1 files changed, 66 insertions, 0 deletions
diff --git a/Jellyfin.Server/ServerSetupApp/IStartupLogger.cs b/Jellyfin.Server/ServerSetupApp/IStartupLogger.cs
new file mode 100644
index 000000000..e7c193936
--- /dev/null
+++ b/Jellyfin.Server/ServerSetupApp/IStartupLogger.cs
@@ -0,0 +1,66 @@
+using System;
+using ILogger = Microsoft.Extensions.Logging.ILogger;
+
+namespace Jellyfin.Server.ServerSetupApp;
+
+/// <summary>
+/// Defines the Startup Logger. This logger acts an an aggregate logger that will push though all log messages to both the attached logger as well as the startup UI.
+/// </summary>
+public interface IStartupLogger : ILogger
+{
+    /// <summary>
+    /// Gets the topic this logger is assigned to.
+    /// </summary>
+    StartupLogTopic? Topic { get; }
+
+    /// <summary>
+    /// Adds another logger instance to this logger for combined logging.
+    /// </summary>
+    /// <param name="logger">Other logger to rely messages to.</param>
+    /// <returns>A combined logger.</returns>
+    IStartupLogger With(ILogger logger);
+
+    /// <summary>
+    /// Opens a new Group logger within the parent logger.
+    /// </summary>
+    /// <param name="logEntry">Defines the log message that introduces the new group.</param>
+    /// <returns>A new logger that can write to the group.</returns>
+    IStartupLogger BeginGroup(FormattableString logEntry);
+
+    /// <summary>
+    /// Adds another logger instance to this logger for combined logging.
+    /// </summary>
+    /// <param name="logger">Other logger to rely messages to.</param>
+    /// <returns>A combined logger.</returns>
+    /// <typeparam name="TCategory">The logger cateogry.</typeparam>
+    IStartupLogger<TCategory> With<TCategory>(ILogger logger);
+
+    /// <summary>
+    /// Opens a new Group logger within the parent logger.
+    /// </summary>
+    /// <param name="logEntry">Defines the log message that introduces the new group.</param>
+    /// <returns>A new logger that can write to the group.</returns>
+    /// <typeparam name="TCategory">The logger cateogry.</typeparam>
+    IStartupLogger<TCategory> BeginGroup<TCategory>(FormattableString logEntry);
+}
+
+/// <summary>
+/// Defines a logger that can be injected via DI to get a startup logger initialised with an logger framework connected <see cref="ILogger"/>.
+/// </summary>
+/// <typeparam name="TCategory">The logger cateogry.</typeparam>
+public interface IStartupLogger<TCategory> : IStartupLogger
+{
+    /// <summary>
+    /// Adds another logger instance to this logger for combined logging.
+    /// </summary>
+    /// <param name="logger">Other logger to rely messages to.</param>
+    /// <returns>A combined logger.</returns>
+    new IStartupLogger<TCategory> With(ILogger logger);
+
+    /// <summary>
+    /// Opens a new Group logger within the parent logger.
+    /// </summary>
+    /// <param name="logEntry">Defines the log message that introduces the new group.</param>
+    /// <returns>A new logger that can write to the group.</returns>
+    new IStartupLogger<TCategory> BeginGroup(FormattableString logEntry);
+}