"Connection failed",
1 => "Success",
2 => "Invalid object received",
16 => "Access denied" );
function about() {
return array(1.0,
"Support for linking tt-rss instances together and sharing popular feeds.",
"fox",
true);
}
function init($host) {
$this->host = $host;
$host->add_hook($host::HOOK_PREFS_TABS, $this);
$host->add_handler("pref-instances", "*", $this);
$host->add_handler("public", "fbexport", $this);
$host->add_command("get-feeds", "receive popular feeds from linked instances", $this);
$host->add_hook($host::HOOK_UPDATE_TASK, $this);
}
function hook_update_task($args) {
_debug("Get linked feeds...");
$this->get_linked_feeds();
}
// Status codes:
// -1 - never connected
// 0 - no data received
// 1 - data received successfully
// 2 - did not receive valid data
// >10 - server error, code + 10 (e.g. 16 means server error 6)
function get_linked_feeds($instance_id = false) {
if ($instance_id)
$instance_qpart = "id = '$instance_id' AND ";
else
$instance_qpart = "";
if (DB_TYPE == "pgsql") {
$date_qpart = "last_connected < NOW() - INTERVAL '6 hours'";
} else {
$date_qpart = "last_connected < DATE_SUB(NOW(), INTERVAL 6 HOUR)";
}
$result = db_query("SELECT id, access_key, access_url FROM ttrss_linked_instances
WHERE $instance_qpart $date_qpart ORDER BY last_connected");
while ($line = db_fetch_assoc($result)) {
$id = $line['id'];
_debug("Updating: " . $line['access_url'] . " ($id)");
$fetch_url = $line['access_url'] . '/public.php?op=fbexport';
$post_query = 'key=' . $line['access_key'];
$feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
// try doing it the old way
if (!$feeds) {
$fetch_url = $line['access_url'] . '/backend.php?op=fbexport';
$feeds = fetch_file_contents($fetch_url, false, false, false, $post_query);
}
if ($feeds) {
$feeds = json_decode($feeds, true);
if ($feeds) {
if ($feeds['error']) {
$status = $feeds['error']['code'] + 10;
// access denied
if ($status == 16) {
db_query("DELETE FROM ttrss_linked_feeds
WHERE instance_id = '$id'");
}
} else {
$status = 1;
if (count($feeds['feeds']) > 0) {
db_query("DELETE FROM ttrss_linked_feeds
WHERE instance_id = '$id'");
foreach ($feeds['feeds'] as $feed) {
$feed_url = db_escape_string($feed['feed_url']);
$title = db_escape_string($feed['title']);
$subscribers = db_escape_string($feed['subscribers']);
$site_url = db_escape_string($feed['site_url']);
db_query("INSERT INTO ttrss_linked_feeds
(feed_url, site_url, title, subscribers, instance_id, created, updated)
VALUES
('$feed_url', '$site_url', '$title', '$subscribers', '$id', NOW(), NOW())");
}
} else {
// received 0 feeds, this might indicate that
// the instance on the other hand is rebuilding feedbrowser cache
// we will try again later
// TODO: maybe perform expiration based on updated here?
}
_debug("Processed " . count($feeds['feeds']) . " feeds.");
}
} else {
$status = 2;
}
} else {
$status = 0;
}
_debug("Status: $status");
db_query("UPDATE ttrss_linked_instances SET
last_status_out = '$status', last_connected = NOW() WHERE id = '$id'");
}
}
function get_feeds() {
$this->get_linked_feeds(false);
}
function get_prefs_js() {
return file_get_contents(dirname(__FILE__) . "/instances.js");
}
function hook_prefs_tabs($args) {
if ($_SESSION["access_level"] >= 10 || SINGLE_USER_MODE) {
?>".__("Instance")."";
print "";
print "";
}
function editSave() {
$id = db_escape_string($_REQUEST["id"]);
$access_url = db_escape_string($_REQUEST["access_url"]);
$access_key = db_escape_string($_REQUEST["access_key"]);
db_query("UPDATE ttrss_linked_instances SET
access_key = '$access_key', access_url = '$access_url',
last_connected = '1970-01-01'
WHERE id = '$id'");
}
function index() {
if (!function_exists('curl_init')) {
print "";
print_error("This functionality requires CURL functions. Please enable CURL in your PHP configuration (you might also want to disable open_basedir in php.ini) and reload this page.");
print "
";
}
print "";
print ""; #pane
PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_TAB,
"hook_prefs_tab", "prefInstances");
print "
"; #container
}
function fbexport() {
$access_key = db_escape_string($_POST["key"]);
// TODO: rate limit checking using last_connected
$result = db_query("SELECT id FROM ttrss_linked_instances
WHERE access_key = '$access_key'");
if (db_num_rows($result) == 1) {
$instance_id = db_fetch_result($result, 0, "id");
$result = db_query("SELECT feed_url, site_url, title, subscribers
FROM ttrss_feedbrowser_cache ORDER BY subscribers DESC LIMIT 100");
$feeds = array();
while ($line = db_fetch_assoc($result)) {
array_push($feeds, $line);
}
db_query("UPDATE ttrss_linked_instances SET
last_status_in = 1 WHERE id = '$instance_id'");
print json_encode(array("feeds" => $feeds));
} else {
print error_json(6);
}
}
function addInstance() {
print_hidden("op", "pref-instances");
print_hidden("method", "add");
print "".__("Instance")."
";
print "";
print "";
return;
}
function genHash() {
$hash = uniqid_short();
print json_encode(array("hash" => $hash));
}
function api_version() {
return 2;
}
}
?>