feat: move PKMessage JSON to PluralKit.Core

PluralKit.Core/Models/PKMessage.cs

@@ -0,0 +1,39 @@
+using Newtonsoft.Json.Linq;
+
+using NodaTime;
+
+namespace PluralKit.Core
+{
+    public class PKMessage
+    {
+        public ulong Mid { get; set; }
+        public ulong? Guild { get; set; } // null value means "no data" (ie. from before this field being added)
+        public ulong Channel { get; set; }
+        public MemberId Member { get; set; }
+        public ulong Sender { get; set; }
+        public ulong? OriginalMid { get; set; }
+    }
+
+    public class FullMessage
+    {
+        public PKMessage Message;
+        public PKMember Member;
+        public PKSystem System;
+
+        public JObject ToJson(LookupContext ctx, APIVersion v)
+        {
+            var o = new JObject();
+
+            o.Add("timestamp", Instant.FromUnixTimeMilliseconds((long)(this.Message.Mid >> 22) + 1420070400000).ToString());
+            o.Add("id", this.Message.Mid.ToString());
+            o.Add("original", this.Message.OriginalMid.ToString());
+            o.Add("sender", this.Message.Sender.ToString());
+            o.Add("channel", this.Message.Channel.ToString());
+            o.Add("guild", this.Message.Guild?.ToString());
+            o.Add("system", this.System.ToJson(ctx, v));
+            o.Add("member", this.Member.ToJson(ctx, v: v));
+
+            return o;
+        }
+    }
+}