keylight_screensaver.sh

#!/bin/bash

# Script to watch for dbus events and turn off keylight when monitor screen dims
# Adapted from: https://askubuntu.com/questions/858236/how-do-i-call-dbus-code-that-monitors-when-screen-is-locked-unlocked
# TODO set it up to store previous state when it turns off and restore that state after
# Apache2

# there are a lot of utils out there to control these things, so at least attempt to be portable
export KEYLIGHT_CMD_ON="keylightctl switch -light 7F8C -brightness 3 -temperature 200 on"
export KEYLIGHT_CMD_OFF="/home/nibz/local/bin/keylightctl switch -light 7F8C off"

dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver'" | \
(
    while read event
    do
        if $(echo ${event} | grep -q 'boolean false'); then
            echo "lights on!"
            $KEYLIGHT_CMD_ON
        fi
        if $(echo ${event} | grep -q 'boolean true'); then
            echo "lights off!"
            $KEYLIGHT_CMD_OFF

        fi
    done
)