tt-rss/update_daemon.php

#!/usr/bin/php4
<?
	// this daemon runs in the background and updates all feeds
	// continuously

	define('SLEEP_INTERVAL', 10); // seconds

	// TODO: allow update scheduling from users

	define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');

	define('DISABLE_SESSIONS', true);

	require_once "sanity_check.php";
	require_once "config.php";
	require_once "db.php";
	require_once "db-prefs.php";
	require_once "functions.php";
	require_once "magpierss/rss_fetch.inc";

	$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);	

	if (!$link) {
		if (DB_TYPE == "mysql") {
			print mysql_error();
		}
		// PG seems to display its own errors just fine by default.		
		return;
	}

	if (DB_TYPE == "pgsql") {
		pg_query("set client_encoding = 'utf-8'");
	}

	while (true) {

		// FIXME: get all scheduled updates w/forced refetch

#		$result = db_query($link, "SELECT * FROM ttrss_scheduled_updates ORDER BY id");
#		while ($line = db_fetch_assoc($result)) {
#			print "Scheduled feed update: " . $line["feed_id"] . ", UID: " . 
#				$line["owner_uid"] . "\n";
#		}
	
		// Process all other feeds using last_updated and interval parameters

		$result = db_query($link, "SELECT feed_url,id,owner_uid,
			SUBSTRING(last_updated,1,19) AS last_updated,
			update_interval FROM ttrss_feeds ORDER BY last_updated DESC");
	
		while ($line = db_fetch_assoc($result)) {
	
			print "Checking feed: " . $line["feed_url"] . "\n";
	
			$upd_intl = $line["update_interval"];
	
			$user_id = $line["owner_uid"];
	
			if (!$upd_intl || $upd_intl == 0) {
				$upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
			}
	
	#		printf("%d ? %d\n", time() - strtotime($line["last_updated"]) > $upd_intl*60,
	#			$upd_intl*60);
	
			if (!$line["last_updated"] || 
				time() - strtotime($line["last_updated"]) > ($upd_intl * 60)) {
	
				print "Updating...\n";
	
				update_rss_feed($link, $line["feed_url"], $line["id"], true);
	
			}
		}

		print "Sleeping for " . SLEEP_INTERVAL . " seconds...\n";
		
		sleep(SLEEP_INTERVAL);
	}

	db_close($link);

?>