#!/bin/bash
# this script only makes sense if there is a good people counter installed
if [ "$1" = "closed" ] && [ "$2" = "open" ]
then
  p="$(tail -1 /run/peoplecounter)"
  pp="$(tac /run/peoplecounter | awk -v p="$p" 'p!=$1 {print;exit}')"   # get previous count. this may fail if people exit and after long time close door
  if [ "$pp" = "" ]
  then
    pp=0   # if no variation found, don not do anything
  fi
  if [ "$p" != "0" ] &&  # there are people present
     [ "$p" -ge "$pp" ]  # nobody left i.e. current count is greater or equal to previous count
  then
    logger $(basename $0) There are $p people, previusly $pp, closed door from inside. Waiting 1 min. 
    sleep 60
    np="$(tail -1 /run/peoplecounter)"
    if [ "$np" -lt "$p" ]   # new count is lower than previous
    then
      logger $(basename $0) There are now $np people, after 1 min wait. All OK.
    else
      logger $(basename $0) There are $np people, after 1 min. Maybe ALARM
      python -c 'import smtplib ; import sys ; server = smtplib.SMTP("mail.syn2cat.lu", 25) ; msg = "Subject: ALARM level2 intruder\n\ndoor closed with "+sys.argv[1]+" people inside" ; server.sendmail("gkess@pt.lu", "gunstick@syn2cat.lu", msg) ; server.quit()' "$np"

    fi
  else
    logger $(basename $0) There are $p people, correctly closed door from outside. All OK.
  fi &
fi