Set redshift temperature and brightness

sh

#!/bin/bash
temperatureFilePath=~/.config/redshift/TEMPERATURE
brightnessFilePath=~/.config/redshift/BRIGHTNESS
TEMPERATURE=$(cat ${temperatureFilePath})
BRIGHTNESS=$(cat ${brightnessFilePath})

MAX_TEMPERATURE=4000
MIN_BRIGHTNESS=0.5


if [ "${TEMPERATURE}" == '' ] || [ "${TEMPERATURE}" -gt 5000 ]; then
  TEMPERATURE=${MAX_TEMPERATURE}
fi

if [ "${BRIGHTNESS}" == '' ]; then
  BRIGHTNESS=1
fi


while getopts v:m: flag
do
	case "${flag}" in
		v) var=${OPTARG};;
		m) mode=${OPTARG};;
	esac
done

if [ "$var" == 't' ]; then
	if [ "$mode" == 'i' ] && [ "${TEMPERATURE}" -lt 5000 ]; then
		TEMPERATURE=$((${TEMPERATURE}+100))
	fi

	if [ "$mode" == 'd' ] && [ "${TEMPERATURE}" -gt 1000 ]; then 
		TEMPERATURE=$((${TEMPERATURE}-100))
	fi

	echo ${TEMPERATURE} > ${temperatureFilePath}
fi


if [ "$var" == 'b' ]; then
	if [ "$mode" == 'i' ] && (( `echo "${BRIGHTNESS} < 1" | bc -l` )); then
	if (( `echo "${BRIGHTNESS} < 1" | bc -l` )); then
		BRIGHTNESS=`echo "$BRIGHTNESS + 0.05" | bc -l`
	fi
	fi

	if [ "$mode" == 'd' ] && (( `echo "${BRIGHTNESS} > ${MIN_BRIGHTNESS}" | bc -l` )); then
		BRIGHTNESS=`echo "$BRIGHTNESS - 0.05" | bc -l`
	fi

	echo ${BRIGHTNESS} > ${brightnessFilePath}
fi


#notify-send "Redshift ${REDSHIFT_TEMP}k"

redshift -P -O ${TEMPERATURE} -b ${BRIGHTNESS}