public string Build(string message, object[] messageArgs, string reason, ContextDataItems contextData)
{
string result = SubstituteReasonTag(message, SanitizeReason(reason));
result = SubstituteContextualTags(result, contextData);
result = FormatArgumentPlaceholders(result, messageArgs);
return result;
}
private string SubstituteContextualTags(string message, ContextDataItems contextData)
{
var regex = new Regex(@"\{(?<key>[a-z|A-Z]+)(?:\:(?<default>[a-z|A-Z|\s]+))?\}");
return regex.Replace(message, match =>
{
string key = match.Groups["key"].Value;
return contextData.AsStringOrDefault(key) ?? match.Groups["default"].Value;
});
}
