Storage - Keep up to 5 backups of the database

Layouts - Prevent LEDs from going outside the layout bounds

src/Artemis.Storage/StorageManager.cs

@@ -0,0 +1,63 @@
+using System;
+using System.IO;
+using System.Linq;
+using LiteDB;
+
+namespace Artemis.Storage
+{
+    public static class StorageManager
+    {
+        private static bool _inUse;
+
+        /// <summary>
+        ///     Creates a backup of the database if the last backup is older than 10 minutes
+        ///     Removes the oldest backup if there are more than 5 backups present
+        /// </summary>
+        /// <param name="dataFolder">The Artemis data folder</param>
+        public static void CreateBackup(string dataFolder)
+        {
+            if (_inUse)
+                throw new Exception("Storage is already in use, can't backup now.");
+
+            string database = $"{dataFolder}\\database.db";
+            if (!File.Exists(database))
+                return;
+
+            string backupFolder = $"{dataFolder}\\database backups";
+            Directory.CreateDirectory(backupFolder);
+            FileSystemInfo[] files = new DirectoryInfo(backupFolder).GetFileSystemInfos();
+            if (files.Length >= 5)
+            {
+                FileSystemInfo newest = files.OrderByDescending(fi => fi.CreationTime).First();
+                FileSystemInfo oldest = files.OrderBy(fi => fi.CreationTime).First();
+                if (DateTime.Now - newest.CreationTime < TimeSpan.FromMinutes(10))
+                    return;
+
+                oldest.Delete();
+            }
+
+            File.Copy(database, $"{backupFolder}\\database-{DateTime.Now:yyyy-dd-M--HH-mm-ss}.db");
+        }
+
+        /// <summary>
+        ///     Creates the LiteRepository that will be managed by dependency injection
+        /// </summary>
+        /// <param name="dataFolder">The Artemis data folder</param>
+        public static LiteRepository CreateRepository(string dataFolder)
+        {
+            if (_inUse)
+                throw new Exception("Storage is already in use, use dependency injection to get the repository.");
+
+            try
+            {
+                _inUse = true;
+                return new LiteRepository($"FileName={dataFolder}\\database.db");
+            }
+            catch (LiteException e)
+            {
+                // I don't like this way of error reporting, now I need to use reflection if I want a meaningful error message
+                throw new Exception($"LiteDB threw error code {e.ErrorCode}. See inner exception for more details", e);
+            }
+        }
+    }
+}