = String.Empty;
string region = String.Empty;
string variant = String.Empty;
string privateUse = String.Empty;
var tokens = flexConformPrivateUseRfc5646Tag.Split(new[] { '-' });
for (int position = 0; position < tokens.Length; ++position)
{
string currentToken = tokens[position];
if (position == 0)
{
if (!currentToken.Equals("x", StringComparison.OrdinalIgnoreCase))
{
throw new ValidationException(String.Format("The rfctag {0} does not start with 'x-' or 'X-'.",
flexConformPrivateUseRfc5646Tag));
}
language = currentToken;
}
else if (position == 1 && !StandardTags.IsValidIso15924ScriptCode(currentToken))
{
language = language + '-' + currentToken;
continue;
}
else if (StandardTags.IsValidIso15924ScriptCode(currentToken))
{
if (!String.IsNullOrEmpty(region) || !String.IsNullOrEmpty(variant))
{
throw new ValidationException(
String.Format(
"The rfctag '{0}' contains a misplaced Script subtag (i.e. it was preceded by a region or variant subtag.",
flexConformPrivateUseRfc5646Tag));
}
script = currentToken;
}
else if (StandardTags.IsValidIso3166Region(currentToken))
{
if (!String.IsNullOrEmpty(variant))
{
throw new ValidationException(
String.Format(
"The rfctag '{0}' contains a misplaced Region subtag (i.e. it was preceded by a variant subtag.",
flexConformPrivateUseRfc5646Tag));
}
region = currentToken;
}
else if (StandardTags.IsValidRegisteredVariant(currentToken))
{
variant = variant + currentToken;
}
else
{
privateUse = String.IsNullOrEmpty(privateUse) ? currentToken : privateUse + '-' + currentToken;
}
}
variant = WritingSystemDefinition.ConcatenateVariantAndPrivateUse(variant, privateUse);
ConvertToPalasoConformPrivateUseRfc5646Tag(language, script, region, variant);
}