#! /bin/bash

# shellcheck disable=SC2094

# shellcheck source=../scripts/helper-functions.sh
. /usr/local/bin/helper-functions.sh

DATABASE=${DATABASE:-/tmp/docker-mailserver/postfix-accounts.cf}

function __usage
{
  printf "\e[35mADDMAILUSER\e[31m(\e[93m8\e[31m)

\e[38;5;214mNAME\e[39m
    addmailuser - add an email address (i.e. a user)

\e[38;5;214mSYNOPSIS\e[39m
    ./setup.sh email add <EMAIL ADDRESS> [<PASSWORD>]

\e[38;5;214mOPTIONS\e[39m
    \e[94mGeneric Program Information\e[39m
        help       Print the usage information.

\e[38;5;214mEXAMPLES\e[39m
    \e[37m./setup.sh email add test@domain.tld\e[39m
        Add the email account test@domain.tld. You will be prompted
        to input a password afterwards since no password was supplied.

\e[38;5;214mEXIT STATUS\e[39m
    Exit status is 0 if command was successful. If wrong arguments are provided
    or arguments contain errors, the script will exit early with exit status 1.

"
}

[[ ${1:-} == 'help' ]] && { __usage ; exit 0 ; }

FULL_EMAIL="${1}"
shift
PASSWD="${*}"

[[ -z ${FULL_EMAIL} ]] && { __usage ; errex 'No username specified' ; }
[[ "${FULL_EMAIL}" =~ .*\@.* ]] || { __usage ; errex 'Username must include the domain' ; }

# Protect config file with lock to avoid race conditions
touch "${DATABASE}"
create_lock "$(basename "$0")"
if grep -qi "^$(escape "${FULL_EMAIL}")|" "${DATABASE}"
then
  echo "User '${FULL_EMAIL}' already exists."
  exit 1
fi

if [[ -z ${PASSWD} ]]
then
  read -r -s -p "Enter Password: " PASSWD
  echo
  [[ -z ${PASSWD} ]] && errex "Password must not be empty"
fi

HASH="$(doveadm pw -s SHA512-CRYPT -u "${FULL_EMAIL}" -p "${PASSWD}")"
echo "${FULL_EMAIL}|${HASH}" >> "${DATABASE}"

USER="${FULL_EMAIL%@*}"
DOMAIN="${FULL_EMAIL#*@}"

# Tests fail if the creation of /var/mail/${DOMAIN}/${USER} doesn't happen fast enough after addmailuser executes (check-for-changes.sh race-condition)
if [[ -e "/tmp/docker-mailserver-config-chksum" ]] # Prevent infinite loop in tests like "checking accounts: user3 should have been added to /tmp/docker-mailserver/postfix-accounts.cf even when that file does not exist"
then
  while [[ ! -d "/var/mail/${DOMAIN}/${USER}" ]]
  do
    echo "Waiting for dovecot to create /var/mail/${DOMAIN}/${USER}..."
    sleep 1
  done
fi