#!/bin/bash

function ProgressBar {
  let _progress=(${1}*100/${2}*100)/100
  let _done=(${_progress}*4)/10
  let _left=40-$_done
  _fill=$(printf "%${_done}s")
  _empty=$(printf "%${_left}s")
  printf "\rAdd routes to route table (${1}/${2}): [${_fill// /#}${_empty// /-}] ${_progress}%%"
}

# Variables
file_raw="russian_subnets_list_raw.txt"
# file_user="subnets_user_list.txt"
file_for_calc="russian_subnets_list_raw_for_calc.txt"
file_processed="russian_subnets_list_processed.txt"
gateway_for_internal_ip=`ip route | awk '/default/ {print $3; exit}'`
interface=`ip route | awk '/default/ {print $5; exit}'`

# Get addresses RU segment
echo "Download RU subnets..."
curl --progress-bar "https://stat.ripe.net/data/country-resource-list/data.json?resource=ru" | jq -r ".data.resources.ipv4[]" > $file_raw

echo "Deaggregate subnets..."
cat $file_raw |grep "-" > $file_for_calc
cat $file_raw |grep -v "-" > $file_processed
for line in $(cat $file_for_calc); do
  ipcalc --no-decorate -d $line >> $file_processed;
done

# if [ -e $file_user  ]; then echo "Add user subnets..."; cat $file_user |grep -v "#" >> $file_processed; fi

# Flush route table
echo "Flush route table (down interface $interface)..."
ifdown $interface > /dev/null 2>&1
echo "Up interface $interface..."
ifup $interface > /dev/null 2>&1

# Add route
routes_count_in_file=`wc -l $file_processed`
routes_count_current=0
for line in $(cat $file_processed); do
  ip route add $line via $gateway_for_internal_ip dev $interface
  let "routes_count_current+=1"
  ProgressBar ${routes_count_current} ${routes_count_in_file}
done
echo ""

echo "Remove temp files..."
rm $file_raw $file_processed $file_json $file_for_calc

routes_count=`ip r | wc -l`
echo "Routes in routing table: $routes_count"