Added way to have an overridable group that is session based.

New command /sudo <player> <group> will override the player's group with the group specified.

TShockAPI/Commands.cs

@@ -226,6 +226,7 @@ namespace TShockAPI
 			add(Permissions.savessi, SaveSSI, "savessi");
 			add(Permissions.savessi, OverrideSSI, "overridessi", "ossi");
 		    add(Permissions.xmas, ForceXmas, "forcexmas");
+		    add(Permissions.sudo, Sudo, "sudo");
 		    //add(null, TestCallbackCommand, "test");
 		}
 
@@ -433,6 +434,7 @@ namespace TShockAPI
 						args.Player.IgnoreActionsForDisabledArmor = "none";
 
 					args.Player.Group = group;
+				    args.Player.tempGroup = null;
 					args.Player.UserAccountName = user.Name;
 					args.Player.UserID = TShock.Users.GetUserID(args.Player.UserAccountName);
 					args.Player.IsLoggedIn = true;
@@ -1198,6 +1200,42 @@ namespace TShockAPI
                                 (TShock.Config.ForceXmas ? "in" : "not in")));
         }
 
+        public static void Sudo(CommandArgs args)
+        {
+            if (args.Parameters.Count < 2)
+            {
+                args.Player.SendInfoMessage("Invalid usage");
+                args.Player.SendInfoMessage("Usage: /sudo <username> <new group>");
+                return;
+            }
+
+            List<TSPlayer> ply = TShock.Utils.FindPlayer(args.Parameters[0]);
+            if(ply.Count < 1)
+            {
+                args.Player.SendErrorMessage(string.Format("Could not find player {0}.", args.Parameters[0]));
+                return;
+            }
+
+            if (ply.Count > 1)
+            {
+                args.Player.SendErrorMessage(string.Format("Found more than one match for {0}.", args.Parameters[0]));
+                return;
+            }
+
+            if(!TShock.Groups.GroupExists(args.Parameters[1]))
+            {
+                args.Player.SendErrorMessage(string.Format("Could not find group {0}", args.Parameters[1]));
+                return;
+            }
+
+            Group g = TShock.Utils.GetGroup(args.Parameters[1]);
+
+            ply[0].tempGroup = g;
+
+            args.Player.SendSuccessMessage(string.Format("You have changed {0}'s group to {1}", ply[0].Name, g.Name));
+            ply[0].SendSuccessMessage(string.Format("Your group has temporarily been changed to {0}", g.Name));
+        }
+
 		#endregion Player Management Commands
 
 		#region Server Maintenence Commands

TShockAPI/GetDataHandlers.cs

@@ -1372,6 +1372,7 @@ namespace TShockAPI
 				        args.Player.IgnoreActionsForDisabledArmor = "none";
 
 				    args.Player.Group = group;
+				    args.Player.tempGroup = null;
 				    args.Player.UserAccountName = args.Player.Name;
 				    args.Player.UserID = TShock.Users.GetUserID(args.Player.UserAccountName);
 				    args.Player.IsLoggedIn = true;

TShockAPI/Permissions.cs

@@ -175,7 +175,7 @@ namespace TShockAPI
 
         [Description("User can use /spawn.")] public static readonly string spawn;
 
-
+	    [Description("User can elevate other users' groups temporarily.")] public static readonly string sudo;
         static Permissions()
 		{
 			foreach (var field in typeof (Permissions).GetFields())

TShockAPI/TSPlayer.cs

@@ -71,10 +71,26 @@ namespace TShockAPI
 
 		public int FirstMaxMP { get; set; }
 
-        /// <summary>
-        /// The player's group.
-        /// </summary>
-		public Group Group { get; set; }
+	    /// <summary>
+	    /// The player's group.
+	    /// </summary>
+	    public Group Group
+	    {
+	        get
+	        {
+	            if (tempGroup != null)
+	                return tempGroup;
+	            return group;
+	        }
+            set { group = value; }
+	    }
+
+	    /// <summary>
+	    /// The player's temporary group.  This overrides the user's actual group.
+	    /// </summary>
+	    public Group tempGroup = null;
+
+	    private Group group = null;
 
 		public bool ReceivedInfo { get; set; }