i3block volume blocklet

#!/bin/bash

# return volume percentage
# and rely on volume script to adjust volume on all sinks

# normally stored in /usr/share/i3blocks

case $BLOCK_BUTTON in
    1) i3 "[instance=pavucontrol] scratchpad show; move position center" >> /dev/null ;; # show pavucontrol
    # 2) ;; # middle click
    3) volume mute ;; # mute volume
    4) volume +5% ;; # scroll up, increase
    5) volume -5% ;; # scroll down, decrease
esac

INFO=$(pactl list sinks)
MUTE_STATUS=$(echo "$INFO" | grep "Mute" | head -1 | grep "yes") # nonempty string if mute
VOLUME=$(echo "$INFO" | grep 'Volume' | head -1 | grep -oh '...%' | head -1)

if [[ -z "$MUTE_STATUS" ]]; then # if empty string --> not muted
    echo "$VOLUME"
    exit 0
fi

echo "MUTE"