/// <summary>
/// Returns a list of cultures that have any validation errors
/// </summary>
/// <param name="modelState"></param>
/// <param name="localizationService"></param>
/// <param name="cultureForInvariantErrors">The culture to affiliate invariant errors with</param>
/// <returns>
/// A list of cultures that have validation errors. The default culture will be returned for any invariant errors.
/// </returns>
internal static IReadOnlyList <(string culture, string segment)> GetVariantsWithErrors(this System.Web.Http.ModelBinding.ModelStateDictionary modelState, string cultureForInvariantErrors)
{
var propertyVariantErrors = modelState.GetVariantsWithPropertyErrors(cultureForInvariantErrors);
//now check the other special variant errors that are
var genericVariantErrors = modelState.Keys
.Where(x => x.StartsWith("_content_variant_") && x.EndsWith("_"))
.Select(x => x.TrimStart("_content_variant_").TrimEnd("_"))
.Select(x =>
{
// Format "<culture>_<segment>"
var cs = x.Split(new[] { '_' });
return(culture: cs[0], segment: cs[1]);
})
.Where(x => !x.culture.IsNullOrWhiteSpace())
//if it's marked "invariant" than return the default language, this is because we can only edit invariant properties on the default language
//so errors for those must show up under the default lang.
//if the segment is marked "null" then return an actual null
.Select(x =>
{
var culture = x.culture == "invariant" ? cultureForInvariantErrors : x.culture;
var segment = x.segment == "null" ? null : x.segment;
return(culture, segment);
})
.Distinct();
return(propertyVariantErrors.Union(genericVariantErrors).Distinct().ToList());
}