#!/bin/bash
set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR

if [[ $EUID != 1000 ]]; then
  echo "$0: error run as normal user" >&2
  exit 1
fi

shopt -s nullglob


# We run this cronjob along with sending the test email every 5 minutes,
# so give it 1 minute to arrive, then if the latest email is older than
# 7 minutes, the last 2 haven't arrived in a reasonable amount of time.
min_limit=7

if [[ ! $1 && $- != *i* ]]; then
  sleep 60
fi


folders=(/m/md/l/testignore{,2}/new)
find ${folders[@]} -type f -mtime +1 -delete

for folder in ${folders[@]}; do
  cd $folder
  last_sec=0
  for file in *; do
    if [[ $file -nt $latest ]]; then
      latest=$file
    fi
  done

  if [[ $latest ]]; then
    last_sec=$(awk '/^Subject: / {print $3}' $latest)
  fi

  now=$(date +%s)
  limit=$(( now - 60 * min_limit ))

  if (( last_sec <= limit )); then
    echo $HOSTNAME mailtest failure
    touch /nocow/user/mailtest-failure
    break
  else
    rm -f /nocow/user/mailtest-failure
  fi
done