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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.ComponentModel.DataAnnotations;
using System.Linq;
using Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
using Microsoft.Extensions.Localization;
namespace Microsoft.AspNetCore.Mvc.DataAnnotations;
internal sealed class FileExtensionsAttributeAdapter : AttributeAdapterBase<FileExtensionsAttribute>
{
private readonly string _extensions;
private readonly string _formattedExtensions;
public FileExtensionsAttributeAdapter(FileExtensionsAttribute attribute, IStringLocalizer? stringLocalizer)
: base(attribute, stringLocalizer)
{
// Build the extension list based on how the JQuery Validation's 'extension' method expects it
// https://jqueryvalidation.org/extension-method/
// These lines follow the same approach as the FileExtensionsAttribute.
var normalizedExtensions = Attribute.Extensions.Replace(" ", string.Empty).Replace(".", string.Empty).ToLowerInvariant();
var parsedExtensions = normalizedExtensions.Split(',').Select(e => "." + e);
_formattedExtensions = string.Join(", ", parsedExtensions);
_extensions = string.Join(",", parsedExtensions);
}
/// <inheritdoc />
public override void AddValidation(ClientModelValidationContext context)
{
ArgumentNullException.ThrowIfNull(context);
MergeAttribute(context.Attributes, "data-val", "true");
MergeAttribute(context.Attributes, "data-val-fileextensions", GetErrorMessage(context));
MergeAttribute(context.Attributes, "data-val-fileextensions-extensions", _extensions);
}
/// <inheritdoc />
public override string GetErrorMessage(ModelValidationContextBase validationContext)
{
ArgumentNullException.ThrowIfNull(validationContext);
return GetErrorMessage(
validationContext.ModelMetadata,
validationContext.ModelMetadata.GetDisplayName(),
_formattedExtensions);
}
}
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