home-manager/modules/services/stalonetray.nix

{ config, lib, pkgs, ... }:

with lib;

let

  cfg = config.services.stalonetray;

in

{
  options = {
    services.stalonetray = {
      enable = mkEnableOption "Stalonetray system tray";

      package = mkOption {
        default = pkgs.stalonetray;
        defaultText = literalExample "pkgs.stalonetray";
        type = types.package;
        example = literalExample "pkgs.stalonetray";
        description = "The package to use for the Stalonetray binary.";
      };

      config = mkOption {
          type = with types;
            attrsOf (nullOr (either str (either bool int)));
          description = ''
            Stalonetray configuration as a set of attributes.
          '';
          default = {};
          example = {
            geometry = "3x1-600+0";
            decorations = null;
            icon_size = 30;
            sticky = true;
            background = "#cccccc";
          };
      };

      extraConfig = mkOption {
        type = types.lines;
        description = "Additional configuration lines for stalonetrayrc.";
        default = "";
        example = ''
            geometry 3x1-600+0
            decorations none
            icon_size 30
            sticky true
            background "#cccccc"
        '';
      };
    };
  };

  config = mkIf cfg.enable (mkMerge [
    {
      home.packages = [ cfg.package ];

      systemd.user.services.stalonetray = {
        Unit = {
          Description = "Stalonetray system tray";
          After = [ "graphical-session-pre.target" ];
          PartOf = [ "graphical-session.target" ];
        };

        Install = {
          WantedBy = [ "graphical-session.target" ];
        };

        Service = {
          ExecStart = "${cfg.package}/bin/stalonetray";
          Restart = "on-failure";
        };
      };
    }

    (mkIf (cfg.config != {}) {
      home.file.".stalonetrayrc".text =
        let
          valueToString = v:
            if isBool v then (if v then "true" else "false")
            else if (v==null) then "none"
            else ''"${toString v}"'';
        in
          concatStrings (
            mapAttrsToList (k: v: "${k} ${valueToString v}\n") cfg.config
          );
    })

    (mkIf (cfg.extraConfig != "") {
      home.file.".stalonetrayrc".text = cfg.extraConfig;
    })
  ]);
}