#!/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 "Delete email alias from vmail database."
  echo ""
  echo "usage: $thisfilename -d <domain>|-e <email> -a <alias>"
  echo ""
  echo "  -h            Print this help."
  echo "  -a <alias>    Alias to be deleted. Local part only."
  echo "  -d <domain>   Domain of alias to delete."
  echo "  -e <email>    Email that alias directs to to delete."
  echo ""
  echo "                Enter <domain> OR <email>. If <email> is specified"
  echo "                then just the alias to that address is deleted. If"
  echo "                domain is specific then all <alias>@<domain> aliases"
  echo "                are deleted (aliases can direct to multiple emails)."
}

vmail:getoptions "$@"

# check for alias
if [[ -z $alias ]]; then
  echo "alias is required"
  exit
fi

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

# if email set delete single alias
if [[ -n $email ]]; then
  # get aliases id which also works to confirm alias exists
  dbquery="SELECT vm_aliases.id FROM vm_aliases, vm_mboxes, vm_domains WHERE vm_aliases.alias='$alias' AND vm_aliases.mbox_id=vm_mboxes.id AND vm_mboxes.mbox='$mbox' AND vm_mboxes.domain_id=vm_domains.id AND vm_domains.domain='$domain'"
  vm_aliases_id=`$dbcmd $dbcmdopts "$dbquery"`
  if [[ -z $vm_aliases_id ]]; then
    echo "ERROR: Alias $alias@$domain -> $email does not exist."
    exit 1
  elif [ "$vm_aliases_id" -gt '0' ]; then
    dbquery="DELETE FROM vm_aliases WHERE vm_aliases.id='$vm_aliases_id'"
    echo $dbquery
    eval $dbcmd $dbcmdopts "\"$dbquery\""
    echo "SUCCESS: Alias $alias@$domain -> $email removed from system."
    exit 0
  else
    echo "ERROR: System error querying vmail database"
    exit 1
  fi
# if domain set then delete any and all aliases
elif [[ -n $domain ]]; then
  # get alias id array
  dbquery="SELECT vm_aliases.id FROM vm_aliases, vm_mboxes, vm_domains WHERE vm_aliases.alias='$alias' AND vm_aliases.mbox_id=vm_mboxes.id AND vm_mboxes.domain_id=vm_domains.id AND vm_domains.domain='$domain'"
  mapfile -t vm_alias_ids < <( $dbcmd $dbcmdopts "$dbquery" )
  if [[ -z $vm_alias_ids ]]; then
    echo "ERROR: Alias $alias@$domain does not exist."
    exit 1
  elif [[ ${#vm_alias_ids[@]} -gt '0' ]]; then
    for vm_alias_id in "${vm_alias_ids[@]}"; do
      dbquery="DELETE FROM vm_aliases WHERE vm_aliases.id='$vm_alias_id'"
      eval $dbcmd $dbcmdopts "\"$dbquery\""
    done
    echo "SUCCESS: Alias(s) for $alias@$domain removed from system."
  else
    echo "ERROR: Unknown error. vm_alias_count=0?"
    exit 1
  fi
else
  echo "You must specify either <domain> or <email>."
  exit 1
fi