#!/bin/bash
#
# vmail-stack
# https://git.stack-source.com/msb/vmail-stack
# Copyright (c) 2022 Matthew Saunders Brown <matthewsaundersbrown@gmail.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

# load include file
source $(dirname $0)/vmail.sh

help()
{
  thisfilename=$(basename -- "$0")
  echo "$thisfilename"
  echo "Export vmail settings, for backups and/or migrating to a new server."
  echo ""
  echo "usage: $thisfilename -d <domain> [-v] [-h]"
  echo ""
  echo "  -h              Print this help."
  echo "  -d              Domain to export settings for."
  echo "  -v              Verbose - output instructions for sycning vmail domain to new server, if verbose option was enabled."
  exit
}

vmail:getoptions "$@"

# check for domain
if [[ -z $domain ]]; then
  echo "ERROR: domain name is required"
  exit 1
fi

# build query
dbcmd="mysql --defaults-extra-file=$MYSQL_CONNECTION_INFO_FILE"
dbcmdopts="-s -r -N -e"

# check if domain exists in vmail database
dbquery="SELECT id FROM vm_domains WHERE domain='$domain';"
domains_id=`$dbcmd $dbcmdopts "$dbquery"`

if [[ "$domains_id" -gt '0' ]] ; then

  if [[ -d /var/vmail/$domain ]]; then

    if [[ -d /var/vmail/$domain/.exp/ ]]; then
      # remove existing export data
      rm -r /var/vmail/$domain/.exp/
    fi

    # create new export dir
    install --owner=vmail --group=vmail --mode=750 --directory /var/vmail/$domain/.exp/

    # create new empty dump file
    install --owner=vmail --group=vmail --mode=640 /dev/null /var/vmail/$domain/.exp/vm_dmp.sql

    # create array of vm db tables
    vmDbTableArray=("vm_domains" "vm_mboxes" "vm_aliases" "vm_autoresponders" "vm_filters" "vm_forwards")
    # dump data from each table
    for vmDbTable in ${vmDbTableArray[@]}; do
      eval mysqldump --defaults-extra-file=$MYSQL_CONNECTION_INFO_FILE --no-create-info --extended-insert=FALSE --complete-insert --compact vmail $vmDbTable --where="\"domain='$domain'"\"|sed -e "s/(\`id\`,/(/"|sed -e "s/([0-9]*,/(/" >> /var/vmail/$domain/.exp/vm_dmp.sql
    done
    # handle special cases vm_greylisting & sa_userpref
    eval mysqldump --defaults-extra-file=$MYSQL_CONNECTION_INFO_FILE --no-create-info --extended-insert=FALSE --complete-insert --compact vmail vm_greylisting --where="\"recipient LIKE '%@$domain'"\"|sed -e "s/(\`id\`,/(/"|sed -e "s/([0-9]*,/(/" >> /var/vmail/$domain/.exp/vm_dmp.sql
    eval mysqldump --defaults-extra-file=$MYSQL_CONNECTION_INFO_FILE --no-create-info --extended-insert=FALSE --complete-insert --compact vmail sa_userpref --where="\"username LIKE '%@$domain'"\"|sed -e "s/, \`prefid\`)/)/"|sed -e "s/,[0-9]*);/);/" >> /var/vmail/$domain/.exp/vm_dmp.sql

    # apache webmail config
    if [[ -f /etc/apache2/sites-available/mail.$domain.conf ]]; then
      cp --archive --parents /etc/apache2/sites-*/mail.$domain.conf /var/vmail/$domain/.exp/
    fi

    # letsencrypt certificate
    if [[ -f /etc/letsencrypt/renewal/mail.$domain.conf ]]; then
      cp --archive --parents /etc/letsencrypt/archive/mail.$domain/ /var/vmail/$domain/.exp/
      cp --archive --parents /etc/letsencrypt/live/mail.$domain/ /var/vmail/$domain/.exp/
      cp --archive --parents /etc/letsencrypt/renewal/mail.$domain.conf /var/vmail/$domain/.exp/
    fi

    # letsencrypt pem file
    if [[ -f /etc/ssl/letsencrypt/mail.$domain.pem ]]; then
      cp --archive --parents /etc/ssl/letsencrypt/mail.$domain.pem /var/vmail/$domain/.exp/
    fi

    # dkim files
    if [[ -f /etc/ssl/dkim/$domain.dkim ]]; then
      cp --archive --parents /etc/ssl/dkim/$domain.* /var/vmail/$domain/.exp/
    fi

    # dovecot config
    if [[ -f /etc/dovecot/sites.d/mail.$domain.conf ]]; then
      cp --archive --parents /etc/dovecot/sites.d/mail.$domain.conf /var/vmail/$domain/.exp/
    fi

    if [[ -x /usr/local/bin/vmail-roundcubemail-settings-export.php ]]; then
      /usr/local/bin/vmail-roundcubemail-settings-export.php $domain
    fi

    # output instructions for sycning website to new server, if verbose option was enabled.
    if [[ -n $verbose ]]; then

      servername=`hostname -f`

      echo
      echo "Vmail configs for $domain have been exported."
      echo "To migrate to a new server run these commands (as root) from the new server:"
      echo
      echo "rsync -v --archive --relative --rsh=/usr/bin/ssh root@$servername:/var/vmail/$domain /"
      echo "vmail-domains-imp.sh -d $domain"

    fi

  else

    echo "$domain exists in vmail db, but /var/vmail/$domain dir does not exist."
    exit 1

  fi

elif [[ -z $domains_id ]] ; then
  echo "ERROR: $domain does not exist in vmail database."
  exit 1
else
  echo "ERROR: System error querying vmail database"
  exit 1
fi