Moves m4b and pdf files into the parent folder

undo-move-files.sh

#!/bin/bash

# Loop through all directories in the current directory
for directory in */; do
    # Check if it's a directory
    if [[ -d "$directory" ]]; then
        # Remove trailing slash
        dir_name="${directory%/}"

        # Construct file names
        m4b_file="${dir_name}.m4b"
        pdf_file="${dir_name}.pdf"

        # Check if the corresponding .m4b and .pdf files exist in the directory
        if [[ -f "${directory}/${m4b_file}" ]] && [[ -f "${directory}/${pdf_file}" ]]; then
            # If they do, move the .m4b and .pdf files to the current directory
            mv "${directory}/${m4b_file}" ./
            mv "${directory}/${pdf_file}" ./

            # Remove the directory
            rmdir "${directory}"

            echo "Moved ${m4b_file} and ${pdf_file} out of ${directory}"
        fi
    fi
done