#!/bin/bash

## Copyright (C) 2022 Antonia <antonia@antonia.is>

## fills in personal data on forms generated by travelynx


tmpfile=$(mktemp --tmpdir XXXXX.fdf)

cat - <<EOF >>$tmpfile
%FDF-1.2
1 0 obj<</FDF<< /Fields[
EOF

function write_field() {
	echo "<< /T ($1) /V ($2) >>" >> $tmpfile
}


source ~/.fgfillerrc

if [ -n "$IBAN" ]; then
	write_field S1F29 "Auszahlung oder Überweisung"
	if [ -z "$ACCHOLDER" ]; then
		ACCHOLDER="$FIRSTNAME $LASTNAME"
	fi
	write_field S2F20 "$ACCHOLDER"
	write_field S2F21 "$IBAN"
	write_field S2F22 "$BIC"
else
	write_field S1F29 "Gutschein"
fi	

write_field S2F1 "$GENDER"
[ -n "$TITLE" ] && write_field S2F2 "$TITLE"
[ -n "$COMPANY" ] && write_field S2F3 "$COMPANY"
write_field S2F4 "$LASTNAME"
write_field S2F5 "$FIRSTNAME"
[ -n "$CO" ] && write_field S2F6 "$CO"
[ -n "$PHONENR" ] && write_field S2F7 "$PHONENR"
write_field S2F8 "$STREET"
write_field S2F9 "$HOUSENR"
[ -n "$COUNTRY" ] && write_field S2F10 "$COUNTRY"
write_field S2F11 "$ZIP"
write_field S2F12 "$CITY"

if [ -n "$CARDNR" ]; then
	write_field S2F15 "$CARDNR"
	if [ -n "$DOB" ]; then
		write_field S2F13 "BahnCard 100-Nr."
		k=0
		for i in $DOB ; do
			write_field S2F$((k+16)) $i
			k=$((k+1))
		done
	else
		write_field S2F14 "Zeitkarten-Nr."
	fi
fi


   



cat - <<EOF>>$tmpfile
] >> >>
endobj
trailer
<</Root 1 0 R>>
%%EOF
EOF


mkdir -p output

for k in "$@"; do
	outfile="output/$(basename "$k")"
	tmp=$(mktemp --tmpdir XXXXX.pdf)
	sed "s/Auszahlung#20oder#20#dcberweisung/Auszahlung#20oder#20#c3Sberweisung/g" "$k" > "$tmp" # solve pdftk bug		
	pdftk "$tmp" fill_form $tmpfile output "$outfile"
	rm $tmp
done

rm $tmpfile