#!/usr/bin/sh

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

# icon paths
VOLUME_MUTED=/usr/share/icons/Papirus/48x48/status/notification-audio-volume-muted.svg
VOLUME_UNMUTED=/usr/share/icons/Papirus/48x48/status/notification-audio-volume-high.svg
AUDIO_SPEAKER=/usr/share/icons/Papirus/48x48/devices/audio-speakers.svg

# semicolon separated volume rule for multiple sinks
RULE="<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 $RULE | 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" "Volume: ${volume}%" -t 2000 -i $AUDIO_SPEAKER
  ;;
-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" "Volume: ${volume}%" -t 2000 -i $AUDIO_SPEAKER
  ;;
-m)
  pamixer -t                     # toggle mute
  if $(pamixer --get-mute); then # send notification with mute status
    dunstify -a "volume" -t 2000 -r 9993 -u low "Muted" -i $VOLUME_MUTED
  else
    dunstify -a "volume" -t 2000 -r 9993 -u low "Unmuted" -i $VOLUME_UNMUTED
  fi
  ;;
esac