/**
* Listens to requests to check the IMAP inbox.
*
* If a POST request is made to check the IMAP inbox, RBE will actually
* process this request in this function. We also make sure that WP-cron is
* running before pinging the IMAP inbox.
*
* @since 1.0-RC3
*
* @see bp_rbe_spawn_inbox_check()
*/
function bp_rbe_run_inbox_listener()
{
if (empty($_POST['_bp_rbe_check'])) {
return;
}
// make sure WP-cron isn't running
if (defined('DOING_CRON') || isset($_GET['doing_wp_cron'])) {
return;
}
if (bp_rbe_is_connecting(array('clearcache' => true))) {
return;
}
if (bp_rbe_is_connected()) {
return;
}
bp_rbe_add_imap_lock();
// run our inbox check
$imap = BP_Reply_By_Email_IMAP::init();
$imap = $imap->run();
// Do not run the inbox check again on failure.
if (false === $imap) {
remove_action('shutdown', 'bp_rbe_spawn_inbox_check');
}
// kill the rest of this page
die;
}
/**
* The main method we use to parse an IMAP inbox.
*/
public function run()
{
// $instance must be initialized before we go on!
if (self::$instance === false) {
return false;
}
// If safe mode isn't on, then let's set the execution time to unlimited
if (!ini_get('safe_mode')) {
set_time_limit(0);
}
// Try to connect
$connect = $this->connect();
if (!$connect) {
return false;
}
// Total duration we should keep the IMAP stream alive for in seconds
$duration = bp_rbe_get_execution_time();
bp_rbe_log('--- Keep alive for ' . $duration / 60 . ' minutes ---');
bp_rbe_remove_imap_lock();
// Mark the current timestamp, mark the future time when we should close the IMAP connection;
// Do our parsing until $future > $now; re-mark the timestamp at end of loop... rinse and repeat!
for ($now = time(), $future = time() + $duration; $future > $now; $now = time()) {
// Get number of messages
$message_count = imap_num_msg($this->connection);
// If there are messages in the inbox, let's start parsing!
if ($message_count != 0) {
// According to this:
// http://www.php.net/manual/pl/function.imap-headerinfo.php#95012
// This speeds up rendering the email headers... could be wrong
imap_headers($this->connection);
bp_rbe_log('- Checking inbox -');
// Loop through each email message
for ($i = 1; $i <= $message_count; ++$i) {
// flush object cache if necessary
//
// we only flush the cache if the default object cache is in use
// why? b/c the default object cache is only meant for single page loads and
// since RBE runs in the background, we need to flush the object cache so WP
// will do a direct DB query for the next data fetch
if (!wp_using_ext_object_cache()) {
wp_cache_flush();
}
self::$html = false;
$content = self::body_parser($this->connection, $i);
$headers = $this->get_mail_headers($this->connection, $i);
$data = array('headers' => $headers, 'to_email' => BP_Reply_By_Email_Parser::get_header($headers, 'To'), 'from_email' => BP_Reply_By_Email_Parser::get_header($headers, 'From'), 'content' => $content, 'is_html' => self::$html, 'subject' => imap_utf8(BP_Reply_By_Email_Parser::get_header($headers, 'Subject')));
$parser = BP_Reply_By_Email_Parser::init($data, $i);
if (is_wp_error($parser)) {
//do_action( 'bp_rbe_imap_no_match', $this->connection, $i, $headers, $parser->get_error_code() );
do_action('bp_rbe_no_match', $parser, $data, $i, $this->connection);
}
// do something during the loop
// we mark the message for deletion here via this hook
do_action('bp_rbe_imap_loop', $this->connection, $i);
// unset some variables at the end of the loop
unset($content, $headers, $data, $parser);
}
// do something after the loop
do_action('bp_rbe_imap_after_loop', $this->connection);
}
// stop the loop if necessary
if (bp_rbe_should_stop()) {
if ($this->close()) {
bp_rbe_log('--- Manual termination of connection confirmed! Kaching! ---');
} else {
bp_rbe_log('--- Error - invalid connection during manual termination ---');
}
remove_action('shutdown', 'bp_rbe_spawn_inbox_check');
exit;
}
// Give IMAP server a break
sleep(10);
// If the IMAP connection is down, reconnect
if (!imap_ping($this->connection)) {
bp_rbe_log('-- IMAP connection is down, attempting to reconnect... --');
if (bp_rbe_is_connecting(array('clearcache' => true))) {
bp_rbe_log('--- RBE is already attempting to connect - stopping connection attempt ---');
continue;
}
// add lock marker before connecting
bp_rbe_add_imap_lock();
// attempt to reconnect
$reopen = BP_Reply_By_Email_Connect::init(array('reconnect' => true), $this->connection);
if ($reopen) {
bp_rbe_log('-- Reconnection successful! --');
} else {
bp_rbe_log('-- Reconnection failed! :( --');
bp_rbe_log('Cannot connect: ' . imap_last_error());
// cleanup RBE after failure
bp_rbe_cleanup();
remove_action('shutdown', 'bp_rbe_spawn_inbox_check');
exit;
}
}
// Unset some variables to clear some memory
unset($message_count);
}
if ($this->close()) {
bp_rbe_log('--- Closing current connection automatically ---');
} else {
bp_rbe_log('--- Invalid connection during close time ---');
}
// autoconnect is off
if (1 !== (int) bp_rbe_get_setting('keepaliveauto', array('refetch' => true))) {
remove_action('shutdown', 'bp_rbe_spawn_inbox_check');
// sleep a bit before autoconnecting again
} else {
sleep(5);
}
exit;
}