public LinkValue AddLinkParam(
LinkParam param)
{
if (param == null)
{
return(this);
}
switch (param.Kind)
{
case LinkParamKind.Rel:
RelationType ??= LinkRelationType.Parse(param.Value);
break;
case LinkParamKind.Anchor:
Anchor ??= param.Value;
break;
case LinkParamKind.HrefLang:
case LinkParamKind.Media:
case LinkParamKind.Title:
case LinkParamKind.Type:
case LinkParamKind.Extension:
_targetAttributes.Add(param);
break;
default:
throw new InvalidOperationException(
"Link param kind is not supported");
}
return(this);
}
public static LinkParam Parse(
string parameter)
{
if (string.IsNullOrWhiteSpace(parameter))
{
return(null);
}
var match = ParamRegex.Match(parameter);
if (!match.Success ||
!match.Groups[GroupNameKey]
.Success)
{
return(null);
}
var key = match.Groups[GroupNameKey]
.Value
.Trim()
.ToLowerInvariant();
var result = new LinkParam
{
Key = key.Replace(
"*",
string.Empty),
IsExtendedParameter = key.EndsWith("*"),
};
if (match.Groups[GroupNameValue]
.Success)
{
result.Value = match.Groups[GroupNameValue]
.Value.Trim();
}
else if (match.Groups[GroupNameValueUrlEncoded]
.Success)
{
result.Value = WebUtility.UrlDecode(
match.Groups[GroupNameValueUrlEncoded]
.Value.Trim());
}
return(result);
}
public static LinkValue Parse(
string linkValue)
{
if (string.IsNullOrWhiteSpace(linkValue))
{
return(null);
}
var parts = linkValue.Split(
new[] { ';' },
StringSplitOptions.RemoveEmptyEntries);
var targetUri = ParseTargetUri(
parts[0]
.Trim());
if (targetUri == null)
{
return(null);
}
var result = new LinkValue
{
TargetUri = targetUri,
};
for (var i = 1;
i < parts.Length;
i++)
{
var param = LinkParam.Parse(
parts[i]
.Trim());
result.AddLinkParam(param);
}
return(result);
}