Added the Settings system (#179)

InternetTest/InternetTest/App.xaml.cs

@@ -39,6 +39,8 @@ public partial class App : Application
     {
         protected override void OnStartup(StartupEventArgs e)
         {
+            SettingsManager.Load(); // Load settings
+
             Global.ConnectionPage = new(); // Create a new ConnectionPage
             Global.LocalizeIPPage = new(); // Create a new LocalizeIPPage
             Global.DownDetectorPage = new(); // Create a new DownDetectorPage

InternetTest/InternetTest/Classes/Global.cs

@@ -59,6 +59,11 @@ public static class Global
         /// </summary>
         public static SettingsPage SettingsPage { get; set; }
 
+        /// <summary>
+        /// The <see cref="Classes.Settings"/> of InternetTest
+        /// </summary>
+        public static Settings Settings { get; set; }
+
         /// <summary>
         /// The current version of InternetTest.
         /// </summary>

InternetTest/InternetTest/Classes/Settings.cs

@@ -0,0 +1,101 @@
+/*
+MIT License
+
+Copyright (c) Léo Corporation
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE. 
+*/
+using LeoCorpLibrary;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Xml.Serialization;
+
+namespace InternetTest.Classes
+{
+    /// <summary>
+    /// Settings of InternetTest
+    /// </summary>
+    public class Settings
+    {
+        /// <summary>
+        /// True if the theme of InternetTest is set to dark.
+        /// </summary>
+        public bool IsDarkTheme { get; set; }
+
+        /// <summary>
+        /// The language of the app (country code). Can be _default, en-US, fr-FR...
+        /// </summary>
+        public string Language { get; set; }
+    }
+
+    /// <summary>
+    /// Class that contains methods that can manage InternetTest' settings.
+    /// </summary>
+    public static class SettingsManager
+    {
+        /// <summary>
+        /// Loads InternetTest settings.
+        /// </summary>
+        public static void Load()
+        {
+            string path = Env.AppDataPath + @"\Léo Corporation\InternetTest\Settings.xml"; // The path of the settings file
+
+            if (File.Exists(path)) // If the file exist
+            {
+                XmlSerializer xmlSerializer = new XmlSerializer(typeof(Settings)); // XML Serializer
+                StreamReader streamReader = new StreamReader(path); // Where the file is going to be read
+
+                Global.Settings = (Settings)xmlSerializer.Deserialize(streamReader); // Read
+
+                streamReader.Dispose();
+            }
+            else
+            {
+                Global.Settings = new Settings { IsDarkTheme = false, Language = "_default" }; // Create a new settings file
+
+                Save(); // Save the changes
+            }
+        }
+
+        /// <summary>
+        /// Saves InternetTest settings.
+        /// </summary>
+        public static void Save()
+        {
+            string path = Env.AppDataPath + @"\Léo Corporation\InternetTest\Settings.xml"; // The path of the settings file
+
+            XmlSerializer xmlSerializer = new XmlSerializer(typeof(Settings)); // Create XML Serializer
+
+            if (!Directory.Exists(Env.AppDataPath + @"\Léo Corporation\InternetTest")) // If the directory doesn't exist
+            {
+                Directory.CreateDirectory(Env.AppDataPath + @"\Léo Corporation\"); // Create the directory
+                Directory.CreateDirectory(Env.AppDataPath + @"\Léo Corporation\InternetTest"); // Create the directory
+            }
+
+            StreamWriter streamWriter = new StreamWriter(path); // The place where the file is going to be written
+            xmlSerializer.Serialize(streamWriter, Global.Settings);
+
+            streamWriter.Dispose();
+        }
+    }
+}