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<?php
/*
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| Copyright (C) 2005-2011, The Roundcube Dev Team |
| Copyright (C) 2011, Kolab Systems AG |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| PURPOSE: |
| SORT/SEARCH/ESEARCH response handler |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
| Author: Aleksander Machniak <alec@alec.pl> |
+-----------------------------------------------------------------------+
*/
/**
* Class for accessing IMAP's SORT/SEARCH/ESEARCH result
*
* @package Framework
* @subpackage Storage
*/
class rcube_result_index
{
protected $raw_data;
protected $mailbox;
protected $meta = array();
protected $params = array();
protected $order = 'ASC';
const SEPARATOR_ELEMENT = ' ';
/**
* Object constructor.
*/
public function __construct($mailbox = null, $data = null)
{
$this->mailbox = $mailbox;
$this->init($data);
}
/**
* Initializes object with SORT command response
*
* @param string $data IMAP response string
*/
public function init($data = null)
{
$this->meta = array();
$data = explode('*', (string)$data);
// ...skip unilateral untagged server responses
for ($i=0, $len=count($data); $i<$len; $i++) {
$data_item = &$data[$i];
if (preg_match('/^ SORT/i', $data_item)) {
// valid response, initialize raw_data for is_error()
$this->raw_data = '';
$data_item = substr($data_item, 5);
break;
}
else if (preg_match('/^ (E?SEARCH)/i', $data_item, $m)) {
// valid response, initialize raw_data for is_error()
$this->raw_data = '';
$data_item = substr($data_item, strlen($m[0]));
if (strtoupper($m[1]) == 'ESEARCH') {
$data_item = trim($data_item);
// remove MODSEQ response
if (preg_match('/\(MODSEQ ([0-9]+)\)$/i', $data_item, $m)) {
$data_item = substr($data_item, 0, -strlen($m[0]));
$this->params['MODSEQ'] = $m[1];
}
// remove TAG response part
if (preg_match('/^\(TAG ["a-z0-9]+\)\s*/i', $data_item, $m)) {
$data_item = substr($data_item, strlen($m[0]));
}
// remove UID
$data_item = preg_replace('/^UID\s*/i', '', $data_item);
// ESEARCH parameters
while (preg_match('/^([a-z]+) ([0-9:,]+)\s*/i', $data_item, $m)) {
$param = strtoupper($m[1]);
$value = $m[2];
$this->params[$param] = $value;
$data_item = substr($data_item, strlen($m[0]));
if (in_array($param, array('COUNT', 'MIN', 'MAX'))) {
$this->meta[strtolower($param)] = (int) $value;
}
}
// @TODO: Implement compression using compressMessageSet() in __sleep() and __wakeup() ?
// @TODO: work with compressed result?!
if (isset($this->params['ALL'])) {
$data_item = implode(self::SEPARATOR_ELEMENT,
rcube_imap_generic::uncompressMessageSet($this->params['ALL']));
}
}
break;
}
unset($data[$i]);
}
$data = array_filter($data);
if (empty($data)) {
return;
}
$data = array_shift($data);
$data = trim($data);
$data = preg_replace('/[\r\n]/', '', $data);
$data = preg_replace('/\s+/', ' ', $data);
$this->raw_data = $data;
}
/**
* Checks the result from IMAP command
*
* @return bool True if the result is an error, False otherwise
*/
public function is_error()
{
return $this->raw_data === null ? true : false;
}
/**
* Checks if the result is empty
*
* @return bool True if the result is empty, False otherwise
*/
public function is_empty()
{
return empty($this->raw_data) ? true : false;
}
/**
* Returns number of elements in the result
*
* @return int Number of elements
*/
public function count()
{
if ($this->meta['count'] !== null)
return $this->meta['count'];
if (empty($this->raw_data)) {
$this->meta['count'] = 0;
$this->meta['length'] = 0;
}
else {
$this->meta['count'] = 1 + substr_count($this->raw_data, self::SEPARATOR_ELEMENT);
}
return $this->meta['count'];
}
/**
* Returns number of elements in the result.
* Alias for count() for compatibility with rcube_result_thread
*
* @return int Number of elements
*/
public function count_messages()
{
return $this->count();
}
/**
* Returns maximal message identifier in the result
*
* @return int Maximal message identifier
*/
public function max()
{
if (!isset($this->meta['max'])) {
$this->meta['max'] = (int) @max($this->get());
}
return $this->meta['max'];
}
/**
* Returns minimal message identifier in the result
*
* @return int Minimal message identifier
*/
public function min()
{
if (!isset($this->meta['min'])) {
$this->meta['min'] = (int) @min($this->get());
}
return $this->meta['min'];
}
/**
* Slices data set.
*
* @param $offset Offset (as for PHP's array_slice())
* @param $length Number of elements (as for PHP's array_slice())
*
*/
public function slice($offset, $length)
{
$data = $this->get();
$data = array_slice($data, $offset, $length);
$this->meta = array();
$this->meta['count'] = count($data);
$this->raw_data = implode(self::SEPARATOR_ELEMENT, $data);
}
/**
* Filters data set. Removes elements not listed in $ids list.
*
* @param array $ids List of IDs to remove.
*/
public function filter($ids = array())
{
$data = $this->get();
$data = array_intersect($data, $ids);
$this->meta = array();
$this->meta['count'] = count($data);
$this->raw_data = implode(self::SEPARATOR_ELEMENT, $data);
}
/**
* Reverts order of elements in the result
*/
public function revert()
{
$this->order = $this->order == 'ASC' ? 'DESC' : 'ASC';
if (empty($this->raw_data)) {
return;
}
// @TODO: maybe do this in chunks
$data = $this->get();
$data = array_reverse($data);
$this->raw_data = implode(self::SEPARATOR_ELEMENT, $data);
$this->meta['pos'] = array();
}
/**
* Check if the given message ID exists in the object
*
* @param int $msgid Message ID
* @param bool $get_index When enabled element's index will be returned.
* Elements are indexed starting with 0
*
* @return mixed False if message ID doesn't exist, True if exists or
* index of the element if $get_index=true
*/
public function exists($msgid, $get_index = false)
{
if (empty($this->raw_data)) {
return false;
}
$msgid = (int) $msgid;
$begin = implode('|', array('^', preg_quote(self::SEPARATOR_ELEMENT, '/')));
$end = implode('|', array('$', preg_quote(self::SEPARATOR_ELEMENT, '/')));
if (preg_match("/($begin)$msgid($end)/", $this->raw_data, $m,
$get_index ? PREG_OFFSET_CAPTURE : null)
) {
if ($get_index) {
$idx = 0;
if ($m[0][1]) {
$idx = 1 + substr_count($this->raw_data, self::SEPARATOR_ELEMENT, 0, $m[0][1]);
}
// cache position of this element, so we can use it in get_element()
$this->meta['pos'][$idx] = (int)$m[0][1];
return $idx;
}
return true;
}
return false;
}
/**
* Return all messages in the result.
*
* @return array List of message IDs
*/
public function get()
{
if (empty($this->raw_data)) {
return array();
}
return explode(self::SEPARATOR_ELEMENT, $this->raw_data);
}
/**
* Return all messages in the result.
*
* @return array List of message IDs
*/
public function get_compressed()
{
if (empty($this->raw_data)) {
return '';
}
return rcube_imap_generic::compressMessageSet($this->get());
}
/**
* Return result element at specified index
*
* @param int|string $index Element's index or "FIRST" or "LAST"
*
* @return int Element value
*/
public function get_element($index)
{
$count = $this->count();
if (!$count) {
return null;
}
// first element
if ($index === 0 || $index === '0' || $index === 'FIRST') {
$pos = strpos($this->raw_data, self::SEPARATOR_ELEMENT);
if ($pos === false)
$result = (int) $this->raw_data;
else
$result = (int) substr($this->raw_data, 0, $pos);
return $result;
}
// last element
if ($index === 'LAST' || $index == $count-1) {
$pos = strrpos($this->raw_data, self::SEPARATOR_ELEMENT);
if ($pos === false)
$result = (int) $this->raw_data;
else
$result = (int) substr($this->raw_data, $pos);
return $result;
}
// do we know the position of the element or the neighbour of it?
if (!empty($this->meta['pos'])) {
if (isset($this->meta['pos'][$index]))
$pos = $this->meta['pos'][$index];
else if (isset($this->meta['pos'][$index-1]))
$pos = strpos($this->raw_data, self::SEPARATOR_ELEMENT,
$this->meta['pos'][$index-1] + 1);
else if (isset($this->meta['pos'][$index+1]))
$pos = strrpos($this->raw_data, self::SEPARATOR_ELEMENT,
$this->meta['pos'][$index+1] - $this->length() - 1);
if (isset($pos) && preg_match('/([0-9]+)/', $this->raw_data, $m, null, $pos)) {
return (int) $m[1];
}
}
// Finally use less effective method
$data = explode(self::SEPARATOR_ELEMENT, $this->raw_data);
return $data[$index];
}
/**
* Returns response parameters, e.g. ESEARCH's MIN/MAX/COUNT/ALL/MODSEQ
* or internal data e.g. MAILBOX, ORDER
*
* @param string $param Parameter name
*
* @return array|string Response parameters or parameter value
*/
public function get_parameters($param=null)
{
$params = $this->params;
$params['MAILBOX'] = $this->mailbox;
$params['ORDER'] = $this->order;
if ($param !== null) {
return $params[$param];
}
return $params;
}
/**
* Returns length of internal data representation
*
* @return int Data length
*/
protected function length()
{
if (!isset($this->meta['length'])) {
$this->meta['length'] = strlen($this->raw_data);
}
return $this->meta['length'];
}
}
