#!/bin/bash -e

vectorize() {
    input="$(realpath "$1")"
    output="$(realpath "$2")"

    mkdir -p _vectorize
    cd _vectorize

    echo "1. pdf to pages"
    pdfseparate "$input" '%d.pdf'

    echo "2. pages to svg (text -> outline)"
    for i in *.pdf; do
        pdf2svg "$i" "$i".svg
    done;

    echo "3. svg to pages"
    (for i in *.svg; do
         echo "$i" --export-pdf "$i.pdf"
     done;) | inkscape --shell

    echo "4. pages to pdf"
    pdfunite $(ls *.svg.pdf | sort -n) "$output"

    rm *.pdf *.svg;
    cd ..
    rmdir _vectorize
}

for input in "$@"; do
    input="$(realpath "$input")"
    vectorized="${input%*.pdf}_vectorize.pdf"
    output="${input%*.pdf}.pptx"
    vectorize "$input" "$vectorized"
    libreoffice --infilter="impress_pdf_import" "$vectorized"
done;