fix-output

#!/usr/bin/env bash

home_monitor() {
  echo "Setting single monitor">/dev/stderr
  xrandr \
    --output DP-1 --primary --mode 3840x2160 --pos 0x0 --rotate normal \
    --output eDP-1 --off \
    --output HDMI-1 --off \
    --output DP-2 --off \
    --output HDMI-2 --off
}
export -f home_monitor

emergency_home_monitor() {
  echo "Setting single monitor">/dev/stderr
  xrandr \
    --output HDMI-2 --primary --mode 3840x2160 --pos 0x0 --rotate normal \
    --output eDP-1 --off \
    --output HDMI-1 --off \
    --output DP-2 --off \
    --output DP-1 --off
}
export -f emergency_home_monitor

laptop_screen() {
  echo "Setting single laptop screen">/dev/stderr
  xrandr \
    --output eDP-1 --primary --mode 1920x1080 --pos 0x0 --rotate normal \
    --output DP-1 --off \
    --output HDMI-1 --off \
    --output DP-2 --off \
    --output HDMI-2 --off
}
export -f laptop_screen

check_state() {
  xrandr --query | awk '
    $2 == "connected"{
      mons[$1]++
    }
    END {
      if ("eDP-1" in mons && length(mons) == 1) {
        print("laptop_screen")
      } else if ("DP-1" in mons) {
        print("home_monitor")
      } else if ("HDMI-2" in mons) {
        print("emergency_home_monitor")
      } else {
        print("Do not know what to do") > "/dev/stderr"
      }
    }'
}

fix_state() {
  if [[ -z "$last_exec_time" ]] || (( last_exec_time + 2 < EPOCHSECONDS )); then
    echo "Fixing state" >/dev/stderr
    bash -c "$(check_state)"
    last_exec_time="$EPOCHSECONDS"
  else
    echo "Last change was too recent, not actioning reported state change" >/dev/stderr
  fi
}

fix_state
while IFS= read -r line; do
  echo "Change reported" >/dev/stderr
  fix_state
done < <(
  i3-msg -t subscribe -m '[ "output" ]'
)