#!/bin/sh

set -e

: << =cut

=head1 NAME

jitsi_videobridge - Monitor sessions and conferences on a jitsi-videobridge

=head1 APPLICABLE SYSTEMS

Jitsi-Videobridge instances

=head1 CONFIGURATION

Requires enabled colibri statistics on jitsi-videobridge and an 
installed jq, a command-line json processor.

You may specify the URL where to get the statistics.

 url      - URL of colibri stats
 max_time - Timeout curl - defaults to 3 seconds

 [jitsi_videobridge]
 env.url http://127.0.0.1:8080/colibri/stats
 env.max_time 3

... and you may disable the audiochannel when you don't use an
audio gateway.

=head1 AUTHOR

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

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

. "$MUNIN_LIBDIR/plugins/plugin.sh"

COLIBRI_URL=${url:-"http://127.0.0.1:8080/colibri/stats"}
max_time=${max_time:-3}

case $1 in

    autoconf)
        if [ -x /usr/bin/curl ]; then
            if [ -x /usr/bin/jq ]; then
	        curl -s -f -m "${max_time:-3}" -I "$COLIBRI_URL" | grep -iq "Content-Type: application/json" && echo "yes" && exit 0 || echo "no (invalid or empty response from colibri API ($COLIBRI_URL))" && exit 0
            else
                echo "no (jq not found)" && exit 0
            fi
        else
            echo "no (/usr/bin/curl not found)" && exit 0
        fi
        ;;

   config)
        echo "multigraph jitsi_videobridge_sessions"
        echo "graph_title Current jitsi-videobridge sessions"
        echo "graph_info Current jitsi-videobridge sessions"
        echo "graph_vlabel current sessions"
        echo "graph_args --base 1000 -l 0"
        echo "jitsi_videochannels.label videochannels"
        echo "jitsi_videochannels.info current number of videochannels"
        echo "jitsi_videochannels.min 0"
        echo "jitsi_videochannels.draw AREASTACK"
        echo "jitsi_audiochannels.label audiochannels"
        echo "jitsi_audiochannels.info current number of audiochannels"
        echo "jitsi_audiochannels.min 0"
        echo "jitsi_audiochannels.draw AREASTACK"
        echo "jitsi_conferences.label conferences"
        echo "jitsi_conferences.info current number of conferences"
        echo "jitsi_conferences.min 0"
        echo "jitsi_conferences.draw LINE2"
        echo "jitsi_participants.label participants"
        echo "jitsi_participants.info current number of participants"
        echo "jitsi_participants.min 0"
        echo "jitsi_participants.draw LINE2"
        echo "multigraph jitsi_videobridge_conferences"
        echo "graph_title Total of jitsi-videobridge conferences"
        echo "graph_info Total of jitsi-videobridge conferences"
        echo "graph_vlabel conferences"
        echo "graph_args --base 1000 -l 0"
        echo "jitsi_total_conferences_created.label created conferences"
        echo "jitsi_total_conferences_created.info total of created conferences"
        echo "jitsi_total_conferences_created.min 0"
        echo "jitsi_total_conferences_created.draw AREA"
        echo "jitsi_total_conferences_completed.label completed conferences"
        echo "jitsi_total_conferences_completed.info total of completed conferences"
        echo "jitsi_total_conferences_completed.min 0"
        echo "jitsi_total_conferences_completed.draw AREASTACK"
        echo "jitsi_total_partially_failed_conferences.label partially failed conferences"
        echo "jitsi_total_partially_failed_conferences.info total of partially failed conferences"
        echo "jitsi_total_partially_failed_conferences.min 0"
        echo "jitsi_total_partially_failed_conferences.draw AREASTACK"
        echo "jitsi_total_failed_conferences.label failed conferences"
        echo "jitsi_total_failed_conferences.info total of failed conferences"
        echo "jitsi_total_failed_conferences.min 0"
        echo "jitsi_total_failed_conferences.draw AREASTACK"

	exit 0
        ;;

esac

JSONSTATS=$(curl -s -f -m "$max_time" "$COLIBRI_URL")

echo "multigraph jitsi_videobridge_sessions"
for KEY in videochannels audiochannels conferences participants; do
    VALUE=$(echo "$JSONSTATS" | jq -r ".$KEY // \"U\"")
    echo "jitsi_${KEY}.value $VALUE"
done

echo "multigraph jitsi_videobridge_conferences"
for KEY in total_conferences_created total_failed_conferences total_partially_failed_conferences total_conferences_completed; do
    VALUE=$(echo "$JSONSTATS" | jq -r ".$KEY // \"U\"")
    echo "jitsi_${KEY}.value $VALUE"
done