Find Lego building instructions by set number from the command line and open the PDF in the default browser

lego.sh

#!/usr/bin/env bash
ARRAY=()
var=1
rows=$(curl --silent "https://www.lego.com//service/biservice/search?fromIndex=0&locale=en-US&onlyAlternatives=false&prefixText=${1}"|jq -r '.products[0].buildingInstructions[].pdfLocation')
for row in $rows;
do
  ARRAY+=(${row})
  echo "$((var++)). ${row}"
done
echo -ne "Welche Anleitung soll ich öffnen? "
read n
URL="${ARRAY[n-1]}"
[[ -x $BROWSER ]] && exec "$BROWSER" "$URL"
path=$(which xdg-open || which gnome-open || which open) && exec "$path" "$URL"

Usage : ./lego.sh SETNUMBER
Example :
./lego.sh 70321