Added UpdateManager.cs

Update checks now happen every 5 minutes. Side effect: Instant join update is now delayed 5 minutes.

TShockAPI/UpdateManager.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+
+namespace TShockAPI
+{
+    class UpdateManager
+    {
+        static string updateUrl = "http://shankshock.com/tshock-update.txt";
+        public static bool updateCmd;
+        public static long updateEpoch = 0;
+        public static string[] globalChanges = {};
+        /// <summary>
+        /// Checks to see if the server is out of date.
+        /// </summary>
+        /// <returns></returns>
+        public static bool ServerIsOutOfDate()
+        {
+            WebClient client = new WebClient();
+            client.Headers.Add("user-agent",
+                               "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705;)");
+            try
+            {
+                string updateString = client.DownloadString(updateUrl);
+                string[] changes = updateString.Split(',');
+                Version updateVersion = new Version(Convert.ToInt32(changes[0]), Convert.ToInt32(changes[1]),
+                                                    Convert.ToInt32(changes[2]), Convert.ToInt32(changes[3]));
+                if (TShock.VersionNum.CompareTo(updateVersion) < 0)
+                {
+                    globalChanges = changes;
+                    return true;
+                }
+            }
+            catch (Exception e)
+            {
+                FileTools.WriteError(e.Message);
+            }
+            return false;
+        }
+
+        public static void EnableUpdateCommand()
+        {
+            Commands.commands.Add(new Commands.Command("updatenow", "maintenance", Commands.UpdateNow));
+            updateCmd = true;
+        }
+        
+        public static void NotifyAdministrators(string[] changes)
+        {
+            for (int i = 0; i < ConfigurationManager.maxSlots; i++)
+            {
+                if (Terraria.Main.player[i].active)
+                {
+                    if (!TShock.players[i].group.HasPermission("maintenance"))
+                        return;
+                    Tools.SendMessage(i, "The server is out of date. To update, type /updatenow.");
+                    for (int j = 4; j <= changes.Length; j++)
+                    {
+                        Tools.SendMessage(i, changes[i], new float[] { 255, 0, 0 });
+                    }
+                }
+            }
+        }
+
+        public static void UpdateProcedureCheck()
+        {
+            long currentEpoch = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000;
+            if (currentEpoch > UpdateManager.updateEpoch)
+            {
+                if (ServerIsOutOfDate())
+                {
+                    EnableUpdateCommand();
+                    NotifyAdministrators(globalChanges);
+                }
+            }
+        }
+
+    }
+}