#!/bin/sh
tmp=$(mktemp -d memberaliases.XXXXXXXXXX)
cd "$tmp" || exit 1

nsca_client_name='mx1.infra.opensuse.org'
nsca_client_service='openSUSE virtual_users'
nsca_server_ip='192.168.47.7'
nsca_config='/etc/send_nsca.cfg'
#status_code=3
#status_message='unknown'

send_nsca_message(){
	local status_code="$1"
	local status_message="$2"
	echo -e "$nsca_client_name\t$nsca_client_service\t$status_code\t$status_message" | send_nsca -H $nsca_server_ip -c "$nsca_config"
}

wget -q --timeout=15 --tries=3 -O member.aliases.new \
	'https://connect.opensuse.org/services/api/rest/txt/?method=connect.membersadmin.maildump&api_key=e28d9177fdc1268bc003f2ba6cdbb221ef8f24d8'

# need to make sure it is ordered
LC_ALL=C sort -d -k1 member.aliases.new >member.aliases.ordered

added=$(diff -B /etc/postfix/virtual-opensuse-users member.aliases.ordered | grep ^\> | wc -l)
removed=$(diff -B /etc/postfix/virtual-opensuse-users member.aliases.ordered | grep ^\< | wc -l)
total=$(wc -l <member.aliases.ordered)

# if too many would be removed, something's probably wrong.
if test $removed -gt 20
then
        printf "New member-aliases list (%u entries) would remove %u aliases ?\n" $total $removed
	send_nsca_message "1" "New member-aliases list ($total entries)  would remove $removed aliases | total=$total; added=$added; removed=$removed;"
	# tidy up
	rm -Rf "$tmp"
        exit 1
fi

# if we had any changes, update our alias list
if test $added -gt 0 -o $removed -gt 0
then
        printf "virtual-opensuse-users updated: %u additions, %u removals, now %u entries\n" $added $removed $total
        send_nsca_message "0" "virtual-opensuse-users updated: $added additions, $removed removals, now $total entries | total=$total; added=$added; removed=$removed;"
	# debug
	diff -B /etc/postfix/virtual-opensuse-users member.aliases.ordered

	mv member.aliases.ordered /etc/postfix/virtual-opensuse-users
        postmap /etc/postfix/virtual-opensuse-users
        postfix reload
else
#        printf "virtual-opensuse-users not updated, no changes found.\n"
        send_nsca_message "0" "virtual-opensuse-users not updated, no changes found | total=$total; added=$added; removed=$removed;" >/dev/null
fi

# tidy up
rm -Rf "$tmp"