private static string GetLanguageSpecificAttribute(XRefSpec spec, string language, params string[] keyInFallbackOrder)
{
if (keyInFallbackOrder == null || keyInFallbackOrder.Length == 0)
{
throw new ArgumentException("key must be provided!", nameof(keyInFallbackOrder));
}
string suffix = string.Empty;
if (!string.IsNullOrEmpty(language))
{
suffix = "." + language;
}
foreach (var key in keyInFallbackOrder)
{
var keyWithSuffix = key + suffix;
if (spec.TryGetXrefStringValue(keyWithSuffix, out var suffixedValue))
{
return(suffixedValue);
}
if (spec.TryGetXrefStringValue(key, out var value))
{
return(value);
}
}
return(null);
}
