system/users/modules/window_manager/polybar.nix

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

with lib;

let
  inherit (config.services.polybar) package;

  # TODO: create a theme
  colors = {
    orange = "#ee9a00";
    red = "#ff5555";
    green = "#50fa7b";
  };

in
{
  systemd.user.services.polybar = {
    # Add additional /usr/bin to run custom scripts
    Service.Environment = mkForce "PATH=${package}/bin:/run/current-system/sw/bin";
  };

  services.polybar = {
    enable = true;
    script = "MONITOR=$(xrandr | grep \"connected primary\" | awk '{print $1;}') polybar &";
    settings =
      let
        mkWifi = interface: {
          type = "internal/network";
          interval = 3;
          interface = {
            text = interface;
            type = "wireless";
          };
          label.connected = "%essid% %signal%";
          format.connected = {
            prefix = "| ";
            suffix = "%";
          };
        };

        padding = 1;
      in
      {
        "bar/main" = {
          monitor = "\${env:MONITOR:DisplayPort-1}";
          width = "100%";
          height = "20px";
          font = [
            "Fira Code:size=9:antialias=true"
            "Fira Code:bold:size=9:antialias=true"
            "FiraCode Nerd Font Mono:size=9:antialias=true"
            "FiraCode Nerd Font Mono:size=14:antialias=true"
          ];
          radius = 0;
          modules = {
            left = "xmonad";
            center = "date wifi_home wifi_laptop";
            right = "exchangerate volume battery lang time";
          };
        };

        "module/date" = {
          type = "internal/date";
          interval = 10;
          date = "%a %d %b %Y";
          label = "%date%";
          format = { inherit padding; };
        };

        "module/time" = {
          type = "internal/date";
          time = "%H:%M:%S";
          label = {
            text = "%time%";
            font = 2;
            foreground = colors.orange;
          };
        };

        "module/lang" = {
          type = "internal/xkeyboard";
          format = {
            inherit padding;
            text = "<label-layout>";
          };
          label.layout.font = 2;
        };

        "module/volume" = {
          type = "custom/script";
          exec = "~/scripts/get_volume.sh";
          interval = 1;
          format = {
            inherit padding;
            prefix = "%{T4}%{T-} ";
          };
        };

        "module/battery" = {
          type = "internal/battery";
          full-at = 99;
          low-at = 10;
          battery = "BAT0";
          adapter = "AC0";

          format.charging = {
            inherit padding;
            text = "%{T3}%{T-} <label-charging>";
            foreground = colors.green;
          };

          format.discharging = {
            inherit padding;
            text = "%{T3}<ramp-capacity>%{T-} <label-discharging>";
            foreground = colors.orange;
          };

          format.full = {
            inherit padding;
            text = "%{T3}%{T-} <label-full>";
            foreground = colors.green;
          };

          format.low = {
            inherit padding;
            text = "%{T3}%{T-} <label-low>";
            foreground = colors.red;
          };

          # Only applies if <ramp-capacity> is used
          ramp.capacity = [ "" "" "" "" "" ];
        };

        "module/wifi_home" = mkWifi "wlp11s0f3u2";
        "module/wifi_laptop" = mkWifi "wlp2s0";

        "module/xmonad" = mkIf config.xsession.windowManager.xmonad.enable {
          type = "custom/script";
          exec = "${pkgs.xmonad-log}/bin/xmonad-log";
          tail = true;
        };

        "module/exchangerate" = {
          type = "custom/script";
          exec = "~/scripts/exchangerate.sh";
          interval = 60;
          format = {
            inherit padding;
            prefix = "USD: ";
          };
        };

        "global/wm" = {
          margin = {
            bottom = 0;
            top = 0;
          };
        };
      }
    ;
  };
}