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path: root/sys/seat/default.nix
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{ config, lib, pkgs, ... }:
with lib; let
  cfg = config.local.seat;

  users = filterAttrs;
in
{
  options.local.seat = {
    enable = mkEnableOption "user seat";

    installUsers = mkOption {
      type = types.enum [ "none" "single" "all" ];
    };

    graphical = mkOption {
      type = types.bool;
      default = false;
    };

    wayland = mkOption {
      type = types.bool;
      default = true;
    };

    videoDrivers = mkOption {
      type = with types; listOf str;
    };
  };

  config = mkIf cfg.enable
    (mkMerge [
      (
        let
          users =
            if cfg.installUsers == "all"
            then config.local.users
            else if cfg.installUsers == "single"
            then filterAttrs (_: user: user.sysadmin) config.local.users
            else { };
        in
        {
          hardware = {
            acpilight.enable = true;
            pulseaudio.enable = false;
          };

          security.rtkit.enable = true;

          services.pipewire = {
            enable = true;

            alsa = {
              enable = true;
              support32Bit = true;
            };

            jack.enable = true;
            pulse.enable = true;
            wireplumber.enable = true;
          };

          users = {
            groups = mapAttrs (_: user: { inherit (user) gid; }) users // {
              adbusers.gid = 1008;
            };

            users = mapAttrs
              (username: user: {
                isNormalUser = true;

                inherit (user) uid;
                description = user.gecos;

                group = username;
                extraGroups = [ "users" ] ++ user.groups;

                shell = if user.allowLogin then pkgs.zsh else null;
              })
              users;
          };
        }
      )

      (mkIf cfg.graphical {
        environment = {
          sessionVariables.NIXOS_OZONE_WL = "1";

          systemPackages = with pkgs; [
            qt5.qtwayland
            qt6.qtwayland
          ];
        };

        hardware.graphics.enable = true;

        programs.dconf.enable = true;

        security.pam.services.swaylock = { };

        services = {
          libinput.enable = true;

          udev.packages = with pkgs; [
            pkgs.android-udev-rules
          ];

          xserver = mkIf (!cfg.wayland) {
            enable = true;
            videoDrivers = cfg.videoDrivers ++ [ "modesetting" "fbdev" ];
            displayManager.startx.enable = true;
          };
        };

        xdg.portal = {
          enable = true;
          wlr.enable = true;
          extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
          xdgOpenUsePortal = true;

          # warning: xdg-desktop-portal 1.17 reworked how portal implementations are loaded, you
          # should either set `xdg.portal.config` or `xdg.portal.configPackages`
          # to specify which portal backend to use for the requested interface.
          # 
          # https://github.com/flatpak/xdg-desktop-portal/blob/1.18.1/doc/portals.conf.rst.in
          # 
          # If you simply want to keep the behaviour in < 1.17, which uses the first
          # portal implementation found in lexicographical order, use the following:
          # 
          # xdg.portal.config.common.default = "*";
          config.common.default = "*";
        };

        users.groups.adbusers.gid = 1008;
      })
    ]);
}