111 lines
4.6 KiB
C#
111 lines
4.6 KiB
C#
#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Globalization;
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using LC.Newtonsoft.Json.Utilities;
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namespace LC.Newtonsoft.Json.Converters
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{
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/// <summary>
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/// Converts a <see cref="DateTime"/> to and from a JavaScript <c>Date</c> constructor (e.g. <c>new Date(52231943)</c>).
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/// </summary>
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public class JavaScriptDateTimeConverter : DateTimeConverterBase
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{
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/// <summary>
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/// Writes the JSON representation of the object.
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/// </summary>
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/// <param name="writer">The <see cref="JsonWriter"/> to write to.</param>
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/// <param name="value">The value.</param>
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/// <param name="serializer">The calling serializer.</param>
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public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
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{
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long ticks;
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if (value is DateTime dateTime)
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{
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DateTime utcDateTime = dateTime.ToUniversalTime();
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ticks = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(utcDateTime);
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}
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#if HAVE_DATE_TIME_OFFSET
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else if (value is DateTimeOffset dateTimeOffset)
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{
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DateTimeOffset utcDateTimeOffset = dateTimeOffset.ToUniversalTime();
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ticks = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(utcDateTimeOffset.UtcDateTime);
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}
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#endif
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else
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{
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throw new JsonSerializationException("Expected date object value.");
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}
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writer.WriteStartConstructor("Date");
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writer.WriteValue(ticks);
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writer.WriteEndConstructor();
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}
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/// <summary>
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/// Reads the JSON representation of the object.
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/// </summary>
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/// <param name="reader">The <see cref="JsonReader"/> to read from.</param>
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/// <param name="objectType">Type of the object.</param>
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/// <param name="existingValue">The existing property value of the JSON that is being converted.</param>
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/// <param name="serializer">The calling serializer.</param>
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/// <returns>The object value.</returns>
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public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
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{
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if (reader.TokenType == JsonToken.Null)
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{
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if (!ReflectionUtils.IsNullable(objectType))
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{
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throw JsonSerializationException.Create(reader, "Cannot convert null value to {0}.".FormatWith(CultureInfo.InvariantCulture, objectType));
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}
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return null;
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}
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if (reader.TokenType != JsonToken.StartConstructor || !string.Equals(reader.Value.ToString(), "Date", StringComparison.Ordinal))
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{
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throw JsonSerializationException.Create(reader, "Unexpected token or value when parsing date. Token: {0}, Value: {1}".FormatWith(CultureInfo.InvariantCulture, reader.TokenType, reader.Value));
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}
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if (!JavaScriptUtils.TryGetDateFromConstructorJson(reader, out DateTime d, out string errorMessage))
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{
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throw JsonSerializationException.Create(reader, errorMessage);
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}
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#if HAVE_DATE_TIME_OFFSET
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Type t = (ReflectionUtils.IsNullableType(objectType))
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? Nullable.GetUnderlyingType(objectType)
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: objectType;
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if (t == typeof(DateTimeOffset))
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{
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return new DateTimeOffset(d);
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}
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#endif
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return d;
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}
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}
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} |