#!/bin/bash

set -e

do_pre_regen() {
  pending_dir=$1

  cd /usr/share/yunohost/templates/dovecot

  dovecot_dir="${pending_dir}/etc/dovecot"
  mkdir -p "${dovecot_dir}/global_script"

  # copy simple conf files
  cp dovecot-ldap.conf "${dovecot_dir}/dovecot-ldap.conf"
  cp dovecot.sieve "${dovecot_dir}/global_script/dovecot.sieve"

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

  # adapt it for IPv4-only hosts
  if [ ! -f /proc/net/if_inet6 ]; then
    sed -i \
      's/^\(listen =\).*/\1 */' \
      "${dovecot_dir}/dovecot.conf"
  fi

  mkdir -p "${dovecot_dir}/yunohost.d"
  cp pre-ext.conf "${dovecot_dir}/yunohost.d"
  cp post-ext.conf "${dovecot_dir}/yunohost.d"
}

do_post_regen() {
  regen_conf_files=$1

  sudo mkdir -p "/etc/dovecot/yunohost.d/pre-ext.d"
  sudo mkdir -p "/etc/dovecot/yunohost.d/post-ext.d"

  # create vmail user
  id vmail > /dev/null 2>&1 \
    || sudo adduser --system --ingroup mail --uid 500 vmail

  # fix permissions
  sudo chown -R vmail:mail /etc/dovecot/global_script
  sudo chmod 770 /etc/dovecot/global_script
  sudo chown root:mail /var/mail
  sudo chmod 1775 /var/mail

  [ -z "$regen_conf_files" ] && exit 0

  # compile sieve script
  [[ "$regen_conf_files" =~ dovecot\.sieve ]] && {
    sudo sievec /etc/dovecot/global_script/dovecot.sieve
    sudo chown -R vmail:mail /etc/dovecot/global_script
  }

  sudo service dovecot 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