#!/bin/bash
# 
# Munin plugin for ejabberd.
#
# Written by Lasse Karstensen <lkarsten@hyse.org> 2007-05-27.
# Based on ejabberd-plugin by Christian Dröge <Christian@draugr.de>
#
# As connected users, registered users and server-connections have somewhat
# different scales, this plugin uses munins suggest feature to create three
# different graphs.
# 
# ejabberd_connections
# ejabberd_users
# ejabberd_registrations 	
#
# use ln -s ejabberd ejabberd_(connections|users|registrations) 
# to activate.
#
# If the autodetect-feature for vhosts breaks, you can set  
# """
# [ejabberd*]
# env.vhosts foo.com bar.com
# """
# in plugin-conf.d/munin-node to override it.
# (user root may also be smart/not so smart depending on your setup.)
#
#%# family=auto
#%# capabilities=autoconf suggest

EJCTL=$ejctl
if [ "$EJCTL" == "" ]; then
    EJCTL=`which ejabberdctl||echo "/usr/sbin/ejabberdctl"`
fi
if [ "$1" == "autoconf" ]; then
        if [ -x $EJCTL > /dev/null ]; then
                echo yes
                exit 0
        fi
        echo "no (ejabberdctl not found)"
        exit 1
fi

if [ "$1" == "suggest" ]; then
    echo "connections"
    echo "users"
    echo "registrations"
    exit 0
fi

# trying to autodetect running vhosts.
if [ -z "$vhosts" ]; then
    for CFGPATH in /etc/ejabberd /usr/local/ejabberd/etc; do
	if [ -f "$CFGPATH/ejabberd.cfg" ]; then
	    EJCFG=$CFGPATH/ejabberd.cfg;
	fi
    done
    if [ -z "$EJCFG" ]; then
        echo "Unable to find ejabberd.cfg. Exiting." > /dev/stderr
        exit -1
    fi

    # this is pretty trivial, and may break if you have many vhosts.
    vhosts=$(egrep -A5 '^\{hosts' $EJCFG | \
       egrep -v "^#" | \
    # make it one whole line.
       tr '\n' ' ' | \
    # eat what is before [ and after ] on the line.
       sed -e 's/.*\[//' -e 's/\].*//' | \
    # remove the "s
       sed -e 's/\"//g' | \
    # clean up whitespaces
       sed -e 's/ //g' | \
       sed -e 's/,/ /g' | \
    # hmm, wonder if this should be here. 
       sed -e 's/localhost//' )
    # all set!
    # okay, not so trivial. hope it works. if you get funky results, 
    # try adjusting the "egrep -Ax" above. 
fi

if [ -z "$vhosts" ]; then
    echo "No vhosts to sample." > /dev/stderr
    echo "Please set env.vhosts in plugins-conf.d/munin-node." > /dev/stderr
    exit -1
fi

MODE=`basename $0 | sed 's/^ejabberd_//g'`

if ! [ "$MODE" == "connections" -o "$MODE" == "users" \
  -o "$MODE" == "registrations" ]; then
    echo "ERROR: Unknown mode \"$MODE\". Exiting." > /dev/stderr
    exit -1
fi

if [ "$1" = "config" ]; then
    echo 'graph_args --base 1000 -l 0'
    echo 'graph_scale no'
    echo 'graph_category ejabberd'
    echo 'graph_info This graph shows a statistic of ejabberd '

    if [ "$MODE" == "connections" ]; then
        echo 's2s_connections_out.label incoming s2s connections'
        echo 's2s_connections_out.info Number of outgoing server to server connections'

        echo 's2s_connections_in.label outgoing s2s connections'
        echo 's2s_connections_in.info Number of incoming server to server connections'
    elif [ "$MODE" == "users" ]; then
	echo 'graph_title ejabberd connected users'
	echo 'graph_vlabel users'
#        echo 'connected_users.info Number of logged in users'
#        echo 'connected_users.label connected users'
	for host in $vhosts; do
	    formathost=$(echo $host | tr '.-' '_')
	    echo "connected_users_$formathost.label $host connected users";
	    echo "connected_unique_users_$formathost.label $host unique connected users";
	done;
    elif [ "$MODE" == "registrations" ]; then
	echo 'graph_title ejabberd registrations'
	echo 'graph_vlabel users'
	for host in $vhosts; do
	    formathost=$(echo $host | tr '.-' '_')
	    echo "registered_$formathost.label $host registered users"; 
	    echo "registered_$formathost.info Registered users for vhost $host"
	done;
    fi
    exit 0
fi


if [ "$MODE" == "connections" ]; then
    echo -n "s2s_connections_out.value "
    $EJCTL outgoing-s2s-number
    echo -n "s2s_connections_in.value "
    $EJCTL incoming-s2s-number
    exit 0
fi

if [ "$MODE" == "users" ]; then
#    echo -n "connected_unique_users.value "
#    $EJCTL connected-users | awk -F/ '{print $1}' | sort | uniq | wc -l

    for host in $vhosts; do
	formathost=$(echo $host | tr '.-' '_')
	echo -n "connected_users_$formathost.value "; 
	$EJCTL connected-users | grep "@$host" | wc -l
	echo -n "connected_unique_users_$formathost.value "; 
	$EJCTL connected-users | grep "@$host" | awk -F/ '{print $1}' | sort | uniq | wc -l
    done
    exit 0
fi

if [ "$MODE" == "registrations" ]; then
    for host in $vhosts; do
	formathost=$(echo $host | tr '.-' '_')
	echo -n "registered_$formathost.value "; 
	num=$($EJCTL registered-users $host)
        if [ "$?" != 0 ]; then
            echo "U"
        else
            echo $num | wc -w
        fi
    done
    exit 0
fi