/**
* Fetches index data from IMAP server
*/
private function get_index_data($mailbox, $sort_field, $sort_order, $mbox_data = array())
{
$data = array();
if (empty($mbox_data)) {
$mbox_data = $this->imap->mailbox_data($mailbox);
}
// Prevent infinite loop.
// It happens when rcube_imap::message_index_direct() is called.
// There id2uid() is called which will again call get_index() and so on.
if (!$sort_field && !$this->skip_deleted) {
$this->icache['pending_index_update'] = true;
}
if ($mbox_data['EXISTS']) {
// fetch sorted sequence numbers
$data_seq = $this->imap->message_index_direct($mailbox, $sort_field, $sort_order);
// fetch UIDs
if (!empty($data_seq)) {
// Seek in internal cache
if (array_key_exists('index', (array) $this->icache[$mailbox]) && array_key_exists('result', (array) $this->icache[$mailbox]['index'])) {
$data_uid = $this->icache[$mailbox]['index']['result'];
} else {
$data_uid = $this->imap->conn->fetchUIDs($mailbox, $data_seq);
}
// build index
if (!empty($data_uid)) {
foreach ($data_seq as $seq) {
if ($uid = $data_uid[$seq]) {
$data[$seq] = $uid;
}
}
}
}
}
// Reset internal flags
$this->icache['pending_index_update'] = false;
return $data;
}