Horde_ActiveSync_Imap_Adapter::_doQuery PHP Method

    protected function _doQuery(array $query)
    {
        $imap_query = new Horde_Imap_Client_Search_Query();
        $imap_query->charset('UTF-8', false);
        $mboxes = array();
        $results = array();
        foreach ($query as $q) {
            switch ($q['op']) {
                case Horde_ActiveSync_Request_Search::SEARCH_AND:
                    return $this->_doQuery(array($q['value']), $range);
                default:
                    foreach ($q as $key => $value) {
                        switch ($key) {
                            case 'FolderType':
                                if ($value != Horde_ActiveSync::CLASS_EMAIL) {
                                    throw new Horde_ActiveSync_Exception('Only Email folders are supported.');
                                }
                                break;
                            case 'serverid':
                                $mboxes[] = new Horde_Imap_Client_Mailbox($value);
                                break;
                            case Horde_ActiveSync_Message_Mail::POOMMAIL_DATERECEIVED:
                                if ($q['op'] == Horde_ActiveSync_Request_Search::SEARCH_GREATERTHAN) {
                                    $query_range = Horde_Imap_Client_Search_Query::DATE_SINCE;
                                } elseif ($q['op'] == Horde_ActiveSync_Request_Search::SEARCH_LESSTHAN) {
                                    $query_range = Horde_Imap_Client_Search_Query::DATE_BEFORE;
                                } else {
                                    $query_range = Horde_Imap_Client_Search_Query::DATE_ON;
                                }
                                $imap_query->dateSearch($value, $query_range);
                                break;
                            case Horde_ActiveSync_Request_Search::SEARCH_FREETEXT:
                                $imap_query->text($value, false);
                                break;
                            case 'subquery':
                                $imap_query->andSearch(array($this->_buildSubQuery($value)));
                        }
                    }
            }
        }
        if (empty($mboxes)) {
            foreach ($this->getMailboxes() as $mailbox) {
                $mboxes[] = $mailbox['ob'];
            }
        }
        foreach ($mboxes as $mbox) {
            try {
                $search_res = $this->_getImapOb()->search($mbox, $imap_query, array('results' => array(Horde_Imap_Client::SEARCH_RESULTS_MATCH, Horde_Imap_Client::SEARCH_RESULTS_SAVE, Horde_Imap_Client::SEARCH_RESULTS_COUNT), 'sort' => array(Horde_Imap_Client::SORT_REVERSE, Horde_Imap_Client::SORT_ARRIVAL)));
            } catch (Horde_Imap_Client_Exception $e) {
                throw new Horde_ActiveSync_Exception($e);
            }
            if ($search_res['count'] == 0) {
                continue;
            }
            $ids = $search_res['match']->ids;
            foreach ($ids as $id) {
                $results[] = array('uniqueid' => $mbox->utf8 . ':' . $id, 'searchfolderid' => $mbox->utf8);
            }
            if (!empty($range)) {
                preg_match('/(.*)\\-(.*)/', $range, $matches);
                $return_count = $matches[2] - $matches[1];
                $results = array_slice($results, $matches[1], $return_count + 1, true);
            }
        }
        return $results;
    }