Add remote rekeying feature

Author: ocdtrekkie

docs/ErrorCodes.md

@@ -2,6 +2,8 @@
 
 6001 - Sync settings are not configured!
 6002 - Sync error
+6003 - Sync remotely rekeyed (warning)
+6004 - Sync was remotely rekeyed, but it was unsuccessful
 
 6011 - Ping error
 6012 - Get public IP error

modCommand.cs

@@ -46,6 +46,8 @@ public static void Handle(string inputCommand, string inputSource, string reques
                 case "reboot" when inputData.Length == 2:
                 case "restart" when inputData.Length == 2:
                     if (inputData[1] == "host") { outputResponse = modSystem.RebootHost(); } break;
+                case "remote" when inputData.Length == 4:
+                    if (inputData[1] == "rekey" && inputData[2].StartsWith("https://")) { outputResponse = modSync.RemoteRekey(inputData[2], inputData[3]); } break;
                 case "reset" when inputData.Length == 3:
                     if (inputData[1] == "installed" && inputData[2] == "software") { outputResponse = modSystem.ResetInstalledSoftware(); } break;
                 case "shutdown" when inputData.Length == 2:

modSync.cs

@@ -51,6 +51,31 @@ public static void Unload()
             }
         }
 
+        /// <summary>
+        /// Changes the sync server and Sandstorm token
+        /// </summary>
+        /// <param name="NewServerURL">(string) New server URL for sync</param>
+        /// <param name="NewSandstormToken">(string) New Sandstorm token for sync</param>
+        /// <returns>(string) Message about result</returns>
+        public static string RemoteRekey(string NewServerURL, string NewSandstormToken)
+        {
+            int SuccessCount = 0;
+            Sync_ServerURL = NewServerURL;
+            Sync_SandstormToken = NewSandstormToken;
+            SuccessCount += modDatabase.UpdateConfig(new modDatabase.Config { Key = "Sync_ServerURL", Value = NewServerURL });
+            SuccessCount += modDatabase.UpdateConfig(new modDatabase.Config { Key = "Sync_SandstormToken", Value = NewSandstormToken });
+            if (SuccessCount == 2)
+            {
+                modLogging.LogEvent("Sync remotely rekeyed", EventLogEntryType.Warning, 6003);
+                return "Remote rekey successful";
+            }
+            else
+            {
+                modLogging.LogEvent("Sync was remotely rekeyed, but it was unsuccessful", EventLogEntryType.Error, 6004);
+                return "Remote rekey failed";
+            }
+        }
+
         /// <summary>
         /// Sends a message to the sync server
         /// </summary>