From b99d520019d0e03f2d4cfea602e6bce0f602af84 Mon Sep 17 00:00:00 2001
From: Kamron Batman <3953314+kamronbatman@users.noreply.github.com>
Date: Sun, 11 Jul 2021 15:20:34 -0700
Subject: [PATCH] fix(core): Anchors delta min/max (#656)

---
 Projects/Server/Serialization/IGenericReader.cs | 11 ++++++++++-
 Projects/Server/Serialization/IGenericWriter.cs | 15 +++++++++++++--
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/Projects/Server/Serialization/IGenericReader.cs b/Projects/Server/Serialization/IGenericReader.cs
index 9f8617c85..ca88ba6b6 100644
--- a/Projects/Server/Serialization/IGenericReader.cs
+++ b/Projects/Server/Serialization/IGenericReader.cs
@@ -36,7 +36,16 @@ namespace Server
 
         DateTime ReadDateTime() => new(ReadLong(), DateTimeKind.Utc);
         TimeSpan ReadTimeSpan() => new(ReadLong());
-        DateTime ReadDeltaTime() => new(ReadLong() + DateTime.UtcNow.Ticks, DateTimeKind.Utc);
+
+        DateTime ReadDeltaTime()
+        {
+            return ReadLong() switch
+            {
+                long.MinValue => DateTime.MinValue,
+                long.MaxValue => DateTime.MaxValue,
+                var delta     => new DateTime(delta + DateTime.UtcNow.Ticks, DateTimeKind.Utc)
+            };
+        }
         decimal ReadDecimal() => new(stackalloc int[4] { ReadInt(), ReadInt(), ReadInt(), ReadInt() });
         int ReadEncodedInt()
         {
diff --git a/Projects/Server/Serialization/IGenericWriter.cs b/Projects/Server/Serialization/IGenericWriter.cs
index 5507f8799..36be59a1a 100644
--- a/Projects/Server/Serialization/IGenericWriter.cs
+++ b/Projects/Server/Serialization/IGenericWriter.cs
@@ -41,7 +41,7 @@ namespace Server
             var ticks = (value.Kind switch
             {
                 DateTimeKind.Local       => value.ToUniversalTime(),
-                DateTimeKind.Unspecified => value.ToLocalTime().ToUniversalTime(),
+                DateTimeKind.Unspecified  => value.ToLocalTime().ToUniversalTime(),
                 _                        => value
             }).Ticks;
 
@@ -49,10 +49,21 @@ namespace Server
         }
         void WriteDeltaTime(DateTime value)
         {
+            if (value == DateTime.MinValue)
+            {
+                Write(long.MinValue);
+                return;
+            }
+
+            if (value == DateTime.MaxValue)
+            {
+                Write(long.MaxValue);
+            }
+
             var ticks = (value.Kind switch
             {
                 DateTimeKind.Local       => value.ToUniversalTime(),
-                DateTimeKind.Unspecified => value.ToLocalTime().ToUniversalTime(),
+                DateTimeKind.Unspecified  => value.ToLocalTime().ToUniversalTime(),
                 _                        => value
             }).Ticks;