#!/bin/sh
# shellcheck disable=2034
coded_by='

In the name of Allah, the most Gracious, the most Merciful.

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░▓ Author ▓ Abdullah <https://abdullah.today>
░▓▓▓▓▓▓▓▓▓▓ YouTube <https://YouTube.com/AbdullahToday>
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'

# A shell script which dims the screen. Its a part of my BSPWM setup which uses
# xss-lock, i3lock and this script. Example to append in ~/.xprofile
# `xset s 30 60 &; xss-lock -n this_script -- i3lock -n`
# It will dim the screen's brightness with a fade after 30 seconds inactivity,
# locks the screen after 60 seconds and turn the screen off.

light -O

brighten() {
        light -I
}

fade() {
    i=$(light -G | cut -d "." -f 1)
    if [ "$i" -eq 0 ]; then
        return
    else
        until [ "$((i-=1))" -eq 0 ]; do
            light -S "$i"
            sleep 0.01
        done
    fi
}

fade
trap 'exit 0' TERM INT
trap "brighten; kill %%" EXIT
fade
sleep 2147483647 &
wait
