first Version

backup/eww/scripts/volume.sh

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+#!/bin/bash
+
+min_volume="0"
+max_volume="100"
+
+# Check if an argument is provided
+if [[ -z $1 ]]; then
+  echo "Error: Number argument is missing."
+  exit 1
+fi
+
+# Retrieve the argument value
+number_to_add=$1
+
+# Validate if the argument is a number
+if ! [[ $number_to_add =~ ^-?[0-9]+$ ]]; then
+  echo "Error: Invalid number argument."
+  exit 1
+fi
+
+# Read the current brightness value from the file
+current_volume=$(wpctl get-volume @DEFAULT_AUDIO_SINK@ | awk '{print $2 * 100}')
+
+# Add the desired number to the current brightness
+new_volume=$((current_volume + number_to_add))
+
+# Enforce minimum and maximum brightness values
+if (( new_volume < min_volume )); then
+  new_volume=$min_volume
+elif (( new_volume > max_volume )); then
+  new_volume=$max_volume
+fi
+
+wpctl set-volume @DEFAULT_AUDIO_SINK@ "${new_volume}%"
+
+eww update volumeValue="$new_volume"