#!/usr/bin/env bash

function usage() {

        echo

        if [ -n "$1" ];then
           echo -e "Error: $1\n"
        fi
        echo -e "\nPrints a summary of mailboxes and forward addresse for the given domain.\n"
        echo -e "\tusage: `basename $0` <email domain>\n"
        exit 1
}


trim() {
    local var="$*"
    var="${var#"${var%%[![:space:]]*}"}"   # remove leading whitespace characters
    var="${var%"${var##*[![:space:]]}"}"   # remove trailing whitespace characters
    echo -n "$var"
}



[ $# -eq "0" -o $# -gt "2" ] && usage "wrong number of arguments"

address="$1"

domain=`echo $address | cut -d'@' -f2`

mysql=false
# - mysql_credential_args
# -
# - MySQL / MariaDB credentials
# -
# - Giving password on command line is insecure an sind mysql 5.5
# - you will get a warning doing so.
# - 
# - Reading username/password fro file ist also possible, using MySQL/MariaDB
# - commandline parameter '--defaults-file'.
# - 
# - Since Mysql Version 5.6, you can read username/password from
# - encrypted file.
# -
# -    Create (encrypted) option file:
# -    $ mysql_config_editor set --login-path=local --socket=/tmp/mysql.sock  --user=root --password
# -    $ Password:
# -
# -    Use of option file:
# -    $ mysql --login-path=local ...
# -
# - Example
# -    mysql_credential_args="--login-path=local"
# -    mysql_credential_args="--defaults-file=/etc/mysql/debian.cnf" (Debian default)
# -    mysql_credential_args="--defaults-file=/usr/local/mysql/sys-maint.cnf"
# -
mysql_credential_args="--defaults-file=/usr/local/mysql/sys-maint.cnf"
mysql_db=postfix

#echo "address...: $address"
#echo "domain....: $domain"

declare -A address_arr
declare -a orders
declare -a _tmp_mbox_arr
declare -a alias_arr
declare -a mbox_arr
declare -a mbox_alias_arr


echo ""
if $mysql ; then
   _addresses=$(mysql $mysql_credential_args $mysql_db  -N -s -e "select address from alias where domain = '$domain' ORDER BY address")
   for _address in $_addresses ; do
      address_arr[$_address]=$(trim $(mysql $mysql_credential_args $mysql_db  -N -s -e "select goto from alias where address = '$_address'"))
      orders+=("$(trim $_address)")
   done
else
      
   _addresses=$(su - postgres -c"psql postfix -t  -q -c\"select address from alias where domain = '$domain' ORDER BY address\"")
   for  _address in $_addresses ; do
      address_arr[$_address]=$(trim $(su - postgres -c"psql postfix -t -q -c\"select goto from alias where address = '$_address'\""))
      orders+=("$(trim $_address)")
   done
fi

# - Mailbox or only forward address?
# -
for i in ${!orders[@]}; do
   if [[ ${address_arr[${orders[$i]}]} =~ ${orders[$i]} ]]; then
      _tmp_mbox_arr+=(${orders[$i]})
   else
      alias_arr+=(${orders[$i]})
   fi
done

# - Mailbox with or witout forward addresses?
# -
for i in ${!_tmp_mbox_arr[@]} ; do
   found=false
   IFS=',' read -a _addr_list <<<"${address_arr[${_tmp_mbox_arr[$i]}]}"
   for j in ${!_addr_list[@]} ; do
      [[ ${_addr_list[$j]} =~ ${_tmp_mbox_arr[$i]} ]] && continue
      [[ ${_addr_list[$j]} =~ @autoreply ]] && continue
      found=true
      _forward_addresses="$_forward_addresses ${_addr_list[$j]}"
   done
   if ! $found ; then
      mbox_arr+=(${_tmp_mbox_arr[$i]})
   else
      mbox_alias_arr+=(${_tmp_mbox_arr[$i]})
      address_arr[${_tmp_mbox_arr[$i]}]=$(trim $_forward_addresses)
   fi
done
   
echo ""
echo "--------------------"
echo "- Zusammenfassung E-Mail Adressen der Domain \"$domain\""
echo "--------------------"




echo ""
echo "E-Mail Adressen: Postfach ohne Weiterleitungen:"
echo "-----------------------------------------------"

for i in ${!mbox_arr[@]} ; do
   echo "${mbox_arr[$i]}"
done

echo ""
echo "E-Mail Adressen: Postfach mit Weiterleitungen:"
echo "----------------------------------------------"

for i in ${!mbox_alias_arr[@]} ; do
   echo -e "${mbox_alias_arr[$i]}\n   --> ${address_arr[${mbox_alias_arr[$i]}]}"
   echo
done

echo ""
echo "E-Mail Adressen: Nur Weiterleitungen:"
echo "-------------------------------------"

for i in ${!alias_arr[@]} ; do
   [[ ${alias_arr[$i]} =~ ^abuse@ ]] && continue
   [[ ${alias_arr[$i]} =~ ^postmaster@ ]] && continue
   echo -en "${alias_arr[$i]}\n   -->"
   
   IFS=',' read -a _addr_list <<<"${address_arr[${alias_arr[$i]}]}"
   for j in ${!_addr_list[@]} ; do
      echo -n " ${_addr_list[$j]}"
   done
   echo
   echo
done

echo ""
exit 0