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

# 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 alias"
  echo ""
  echo "  -h          Print this help."
  echo ""
  echo "              Enter alias in full email address format."
  exit
}

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

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

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

# 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='$alias' AND vm_aliases.mbox_id=vm_mboxes.id AND vm_mboxes.domain_id=vm_domains.id AND vm_domains.domain='$domain'"
vm_aliases_id=`$dbcmd $dbcmdopts "$dbquery"`

if [ -z "$vm_aliases_id" ]; then
  echo "ERROR: Alias $searchterm does not exist."
  exit 1
elif [ "$vm_aliases_id" -gt '0' ]; then
  dbquery="DELETE FROM vm_aliases WHERE vm_aliases.id='$vm_aliases_id'"
  eval $dbcmd $dbcmdopts "\"$dbquery\""
  echo "SUCCESS: Alias $searchterm removed from system."
  exit 0
else
  echo "ERROR: System error querying vmail database"
  exit 1
fi