#!/bin/bash

#    IngRRD (https://forge.riquer.fr/p/ingrrd/)
#    Copyright (C) 2014-2015  Vincent Riquer
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

read_query_string() {
	local			\
		exprgraph	\
		exprtime	\
		name		\
		query_data	\
		value		\

	if [ -n "$QUERY_STRING" ]
	then
		query_data="${QUERY_STRING//&/
	}"
		exprtime='[[:alnum:]-]+'
		exprgraph='[[:alpha:]_]+'
		exprprev='[[:digit:]]+[(d(ay)?)(w(eek)?)(month)(y(ear)?)]'
		while read name value
		do
			case $name in
				start)
					[[ $value =~ $exprtime ]] && start=$value
				;;
				end)
					[[ $value =~ $exprtime ]] && end=$value
				;;
				hist|trend)
					show_graphs=1
				;;
				graph)
					[[ $value =~ $exprgraph ]] && graph=$value
				;;
				show)
					[[ $value == all ]] && show_all=1
				;;
				prevperiod)
					[[ $value =~ $exprprev ]] && prevperiod=$value
				;;
			esac
		done <<<"${query_data//=/ }"
	fi
}