set -e 

force=$1

function safe_copy () {
    if [[ "$force" == "True" ]]; then
        sudo yunohost service safecopy \
          -s postfix \
          $1 $2 \
          --force
    else
        sudo yunohost service safecopy \
          -s postfix \
          $1 $2
    fi
}

cd /usr/share/yunohost/templates/postfix

# Copy plain single configuration files
files="header_checks
ldap-accounts.cf
ldap-aliases.cf
ldap-domains.cf
master.cf
sender_canonical
smtp_reply_filter"

for file in $files; do
    safe_copy $file /etc/postfix/$file
done

main_domain=$(cat /etc/yunohost/current_host)

# Replace main domain in the main configuration file
cat main.cf.sed \
  | sed "s/{{ main_domain }}/$main_domain/g" \
  | sudo tee main.cf

# And adapt it to IPv4-only hosts
if [ ! -f /proc/net/if_inet6 ]; then
    sudo sed -i \
      's/ \[::ffff:127.0.0.0\]\/104 \[::1\]\/128//g' \
      main.cf

    sudo sed -i \
      's/inet_interfaces = all/inet_interfaces = all\ninet_protocols = ipv4/' \
      main.cf
fi

if [[ $(safe_copy main.cf /etc/postfix/main.cf) == "True" ]]; then
    sudo service postfix restart
else
    sudo service postfix reload \
      || sudo service postfix restart
fi