#!/bin/sh

MYURL=https://www.langtag.net/
LTR_URL=https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
LTR_LOCAL=language-subtag-registry
PROGRAMS_DIR=../../GaBuZoMeu
TEST_PROGRAM=${PROGRAMS_DIR}/check-registry
OS="$(uname)"
if [ "$OS" = "FreeBSD" ]; then 
  # FreeBSD's mktemp is stupid enough to have *no*
  # default template :-(
  OUTPUT=`mktemp /tmp/$(basename $0).tmp.XXX)`
  TMPDIFF=`mktemp /tmp/$(basename $0).tmp.XXX)`
else
  OUTPUT=`mktemp`
  TMPDIFF=`mktemp`
fi
MAINTAINER=stephane+langtag@bortzmeyer.org

# Conversions
CONVERT_XML_BORTZMEYER=${PROGRAMS_DIR}/registry2xml
CONVERT_XML_ELLERMANN="awk -f ltru2xml.awk "
CONVERT_POSTGRESQL=${PROGRAMS_DIR}/registry2postgresql
CONVERT_SQLITE=${PROGRAMS_DIR}/registry2sqlite
CONVERT_TXT=${PROGRAMS_DIR}/registry2txt
CONVERT_HTML=${PROGRAMS_DIR}/registry2mulhtml
FILL_DATABASE=./fill-in-database.sh
# --force is to avoid spurious warnings about "Ambiguous output"
#CRLF_TO_LOCAL="recode --force /CR-LF..US-ASCII "

trap  "rm -f $OUTPUT $TMPDIFF; exit 1" 1 2 3 15
trap  "rm -f $OUTPUT $TMPDIFF" EXIT

if [ -e ${LTR_LOCAL} ]; then
  ltr_date=`head -n 1 ${LTR_LOCAL} | cut -d" " -f2`
  # Allow time to elapse. The date of the file at IANA is often the day after
  # the date written in the LSR. Heuristically, we add one day and a few hours.
  current_date=`date +"%Y%m%d %H:%M:%S" --date="${ltr_date} +1 day +4 hour"`
else
  # Trick to force a downloading
  current_date="19700101"
  #current_date=`date --utc +"%Y%m%d"`
fi
curl --silent --output ${LTR_LOCAL}.TMP \
    --compressed \
    --referer ${MYURL} \
    --proxy "" \
    --time-cond "${current_date}" \
    --header "From: ${MAINTAINER}" \
  ${LTR_URL} 2>&1 > ${OUTPUT}
if [ $? != 0 ]; then
    cat ${OUTPUT} | mutt -s "Network error getting ${LTR_URL}" ${MAINTAINER}
    exit 1
fi
if [ -e ${LTR_LOCAL}.TMP ]; then
    #$CRLF_TO_LOCAL ${LTR_LOCAL}.TMP
    ${TEST_PROGRAM} ${LTR_LOCAL}.TMP 2>&1 >> ${OUTPUT}
    if [ $? = 0 ]; then
	if [ -e ${LTR_LOCAL} ]; then
	    diff -u ${LTR_LOCAL} ${LTR_LOCAL}.TMP > $TMPDIFF
            if [ ! -z $TMPDIFF ]; then
		mutt -s "New LTR registry at ${MYURL}" ${MAINTAINER} < $TMPDIFF
            fi
	fi
	mv ${LTR_LOCAL}.TMP ${LTR_LOCAL}
        # Now, the various conversions
	${CONVERT_XML_BORTZMEYER}
	# trang is in Java and therefore fails frequently
	# trang -Irnc -Orng ltru.rnc ltru.rng
	xmllint --noout --relaxng ltru.rng ${LTR_LOCAL}.xml
        ${CONVERT_TXT}
        #${CONVERT_XML_ELLERMANN} < ${LTR_LOCAL} > ${LTR_LOCAL}2.xml
	#xmllint --noout --valid ${LTR_LOCAL}2.xml
        ${CONVERT_POSTGRESQL} > lsr-postgres.sql
        ${CONVERT_SQLITE} > lsr-sqlite.sql
	# TODO: UTF-8 support on SQLite was never tested
	./utf82ncr.py lsr-sqlite.sql
	mv lsr-sqlite.sql lsr-sqlite-utf8.sql
	mv lsr-sqlite-ncr.sql lsr-sqlite.sql
        ${CONVERT_HTML}
        ${FILL_DATABASE}
	./lsr2atom.py > lsr.atom
        version=`head -n 1 ${LTR_LOCAL} | awk '{print $2}'`
        echo $version > ${LTR_LOCAL}-version
        exit 0
    else
	cat ${OUTPUT} | mutt -s "Invalid registry ${LTR_URL}" ${MAINTAINER}
	exit 1
    fi
else # File not downloaded, probably because there was nothing new.
    exit 0
fi