From 22da56ff4a0417cc057b77b6f023b545e86b1ac4 Mon Sep 17 00:00:00 2001
From: Scott Scoble <scott@scoble.me>
Date: Fri, 15 May 2026 21:55:10 -0700
Subject: [PATCH] feat: add NixOS module for Jellyfin integration

Add nixosModules.default with:
- services.jellyfin-lessons.enable toggle
- Configurable dataDir and adminPort options
- Plugin DLL auto-copy to Jellyfin plugins dir
- Admin UI as a user systemd service

The projectFile path was already correct (Jellyfin.Plugin.Lessons.csproj).
nix flake check passes.
---
 flake.nix | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/flake.nix b/flake.nix
index 2645a68..114ed09 100644
--- a/flake.nix
+++ b/flake.nix
@@ -68,5 +68,50 @@
           ) { };
         }
       );
+
+      nixosModules.default =
+        { config, lib, pkgs, ... }:
+        let
+          cfg = config.services.jellyfin-lessons;
+        in
+        {
+          options.services.jellyfin-lessons = {
+            enable = lib.mkEnableOption "Jellyfin Lessons plugin";
+            dataDir = lib.mkOption {
+              type = lib.types.str;
+              default = "/var/lib/jellyfin-lessons";
+              description = "Directory for lessons database";
+            };
+            adminPort = lib.mkOption {
+              type = lib.types.port;
+              default = 3099;
+              description = "Port for admin UI";
+            };
+          };
+
+          config = lib.mkIf cfg.enable {
+            # Copy plugin DLL to Jellyfin plugins directory on jellyfin preStart
+            systemd.services.jellyfin = {
+              preStart = let
+                pluginPkg = self.packages.${pkgs.system}.default;
+              in ''
+                mkdir -p /var/lib/jellyfin/plugins/Lessons
+                cp -f ${pluginPkg}/lib/jellyfin-lessons/*.dll /var/lib/jellyfin/plugins/Lessons/
+              '';
+            };
+
+            # Admin UI as a user systemd service
+            systemd.user.services.jellyfin-lessons-admin = {
+              description = "Jellyfin Lessons Admin UI";
+              after = [ "network.target" ];
+              wantedBy = [ "default.target" ];
+              serviceConfig = {
+                ExecStart = "${pkgs.nodejs}/bin/node ${self}/admin-ui/server.js";
+                Restart = "on-failure";
+                Environment = "PORT=${toString cfg.adminPort}";
+              };
+            };
+          };
+        };
     };
 }
-- 
2.49.1