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Assets/Mirror/Examples/CouchCoop/Scripts/CouchPlayerManager.cs

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+using UnityEngine;
+using Mirror;
+
+namespace Mirror.Examples.CouchCoop
+{
+    public class CouchPlayerManager : NetworkBehaviour
+    {
+        // reference to UI that should be in the scene
+        public CanvasScript canvasScript;
+        // for multiple player prefabs, currently not implemented, remember to add these into Network Managers Prefab array.
+        public GameObject[] playerPrefabs;
+        public int totalCouchPlayers = 0;
+
+        // ignore key controls 0, we will always start at 1
+        public KeyCode[] playerKeyJump;
+        public KeyCode[] playerKeyLeft;
+        public KeyCode[] playerKeyRight;
+
+        // store a list of players so we know which to remove later
+        // can be non sync-list, but may be useful for future features
+        readonly SyncList<GameObject> couchPlayersList = new SyncList<GameObject>();
+
+        public override void OnStartAuthority()
+        {
+            // hook up UI to local player, for cmd communication
+#if UNITY_2022_2_OR_NEWER
+            canvasScript = GameObject.FindAnyObjectByType<CanvasScript>();
+#else
+            // Deprecated in Unity 2023.1
+            canvasScript = GameObject.FindObjectOfType<CanvasScript>();
+#endif
+            canvasScript.couchPlayerManager = this;
+        }
+
+        [Command]
+        public void CmdAddPlayer()
+        {
+            if (totalCouchPlayers >= playerKeyJump.Length-1)
+            {
+                Debug.Log(name + " - No controls setup for further players.");
+                return;
+            }
+
+            totalCouchPlayers += 1;
+            Transform spawnObj = NetworkManager.startPositions[Random.Range(0, NetworkManager.startPositions.Count)];
+            GameObject playerObj = Instantiate(playerPrefabs[0], spawnObj.position, spawnObj.rotation);
+            CouchPlayer couchPlayer = playerObj.GetComponent<CouchPlayer>();
+            couchPlayer.playerNumber = totalCouchPlayers;
+            NetworkServer.Spawn(playerObj, connectionToClient);
+            couchPlayersList.Add(playerObj);
+        }
+
+        [Command]
+        public void CmdRemovePlayer()
+        {
+            if (totalCouchPlayers <= 0)
+            {
+                Debug.Log(name + " - No players to remove for that connection.");
+                return;
+            }
+
+            totalCouchPlayers -= 1;
+            NetworkServer.Destroy(couchPlayersList[couchPlayersList.Count - 1]);
+            couchPlayersList.RemoveAt(couchPlayersList.Count - 1);
+     
+        }
+    }
+
+}