#!/usr/bin/env bash

# If you want munin monitoring then please copy this file to /etc/munin/plugins

if [[ "$1" = "config" ]]; then
{
  echo 'graph_title Lag to OSM main database'
  echo 'graph_vlabel seconds'
  echo "osm_db_lag.label osm_base"
  echo "osm_db_lag.warning 300"
  echo "osm_db_lag.critical 3600"
  exit 0
}; fi

DB_DATE=`cat /OVERPASS_DB_DIR/osm_base_version` # adapt directory
CUR_DATE=`date -u +%T`
DB_SECONDS=$((10#${DB_DATE:11:2}*3600 + 10#${DB_DATE:15:2}*60 + 10#${DB_DATE:19:2}))
CUR_SECONDS=$((10#${CUR_DATE:0:2}*3600 + 10#${CUR_DATE:3:2}*60 + 10#${CUR_DATE:6:2}))
LAG=$(( ( $CUR_SECONDS + 86400 - $DB_SECONDS ) % 86400 ))

echo "osm_db_lag.value $LAG"