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using System;
using System.Text.RegularExpressions;
using Microsoft.Xna.Framework;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using StardewModdingAPI.Framework.Exceptions;
namespace StardewModdingAPI.Framework.Serialisation
{
/// <summary>Handles deserialisation of <see cref="Rectangle"/> for crossplatform compatibility.</summary>
internal class RectangleConverter : JsonConverter
{
/*********
** Accessors
*********/
/// <summary>Whether this converter can write JSON.</summary>
public override bool CanWrite => false;
/*********
** Public methods
*********/
/// <summary>Get whether this instance can convert the specified object type.</summary>
/// <param name="objectType">The object type.</param>
public override bool CanConvert(Type objectType)
{
return objectType == typeof(Rectangle);
}
/// <summary>Reads the JSON representation of the object.</summary>
/// <param name="reader">The JSON reader.</param>
/// <param name="objectType">The object type.</param>
/// <param name="existingValue">The object being read.</param>
/// <param name="serializer">The calling serializer.</param>
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
// Linux/Mac: { "X": 1, "Y": 2, "Width": 3, "Height": 4 }
// Windows: "{X:1 Y:2 Width:3 Height:4}"
JToken token = JToken.Load(reader);
switch (token.Type)
{
case JTokenType.Object:
{
JObject obj = (JObject)token;
int x = obj.Value<int>(nameof(Rectangle.X));
int y = obj.Value<int>(nameof(Rectangle.Y));
int width = obj.Value<int>(nameof(Rectangle.Width));
int height = obj.Value<int>(nameof(Rectangle.Height));
return new Rectangle(x, y, width, height);
}
case JTokenType.String:
{
string str = token.Value<string>();
if (string.IsNullOrWhiteSpace(str))
return Rectangle.Empty;
var match = Regex.Match(str, @"^\{X:(?<x>\d+) Y:(?<y>\d+) Width:(?<width>\d+) Height:(?<height>\d+)\}$");
if (!match.Success)
throw new SParseException($"Can't parse {typeof(Rectangle).Name} from {reader.Path}, invalid string format.");
int x = Convert.ToInt32(match.Groups["x"].Value);
int y = Convert.ToInt32(match.Groups["y"].Value);
int width = Convert.ToInt32(match.Groups["width"].Value);
int height = Convert.ToInt32(match.Groups["height"].Value);
return new Rectangle(x, y, width, height);
}
default:
throw new SParseException($"Can't parse {typeof(Rectangle).Name} from {reader.Path}, must be an object or string.");
}
}
/// <summary>Writes the JSON representation of the object.</summary>
/// <param name="writer">The JSON writer.</param>
/// <param name="value">The value.</param>
/// <param name="serializer">The calling serializer.</param>
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
throw new InvalidOperationException("This converter does not write JSON.");
}
}
}
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