// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.AspNetCore.Razor.Language;
using Microsoft.AspNetCore.Razor.PooledObjects;
 
namespace Microsoft.CodeAnalysis.Razor.Workspaces;
 
internal static class TagHelperDescriptorExtensions
{
    public static bool IsAttributeDescriptor(this TagHelperDescriptor descriptor)
        => descriptor.ClassifyAttributesOnly;
 
    public static string? TryGetComponentTag(this TagHelperDescriptor descriptor)
    {
        var typeName = descriptor.TypeNameIdentifier;
        if (string.IsNullOrWhiteSpace(typeName))
        {
            return null;
        }
 
        // TODO: Add @using statements if required, or fully qualify (GetTypeName())
 
        using var _ = StringBuilderPool.GetPooledObject(out var builder);
 
        builder.Append('<');
        builder.Append(typeName);
 
        foreach (var requiredAttribute in descriptor.EditorRequiredAttributes)
        {
            builder.Append(' ');
            builder.Append(requiredAttribute.Name);
            builder.Append("=\"\"");
        }
 
        if (descriptor.AllowedChildTags.Length > 0)
        {
            builder.Append("></");
            builder.Append(typeName);
            builder.Append('>');
        }
        else
        {
            builder.Append(" />");
        }
 
        return builder.ToString();
    }
}