#!/bin/bash

# eccc_fixer.sh - Create Environment and Climate change Canada historical data
#                 files download list
# Copyright (C) 2019-2020  Pierre Choffet
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -ex

SOURCE="${1}"
DESTINATION="${2}"

if [ -z "${SOURCE}" ]||[ -z "${DESTINATION}" ]||[ -d "${DESTINATION}" ]
then
	echo 'Fix XMLs provided by Environment and Climate change Canada'
	echo 'Usage: eccc_fixer.sh <source folder> <destination folder>'
	echo ''
	echo 'To prevent wrong usage, <destination folder> must not exist.'
	exit 1
fi

# Recreate folders structure
while IFS= read -r -d '' -u 9
do
	mkdir -p -- "${DESTINATION}/$(realpath --relative-to "${SOURCE}" "${REPLY}")"

done 9< <( find "${SOURCE}" -type d -print0 )

# Transform original files
while IFS= read -r -d '' -u 9
do
	xmlstarlet tr eccc_fixer.xslt "${REPLY}" > "${DESTINATION}/$(realpath --relative-to "${SOURCE}" "${REPLY}")"
done 9< <( find "${SOURCE}" -type f -name '*.xml' -print0 )