111 lines
3.8 KiB
C#
111 lines
3.8 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2020 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: Point2DConverter.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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using System;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace Server.Json
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{
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public class Point2DConverter : JsonConverter<Point2D>
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{
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private Point2D DeserializeArray(ref Utf8JsonReader reader)
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{
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Span<int> data = stackalloc int[2];
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var count = 0;
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while (true)
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{
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reader.Read();
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if (reader.TokenType == JsonTokenType.EndArray)
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{
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break;
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}
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if (reader.TokenType == JsonTokenType.Number)
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{
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if (count < 2)
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{
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data[count] = reader.GetInt32();
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}
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count++;
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}
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}
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if (count > 2)
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{
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throw new JsonException("Point2D must be an array of x, y");
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}
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return new Point2D(data[0], data[1]);
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}
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private Point2D DeserializeObj(ref Utf8JsonReader reader)
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{
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Span<int> data = stackalloc int[2];
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while (true)
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{
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reader.Read();
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if (reader.TokenType == JsonTokenType.EndObject)
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{
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break;
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}
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if (reader.TokenType != JsonTokenType.PropertyName)
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{
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throw new JsonException("Invalid json structure for Point2D object");
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}
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var key = reader.GetString();
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var i = key switch
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{
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"x" => 0,
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"y" => 1,
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_ => throw new JsonException($"Invalid property {key} for Point2D")
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};
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reader.Read();
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if (reader.TokenType != JsonTokenType.Number)
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{
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throw new JsonException($"Value for {key} must be a number");
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}
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data[i] = reader.GetInt32();
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}
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return new Point2D(data[0], data[1]);
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}
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public override Point2D Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) =>
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reader.TokenType switch
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{
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JsonTokenType.StartArray => DeserializeArray(ref reader),
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JsonTokenType.StartObject => DeserializeObj(ref reader),
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_ => throw new JsonException("Invalid Json for Point3D")
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};
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public override void Write(Utf8JsonWriter writer, Point2D value, JsonSerializerOptions options)
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{
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writer.WriteStartArray();
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writer.WriteNumberValue(value.X);
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writer.WriteNumberValue(value.Y);
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writer.WriteEndArray();
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}
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}
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}
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