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JsonMapper.cs
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JsonMapper.cs
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// ==========================================================================
// Squidex Headless CMS
// ==========================================================================
// Copyright (c) Squidex UG (haftungsbeschraenkt)
// All rights reserved. Licensed under the MIT license.
// ==========================================================================
using System.Globalization;
using Jint;
using Jint.Native;
using Jint.Native.Object;
using Squidex.Infrastructure;
using Squidex.Infrastructure.Json.Objects;
namespace Squidex.Domain.Apps.Core.Scripting.ContentWrapper;
public static class JsonMapper
{
private sealed class JsonObjectInstance : ObjectInstance
{
public JsonObjectInstance(Engine engine)
: base(engine)
{
}
}
public static JsValue Map(JsonValue value, Engine engine)
{
switch (value.Value)
{
case null:
return JsValue.Null;
case true:
return JsBoolean.True;
case false:
return JsBoolean.False;
case double n:
return new JsNumber(n);
case string s:
return new JsString(s);
case JsonObject o:
return FromObject(o, engine);
case JsonArray a:
return FromArray(a, engine);
}
ThrowInvalidType(nameof(value));
return JsValue.Null;
}
private static JsValue FromArray(JsonArray arr, Engine engine)
{
var target = new JsValue[arr.Count];
for (var i = 0; i < arr.Count; i++)
{
target[i] = Map(arr[i], engine);
}
return engine.Realm.Intrinsics.Array.Construct(target);
}
private static JsValue FromObject(JsonObject obj, Engine engine)
{
var target = new JsonObjectInstance(engine);
foreach (var (key, value) in obj)
{
target.Set(key, Map(value, engine));
}
return target;
}
public static JsonValue Map(JsValue? value)
{
if (value == null || value.IsNull() || value.IsUndefined())
{
return default;
}
if (value.IsString())
{
return value.AsString();
}
if (value.IsBoolean())
{
return value.AsBoolean();
}
if (value.IsDate())
{
return value.AsDate().ToString();
}
if (value.IsRegExp())
{
return value.AsRegExp().Value?.ToString();
}
if (value.IsNumber())
{
var number = value.AsNumber();
if (double.IsNaN(number) || double.IsPositiveInfinity(number) || double.IsNegativeInfinity(number))
{
return 0;
}
return number;
}
if (value.IsArray())
{
var arr = value.AsArray();
var result = new JsonArray((int)arr.Length);
for (var i = 0; i < arr.Length; i++)
{
result.Add(Map(arr.Get(i.ToString(CultureInfo.InvariantCulture))));
}
return result;
}
if (value.IsObject())
{
var obj = value.AsObject();
var result = new JsonObject((int)obj.Length);
foreach (var (key, propertyDescriptor) in obj.GetOwnProperties())
{
result[key.AsString()] = Map(propertyDescriptor.Value);
}
return result;
}
ThrowInvalidType(nameof(value));
return default;
}
private static void ThrowInvalidType(string argument)
{
ThrowHelper.ArgumentException("Invalid json type.", argument);
}
}