rpi4: add media sync systemd timer

hosts/rpi4/configuration.nix

@@ -10,6 +10,8 @@
       ./hardware-configuration.nix
       ./services.nix
 
+      ./media-sync.nix
+
       ./backup.nix
     ];
 

hosts/rpi4/media-sync.nix

@@ -0,0 +1,52 @@
+{ config, lib, pkgs, ... }:
+let
+in {
+  config = {
+    nixfiles.programs.syncthing.enable = true;
+
+
+    systemd.timers.gallery-dl = {
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnBootSec = "5m";
+        OnUnitActiveSec = "13";
+        RandomizedDelaySec = "4m";
+      };
+    };
+    systemd.services.gallery-dl = {
+      script = ''
+        PATH=${with pkgs; lib.escapeShellArg (lib.makeBinPath [ bash coreutils findutils gallery-dl ])}
+        export PATH
+
+        # none of your fucking business
+        # TODO move this into an agenix secret probably
+        exec /srv/gallery-dl.sh
+      '';
+
+      serviceConfig = {
+        Type = "oneshot";
+        User = "nullbite";
+      };
+    };
+
+    systemd.timers.gallery-dl-dedup = {
+      wantedBy = [ "timers.target" ];
+      timerConfig = {
+        OnCalendar = "03:00";
+        RandomizedDelaySec = "3h";
+      };
+    };
+    systemd.services.gallery-dl-dedup = {
+      script = ''
+        PATH=${with pkgs; lib.escapeShellArg (lib.makeBinPath [ coreutils rmlint ])}
+        export PATH
+
+        exec /srv/gallery-dl-dedup.sh
+      '';
+      serviceConfig = {
+        Type = "oneshot";
+        User = "nullbite";
+      };
+    };
+  };
+}