47 lines
1.7 KiB
C#
47 lines
1.7 KiB
C#
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using System;
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using System.ComponentModel;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Mvc.ModelBinding;
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using Microsoft.Extensions.Logging;
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namespace Jellyfin.Api.ModelBinders
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{
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/// <summary>
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/// Nullable enum model binder.
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/// </summary>
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public class NullableEnumModelBinder : IModelBinder
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{
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private readonly ILogger<NullableEnumModelBinder> _logger;
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/// <summary>
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/// Initializes a new instance of the <see cref="NullableEnumModelBinder"/> class.
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/// </summary>
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/// <param name="logger">Instance of the <see cref="ILogger{NullableEnumModelBinder}"/> interface.</param>
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public NullableEnumModelBinder(ILogger<NullableEnumModelBinder> logger)
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{
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_logger = logger;
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}
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/// <inheritdoc />
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public Task BindModelAsync(ModelBindingContext bindingContext)
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{
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var valueProviderResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);
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var elementType = bindingContext.ModelType.GetElementType() ?? bindingContext.ModelType.GenericTypeArguments[0];
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var converter = TypeDescriptor.GetConverter(elementType);
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if (valueProviderResult.Length != 0)
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{
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try
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{
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var convertedValue = converter.ConvertFromString(valueProviderResult.FirstValue);
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bindingContext.Result = ModelBindingResult.Success(convertedValue);
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}
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catch (FormatException e)
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{
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_logger.LogWarning(e, "Error converting value.");
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}
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}
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return Task.CompletedTask;
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}
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}
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}
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