Resolve WES-117 "Persistent data handling"

Assets/SystemArchitecture/Scripts/SystemController.cs

@@ -0,0 +1,104 @@
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+/// <summary>
+/// SystemController singleton
+/// </summary>
+public class SystemController
+{
+    /// <summary>
+    /// The instance controlling the singleton
+    /// </summary>
+    private static SystemController instance = null;
+
+    /// <summary>
+    /// Stack of the loaded scenes, used to easily go back to previous scenes
+    /// </summary>
+    private Stack<int> sceneStack = new Stack<int>();
+
+    /// <summary>
+    /// Get the instance loaded by the singleton
+    /// </summary>
+    /// <returns>SystemController instance</returns>
+    public static SystemController GetInstance()
+    {
+        // Create a new instance if non exists
+        if (instance == null)
+        {
+            instance = new SystemController();
+            instance.sceneStack.Push(SceneManager.GetActiveScene().buildIndex);
+        }
+        return instance;
+    }
+
+    /// <summary>
+    /// Load the scene and push on the stack
+    /// </summary>
+    /// <param name="scenePath">Path of the scene</param>
+    public void LoadNextScene(string scenePath)
+    {
+        LoadNextScene(SceneUtility.GetBuildIndexByScenePath(scenePath));
+    }
+
+    /// <summary>
+    /// Load the scene and push on the stack
+    /// </summary>
+    /// <param name="sceneIndex">Buildindex of the scene</param>
+    public void LoadNextScene(int sceneIndex)
+    {
+        sceneStack.Push(sceneIndex);
+        SceneManager.LoadScene(sceneIndex);
+    }
+
+    /// <summary>
+    /// Swap the current scene with the new scene on the stack
+    /// </summary>
+    /// <param name="scenePath">Path of the scene</param>
+    public void SwapScene(string scenePath)
+    {
+        SwapScene(SceneUtility.GetBuildIndexByScenePath(scenePath));
+    }
+
+    /// <summary>
+    /// Swap the current scene with the new scene on the stack
+    /// </summary>
+    /// <param name="sceneIndex">Buildindex of the scene</param>
+    public void SwapScene(int sceneIndex)
+    {
+        sceneStack.Pop();
+        LoadNextScene(sceneIndex);
+    }
+
+    /// <summary>
+    /// Go back to the previous scene and unload the current scene
+    /// </summary>
+    public void BackToPreviousScene()
+    {
+        sceneStack.Pop();
+
+        if (sceneStack.Count > 0) SceneManager.LoadScene(sceneStack.Peek());
+        else Application.Quit();
+    }
+
+    /// <summary>
+    /// Go back to a specific scene, unloading all the scenes on the way
+    /// </summary>
+    /// <param name="scenePath">Path of the scene</param>
+    public void BackToScene(string scenePath)
+    {
+        BackToScene(SceneUtility.GetBuildIndexByScenePath(scenePath));
+    }
+
+    /// <summary>
+    /// Go back to a specific scene, unloading all the scene on the way
+    /// </summary>
+    /// <param name="sceneIndex">Buildindex of the scene</param>
+    public void BackToScene(int sceneIndex)
+    {
+        while (0 < sceneStack.Count && sceneStack.Peek() != sceneIndex) sceneStack.Pop();
+
+        if (sceneStack.Count > 0) SceneManager.LoadScene(sceneStack.Peek());
+        else Application.Quit();
+    }
+}