nixpkgs/nixos/modules/programs/kdeconnect.nix

{ config, pkgs, lib, ... }:
{
  options.programs.kdeconnect = {
    enable = lib.mkEnableOption ''
      kdeconnect.

      Note that it will open the TCP and UDP port from
      1714 to 1764 as they are needed for it to function properly.
      You can use the {option}`package` to use
      `gnomeExtensions.gsconnect` as an alternative
      implementation if you use Gnome
    '';
    package = lib.mkPackageOption pkgs [ "plasma5Packages" "kdeconnect-kde" ] {
      example = "gnomeExtensions.gsconnect";
    };
  };
  config =
    let
      cfg = config.programs.kdeconnect;
    in
      lib.mkIf cfg.enable {
        environment.systemPackages = [
          cfg.package
        ];
        networking.firewall = rec {
          allowedTCPPortRanges = [ { from = 1714; to = 1764; } ];
          allowedUDPPortRanges = allowedTCPPortRanges;
        };
      };
}