More flexible Room ID generation

LoadBalancerProject-DONT-IMPORT-INTO-UNITY/LRM_LoadBalancer/Config.cs

@@ -13,5 +13,6 @@ class Config
         public ushort EndpointPort = 7070;
         public bool ShowDebugLogs = false;
         public int RandomlyGeneratedIDLength = 5;
+        public bool RandomlyGeneratedIDNumerical = false;
     }
 }

LoadBalancerProject-DONT-IMPORT-INTO-UNITY/LRM_LoadBalancer/Program/ProgramExtra.cs

@@ -25,17 +25,19 @@ public long GetTotalServers()
 
             return temp;
         }
-
-        public string GenerateServerID()
+
+
+        public string GenerateServerID(string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ")
         {
-            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+            chars = conf.RandomlyGeneratedIDNumerical ? "0123456789" : chars;
             var randomID = "";
             var random = _cachedRandom;
 
             do
             {
                 randomID = new string(Enumerable.Repeat(chars, conf.RandomlyGeneratedIDLength)
-                                                        .Select(s => s[random.Next(s.Length)]).ToArray());
+                    .Select(s => s[random.Next(s.Length)])
+                    .ToArray());
             }
             while (cachedRooms.ContainsKey(randomID));
 

ServerProject-DONT-IMPORT-INTO-UNITY/LRM/Config.cs

@@ -20,6 +20,7 @@ public class Config
         // this wont be used if you are using load balancer
         // load balancer will generate instead.
         public int RandomlyGeneratedIDLength = 5;
+        public bool RandomlyGeneratedIDNumerical = false;
 
         //========================
         // Endpoint REST API Settings

ServerProject-DONT-IMPORT-INTO-UNITY/LRM/RelayHandler/RelayHandler.cs

@@ -19,17 +19,17 @@ public RelayHandler(int maxPacketSize)
         /// <param name="id">The ID to check for</param>
         /// <returns></returns>
         private bool DoesServerIdExist(string id) => _cachedRooms.ContainsKey(id);
-
-        private string GenerateRoomID()
+        
+        private string GenerateRoomID(string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ")
         {
-            const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+            chars = Program.conf.RandomlyGeneratedIDNumerical ? "0123456789" : chars;
             var randomID = "";
             var random = _cachedRandom;
+            var length = Program.conf.RandomlyGeneratedIDLength;
 
             do
             {
-                randomID = new string(Enumerable.Repeat(chars, Program.conf.RandomlyGeneratedIDLength)
-                                                        .Select(s => s[random.Next(s.Length)]).ToArray());
+                randomID = new string(Enumerable.Repeat(chars, length).Select(s => s[random.Next(s.Length)]).ToArray());
             }
             while (DoesServerIdExist(randomID));