Notifications for brightness and volume, using dunstify

brightnessControl.sh

#!/usr/bin/env bash

# You can call this script like this:
# $ ./brightnessControl.sh up
# $ ./brightnessControl.sh down

# Script inspired by these wonderful people:
# https://github.com/dastorm/volume-notification-dunst/blob/master/volume.sh
# https://gist.github.com/sebastiencs/5d7227f388d93374cebdf72e783fbd6a

function get_brightness {
  xbacklight -get | cut -d '.' -f 1
}

function send_notification {
  icon="preferences-system-brightness-lock"
  brightness=$(get_brightness)
  # Make the bar with the special character ─ (it's not dash -)
  # https://en.wikipedia.org/wiki/Box-drawing_character
  bar=$(seq -s "─" 0 $((brightness / 5)) | sed 's/[0-9]//g')
  # Send the notification
  dunstify -i "$icon" -r 5555 -u normal "    $bar"
}

case $1 in
  up)
    # increase the backlight by 5%
    xbacklight -inc 5
    send_notification
    ;;
  down)
    # decrease the backlight by 5%
    xbacklight -dec 5
    send_notification
    ;;
esac

volumeControl.sh

#!/usr/bin/env bash

# You can call this script like this:
# $ ./volumeControl.sh up
# $ ./volumeControl.sh down
# $ ./volumeControl.sh mute

# Script modified from these wonderful people:
# https://github.com/dastorm/volume-notification-dunst/blob/master/volume.sh
# https://gist.github.com/sebastiencs/5d7227f388d93374cebdf72e783fbd6a

function get_volume {
  amixer get Master | grep '%' | head -n 1 | cut -d '[' -f 2 | cut -d '%' -f 1
}

function is_mute {
  amixer get Master | grep '%' | grep -oE '[^ ]+$' | grep off > /dev/null
}

function send_notification {
  iconSound="audio-volume-high"
  iconMuted="audio-volume-muted"
  if is_mute ; then
    dunstify -i $iconMuted -r 2593 -u normal "mute"
  else
    volume=$(get_volume)
    # Make the bar with the special character ─ (it's not dash -)
    # https://en.wikipedia.org/wiki/Box-drawing_character
    bar=$(seq --separator="─" 0 "$((volume / 5))" | sed 's/[0-9]//g')
    # Send the notification
    dunstify -i $iconSound -r 2593 -u normal "    $bar"
  fi
}

case $1 in
  up)
    # set the volume on (if it was muted)
    amixer -D pulse set Master on > /dev/null
    # up the volume (+ 5%)
    amixer -D pulse sset Master 5%+ > /dev/null
    send_notification
    ;;
  down)
    amixer -D pulse set Master on > /dev/null
    amixer -D pulse sset Master 5%- > /dev/null
    send_notification
    ;;
  mute)
    # toggle mute
    amixer -D pulse set Master 1+ toggle > /dev/null
    send_notification
    ;;
esac