#!/bin/bash
set -e 

force=$1

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

cd /usr/share/yunohost/templates/dnsmasq

# Get IP address
ip=$(curl ip.yunohost.org 2>/dev/null || echo '0.0.0.0')

# Get IPv6 IP address
ipv6=$(ip route get 2000:: | grep -q "unreachable" && echo '' \
  || ip route get 2000:: | grep -v ' fe80:' | grep -v 'cache' | awk '{print $9}')

sudo mkdir -p /etc/dnsmasq.d

domain_list=$(sudo yunohost domain list --plain)

# Copy a configuration file for each YunoHost domain 
for domain in $domain_list; do
    cat domain.sed \
      | sed "s/{{ domain }}/$domain/g" \
      | sed "s/{{ ip }}/$ip/g" \
      | sudo tee $domain

    if [[ "$ipv6" != "" ]]; then
        echo "address=/$domain/$ipv6" | sudo tee -a $domain
    fi

    safe_copy $domain /etc/dnsmasq.d/$domain
done

# Remove old domains files
for file in /etc/dnsmasq.d/*.*; do
    domain=$(echo $file | sed 's|/etc/dnsmasq.d/||')
    [[ $domain_list =~ $domain ]] \
      || sudo yunohost service saferemove -s dnsmasq $file
done

sudo service dnsmasq reload