Vvolume

#!/bin/zsh

. Vglobals

function curr_volume()
{
	pactl list sinks | sed -n "/$1\$/,/Volume:/s/^.*Volume: .* \([1-9][0-9]*\)%.*$/\1/p";
}

if [ "$#" -ne "1" ]; then 
	echo "argument must be +, -, % or number (0 mutes and unmutes)";
	exit 1;
fi

default_sink="$(pactl info | sed -n 's/^Default Sink: \(.*$\)/\1/p')";

if [ "$1" = "0" ]; then
	pactl set-sink-mute $default_sink toggle;
elif [ "$1" = "+" ] && [ $(($(curr_volume $default_sink) + VOLUME_DERIVATIVE_SLOPE)) -le $VOLUME_MAX ]; then
	pactl set-sink-volume $default_sink +$VOLUME_DERIVATIVE_SLOPE%;
elif [ "$1" = "-" ]; then
	pactl set-sink-volume $default_sink -$VOLUME_DERIVATIVE_SLOPE%;
elif [ "$1" = "%" ]; then
	echo "\tDdefault sink: $default_sink";
	pactl list sinks | sed -n "/$default_sink\$/,/Mute/p" | tail -n1;
	current_percent=$(curr_volume $default_sink);
	current_percent=$((current_percent * 100 / VOLUME_MAX));
	echo "\tVolume: $current_percent%";
elif [[ "$1" =~ "^[0-9]+$" ]] && [ $1 -ge 0 ] && [ $1 -le $VOLUME_MAX ]; then
	pactl set-sink-volume $default_sink $1%;
else 
	echo "argument must be +, -, % or number (0 mutes and unmutes)";
	echo "or required volume > VOLUME_MAX, which can be set in Vglobals file";
	exit 3;
fi

exit 0;