|
// 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.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.Extensions.Options;
namespace Microsoft.AspNetCore.Mvc.ViewFeatures;
/// <summary>
/// Default implementation of <see cref="ValidationHtmlAttributeProvider"/>.
/// </summary>
public class DefaultValidationHtmlAttributeProvider : ValidationHtmlAttributeProvider
{
private readonly IModelMetadataProvider _metadataProvider;
private readonly ClientValidatorCache _clientValidatorCache;
private readonly IClientModelValidatorProvider _clientModelValidatorProvider;
/// <summary>
/// Initializes a new <see cref="DefaultValidationHtmlAttributeProvider"/> instance.
/// </summary>
/// <param name="optionsAccessor">The accessor for <see cref="MvcViewOptions"/>.</param>
/// <param name="metadataProvider">The <see cref="IModelMetadataProvider"/>.</param>
/// <param name="clientValidatorCache">The <see cref="ClientValidatorCache"/> that provides
/// a list of <see cref="IClientModelValidator"/>s.</param>
public DefaultValidationHtmlAttributeProvider(
IOptions<MvcViewOptions> optionsAccessor,
IModelMetadataProvider metadataProvider,
ClientValidatorCache clientValidatorCache)
{
ArgumentNullException.ThrowIfNull(optionsAccessor);
ArgumentNullException.ThrowIfNull(metadataProvider);
ArgumentNullException.ThrowIfNull(clientValidatorCache);
_clientValidatorCache = clientValidatorCache;
_metadataProvider = metadataProvider;
var clientValidatorProviders = optionsAccessor.Value.ClientModelValidatorProviders;
_clientModelValidatorProvider = new CompositeClientModelValidatorProvider(clientValidatorProviders);
}
/// <inheritdoc />
public override void AddValidationAttributes(
ViewContext viewContext,
ModelExplorer modelExplorer,
IDictionary<string, string> attributes)
{
ArgumentNullException.ThrowIfNull(viewContext);
ArgumentNullException.ThrowIfNull(modelExplorer);
ArgumentNullException.ThrowIfNull(attributes);
var formContext = viewContext.ClientValidationEnabled ? viewContext.FormContext : null;
if (formContext == null)
{
return;
}
var validators = _clientValidatorCache.GetValidators(
modelExplorer.Metadata,
_clientModelValidatorProvider);
if (validators.Count > 0)
{
var validationContext = new ClientModelValidationContext(
viewContext,
modelExplorer.Metadata,
_metadataProvider,
attributes);
for (var i = 0; i < validators.Count; i++)
{
var validator = validators[i];
validator.AddValidation(validationContext);
}
}
}
}
|