#!/bin/bash

function _setup_logs_general
{
  _log 'debug' 'Setting up general log files'

  # File/folder permissions are fine when using docker volumes, but may be wrong
  # when file system folders are mounted into the container.
  # Set the expected values and create missing folders/files just in case.
  mkdir -p /var/log/{mail,supervisor}
  chown syslog:root /var/log/mail
}

function _setup_logrotate
{
  _log 'debug' 'Setting up logrotate'

  LOGROTATE='/var/log/mail/mail.log\n{\n  compress\n  copytruncate\n  delaycompress\n'

  case "${LOGROTATE_INTERVAL}" in
    ( 'daily' )
      _log 'trace' 'Setting postfix logrotate interval to daily'
      LOGROTATE="${LOGROTATE}  rotate 4\n  daily\n"
      ;;

    ( 'weekly' )
      _log 'trace' 'Setting postfix logrotate interval to weekly'
      LOGROTATE="${LOGROTATE}  rotate 4\n  weekly\n"
      ;;

    ( 'monthly' )
      _log 'trace' 'Setting postfix logrotate interval to monthly'
      LOGROTATE="${LOGROTATE}  rotate 4\n  monthly\n"
      ;;

    ( * )
      _log 'warn' 'LOGROTATE_INTERVAL not found in _setup_logrotate'
      ;;

  esac

  echo -e "${LOGROTATE}}" >/etc/logrotate.d/maillog
}

function _setup_mail_summary
{
  local ENABLED_MESSAGE
  ENABLED_MESSAGE="Enabling Postfix log summary reports with recipient '${PFLOGSUMM_RECIPIENT}'"

  case "${PFLOGSUMM_TRIGGER}" in
    ( 'daily_cron' )
      _log 'debug' "${ENABLED_MESSAGE}"
      _log 'trace' 'Creating daily cron job for pflogsumm report'

      cat >/etc/cron.daily/postfix-summary << EOF
#!/bin/bash

/usr/local/bin/report-pflogsumm-yesterday ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}
EOF

      chmod +x /etc/cron.daily/postfix-summary
      ;;

    ( 'logrotate' )
      _log 'debug' "${ENABLED_MESSAGE}"
      _log 'trace' 'Add postrotate action for pflogsumm report'
      sed -i \
        "s|}|  postrotate\n    /usr/local/bin/postfix-summary ${HOSTNAME} ${PFLOGSUMM_RECIPIENT} ${PFLOGSUMM_SENDER}\n  endscript\n}\n|" \
        /etc/logrotate.d/maillog
      ;;

    ( 'none' )
      _log 'debug' 'Postfix log summary reports disabled'
      ;;

    ( * )
      _log 'warn' "Invalid value for PFLOGSUMM_TRIGGER: '${PFLOGSUMM_TRIGGER}'"
      ;;

  esac
}

function _setup_logwatch
{
  echo 'LogFile = /var/log/mail/freshclam.log' >>/etc/logwatch/conf/logfiles/clam-update.conf
  echo "MailFrom = ${LOGWATCH_SENDER}" >>/etc/logwatch/conf/logwatch.conf
  echo "Mailer = \"sendmail -t -f ${LOGWATCH_SENDER}\"" >>/etc/logwatch/conf/logwatch.conf

  case "${LOGWATCH_INTERVAL}" in
    ( 'daily' | 'weekly' )
      _log 'debug' "Enabling logwatch reports with recipient '${LOGWATCH_RECIPIENT}'"
      _log 'trace' "Creating ${LOGWATCH_INTERVAL} cron job for logwatch reports"

      local LOGWATCH_FILE INTERVAL

      LOGWATCH_FILE="/etc/cron.${LOGWATCH_INTERVAL}/logwatch"
      INTERVAL='--range Yesterday'

      if [[ ${LOGWATCH_INTERVAL} == 'weekly' ]]
      then
        INTERVAL="--range 'between -7 days and -1 days'"
      fi

      cat >"${LOGWATCH_FILE}" << EOF
#!/bin/bash

/usr/sbin/logwatch ${INTERVAL} --hostname ${HOSTNAME} --mailto ${LOGWATCH_RECIPIENT}
EOF
      chmod 744 "${LOGWATCH_FILE}"
      ;;

    ( 'none' )
      _log 'debug' 'Logwatch reports disabled.'
      ;;

    ( * )
      _log 'warn' "Invalid value for LOGWATCH_INTERVAL: '${LOGWATCH_INTERVAL}'"
      ;;

  esac
}