#!/bin/bash
# Copyright (C) 2019 Ian Kelling
# SPDX-License-Identifier: AGPL-3.0-or-later

# usage: runs 4 times every 15 seconds unless any args are passed, then just runs once

if [ -z "$BASH_VERSION" ]; then echo "error: shell is not bash" >&2; exit 1; fi

source /a/bin/errhandle/err
status_file=/dev/shm/iank-status

shopt -s nullglob
shopt -s dotglob

lo() { /usr/local/bin/log-once "$@"; }

write-status() {
  chars=()

  glob=(/nocow/btrfs-stale/*)
  if [[ -e ${glob[0]} ]]; then
    chars+=("STALE!")
  fi
  glob=(/m/md/bounces/new/*)
  if [[ -e ${glob[0]} ]]; then
    chars+=("BOUNCE!")
    lo -1 bounce "message in /m/md/bounces/new"
  fi
  glob=(/m/md/alerts/new/* /m/md/alerts/cur/*)
  if [[ -e ${glob[0]} ]]; then
    chars+=("ALERT!")
  fi
  if [[ -e /nocow/user/mailtest-failure ]]; then
    chars+=("MAILPING!")
  fi
  if [[ -s /var/log/exim4/paniclog ]]; then
    chars+=("PANIC!")
    tail /var/log/exim4/paniclog | lo -1 paniclog
  fi

  source /a/bin/bash_unpublished/source-state
  if [[ $MAIL_HOST == "$HOSTNAME" ]]; then
    if [[ $(systemctl is-active btrbk.timer) != active ]]; then
      chars+=("BTRBK.TIMER!")
      lo -60 btrbk.timer "btrbk.timer not enabled"
    fi

    ## check if last snapshot was within an hour
    vol=o
    snaps=(/mnt/root/btrbk/$vol.20*)
    now=$(date +%s)
    maxtime=0
    for s in ${snaps[@]}; do
      file=${s##*/}
      t=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${file#$vol.}) +%s)
      if (( t > maxtime )); then
        maxtime=$t
      fi
    done
    if (( maxtime < now - 60*60 )); then
      chars+=("OLD-SNAPSHOT!")
      lo -1 old-snapshot "/o snapshot older than 1 hour"
    fi
  fi

  cat /a/bin/bash_unpublished/source-state >$status_file

  if [[ ${chars[*]} ]]; then
    echo "ps_char=\"${chars[*]} \$ps_char\"" >>$status_file
  fi

}
write-status
if [[ $1 ]]; then
  cat $status_file
  exit 0
fi
for ((i=1; i<=3; i++)); do
  sleep 15
  write-status
done