#!/bin/sh

set -e

: << =cut

=head1 NAME

loolwsd - Monitor usage (open documents and active views) and memory
usage of libreoffice online

=head1 APPLICABLE SYSTEMS

LibreOffice Online or Collabora Online or Collabora Online Development 
Edition

=head1 CONFIGURATION

Requires installed curl.

Set username, password of admin user and if required an url in your 
munin-node configuration. Default url is 
http://127.0.0.1:9980/lool/getMetrics

 [loolwsd]
 env.username <lool_admin>
 env.password <lool_password>
 env.url <lool_getmetrics_url>

You can set an administative user for loolwsd by invoking

loolconfig set-admin-password

=head1 AUTHOR

Copyright (C) 2020 Sebastian L. (https://momou.ch)

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=manual
 #%# capabilities=autoconf

=cut

. "$MUNIN_LIBDIR/plugins/plugin.sh"

STATS_URL=${url:-"http://127.0.0.1:9980/lool/getMetrics"}
USERNAME="${username:-}"
PASSWORD="${password:-}"

case $1 in
    autoconf)
        if [ -x /usr/bin/loolwsd ]; then
		if [ -x /usr/bin/curl ]; then
			curl -s -f -m 2 -I -u "$USERNAME:$PASSWORD" "$STATS_URL" | grep -iq "Content-Type: text/plain" && echo "yes" && exit 0 || echo "no (invalid or empty response from loolwsd ($STATS_URL)" && exit 0
		else
			echo "no (/usr/bin/curl not found)" && exit 0
		fi
        else
		echo "no (/usr/bin/loolwsd not found)"
		exit 0
        fi
        ;;

   config)
	echo "multigraph loolwsd_usage"
	echo "graph_title Libreoffice Online Usage"
	echo "graph_category appserver"
	echo "graph_vlabel open documents / active views"
	echo "graph_info This graph shows currently open documents and active views."
	echo "graph_args --base 1000 --lower-limit 0"
	echo "documents.label open documents"
	echo "documents.info Current number of open documents"
	echo "documents.min 0"
	echo "active_views.label active views"
	echo "active_views.info Current number of active views"
	echo "active_views.min 0"
	echo "multigraph loolwsd_memory"
	echo "graph_title Libreoffice Online Memory Usage"
	echo "graph_category appserver"
	echo "graph_vlabel memory usage of libreoffice online"
	echo "graph_info This graph shows currently used memory of libreoffice online."
	echo "graph_args --base 1000 --lower-limit 0"
	echo "memory.label used memory"
	echo "memory.info Currently used memory of libreoffice online"
	echo "memory.min 0"
	exit 0
        ;;

esac

STATS=$(curl -s -f -u "$USERNAME:$PASSWORD" "$STATS_URL")
echo "multigraph loolwsd_usage"
echo "documents.value $(echo "$STATS" | grep kit_assigned_count | cut -d " " -f 2)"
echo "active_views.value $(echo "$STATS" | grep document_active_views_active_count_total | cut -d " " -f 2)"
echo "multigraph loolwsd_memory"
echo "memory.value $(echo "$STATS" | grep global_memory_used_bytes | cut -d " " -f 2)"