Allow setting ban expiry (#559)

Author: bubbafett5611

src/Libraries/Covalence/RustServer.cs

@@ -145,14 +145,18 @@ public DateTime Time
         /// <param name="id"></param>
         /// <param name="reason"></param>
         /// <param name="duration"></param>
-        public void Ban(string id, string reason, TimeSpan duration = default)
-        {
-            if (!IsBanned(id))
-            {
-                ServerUsers.Set(ulong.Parse(id), ServerUsers.UserGroup.Banned, Name, reason);
-                ServerUsers.Save();
-            }
-        }
+    	public void Ban(string id, string reason, TimeSpan duration = default)
+    	{
+    		if (IsBanned(id)) return;
+    		long expiryUnixTime = -1L;
+    		if (duration != TimeSpan.Zero)
+    		{
+    			DateTime expiryTime = DateTime.UtcNow.Add(duration);
+    			expiryUnixTime = new DateTimeOffset(expiryTime).ToUnixTimeSeconds();
+    		}
+    		ServerUsers.Set(ulong.Parse(id), ServerUsers.UserGroup.Banned, Name, reason, expiryUnixTime);
+    		ServerUsers.Save();
+    	}
 
         /// <summary>
         /// Gets the amount of time remaining on the player's ban

src/Libraries/Player.cs

@@ -120,15 +120,16 @@ public CultureInfo Language(BasePlayer player)
         /// </summary>
         /// <param name="id"></param>
         /// <param name="reason"></param>
-        public void Ban(ulong id, string reason = "")
+        /// <param name="expiry"></param>
+        public void Ban(ulong id, string reason = "", long expiry = -1L)
         {
             if (IsBanned(id))
             {
                 return;
             }
 
             BasePlayer player = FindById(id);
-            ServerUsers.Set(id, ServerUsers.UserGroup.Banned, player?.displayName ?? "Unknown", reason);
+            ServerUsers.Set(id, ServerUsers.UserGroup.Banned, player?.displayName ?? "Unknown", reason, expiry);
             ServerUsers.Save();
             if (player != null && IsConnected(player))
             {
@@ -141,14 +142,16 @@ public void Ban(ulong id, string reason = "")
         /// </summary>
         /// <param name="id"></param>
         /// <param name="reason"></param>
-        public void Ban(string id, string reason = "") => Ban(Convert.ToUInt64(id), reason);
+        /// <param name="expiry"></param>
+        public void Ban(string id, string reason = "", long expiry = -1L) => Ban(Convert.ToUInt64(id), reason, expiry);
 
         /// <summary>
         /// Bans the player from the server
         /// </summary>
         /// <param name="player"></param>
         /// <param name="reason"></param>
-        public void Ban(BasePlayer player, string reason = "") => Ban(player.UserIDString, reason);
+        /// <param name="expiry"></param>
+        public void Ban(BasePlayer player, string reason = "", long expiry = -1L) => Ban(player.UserIDString, reason, expiry);
 
         /// <summary>
         /// Heals the player by specified amount