Resolve WES-56 "Account switching"

Assets/Accounts/Scripts/ChangeUserScreen.cs

@@ -0,0 +1,90 @@
+using System.Collections.Generic;
+using TMPro;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using UnityEngine.UI;
+
+public class ChangeUserScreen : MonoBehaviour
+{
+    /// <summary>
+    /// Prefab of the user selection
+    /// </summary>
+    public GameObject userPrefab;
+
+    /// <summary>
+    /// Reference to the container to list all users
+    /// </summary>
+    public Transform usersContainer;
+
+    /// <summary>
+    /// Reference to the user list
+    /// </summary>
+    public UserList userList;
+
+    /// <summary>
+    /// Index of the current selected user in the UserList
+    /// </summary>
+    private int currentUserIndex;
+
+    /// <summary>
+    /// List of references to avatar background sprites (so we can color them nicely)
+    /// </summary>
+    private List<Image> userBackgrounds = new List<Image>();
+
+    /// <summary>
+    /// Start is called before the first frame update
+    /// </summary>
+    void Start()
+    {
+        List<User> users = userList.GetUsers();
+        currentUserIndex = userList.GetCurrentUserIndex();
+        for (int i = 0; i < users.Count; i++)
+        {
+            User user = users[i];
+
+            // Create instance of prefab
+            GameObject instance = GameObject.Instantiate(userPrefab, usersContainer);
+
+            // Store value of i so we can use it the callback (else it would get the value of sprites.Count)
+            int x = i;
+            // Add onClick callback
+            instance.GetComponent<Button>().onClick.AddListener(() => UpdateSelection(x));
+            // Set username
+            instance.GetComponentInChildren<TMP_Text>().text = user.username;
+
+            // Store reference to image for fancy coloring
+            Image background = instance.GetComponent<Image>();
+            userBackgrounds.Add(background);
+            // Set background color
+            background.color = i == currentUserIndex ? Color.blue : Color.gray;
+            // Find correct component for setting the sprite
+            foreach (Image img in background.GetComponentsInChildren<Image>())
+                if (img != background)
+                {
+                    img.sprite = user.avatar;
+                    break;
+                }
+        }
+    }
+
+    /// <summary>
+    /// Update the current selected user
+    /// </summary>
+    /// <param name="index">Index to the user in the <c>this.userBackgrounds</c> list</param>
+    private void UpdateSelection(int index)
+    {
+        userBackgrounds[currentUserIndex].color = Color.gray;
+        currentUserIndex = index;
+        userBackgrounds[currentUserIndex].color = Color.blue;
+    }
+
+    /// <summary>
+    /// Select the current selected user and return to the StartScreenScene
+    /// </summary>
+    public void IChooseYou()
+    {
+        userList.ChangeCurrentUser(currentUserIndex);
+        userList.Save();
+        SceneManager.LoadScene("Common/Scenes/StartScreen");
+    }
+}