#!/bin/bash
#
# vmail-stack
# https://git.stack-source.com/msb/vmail-stack
# MIT License Copyright (c) 2021 Matthew Saunders Brown

# load config
source /usr/local/etc/vmail.conf

help()
{
  thisfilename=$(basename -- "$0")
  echo "$thisfilename"
  echo "Delete email account."
  echo ""
  echo "usage: $thisfilename fullemail"
  echo ""
  echo "  -f          Force - don't prompt for confirmation."
  echo "  -h          Print this help."
  echo ""
  echo "              Enter account to delete in full email address format."
  exit
}

# check for and set email address info
if [ -n "$1" ]; then
  if [ $1 == "-h" ]; then
    help
  elif [[ ! $1 =~ ^- ]] ; then
    email=$1
    shift
    if [[ $email =~ "@" ]] ; then
      local_part=${email%@*}
      domain=${email##*@}
      if ! vmail::validate_domain $domain; then
        echo "ERROR: $domain is not a valid domain name."
        exit 1
      fi
    else
      echo "ERROR: $email is not a valid email address."
      help
    fi
  fi
fi

# set any options that were passed
while getopts "fh" opt; do
  case "${opt}" in
    f )
      force=true
      ;;
    h )
      help
      exit;;
    \? )
      echo "Invalid option: $OPTARG" 1>&2
      exit;;
  esac
done

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

# get email address id which also works to confirm address exists
dbquery="SELECT vm_mboxes.id FROM vm_mboxes, vm_domains WHERE vm_mboxes.mbox='$local_part' AND vm_mboxes.domain_id=vm_domains.id AND vm_domains.domain='$domain'"
mboxes_id=`$dbcmd $dbcmdopts "$dbquery"`

if [ -z "$mboxes_id" ]; then
  echo "ERROR: Email address $email does not exist."
  exit 1
elif [ "$mboxes_id" -gt '0' ]; then
  if [ -n "$force" ] || vmail::yesno "Delete $email now?"; then
    dbquery="DELETE FROM vm_mboxes WHERE vm_mboxes.id='$mboxes_id'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM sa_userpref WHERE username='$email'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM vm_aliases WHERE mbox_id='$mboxes_id'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM vm_autoresponders WHERE mbox_id='$mboxes_id'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM vm_filters WHERE mbox_id='$mboxes_id'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM vm_forwards WHERE mbox_id='$mboxes_id'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM vm_greylisting WHERE recipient='$email'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    dbquery="DELETE FROM vm_greylisting WHERE recipient LIKE '$local_part+%@$domain'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    # this should be sufficient for rc due to ON DELETE CASCADE foreign key references
    dbquery="DELETE FROM rc_users WHERE username='$email'"
    echo $dbcmd $dbcmdopts "\"$dbquery\""
    echo "rm -r $VMAIL_DIR/$domain/$local_part"
    echo "SUCCESS: $email removed from system."
    exit 0
  fi
else
  echo "ERROR: System error querying vmail database"
  exit 1
fi