69 lines
1.8 KiB
C#
69 lines
1.8 KiB
C#
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// Copyright (c) The Geekeey Authors
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// SPDX-License-Identifier: EUPL-1.2
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using System.Collections.Concurrent;
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using System.Reflection.Metadata;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Options;
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[assembly: MetadataUpdateHandler(typeof(Geekeey.Request.Validation.DispatchingValidator))]
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namespace Geekeey.Request.Validation;
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internal sealed class DispatchingValidator : IValidator
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{
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private static readonly ConcurrentDictionary<Type, ValidatorInvoker> ValidatorsHandlers = new();
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private readonly IServiceProvider _serviceProvider;
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public DispatchingValidator(IServiceProvider serviceProvider)
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{
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_serviceProvider = serviceProvider;
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}
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public Validation Validate(ValidationContext context)
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{
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ArgumentNullException.ThrowIfNull(context);
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if (context.Instance is null)
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{
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return new Validation([]);
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}
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var handler = ValidatorsHandlers.GetOrAdd(context.Instance.GetType(), static key =>
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{
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var type = typeof(ValidatorInvoker<>).MakeGenericType(key);
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return (ValidatorInvoker)Activator.CreateInstance(type)!;
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});
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return handler.Validate(context, _serviceProvider);
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}
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private abstract class ValidatorInvoker
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{
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public abstract Validation Validate(ValidationContext context, IServiceProvider serviceProvider);
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}
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private sealed class ValidatorInvoker<T> : ValidatorInvoker
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{
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public override Validation Validate(ValidationContext context, IServiceProvider serviceProvider)
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{
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var options = serviceProvider.GetRequiredService<IOptions<ValidationOptions>>().Value;
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var validators = options.GetValidators<T>(serviceProvider);
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var problems = new List<Problem>();
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foreach (var validator in validators)
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{
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if (validator.Validate(context) is { IsValid: false, Problems: { } result })
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{
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problems.AddRange(result);
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}
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}
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return new Validation(problems);
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}
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}
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}
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