#!/usr/bin/bash

set -eu
cd "$(dirname "$0")/.."

echo
echo "-> Applying Metadata"

IFS=$'\n'

update_metadata() {
  nummer="$(echo "$2" | jq -r '.Ausgabe')"
  thema="$(echo "$2" | jq -r '.Thema')"
  author="$(echo "$2" | jq -r '."Chefredakteur(-e)"')"
  if [ "$1" == "hertzschlag" ]; then
    titel="HertzSCHLAG $nummer"
  else
    titel="HertzBlatt $nummer"
  fi
  if [ "$author" == "null" ]; then
    author="-Author="
  else
    author="-Author=$author"
  fi
  if [ "$thema" == "null" ]; then
    thema="-Subject="
  else
    thema="-Subject=$thema"
  fi
  printf "Ausgabe $nummer: $thema\r\t\t\t\t\t\t\t"
  exiftool -overwrite_original -Producer="Malte Jürgens hsarch.hhgym.de" -Title="$titel" assets/files/$1/pdf/$nummer.pdf assets/files/$1/pdf/compressed/$nummer.pdf $thema $author
}

if [ "$#" -eq 2 ]; then
  update_metadata "$1" "$(jq -rc ".$1[] | select(.Ausgabe == \"$2\")" assets/data.json)"
else
  for ausgabe in $(jq -rc ".hertzschlag[]" assets/data.json); do
    update_metadata hertzschlag "$ausgabe"
  done
  for ausgabe in $(jq -rc ".hertzblatt[]" assets/data.json); do
    update_metadata hertzblatt "$ausgabe"
  done
fi