#!/bin/bash

set -e

do_pre_regen() {
  pending_dir=$1

  cd /usr/share/yunohost/templates/postfix

  postfix_dir="${pending_dir}/etc/postfix"
  mkdir -p "$postfix_dir"

  # install plain conf files
  cp plain/* "$postfix_dir"

  # prepare main.cf conf file
  main_domain=$(cat /etc/yunohost/current_host)
  cat main.cf \
    | sed "s/{{ main_domain }}/${main_domain}/g" \
    > "${postfix_dir}/main.cf"

  # adapt it for IPv4-only hosts
  if [ ! -f /proc/net/if_inet6 ]; then
    sed -i \
      's/ \[::ffff:127.0.0.0\]\/104 \[::1\]\/128//g' \
      "${postfix_dir}/main.cf"
    sed -i \
      's/inet_interfaces = all/&\ninet_protocols = ipv4/' \
      "${postfix_dir}/main.cf"
  fi
}

do_post_regen() {
  regen_conf_files=$1

  [[ -z "$regen_conf_files" ]] \
    || sudo service postfix restart
}

FORCE=${2:-0}
DRY_RUN=${3:-0}

case "$1" in
  pre)
    do_pre_regen $4
    ;;
  post)
    do_post_regen $4
    ;;
  *)
    echo "hook called with unknown argument \`$1'" >&2
    exit 1
    ;;
esac

exit 0