#!/bin/bash
#
# Plugin to monitor BigBrotherBot errors
#
#    ln -s /usr/share/node/node/plugins-auto/b3error_
#    /etc/munin/node.d/b3error_name
#
#    you must provide the path to bigbrotherbot logfile with env.logfile
# Parameters understood:
#
# 	config   (required)
# 	autoconf (optional)
#
# Magic markers (optional - used by munin-config and installation
# scripts):
#
#%# capabilities=autoconf

B3NAME=${0##*/b3error_}
LOGTAIL=${logtail:-`which logtail`}
#logfile from env
STATEFILE=/var/lib/munin/plugin-state/${B3NAME}.offset

mktempfile () {
  mktemp -t $1
}  


if [ "$1" = "autoconf" ]; then
    if [ -n "${B3NAME}" -a -f "${logfile}" -a -n "${LOGTAIL}" -a -x "${LOGTAIL}" ]; then
        echo yes
        exit 0
    else
        echo -n "no"
        if [ ! -n "${B3NAME}" ]; then
          echo " (you must call that plugin with a symlink)"
        elif [ ! -n "${logfile}" ]; then
          echo " (you must set the env variable env.logfile)"
        elif [ ! -f "${logfile}" ]; then
          echo " (log file : '${logfile}' not found)"
        elif [ ! -n "${LOGTAIL}" ]; then
          echo " (logtail required)"
        elif [ ! -x "${LOGTAIL}" ]; then
          echo " (cannot execute ${LOGTAIL})"
        fi
        exit 1
    fi
fi

if [ "$1" = "config" ]; then
    echo "graph_title BigBrotherBot errors - ${B3NAME}"
    cat <<'EOM' 
graph_args --base 1000 -l 0
graph_vlabel Errors
graph_category Games
errors.label total errors
errors.draw AREA
rconreading.label RCON: ERROR reading
rconreading.draw AREA
eventqueue.label Event sat in queue too long
eventqueue.draw AREA
parseline.label could not parse line
parseline.draw AREA
other.label Other errors
other.draw AREA
EOM
    exit 0
fi

errors=U
rconsocketerror=U
parseline=U
eventqueue=U
other=U

TEMP_FILE=`mktempfile munin-${B3NAME}-log.XXXXXX`
if [ -n "$TEMP_FILE" -a -f "$TEMP_FILE" ]
then
    $LOGTAIL ${logfile} $STATEFILE > ${TEMP_FILE}
    errors=`sed -rne 's/^[0-9]+\s+[0-9:]+\s+ERROR\s+(.+)/\1/p' ${TEMP_FILE} | wc -l`
    rconreading=`grep 'RCON: ERROR reading' ${TEMP_FILE} | wc -l`
    parseline=`grep 'could not parse line' ${TEMP_FILE} | wc -l`
    eventqueue=`grep '**** Event sat in queue too long:' ${TEMP_FILE} | wc -l`
    other=$(( $errors - ($rconreading + $parseline + $eventqueue) ))
    /bin/rm -f $TEMP_FILE
fi


echo "errors.value ${errors}"
echo "rconreading.value ${rconreading}"
echo "eventqueue.value ${eventqueue}"
echo "parseline.value ${parseline}"
echo "other.value ${other}"

exit 0