{
  config,
  lib,
  pkgs,
  util,
  ...
}:
# Signal desktop messenger.
let
  user = config.user.name;
in
{
  options.modules.desktop.apps.signal.enable = lib.mkEnableOption "Signal desktop messenger";

  config = lib.mkIf config.modules.desktop.apps.signal.enable {
    home-manager.users.${user}.home.packages = [ pkgs.signal-desktop ];

    registry.window-icon.${config.networking.hostName}.signal = {
      class = "[Ss]ignal";
      icon = util.glyph "f4ad";
    };
  };
}