alqueva/computers/shared/fonts.nix

{
  config,
  pkgs,
  lib,
  ...
}: let
  cfg = config.alqueva.fonts;
  inherit (lib) types mkOption;
  mkStringsOption = default: letterform:
    mkOption {
      type = types.listOf types.str;
      inherit default;
      description = "Which ${letterform} font packages you want to use.";
    };
in {
  options.alqueva.fonts = {
    enable = lib.mkEnableOption "" // {description = "Whether you want to use this fonts module.";};
    packages = mkOption {
      type = types.listOf types.package;
      default = [pkgs.roboto pkgs.roboto-serif pkgs.roboto-mono pkgs.noto-fonts-color-emoji];
      description = "Packages related to fonts to be installed.";
    };
    names = builtins.mapAttrs (_n: v: mkStringsOption v.default v.letterform) {
      sansSerif = {
        default = ["Roboto"];
        letterform = "sans-serif";
      };
      monospace = {
        default = ["Roboto Mono"];
        letterform = "monospace";
      };
      serif = {
        default = ["Roboto Serif"];
        letterform = "serif";
      };
      emoji = {
        default = ["Noto Color Emoji"];
        letterform = "emoji";
      };
    };
  };
  config = lib.mkIf cfg.enable {
    fonts = {
      inherit (cfg) packages;
      fontconfig = {
        defaultFonts = {
          inherit (cfg.names) sansSerif monospace serif emoji;
        };
        enable = true;
      };
    };
  };
}