46 lines
1.4 KiB
46 lines
1.4 KiB
using System;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace MediaBrowser.Common.Json.Converters
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{
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/// <summary>
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/// Converts a nullable struct or value to/from JSON.
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/// Required - some clients send an empty string.
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/// </summary>
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/// <typeparam name="TStruct">The struct type.</typeparam>
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public class JsonNullableStructConverter<TStruct> : JsonConverter<TStruct?>
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where TStruct : struct
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{
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/// <inheritdoc />
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public override TStruct? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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if (reader.TokenType == JsonTokenType.Null)
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{
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return null;
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}
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// Token is empty string.
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if (reader.TokenType == JsonTokenType.String && ((reader.HasValueSequence && reader.ValueSequence.IsEmpty) || reader.ValueSpan.IsEmpty))
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{
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return null;
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}
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return JsonSerializer.Deserialize<TStruct>(ref reader, options);
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}
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/// <inheritdoc />
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public override void Write(Utf8JsonWriter writer, TStruct? value, JsonSerializerOptions options)
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{
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if (value.HasValue)
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{
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JsonSerializer.Serialize(writer, value.Value, options);
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}
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else
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{
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writer.WriteNullValue();
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}
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}
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}
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}
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