Adding input sanitization for join code

Author: LPLafontaineB

Assets/BossRoom/Prefabs/UI/LobbyUI.prefab

@@ -975,7 +975,20 @@ MonoBehaviour:
       m_Calls: []
   m_OnValueChanged:
     m_PersistentCalls:
-      m_Calls: []
+      m_Calls:
+      - m_Target: {fileID: 3432713757992463987}
+        m_TargetAssemblyTypeName: Unity.Multiplayer.Samples.BossRoom.Visual.LobbyJoiningUI,
+          Unity.Multiplayer.Samples.BossRoom.Client
+        m_MethodName: SanitizeJoinCodeInputText
+        m_Mode: 1
+        m_Arguments:
+          m_ObjectArgument: {fileID: 0}
+          m_ObjectArgumentAssemblyTypeName: UnityEngine.Object, UnityEngine
+          m_IntArgument: 0
+          m_FloatArgument: 0
+          m_StringArgument: 
+          m_BoolArgument: 0
+        m_CallState: 2
   m_CaretColor: {r: 0.19607843, g: 0.19607843, b: 0.19607843, a: 1}
   m_CustomCaretColor: 0
   m_SelectionColor: {r: 0.65882355, g: 0.80784315, b: 1, a: 0.7529412}
@@ -4298,7 +4311,7 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 20.3
+  m_fontSize: 33
   m_fontSizeBase: 36
   m_fontWeight: 400
   m_enableAutoSizing: 1
@@ -5105,7 +5118,7 @@ MonoBehaviour:
   m_faceColor:
     serializedVersion: 2
     rgba: 4294967295
-  m_fontSize: 20.3
+  m_fontSize: 33
   m_fontSizeBase: 36
   m_fontWeight: 400
   m_enableAutoSizing: 1

Assets/BossRoom/Scripts/Client/UI/Lobby/LobbyJoiningUI.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Text.RegularExpressions;
 using Unity.Multiplayer.Samples.BossRoom.Shared.Infrastructure;
 using Unity.Multiplayer.Samples.BossRoom.Shared.Net.UnityServices.Lobbies;
 using UnityEngine;
@@ -23,6 +24,9 @@ public class LobbyJoiningUI : MonoBehaviour
         IDisposable m_Subscriptions;
         List<LobbyListItemUI> m_LobbyListItems = new List<LobbyListItemUI>();
 
+        // Adding this here until it is available in the Lobby package itself
+        const string k_LobbyJoinCodeAlphabet = "ACDEFGHJKMNPRTWXY3467";
+
         void Awake()
         {
             m_LobbyListItemPrototype.gameObject.SetActive(false);
@@ -57,9 +61,22 @@ void InjectDependenciesAndInitialize(
             m_Subscriptions = localLobbiesRefreshedSub.Subscribe(UpdateUI);
         }
 
+        /// <summary>
+        /// Added to the InputField component's OnValueChanged callback for the join code text.
+        /// </summary>
+        public void SanitizeJoinCodeInputText()
+        {
+            m_JoinCodeField.text = SanitizeJoinCode(m_JoinCodeField.text);
+        }
+
+        string SanitizeJoinCode(string dirtyString)
+        {
+            return Regex.Replace(dirtyString.ToUpper(), $"[^{k_LobbyJoinCodeAlphabet}]", "");
+        }
+
         public void OnJoinButtonPressed()
         {
-            m_LobbyUIMediator.JoinLobbyWithCodeRequest(m_JoinCodeField.text.ToUpper());
+            m_LobbyUIMediator.JoinLobbyWithCodeRequest(SanitizeJoinCode(m_JoinCodeField.text));
         }
 
         void PeriodicRefresh(float _)