49 lines
1.5 KiB
C#
49 lines
1.5 KiB
C#
#nullable enable
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using System;
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using Newtonsoft.Json.Linq;
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namespace NitroxServer.Serialization.SaveDataUpgrades
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{
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public static class NewtonsoftExtensions
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{
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public static void Rename(this JToken token, string newName)
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{
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if (token == null)
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{
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throw new ArgumentNullException("token", "Cannot rename a null token");
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}
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JProperty property;
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if (token.Type == JTokenType.Property)
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{
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if (token.Parent == null)
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{
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throw new InvalidOperationException("Cannot rename a property with no parent");
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}
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property = (JProperty)token;
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}
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else
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{
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if (token.Parent == null || token.Parent.Type != JTokenType.Property)
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{
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throw new InvalidOperationException("This token's parent is not a JProperty; cannot rename");
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}
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property = (JProperty)token.Parent;
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}
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// Note: to avoid triggering a clone of the existing property's value,
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// we need to save a reference to it and then null out property.Value
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// before adding the value to the new JProperty.
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// Thanks to @dbc for the suggestion.
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JToken? existingValue = property.Value;
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property.Value = null!;
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JProperty? newProperty = new JProperty(newName, existingValue);
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property.Replace(newProperty);
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}
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}
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}
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