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60 lines
2.1 KiB
C#
60 lines
2.1 KiB
C#
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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namespace Jellyfin.Api.ModelBinders
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{
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/// <summary>
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/// Comma delimited array model binder.
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/// Returns an empty array of specified type if there is no query parameter.
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/// </summary>
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public class CommaDelimitedArrayModelBinder : IModelBinder
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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 > 1)
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{
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var result = Array.CreateInstance(elementType, valueProviderResult.Length);
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for (int i = 0; i < valueProviderResult.Length; i++)
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{
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var value = converter.ConvertFromString(valueProviderResult.Values[i].Trim());
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result.SetValue(value, i);
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}
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bindingContext.Result = ModelBindingResult.Success(result);
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}
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else
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{
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var value = valueProviderResult.FirstValue;
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if (value != null)
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{
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var values = Array.ConvertAll(
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value.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries),
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x => converter.ConvertFromString(x?.Trim()));
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var typedValues = Array.CreateInstance(elementType, values.Length);
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values.CopyTo(typedValues, 0);
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bindingContext.Result = ModelBindingResult.Success(typedValues);
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}
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else
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{
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var emptyResult = Array.CreateInstance(elementType, 0);
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bindingContext.Result = ModelBindingResult.Success(emptyResult);
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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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