Fix deserailisation of dates in format of 'milliseconds since epoch',…

… being used in direct messaging events.

TweetMoaSharp.nuspec

@@ -2,7 +2,7 @@
 <package>
 	<metadata>
 		<id>TweetMoaSharp</id>
-		<version>5.1.0</version>
+		<version>5.2.0</version>
 		<dependencies>
 			<group>
 				<dependency id="Newtonsoft.Json" version="11.0.2" />
@@ -18,9 +18,9 @@
 		<iconUrl>https://raw.githubusercontent.com/Yortw/tweetmoasharp/master/logo_tweetmoasharp.png</iconUrl>
 		<tags>twitter tweetmoasharp tweetsharp web api http rest wrapper json winrt uwp netcore netstandard10 netstandard20</tags>
 		<releaseNotes>
-			New in 5.1.0
+			New in 5.2.0
 			----------
-			- Async Direct Message methods now use the new API (and actually work)
+			- CreatedAt now set properly on direct message events.
  		</releaseNotes>
 	</metadata>
 	<files>

src/TweetSharp.Tests/TwitterServiceTests.cs

@@ -1745,6 +1745,7 @@ public async Task Can_Send_DirectMessageWithMedia()
 			Assert.IsNotNull(result);
 			Assert.IsNotNull(result.Event);
 			Assert.NotZero(result.Event.Id);
+			Assert.AreNotEqual(DateTime.MinValue, result.Event.CreatedAt);
 
 			var rate = service.Response.RateLimitStatus;
 			Assert.IsNotNull(rate);

src/TweetSharp/Properties/AssemblyInfoVersion.cs

@@ -9,5 +9,5 @@
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
 using System.Reflection;
-[assembly: AssemblyVersion("5.1.0.0")]
-[assembly: AssemblyFileVersion("5.1.0.0")]
+[assembly: AssemblyVersion("5.2.0.0")]
+[assembly: AssemblyFileVersion("5.2.0.0")]

src/TweetSharp/TwitterDateFormat.cs

@@ -45,6 +45,10 @@ public enum TwitterDateFormat
 		/// TrendsWeekly
 		/// </summary>
 		[Description("yyyy-MM-dd")]
-		TrendsWeekly
+		TrendsWeekly,
+		/// <summary>
+		/// Used by the new direct messaging/event API.
+		/// </summary>
+		MillisecondsSinceEpoch
 	}
 }

src/TweetSharp/TwitterDateTime.cs

@@ -33,6 +33,8 @@ public class TwitterDateTime : ITwitterModel
 		private static readonly IDictionary<string, string> _map =
 				new Dictionary<string, string>();
 
+		private static readonly DateTime Epoch = new DateTime(1970, 01, 01, 0, 0, 0, DateTimeKind.Utc);
+
 		/// <summary>
 		/// Gets or sets the Twitter-based date format.
 		/// </summary>
@@ -76,6 +78,9 @@ public static string ConvertFromDateTime(DateTime input, TwitterDateFormat forma
 		{
 			EnsureDateFormatsAreMapped();
 
+			if (format == TwitterDateFormat.MillisecondsSinceEpoch)
+				return input.Subtract(Epoch).TotalMilliseconds.ToString();
+
 #if !SILVERLIGHT && !Smartphone
 			var name = Enum.GetName(typeof(TwitterDateFormat), format);
 #else
@@ -120,6 +125,15 @@ public static DateTime ConvertToDateTime(string input)
 				}
 			}
 
+			if (Int64.TryParse(input, out var millisecondsSinceEpoch))
+			{
+				return new DateTime
+				(
+					Epoch.Add(TimeSpan.FromMilliseconds(millisecondsSinceEpoch)).Ticks,
+					DateTimeKind.Utc
+				);
+			}
+
 			return default(DateTime);
 		}
 
@@ -152,6 +166,15 @@ public static TwitterDateTime ConvertToTwitterDateTime(string input)
 					}
 				}
 
+				if (Int64.TryParse(input, out var millisecondsSinceEpoch))
+				{
+					return new TwitterDateTime
+					(
+						new DateTime(Epoch.Add(TimeSpan.FromMilliseconds(millisecondsSinceEpoch)).Ticks, DateTimeKind.Utc),
+						TwitterDateFormat.MillisecondsSinceEpoch
+					);
+				}
+
 				return default(TwitterDateTime);
 			}
 			finally
@@ -188,9 +211,12 @@ private static void EnsureDateFormatsAreMapped()
 											var fi = typeof(TwitterDateFormat).GetTypeInfo().GetDeclaredField(name);
 											var attributes = System.Linq.Enumerable.ToArray(fi.GetCustomAttributes(typeof(DescriptionAttribute), false));
 #endif
-						var format = (DescriptionAttribute)attributes[0];
-
-						_map.Add(name, format.Description);
+						if (attributes.Length > 0)
+						{
+							var format = (DescriptionAttribute)attributes[0];
+							if (!String.IsNullOrEmpty(format.Description))
+								_map.Add(name, format.Description);
+						}
 					}
 					finally
 					{

src/TweetSharp/TwitterDirectMessageEvent.cs

@@ -64,7 +64,7 @@ public virtual string Type
 #if !Smartphone && !NET20
 		[DataMember]
 #endif
-		[JsonProperty("created_at")]
+		[JsonProperty("created_timestamp")]
 		public virtual DateTime CreatedAt
 		{
 			get { return _createdAt; }

tweetmoasharp-push-nuget.bat

@@ -1 +1 @@
-".nuget\NuGet.exe" push TweetMoaSharp.5.1.0.nupkg -Source https://api.nuget.org/v3/index.json
+".nuget\NuGet.exe" push TweetMoaSharp.5.2.0.nupkg -Source https://api.nuget.org/v3/index.json