sessioncommunities.online/php/fetch-servers.php

<?php
	// requires php-curl

	require_once 'getenv.php';
	require_once 'utils/utils.php';
	require_once 'servers/known-servers.php';
	include_once "$LANGUAGES_ROOT/language_flags.php"; // actually runs fine without it
	require_once 'utils/servers-rooms.php';

	function main() {
		global $LOGGING_VERBOSITY;
		// Get join links -> Add known servers ->
		// De-dupe based on base URL -> 
		// Test domains -> De-dupe based on pubkey
		
		$options = getopt("v", ["verbose"]);
		if (isset($options["v"]) or isset($options["verbose"])) {
			$LOGGING_VERBOSITY = LoggingVerbosity::Debug;
		}
		
		global $CACHE_ROOT, $ROOMS_FILE, $KNOWN_SERVERS, $KNOWN_PUBKEYS;

		file_exists($CACHE_ROOT) or mkdir($CACHE_ROOT, 0700);

		$html_pages = query_known_sources();
		// Find join links in each HTML document and concatenate the results.
		$join_links = array_merge([], ...array_map('parse_join_links', $html_pages));
		/**
		 * @var CommunityServer[] $servers
		 */
		$servers = CommunityServer::from_join_urls($join_links);
		// Add known hosts.
		$servers = [...CommunityServer::from_known_hosts($KNOWN_SERVERS, $KNOWN_PUBKEYS), ...$servers];
		$servers = CommunityServer::dedupe_by_url($servers);
		$servers = CommunityServer::poll_reachable($servers);
		$servers = CommunityServer::dedupe_by_pubkey($servers);
		$servers_total = count($servers);
		$rooms_total = count_rooms($servers);
		
		// Output query results to file.
		log_info("Done fetching communities.");
		log_info(
			"Found $rooms_total unique Session Communities " . 
			"on $servers_total servers." . PHP_EOL
		);
		file_put_contents($ROOMS_FILE, json_encode($servers));
	}

	/**
	 * Iteratively crawls an index for individual Session Community details.
	 * @return string[]
	 */
	function crawl_source_index($html, $url_base, $item_url_pattern) {		
		preg_match_all($item_url_pattern, $html, $match_result);
		$matched_links = $match_result[0];

		foreach ($matched_links as $link) {
			$link = $url_base . $link;
			log_debug("Requesting $link");
			$pages[] = file_get_contents($link);
			log_debug($http_response_header[0]); 
			// Supposed to be "HTTP/1.1 200 OK"
		}

		return $pages;
	}

	/**
	 * Fetches known sources of Session Community join links.
	 */
	function query_known_sources() {
		global $SOURCES;

		log_info("Requesting Awesome Session Group list...");
		$pages_asgl[] = file_get_contents($SOURCES['ASGL']);
		log_debug($http_response_header[0]); // Supposed to be "HTTP/1.1 200 OK"

		log_info("Requesting Lokilocker Mods Open Group list...");
		$pages_loki[] = file_get_contents($SOURCES['LOKI']);
		log_debug($http_response_header[0]); // Supposed to be "HTTP/1.1 200 OK"

		log_info("Requesting session.directory list...");
		$index_sdir = file_get_contents($SOURCES['SDIR']);
		log_debug($http_response_header[0]); // Supposed to be "HTTP/1.1 200 OK"

		log_info("Crawling session.directory list...");
		$pages_sdir = crawl_source_index(
			$index_sdir, 
			$SOURCES['SDIR-BASE'], 
			$SOURCES['SDIR-PATTERN']
		);

		log_info('Done fetching sources.');

		return [...$pages_asgl, ...$pages_loki, ...$pages_sdir];
	}

	/*
	 * Debug function to see which communities use pinned messages already
	 */
	function print_pinned_messages($room_assignments_arr) {
		// for each server a.k.a. public key do
		foreach($room_assignments_arr as $pubkey => $room_assignment) {
			// for every room do
			foreach($room_assignment[1] as $room_array) {
				// info:
				// $room_array = array(
				//	"token"        => bla,
				//	"name"         => Blabla,
				//	"active_users" => -1,
				//	"description"  => Blabla bla bla
				//);
				$server_url = $room_assignment[0];
				$room_json_url = $server_url . "/room/" . $room_array["token"];
				echo($room_json_url . PHP_EOL);
				$contents = file_get_contents($room_json_url);
				if($contents) {
//					print_r($contents);
					$json_obj = json_decode($contents);
					$pinned_messages = $json_obj->pinned_messages;
					echo("Pinned messages:" . PHP_EOL);
					print_r($pinned_messages);
				}
			}
		}
	}

	// run main function
	main();

?>