#!/bin/sh

if [ $# -lt 1 ] ; then
    echo "Usage: $0 PDF-NAME"
    exit 1
fi

OLD_NAME=$1
FILE_SLUG=$(pdfinfo $OLD_NAME | grep Title | cut -d: -f 2 | sed 's/ *$//g' | sed 's/^ *//g' | tr 'A-Z' 'a-z' | tr ' ' '-')

if [ ! -z $FILE_SLUG ] ; then
    mv $OLD_NAME ${FILE_SLUG}.pdf
else
    echo Cannot detect title
fi