DeepTrace/PrometheusAPI/TimeSeriesCoverter.cs

using System.Text.Json;
using System.Text.Json.Serialization;

namespace PrometheusAPI;

internal class TimeSeriesCoverter : JsonConverter<TimeSeries?>
{
    public override TimeSeries? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        if (reader.TokenType != JsonTokenType.StartArray)
            throw new JsonException();

        reader.Read();

        if ( reader.TokenType != JsonTokenType.Number)
            throw new JsonException();

        var s = JsonSerializer.Deserialize<double>(ref reader, options);

        reader.Read();

        double f;
        if (reader.TokenType == JsonTokenType.Number)
            f = JsonSerializer.Deserialize<double>(ref reader, options);
        else if (reader.TokenType == JsonTokenType.String)
            f = Convert.ToDouble(JsonSerializer.Deserialize<string>(ref reader, options));
        else
            throw new JsonException();

        reader.Read();

        if (reader.TokenType != JsonTokenType.EndArray)
            throw new JsonException();

        return new TimeSeries(TimeSeries.UnixTimeStampToDateTime(s), (float)f);
    }

    public override void Write(Utf8JsonWriter writer, TimeSeries? value, JsonSerializerOptions options)
    {
        writer.WriteStartArray();

        if (value != null)
        {
            writer.WriteNumberValue(TimeSeries.DateTimeToUnixTimestamp(value.TimeStamp));
            writer.WriteNumberValue(value.Value);
        }

        writer.WriteEndArray();

    }
}