Add options de- and se-rialization

Assets/Scripts/Options.cs

@@ -1,19 +1,46 @@
-using System.Collections;
+using UnityEngine;
-using System.Collections.Generic;
+using System.IO;
-using UnityEngine;
+using System;
+using System.Xml.Serialization;
 
 namespace NeonTea.Quakeball {
     /// <summary>Container for user-selected options.</summary>
+    [XmlRootAttribute("Options")]
     public class OptionsData {
+        // DO NOT REMOVE OR CHANGE EXISTING FIELDS AFTER RELEASE TO AVOID BREAKING EXISTING CONFIGURATIONS
+        // New fields are fine though, the defaults will be used.
         public bool InvertVerticalLook = false;
-        public float LookSensitivity = 0.15f;
+        public float LookSensitivity = 0.1f;
     }
 
-    public class Options : MonoBehaviour {
+    /// <summary>A collection of functions to access user-specific configuration.</summary>
-        private static OptionsData Singleton = new OptionsData();
+    public static class Options {
+        private static string OptionsDirectory = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Quakeball");
+        private static string OptionsPath = Path.Combine(OptionsDirectory, "Config.xml");
+        private static OptionsData Singleton = Load();
 
         public static OptionsData Get() {
             return Singleton;
         }
+
+        public static void Save(OptionsData options) {
+            XmlSerializer Serializer = new XmlSerializer(typeof(OptionsData));
+            Directory.CreateDirectory(OptionsDirectory);
+            FileStream OptionsFile = File.Create(OptionsPath);
+            Serializer.Serialize(OptionsFile, options);
+            OptionsFile.Close();
+        }
+
+        public static OptionsData Load() {
+            try {
+                XmlSerializer Serializer = new XmlSerializer(typeof(OptionsData));
+                FileStream OptionsFile = File.OpenRead(OptionsPath);
+                OptionsData Options = (OptionsData)Serializer.Deserialize(OptionsFile);
+                OptionsFile.Close();
+                return Options;
+            } catch (Exception) {
+                return new OptionsData();
+            }
+        }
     }
 }