#!/usr/bin/env bash

# finds the active sink for pulse audio and increments the volume. useful when you have multiple audio outputs and have a key bound to vol-up and down

osd='no'
inc='2'
capvol='no'
maxvol='100'
tmpfile='/tmp/pasink.tmp'
autosync='yes'

active_sink=`pacmd list-sinks |awk '/* index:/{print $3}'`
limit=$(expr 100 - ${inc})
maxlimit=$(expr ${maxvol} - ${inc})

function volUp {

        getCurVol

        if [ ${capvol} = 'yes' ]
        then
                if [ ${curVol} -le 100 -a ${curVol} -ge ${limit} ]
                then
                        pactl set-sink-volume ${active_sink} -- 100%
                elif [ ${curVol} -lt ${limit} ]
                then
                        pactl set-sink-volume ${active_sink} -- +${inc}%
                fi
        elif [ ${curVol} -le ${maxvol} -a ${curVol} -ge ${maxlimit} ]
        then
                pactl set-sink-volume ${active_sink} ${maxvol}%
        elif [ ${curVol} -lt ${maxlimit} ]
        then
                pactl set-sink-volume ${active_sink} +${inc}%
        fi

        getCurVol

        if [ ${osd} = 'yes' ]
        then
                qdbus org.kde.kded /modules/kosd showVolume ${curVol} 0
        fi

        if [ ${autosync} = 'yes' ]
        then
                volSync
        fi
}

function volDown {

        pactl set-sink-volume ${active_sink} -${inc}%
        getCurVol

        if [ ${osd} = 'yes' ]
        then
                qdbus org.kde.kded /modules/kosd showVolume ${curVol} 0
        fi

        if [ ${autosync} = 'yes' ]
        then
                volSync
        fi

}

function getSinkInputs {

        inputs=`pacmd list-sink-inputs |grep -B 4 'sink: '${1}' ' |awk '/index:/{print $2}' >${tmpfile}`
        input_array=`cat $tmpfile`
}

function volSync {

        getSinkInputs ${active_sink}
        getCurVol

        for each in ${input_array}
        do
                pactl set-sink-input-volume ${each} ${curVol}%
        done

}

function getCurVol {

        curVol=`pacmd list-sinks |grep -A 15 'index: '${active_sink}'' |grep 'volume:' |egrep -v 'base volume:' |awk -F : '{print $3}' |grep -o -P '.{0,3}%'|sed s/.$// |tr -d ' '`

}

function volMute {

        case "$1" in
                mute)
                        pactl set-sink-mute ${active_sink} 1
                        curVol=0
                        status=1
                ;;
                unmute)
                        pactl set-sink-mute ${active_sink} 0
                        getCurVol
                        status=0
                ;;
        esac

        if [ ${osd} = 'yes' ]
        then
                qdbus org.kde.kded /modules/kosd showVolume ${curVol} ${status}
        fi

}

function volMuteStatus {

        curStatus=`pacmd list-sinks |grep -A 15 'index: '${active_sink}'' |awk '/muted/{ print $2}'`

}


case "$1" in
        --up)
                volUp
                notify-send "Volume Up " "$curVol%"
        ;;
        --down)
                volDown
                notify-send "Volume Down " "$curVol%"
        ;;
        --togmute)
		volMuteStatus
                if [ ${curStatus} = 'yes' ]
	        then
        	        volMute unmute
        	        notify-send "Volume Unmute " "$curVol%"
	        else
        	        volMute mute
        	        notify-send "Volume Mute " "$curVol%"
	        fi
        ;;
        --mute)
                volMute mute
                notify-send "Volume Mute " "$curVol%"
        ;;
        --unmute)
                volMute unmute
                notify-send "Volume Unmute " "$curVol%"
        ;;
        --sync)
                volSync
	;;
        *)
		getCurVol
		volMuteStatus
                if [ ${curStatus} = 'yes' ]
                then
			echo "    $curVol%  "
		else
			echo "    $curVol%  "
		fi
        ;;
esac