/**
* Return all messages in the result.
*
* @return array List of message identifiers
*/
public function get_compressed()
{
if (empty($this->raw_data)) {
return '';
}
return rcube_imap_generic::compressMessageSet($this->get());
}
/**
* Checks index/thread validity
*/
private function validate($mailbox, $index, &$exists = true)
{
$object = $index['object'];
$is_thread = is_a($object, 'rcube_result_thread');
// sanity check
if (empty($object)) {
return false;
}
$index['validated'] = true;
// Get mailbox data (UIDVALIDITY, counters, etc.) for status check
$mbox_data = $this->imap->folder_data($mailbox);
// @TODO: Think about skipping validation checks.
// If we could check only every 10 minutes, we would be able to skip
// expensive checks, mailbox selection or even IMAP connection, this would require
// additional logic to force cache invalidation in some cases
// and many rcube_imap changes to connect when needed
// Check UIDVALIDITY
if ($index['validity'] != $mbox_data['UIDVALIDITY']) {
$this->clear($mailbox);
$exists = false;
return false;
}
// Folder is empty but cache isn't
if (empty($mbox_data['EXISTS'])) {
if (!$object->is_empty()) {
$this->clear($mailbox);
$exists = false;
return false;
}
} else {
if ($object->is_empty()) {
unset($this->icache[$mailbox][$is_thread ? 'thread' : 'index']);
return false;
}
}
// Validation flag
if (!$is_thread && empty($index['valid'])) {
unset($this->icache[$mailbox]['index']);
return false;
}
// Index was created with different skip_deleted setting
if ($this->skip_deleted != $index['deleted']) {
return false;
}
// Check HIGHESTMODSEQ
if (!empty($index['modseq']) && !empty($mbox_data['HIGHESTMODSEQ']) && $index['modseq'] == $mbox_data['HIGHESTMODSEQ']) {
return true;
}
// Check UIDNEXT
if ($index['uidnext'] != $mbox_data['UIDNEXT']) {
unset($this->icache[$mailbox][$is_thread ? 'thread' : 'index']);
return false;
}
// @TODO: find better validity check for threaded index
if ($is_thread) {
// check messages number...
if (!$this->skip_deleted && $mbox_data['EXISTS'] != $object->count_messages()) {
return false;
}
return true;
}
// The rest of checks, more expensive
if (!empty($this->skip_deleted)) {
// compare counts if available
if (!empty($mbox_data['UNDELETED']) && $mbox_data['UNDELETED']->count() != $object->count()) {
return false;
}
// compare UID sets
if (!empty($mbox_data['UNDELETED'])) {
$uids_new = $mbox_data['UNDELETED']->get();
$uids_old = $object->get();
if (count($uids_new) != count($uids_old)) {
return false;
}
sort($uids_new, SORT_NUMERIC);
sort($uids_old, SORT_NUMERIC);
if ($uids_old != $uids_new) {
return false;
}
} else {
// get all undeleted messages excluding cached UIDs
$ids = $this->imap->search_once($mailbox, 'ALL UNDELETED NOT UID ' . rcube_imap_generic::compressMessageSet($object->get()));
if (!$ids->is_empty()) {
return false;
}
}
} else {
// check messages number...
if ($mbox_data['EXISTS'] != $object->count()) {
return false;
}
// ... and max UID
if ($object->max() != $this->imap->id2uid($mbox_data['EXISTS'], $mailbox)) {
return false;
}
}
return true;
}
/**
* Checks if the cache is up-to-date
*
* @param string $mailbox Mailbox name
* @param string $cache_key Internal cache key
* @return int Cache status: -3 = off, -2 = incomplete, -1 = dirty, 1 = OK
*/
private function check_cache_status($mailbox, $cache_key)
{
if (!$this->caching_enabled) {
return -3;
}
$cache_index = $this->get_message_cache_index($cache_key);
$msg_count = $this->_messagecount($mailbox);
$cache_count = count($cache_index);
// empty mailbox
if (!$msg_count) {
return $cache_count ? -2 : 1;
}
if ($cache_count == $msg_count) {
if ($this->skip_deleted) {
if (!empty($this->icache['all_undeleted_idx'])) {
$uids = rcube_imap_generic::uncompressMessageSet($this->icache['all_undeleted_idx']);
$uids = array_flip($uids);
foreach ($cache_index as $uid) {
unset($uids[$uid]);
}
} else {
// get all undeleted messages excluding cached UIDs
$uids = $this->search_once($mailbox, 'ALL UNDELETED NOT UID ' . rcube_imap_generic::compressMessageSet($cache_index));
}
if (empty($uids)) {
return 1;
}
} else {
// get UID of the message with highest index
$uid = $this->_id2uid($msg_count, $mailbox);
$cache_uid = array_pop($cache_index);
// uids of highest message matches -> cache seems OK
if ($cache_uid == $uid) {
return 1;
}
}
// cache is dirty
return -1;
}
// if cache count differs less than 10% report as dirty
return abs($msg_count - $cache_count) < $msg_count / 10 ? -1 : -2;
}
