Nomarchy/modules/home/airplane.nix

# Airplane mode — runtime kill-switch for Wi-Fi + Bluetooth together.
# Remembers each radio's prior state so disengage restores what you had
# (if Wi-Fi was already off, it stays off). Waybar shows a plane glyph
# only while engaged (status prints nothing otherwise → self-hides).
#
# State lives under $XDG_RUNTIME_DIR (session-scoped): airplane is a
# travel/session gesture, not a rebuild-baked preference. Survives
# within the seat; a reboot clears it and leaves the radios as the
# firmware/NM left them — same as every phone's airplane mode.
{ config, lib, pkgs, ... }:

let
  # signal 11: poke the bar on toggle so the glyph appears/vanishes
  # without waiting for the poll interval (same pattern as recording=8,
  # updates=9, doctor=10).
  waybarSignal = 11;

  nomarchy-airplane = pkgs.writeShellScriptBin "nomarchy-airplane" ''
    set -euo pipefail
    rt="''${XDG_RUNTIME_DIR:-/run/user/$(id -u)}"
    state_file="$rt/nomarchy-airplane.state"
    PATH=${lib.makeBinPath [ pkgs.networkmanager pkgs.util-linux pkgs.bluez pkgs.coreutils pkgs.gnugrep pkgs.gawk pkgs.libnotify pkgs.procps ]}:$PATH

    poke_bar() {
      pkill -RTMIN+${toString waybarSignal} waybar 2>/dev/null || true
    }

    wifi_enabled() {
      [ "$(nmcli -t -f WIFI g 2>/dev/null || echo disabled)" = "enabled" ]
    }

    # Soft-blocked means "we (or something) turned it off in software".
    # Hard-blocked is a laptop kill-switch — we never try to fight that.
    bt_soft_unblocked() {
      rfkill list bluetooth 2>/dev/null | ${pkgs.gnugrep}/bin/grep -q 'Soft blocked: no'
    }

    bt_powered() {
      bluetoothctl show 2>/dev/null | ${pkgs.gnugrep}/bin/grep -q 'Powered: yes'
    }

    # "Bluetooth was usable" = adapter present and not soft-blocked (or
    # already powered). Desktops without BT leave this false.
    bt_was_on() {
      ls /sys/class/bluetooth/hci* >/dev/null 2>&1 || return 1
      bt_powered || bt_soft_unblocked
    }

    engaged() { [ -f "$state_file" ]; }

    engage() {
      if engaged; then
        notify-send -a Nomarchy "Airplane mode" "Already on."
        exit 0
      fi
      wifi_prior=0
      bt_prior=0
      wifi_enabled && wifi_prior=1
      bt_was_on && bt_prior=1

      # Wi-Fi via NetworkManager so nm-applet/waybar stay consistent;
      # fall back to rfkill if nmcli is missing (shouldn't happen on
      # a Nomarchy desktop).
      if command -v nmcli >/dev/null 2>&1; then
        nmcli radio wifi off 2>/dev/null || true
      else
        rfkill block wlan 2>/dev/null || true
      fi
      # Bluetooth: soft-block the radio (covers adapters that ignore
      # bluetoothctl) and ask the daemon to power off when present.
      rfkill block bluetooth 2>/dev/null || true
      bluetoothctl power off >/dev/null 2>&1 || true

      printf 'wifi_prior=%s\nbt_prior=%s\n' "$wifi_prior" "$bt_prior" > "$state_file"
      poke_bar
      notify-send -a Nomarchy "Airplane mode" "On — Wi-Fi and Bluetooth off."
    }

    disengage() {
      if ! engaged; then
        notify-send -a Nomarchy "Airplane mode" "Already off."
        exit 0
      fi
      # shellcheck disable=SC1090
      . "$state_file"
      wifi_prior=''${wifi_prior:-0}
      bt_prior=''${bt_prior:-0}

      if [ "$wifi_prior" = 1 ]; then
        if command -v nmcli >/dev/null 2>&1; then
          nmcli radio wifi on 2>/dev/null || true
        else
          rfkill unblock wlan 2>/dev/null || true
        fi
      fi
      if [ "$bt_prior" = 1 ]; then
        rfkill unblock bluetooth 2>/dev/null || true
        bluetoothctl power on >/dev/null 2>&1 || true
      fi

      rm -f "$state_file"
      poke_bar
      notify-send -a Nomarchy "Airplane mode" "Off — prior radio state restored."
    }

    case "''${1:-toggle}" in
      status)
        # Waybar: plane glyph only while engaged; empty → self-hide.
        if engaged; then
          printf '{"text":"󰀝","tooltip":"Airplane mode on — Wi-Fi and Bluetooth off (click to restore)","class":"on"}\n'
        fi
        exit 0 ;;
      is-active)
        if engaged; then echo on; else echo off; fi ;;
      on) engage ;;
      off) disengage ;;
      toggle)
        if engaged; then disengage; else engage; fi ;;
      *)
        echo "usage: nomarchy-airplane [toggle|status|on|off|is-active]" >&2
        exit 64 ;;
    esac
  '';
in
{
  config = {
    home.packages = [ nomarchy-airplane ];
  };
}