Watch for regexp result changes on the web page

notify_site_changes.sh

#!/usr/bin/env bash

function send_telegram {
  echo "$1"
}

ver1path="$0.1.cache"
ver2path="$0.2.cache"
ver1=$(cat $ver1path)
curl --silent "https://9gag.com/gag/a2Z7Vpw" 2>&1 | grep 'fbq(' > "$ver2path"
ver2=$(cat $ver2path)
if [ "$ver1" != "$ver2" ];then
    send_telegram "$ver2"
    echo "$ver2" > $ver1path
fi