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Feature/system.text.json (#192)

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Initial support for System.Text.Json and some refactoring
This commit is contained in:
Jan Korf
2024-03-16 14:45:36 +01:00
committed by GitHub
parent 462c857bba
commit 2fb3442800
66 changed files with 2318 additions and 1095 deletions
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CryptoExchange.Net/Converters/SystemTextJson/DateTimeConverter.cs
+202
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using System;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.Text.Json;
using System.Text.Json.Serialization;
namespace CryptoExchange.Net.Converters.SystemTextJson
{
/// <summary>
/// Date time converter
/// </summary>
public class DateTimeConverter : JsonConverterFactory
{
private static readonly DateTime _epoch = new(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
private const long _ticksPerSecond = TimeSpan.TicksPerMillisecond * 1000;
private const double _ticksPerMicrosecond = TimeSpan.TicksPerMillisecond / 1000d;
private const double _ticksPerNanosecond = TimeSpan.TicksPerMillisecond / 1000d / 1000;
/// <inheritdoc />
public override bool CanConvert(Type typeToConvert)
{
return typeToConvert == typeof(DateTime) || typeToConvert == typeof(DateTime?);
}
/// <inheritdoc />
public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
{
Type converterType = typeof(DateTimeConverterInner<>).MakeGenericType(typeToConvert);
return (JsonConverter)Activator.CreateInstance(converterType);
}
private class DateTimeConverterInner<T> : JsonConverter<T>
{
public override T Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
=> (T)((object?)ReadDateTime(ref reader, typeToConvert, options) ?? default(T))!;
private DateTime? ReadDateTime(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
if (reader.TokenType == JsonTokenType.Null)
{
if (typeToConvert == typeof(DateTime))
Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | DateTime value of null, but property is not nullable");
return default;
}
if (reader.TokenType is JsonTokenType.Number)
{
var longValue = reader.GetDouble();
if (longValue == 0 || longValue == -1)
return default;
if (longValue < 19999999999)
return ConvertFromSeconds(longValue);
if (longValue < 19999999999999)
return ConvertFromMilliseconds(longValue);
if (longValue < 19999999999999999)
return ConvertFromMicroseconds(longValue);
return ConvertFromNanoseconds(longValue);
}
else if (reader.TokenType is JsonTokenType.String)
{
var stringValue = reader.GetString();
if (string.IsNullOrWhiteSpace(stringValue)
|| stringValue == "-1"
|| double.TryParse(stringValue, out var doubleVal) && doubleVal == 0)
{
return default;
}
if (stringValue!.Length == 8)
{
// Parse 20211103 format
if (!int.TryParse(stringValue.Substring(0, 4), out var year)
|| !int.TryParse(stringValue.Substring(4, 2), out var month)
|| !int.TryParse(stringValue.Substring(6, 2), out var day))
{
Trace.WriteLine($"{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
return default;
}
return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
}
if (stringValue.Length == 6)
{
// Parse 211103 format
if (!int.TryParse(stringValue.Substring(0, 2), out var year)
|| !int.TryParse(stringValue.Substring(2, 2), out var month)
|| !int.TryParse(stringValue.Substring(4, 2), out var day))
{
Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
return default;
}
return new DateTime(year + 2000, month, day, 0, 0, 0, DateTimeKind.Utc);
}
if (double.TryParse(stringValue, NumberStyles.Float, CultureInfo.InvariantCulture, out var doubleValue))
{
// Parse 1637745563.000 format
if (doubleValue < 19999999999)
return ConvertFromSeconds(doubleValue);
if (doubleValue < 19999999999999)
return ConvertFromMilliseconds((long)doubleValue);
if (doubleValue < 19999999999999999)
return ConvertFromMicroseconds((long)doubleValue);
return ConvertFromNanoseconds((long)doubleValue);
}
if (stringValue.Length == 10)
{
// Parse 2021-11-03 format
var values = stringValue.Split('-');
if (!int.TryParse(values[0], out var year)
|| !int.TryParse(values[1], out var month)
|| !int.TryParse(values[2], out var day))
{
Trace.WriteLine("{DateTime.Now:yyyy/MM/dd HH:mm:ss:fff} | Warning | Unknown DateTime format: " + stringValue);
return default;
}
return new DateTime(year, month, day, 0, 0, 0, DateTimeKind.Utc);
}
return DateTime.Parse(stringValue, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal);
}
else
{
return reader.GetDateTime();
}
}
public override void Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
{
if (value == null)
writer.WriteNullValue();
else
{
var dtValue = (DateTime)(object)value;
if (dtValue == default)
writer.WriteStringValue(default(DateTime));
else
writer.WriteNumberValue((long)Math.Round((dtValue - new DateTime(1970, 1, 1)).TotalMilliseconds));
}
}
}
/// <summary>
/// Convert a seconds since epoch (01-01-1970) value to DateTime
/// </summary>
/// <param name="seconds"></param>
/// <returns></returns>
public static DateTime ConvertFromSeconds(double seconds) => _epoch.AddTicks((long)Math.Round(seconds * _ticksPerSecond));
/// <summary>
/// Convert a milliseconds since epoch (01-01-1970) value to DateTime
/// </summary>
/// <param name="milliseconds"></param>
/// <returns></returns>
public static DateTime ConvertFromMilliseconds(double milliseconds) => _epoch.AddTicks((long)Math.Round(milliseconds * TimeSpan.TicksPerMillisecond));
/// <summary>
/// Convert a microseconds since epoch (01-01-1970) value to DateTime
/// </summary>
/// <param name="microseconds"></param>
/// <returns></returns>
public static DateTime ConvertFromMicroseconds(double microseconds) => _epoch.AddTicks((long)Math.Round(microseconds * _ticksPerMicrosecond));
/// <summary>
/// Convert a nanoseconds since epoch (01-01-1970) value to DateTime
/// </summary>
/// <param name="nanoseconds"></param>
/// <returns></returns>
public static DateTime ConvertFromNanoseconds(double nanoseconds) => _epoch.AddTicks((long)Math.Round(nanoseconds * _ticksPerNanosecond));
/// <summary>
/// Convert a DateTime value to seconds since epoch (01-01-1970) value
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
[return: NotNullIfNotNull("time")]
public static long? ConvertToSeconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).TotalSeconds);
/// <summary>
/// Convert a DateTime value to milliseconds since epoch (01-01-1970) value
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
[return: NotNullIfNotNull("time")]
public static long? ConvertToMilliseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).TotalMilliseconds);
/// <summary>
/// Convert a DateTime value to microseconds since epoch (01-01-1970) value
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
[return: NotNullIfNotNull("time")]
public static long? ConvertToMicroseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).Ticks / _ticksPerMicrosecond);
/// <summary>
/// Convert a DateTime value to nanoseconds since epoch (01-01-1970) value
/// </summary>
/// <param name="time"></param>
/// <returns></returns>
[return: NotNullIfNotNull("time")]
public static long? ConvertToNanoseconds(DateTime? time) => time == null ? null : (long)Math.Round((time.Value - _epoch).Ticks / _ticksPerNanosecond);
}
}