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Improved logic for sun status

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Sayantan Santra 2022-07-27 23:45:05 -05:00
parent e909ec779a
commit 3645aec07c
1 changed files with 23 additions and 18 deletions
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41
brightness-by-daylight.sh
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@ -16,7 +16,7 @@
# just run this script one manually to set it up to run perpetually (hopefully) using 'at'
# (some distros don't come with 'at' preinstalled, so you might need to install 'at' and enable the 'atd' service.)
# it might also be a good idea to add '<location-of-this-script> scheduler wait' to your DE's autostart list, or to '.profile' so that it launches on system login
# it might also be a good idea to add '<location-of-this-script> scheduler' to your DE's autostart list, or to '.profile' so that it launches on system login
# (sometimes I forget to turn on the monitor when I start my PC, so this is better than having a crontab)
# location of the config file
@ -30,33 +30,38 @@ else
exit
fi
# sometimes we need to wait a minute so that the next schedule is set up properly (or sunwait reports day/night in a misleading way)
[ "$2" == "wait" ] && echo "Waiting 60 seconds..." && sleep 60
# get sun status
sun_status=$(sunwait poll $latitude $longitude)
[ $sun_status == "DAY" ] && target=$high || target=$low
# do the brightness adjustment using ddcutil
ddcutil setvcp 10 $target
echo "Monitor brightness set to $target%, since it's $(echo $sun_status | tr '[:upper:]' '[:lower:]') time"
# check if we want to access the scheduler. If yes, create a schedule using `at`
if [ "$1" == "scheduler" ]; then
if [ $sun_status == "DAY" ]; then
time_next=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $6}')
else
time_next=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $4}')
fi
# get the timings for twilight events and current time
sunrise_time=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $4}')
sunset_time=$(sunwait report 35.221050N 97.445938W | grep "Daylight:" | awk '{print $6}')
now_time=$(date "+%H:%M")
# try to figure out if it's twilight right now, then need to adjust sun_status
[ $sunrise_time == $now_time ] && sun_status="DAY"
[ $sunset_time == $now_time ] && sun_status="NIGHT"
# figure out the time of the next twilight
[ $sun_status == "DAY" ] && time_next=$sunset_time || time_next=$sunrise_time
# query all `at` tasks
task_list=$(atq | grep $time_next | awk '{print $1}')
# loop through all `at` entries to see if a task already exists
flag=true
for item in $task_list
do
[ "$(at -c $item | sed 'x;$!d')" == "$scriptdir/brightness-by-daylight.sh scheduler wait" ] && flag=false
[ "$(at -c $item | sed 'x;$!d')" == "$scriptdir/brightness-by-daylight.sh scheduler" ] && flag=false
done
# actually create the schedule
$flag && at -m $time_next <<< "$scriptdir/brightness-by-daylight.sh scheduler wait"
fi
# create the schedule
$flag && at -m $time_next <<< "$scriptdir/brightness-by-daylight.sh scheduler"
fi
# do the brightness adjustment using ddcutil
[ $sun_status == "DAY" ] && target=$high || target=$low
ddcutil setvcp 10 $target
echo "Monitor brightness set to $target%, since it's $(echo $sun_status | tr '[:upper:]' '[:lower:]') time"