#!/bin/bash

. settings

if [[ $REQUEST_METHOD != POST ]]
then
	cat <<-EOHead
		Content-type: text/plain
		Last-Modified: $(LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z')
		Expires: $(LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z')
		refresh: 0,url=/cgi/$webuser/add.html

	EOHead
	exit
fi

declare -A POST
exprdsname='^[[:upper:][:lower:]_]+$'
exprvalue='^-?[[:digit:]]+$'
while read dsname value
do
	if [[ $dsname =~ $exprdsname ]]	\
	&& [[ $value =~ $exprvalue ]]
	then
		POST["$dsname"]="$value"
	fi
done < <(
	sed 's/&/\n/g;s/=/ /g'
)
cat <<-EOHead
	Content-type: text/plain
	Last-Modified: $(LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z')
	Expires: $(LC_ALL=C TZ=GMT date +'%a, %d %b %Y %X %Z')
	refresh: 0,url=/cgi/$webuser/?start=${POST["start"]}&end=${POST["end"]}

EOHead

if [[ $webuser == $AUTH_USER || $webuser == dev ]]
then
	echo "Welcome agent $webuser"$'!\n\n'
else
	echo 'Nice try!'
	exit
fi

data=N
for dsname in "${dsnames[@]}"
do
	data+=:${POST["$dsname"]:=U}
	echo "$dsname....${POST["$dsname"]}"
done
rrdtool update ingress.rrd "$data"

if [ -n "$CACHE_DIR" ]
then
	find "$CACHE_DIR" -type f -delete
	echo $'\nCache cleared!'
fi