/**
* Writes single cache record into DB.
*
* @param string $key Cache key name
* @param mixed $data Serialized cache data
*
* @param boolean True on success, False on failure
*/
private function write_record($key, $data)
{
if (!$this->db) {
return false;
}
// don't attempt to write too big data sets
if (strlen($data) > $this->max_packet_size()) {
trigger_error("rcube_cache: max_packet_size ({$this->max_packet}) exceeded for key {$key}. Tried to write " . strlen($data) . " bytes", E_USER_WARNING);
return false;
}
if ($this->type == 'memcache' || $this->type == 'apc') {
$result = $this->add_record($this->ckey($key), $data);
// make sure index will be updated
if ($result) {
if (!array_key_exists($key, $this->cache_sums)) {
$this->cache_sums[$key] = true;
}
$this->load_index();
if (!$this->index_changed && !in_array($key, $this->index)) {
$this->index_changed = true;
}
}
return $result;
}
$db_key = $this->prefix . '.' . $key;
// Remove NULL rows (here we don't need to check if the record exist)
if ($data == 'N;') {
$result = $this->db->query("DELETE FROM {$this->table} WHERE `cache_key` = ?", $db_key);
return !$this->db->is_error($result);
}
$key_exists = array_key_exists($key, $this->cache_sums);
$expires = $this->ttl ? $this->db->now($this->ttl) : 'NULL';
if (!$key_exists) {
// Try INSERT temporarily ignoring "duplicate key" errors
$this->db->set_option('ignore_key_errors', true);
$result = $this->db->query("INSERT INTO {$this->table} (`expires`, `cache_key`, `data`)" . " VALUES ({$expires}, ?, ?)", $db_key, $data);
$this->db->set_option('ignore_key_errors', false);
}
// otherwise try UPDATE
if (!isset($result) || !($count = $this->db->affected_rows($result))) {
$result = $this->db->query("UPDATE {$this->table} SET `expires` = {$expires}, `data` = ?" . " WHERE `cache_key` = ?", $data, $db_key);
$count = $this->db->affected_rows($result);
}
return $count > 0;
}
/**
* Saves thread data into database
*/
private function add_thread_row($mailbox, $data, $mbox_data = array(), $exists = false)
{
$data = array($this->db->encode($data, true), (int) $this->skip_deleted, (int) $mbox_data['UIDVALIDITY'], (int) $mbox_data['UIDNEXT']);
$data = implode('@', $data);
$expires = $this->ttl ? $this->db->now($this->ttl) : 'NULL';
if ($exists) {
$res = $this->db->query("UPDATE {$this->thread_table}" . " SET `data` = ?, `expires` = {$expires}" . " WHERE `user_id` = ?" . " AND `mailbox` = ?", $data, $this->userid, $mailbox);
if ($this->db->affected_rows($res)) {
return;
}
}
$this->db->set_option('ignore_key_errors', true);
$res = $this->db->query("INSERT INTO {$this->thread_table}" . " (`user_id`, `mailbox`, `expires`, `data`)" . " VALUES (?, ?, {$expires}, ?)", $this->userid, $mailbox, $data);
// race-condition, insert failed so try update (#1489146)
// thanks to ignore_key_errors "duplicate row" errors will be ignored
if (!$exists && !$res && !$this->db->is_error($res)) {
$this->db->query("UPDATE {$this->thread_table}" . " SET `expires` = {$expires}, `data` = ?" . " WHERE `user_id` = ?" . " AND `mailbox` = ?", $data, $this->userid, $mailbox);
}
$this->db->set_option('ignore_key_errors', false);
}
/**
* Add the given contact records the a certain group
*
* @param string Group identifier
* @param array List of contact identifiers to be added
* @return int Number of contacts added
*/
function add_to_group($group_id, $ids)
{
if (!is_array($ids)) {
$ids = explode(self::SEPARATOR, $ids);
}
$added = 0;
$exists = array();
// get existing assignments ...
$sql_result = $this->db->query("SELECT contact_id FROM " . $this->db->table_name($this->db_groupmembers) . " WHERE contactgroup_id=?" . " AND contact_id IN (" . $this->db->array2list($ids, 'integer') . ")", $group_id);
while ($sql_result && ($sql_arr = $this->db->fetch_assoc($sql_result))) {
$exists[] = $sql_arr['contact_id'];
}
// ... and remove them from the list
$ids = array_diff($ids, $exists);
foreach ($ids as $contact_id) {
$this->db->query("INSERT INTO " . $this->db->table_name($this->db_groupmembers) . " (contactgroup_id, contact_id, created)" . " VALUES (?, ?, " . $this->db->now() . ")", $group_id, $contact_id);
if ($error = $this->db->is_error()) {
$this->set_error(self::ERROR_SAVING, $error);
} else {
$added++;
}
}
return $added;
}
