#!/bin/bash

# define functions to assist with operations
pash_increase() {
	echo "increasing volume on all active sinks..."
	local sinks=$(pactl list short sinks | grep "RUNNING\|IDLE" | awk '{print $1}')
	echo "$sinks" | while IFS= read -r sink ; do pactl set-sink-volume $sink +5%; done
}

pash_decrease() {
	echo "decreasing volume on all active sinks..."
	local sinks=$(pactl list short sinks | grep "RUNNING\|IDLE" | awk '{print $1}')
	echo "$sinks" | while IFS= read -r sink ; do pactl set-sink-volume $sink -5%; done
}

pash_mute() {
	echo "toggling mute on all active sinks..."
	local sinks=$(pactl list short sinks | grep "RUNNING\|IDLE" | awk '{print $1}')
	echo "$sinks" | while IFS= read -r sink ; do pactl set-sink-mute $sink toggle; done
}

# select operation from list
case $1 in
	increase)
		pash_increase
		;;
	decrease)
		pash_decrease
		;;
	mute)
		pash_mute
		;;
	*)
		echo "unknown command ${1}..."
		;;
esac