#!/usr/bin/sh

# Script:       volume
# License:      MIT
# Author:       Arkaprabha Chakraborty
# Created:      27-9-23
# Dependencies: pipewire-pulseaudio, pamixer, dunstify
#
# Copyright (C) 2023 Arkaprabha Chakraborty

# semicolon separated volume rules for multiple sinks
rules="<sink> <volume>;<sink> <volume>;<sink> <volume>"

max=80 # default max volume
step=5 # volume change step

shopt -s lastpipe # run last pipe-element in the shell process
# set max volume for default sink
echo -e $rules | tr ';' '\n' | while read rule; do
  if [ $(pactl get-default-sink) = $(echo $rule | awk '{ print $1 }') ]; then
    max=$(echo $rule | awk '{ print $2 }')
  fi
done

case $1 in # pattern match option
-i)
  pamixer -u # unmute if muted

  # set max volume if intended increase step exceeds max volume
  if [ $(pamixer --get-volume) -ge $max ]; then
    pamixer --allow-boost --set-volume $max
  elif [ $(pamixer --get-volume) -le $max ] && [ $(pamixer --get-volume) -ge $((max - step)) ]; then
    pamixer --allow-boost --set-volume $max
  else
    pamixer -i $step --allow-boost # increase volume
  fi
  volume=$(pamixer --get-volume) # get current volume

  # send notification with current volume
  dunstify -a "volume" -u low -r "9993" -h int:value:"$volume" -i "volume-$1" "Volume: ${volume}%" -t 2000
  ;;
-d)
  pamixer -u                     # unmute if muted
  pamixer -d $step --allow-boost # decrease volume

  if [ $(pamixer --get-volume) -ge $max ]; then
    pamixer --allow-boost --set-volume $max
  fi

  volume=$(pamixer --get-volume) # get current volume

  # send notification with current volume
  dunstify -a "volume" -u low -r "9993" -h int:value:"$volume" -i "volume-$1" "Volume: ${volume}%" -t 2000
  ;;
-m)
  pamixer -t                     # toggle mute
  if $(pamixer --get-mute); then # send notification with mute status
    dunstify -i volume-mute -a "volume" -t 2000 -r 9993 -u low "Muted"
  else
    dunstify -i volume-mute -a "volume" -t 2000 -r 9993 -u low "Unmuted"
  fi
  ;;
esac