increase/decreate Gnome's night light temperature from the command line

tempcontrol

#!/bin/bash

TEMP_MIN=1000
TEMP_MAX=10000

RAW_TEMPERATURE=$(gsettings get org.gnome.settings-daemon.plugins.color night-light-temperature)
COLOR_TEMP=${RAW_TEMPERATURE//uint32/}

GRANULARITY=500

if [ $# -eq 0 ]
    then echo "NO ARGUMENT!"
else
    if [ $1 == "increase" ]
        then COLOR_TEMP=$(expr $COLOR_TEMP - $GRANULARITY)
    elif [ $1 == "decrease" ]
        then COLOR_TEMP=$(expr $COLOR_TEMP + $GRANULARITY)
    fi
fi

# TODO: automatically disable night light when turned to a normal temp

if [ $COLOR_TEMP -lt $TEMP_MIN ]
    then COLOR_TEMP=$TEMP_MIN
elif [ $COLOR_TEMP -gt $TEMP_MAX ]
    then COLOR_TEMP=$TEMP_MAX
fi

gsettings set org.gnome.settings-daemon.plugins.color night-light-temperature $COLOR_TEMP