#!/bin/bash
# source files
SOURCE="$HOME/bin/assinatura_automatica";

# collect current date, command expansion for date
data=$(LC_TIME=pt_BR.utf8 date "+%A, %d de %B de %Y (%T)");

# add date into signature file, svg files are in fact xml
sed "s/DATE/$data/" 
"${SOURCE}/source assinatura.svg" 
> "${SOURCE}/assinatura s.svg";

sed "s/DEPT/${1}/" 
"${SOURCE}/assinatura s.svg" 
> "${SOURCE}/assinatura.svg";

# create pdf signature file, using imagemagick library
convert -density 300 
-transparent white 
"${SOURCE}/assinatura.svg" 
"${SOURCE}/assinatura.pdf";

# move the input forward
shift;

# add signature into file, pdftk library
for file in "${@}"; do
    pdftk "${file}" stamp "${SOURCE}/assinatura.pdf" output "${file%pdf}assn.pdf";
done;

exit 0;