+function discover_users() {
+ logger("Discover users", LOGGER_DEBUG);
+
+ $users = q("SELECT `url`, `created`, `updated`, `last_failure`, `last_contact`, `server_url` FROM `gcontact`
+ WHERE `last_contact` < UTC_TIMESTAMP - INTERVAL 1 MONTH AND
+ `last_failure` < UTC_TIMESTAMP - INTERVAL 1 MONTH AND
+ `network` IN ('%s', '%s', '%s', '%s', '') ORDER BY rand()",
+ dbesc(NETWORK_DFRN), dbesc(NETWORK_DIASPORA),
+ dbesc(NETWORK_OSTATUS), dbesc(NETWORK_FEED));
+
+ if (!$users)
+ return;
+
+ $checked = 0;
+
+ foreach ($users AS $user) {
+
+ $urlparts = parse_url($user["url"]);
+ if (!isset($urlparts["scheme"])) {
+ q("UPDATE `gcontact` SET `network` = '%s' WHERE `nurl` = '%s'",
+ dbesc(NETWORK_PHANTOM), dbesc(normalise_link($user["url"])));
+ continue;
+ }
+
+ if (in_array($urlparts["host"], array("www.facebook.com", "facebook.com", "twitter.com",
+ "identi.ca", "alpha.app.net"))) {
+ $networks = array("www.facebook.com" => NETWORK_FACEBOOK,
+ "facebook.com" => NETWORK_FACEBOOK,
+ "twitter.com" => NETWORK_TWITTER,
+ "identi.ca" => NETWORK_PUMPIO,
+ "alpha.app.net" => NETWORK_APPNET);
+
+ q("UPDATE `gcontact` SET `network` = '%s' WHERE `nurl` = '%s'",
+ dbesc($networks[$urlparts["host"]]), dbesc(normalise_link($user["url"])));
+ continue;
+ }
+
+ if ($user["server_url"] != "")
+ $server_url = $user["server_url"];
+ else
+ $server_url = poco_detect_server($user["url"]);
+
+ if (poco_check_server($server_url, $gcontacts[0]["network"])) {
+ logger('Check user '.$user["url"]);
+ poco_last_updated($user["url"], true);
+
+ if (++$checked > 100)
+ return;
+ } else
+ q("UPDATE `gcontact` SET `last_failure` = '%s' WHERE `nurl` = '%s'",
+ dbesc(datetime_convert()), dbesc(normalise_link($user["url"])));
+ }
+}
+