#!/bin/bash

# Set the URL of the Atom feed
feed_url="https://fediverse.observer/new-servers.xml"

# Set the interval for checking for updates (in seconds)
interval=600

# Initialize last_update variable
last_update=""

while true; do
    # Get the date of the last update from the feed
    feed=$(curl -Ls "$feed_url")
    update_dates=$(echo "$feed" | xmlstarlet sel -N atom=http://www.w3.org/2005/Atom -t -v "//atom:entry/atom:published" | awk -v date="$last_update" '{ if ($0 == date) exit; print }')

    if [ -n "$update_dates" ]; then
        # Update the date of the last check
        last_update=$(echo "$update_dates" | head -1)

        # Get total count of last updated sites 
        update_count=$(echo "$update_dates" | wc -l)

        # Parse the feed and get the link of the first entry
        urls=$(echo "$feed" | xmlstarlet sel -N atom=http://www.w3.org/2005/Atom -t -v "//atom:entry/atom:link/@href" | head -n "$update_count" | awk -F'/' '{print $NF}' | sort | uniq -c | sort -nr | awk '{print $2}')

        for url in $urls; do
                cd /opt/fedi-block-api && sudo -Hu fba python3 fetch_instances.py "$url"
        done

    fi

    # Wait for the specified interval
    sleep $interval
done