#!/bin/bash
function rotate_ms {
  case $1 in
  "normal")
    swaymsg output eDP-1 transform 0
    ;;
  "right-up")
    swaymsg output eDP-1 transform 90
    ;;
  "bottom-up")
    swaymsg output eDP-1 transform 180
    ;;
  "left-up")
    swaymsg output eDP-1 transform 270
    ;;
  esac
}

while IFS='$\n' read -r line; do
  rotation="$(echo $line | sed -En "s/^.*orientation changed: (.*)/\1/p")"
  [[ ! -z $rotation ]] && rotate_ms $rotation
done < <(stdbuf -oL monitor-sensor)