#!/bin/bash

# Converts a MuseScore file to PDFs, one for each part.
# USAGE: mscz2pdfs -s <score file> -o <output directory>

score=
output_dir='.'

while getopts 's:o:' flag; do
  case "${flag}" in
    s) score=$OPTARG ;;
    o) output_dir=$OPTARG ;;
    *) error "Unexpected option ${flag}" ;;
  esac
done

if [ -z "$score" ]; then
    echo "Provide score"
fi

base_filename=${score%.mscz}
base_filename=${score##*/}
json=`mktemp "/tmp/tmp-XXXXXXX.json"`
echo "putting json in $json"

musescore --score-parts-pdf "$score" > "$json"

parts=`jq --raw-output '.parts[]' "$json"`

i=0
IFS=$'\n';
for part in $parts; do
    jq --raw-output ".partsBin[$i]" "$json" | base64 --decode > "$output_dir"/"$base_filename-$part.pdf"
    i=$((i + 1))
done
IFS=' '