1 files changed, 46 insertions, 0 deletions
diff --git a/Jellyfin.Server/Migrations/MigrationRunner.cs b/Jellyfin.Server/Migrations/MigrationRunner.cs
new file mode 100644
index 000000000..ad54fa38e
--- /dev/null
+++ b/Jellyfin.Server/Migrations/MigrationRunner.cs
@@ -0,0 +1,46 @@
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Server.Migrations
+{
+    /// <summary>
+    /// The class that knows how migrate between different Jellyfin versions.
+    /// </summary>
+    public static class MigrationRunner
+    {
+        private static readonly IUpdater[] _migrations =
+        {
+            new Pre_10_5()
+        };
+
+        /// <summary>
+        /// Run all needed migrations.
+        /// </summary>
+        /// <param name="host">CoreAppHost that hosts current version.</param>
+        /// <param name="logger">AppHost logger.</param>
+        /// <returns>Whether anything was changed.</returns>
+        public static bool Run(CoreAppHost host, ILogger logger)
+        {
+            bool updated = false;
+            var version = host.ServerConfigurationManager.CommonConfiguration.PreviousVersion;
+
+            for (var i = 0; i < _migrations.Length; i++)
+            {
+                var updater = _migrations[i];
+                if (version.CompareTo(updater.Maximum) >= 0)
+                {
+                    logger.LogDebug("Skipping updater {0} as current version {1} >= its maximum applicable version {2}", updater, version, updater.Maximum);
+                    continue;
+                }
+
+                if (updater.Perform(host, logger, version))
+                {
+                    updated = true;
+                }
+
+                version = updater.Maximum;
+            }
+
+            return updated;
+        }
+    }
+}