aspnetcore/src/Microsoft.AspNetCore.Razor.Language/BoundAttributeDescriptorExtensions.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;

namespace Microsoft.AspNetCore.Razor.Language
{
    public static class BoundAttributeDescriptorExtensions
    {
        public static string GetPropertyName(this BoundAttributeDescriptor attribute)
        {
            if (attribute == null)
            {
                throw new ArgumentNullException(nameof(attribute));
            }

            attribute.Metadata.TryGetValue(TagHelperMetadata.Common.PropertyName, out var propertyName);
            return propertyName;
        }

        public static bool IsDefaultKind(this BoundAttributeDescriptor attribute)
        {
            if (attribute == null)
            {
                throw new ArgumentNullException(nameof(attribute));
            }

            return string.Equals(attribute.Kind, TagHelperConventions.DefaultKind, StringComparison.Ordinal);
        }

        internal static bool ExpectsStringValue(this BoundAttributeDescriptor attribute, string name)
        {
            if (attribute.IsStringProperty)
            {
                return true;
            }

            var isIndexerNameMatch = TagHelperMatchingConventions.SatisfiesBoundAttributeIndexer(name, attribute);
            return isIndexerNameMatch && attribute.IsIndexerStringProperty;
        }

        internal static bool ExpectsBooleanValue(this BoundAttributeDescriptor attribute, string name)
        {
            if (attribute.IsBooleanProperty)
            {
                return true;
            }

            var isIndexerNameMatch = TagHelperMatchingConventions.SatisfiesBoundAttributeIndexer(name, attribute);
            return isIndexerNameMatch && attribute.IsIndexerBooleanProperty;
        }
    }
}