Chris Chen
34 lines
1.3 KiB
C#
34 lines
1.3 KiB
C#
using System.Globalization;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace ROLAC.API.Json;
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/// <summary>
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/// Reads <see cref="DateOnly"/> from either "yyyy-MM-dd" or any ISO 8601 date-time
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/// (the date portion is taken). Writes as "yyyy-MM-dd". Lets JS clients send a Date
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/// without first formatting it.
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/// </summary>
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public sealed class TolerantDateOnlyConverter : JsonConverter<DateOnly>
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{
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private const string Format = "yyyy-MM-dd";
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public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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var s = reader.GetString();
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if (string.IsNullOrEmpty(s))
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throw new JsonException("Expected a date string for DateOnly.");
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if (DateOnly.TryParseExact(s, Format, CultureInfo.InvariantCulture, DateTimeStyles.None, out var d))
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return d;
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if (DateTimeOffset.TryParse(s, CultureInfo.InvariantCulture, DateTimeStyles.None, out var dto))
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return DateOnly.FromDateTime(dto.DateTime);
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throw new JsonException($"Unable to parse '{s}' as DateOnly.");
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}
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public override void Write(Utf8JsonWriter writer, DateOnly value, JsonSerializerOptions options)
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=> writer.WriteStringValue(value.ToString(Format, CultureInfo.InvariantCulture));
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}
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