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|
<?php
/*
+-----------------------------------------------------------------------+
| This file is part of the Roundcube Webmail client |
| |
| Copyright (C) 2013, The Roundcube Dev Team |
| Copyright (C) 2014, 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: |
| Execute (multi-threaded) searches in multiple IMAP folders |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
*/
/**
* Class to control search jobs on multiple IMAP folders.
*
* @package Framework
* @subpackage Storage
* @author Thomas Bruederli <roundcube@gmail.com>
*/
class rcube_imap_search
{
public $options = array();
protected $jobs = array();
protected $timelimit = 0;
protected $results;
protected $conn;
/**
* Default constructor
*/
public function __construct($options, $conn)
{
$this->options = $options;
$this->conn = $conn;
}
/**
* Invoke search request to IMAP server
*
* @param array $folders List of IMAP folders to search in
* @param string $str Search criteria
* @param string $charset Search charset
* @param string $sort_field Header field to sort by
* @param boolean $threading True if threaded listing is active
*/
public function exec($folders, $str, $charset = null, $sort_field = null, $threading=null)
{
$start = floor(microtime(true));
$results = new rcube_result_multifolder($folders);
// start a search job for every folder to search in
foreach ($folders as $folder) {
// a complete result for this folder already exists
$result = $this->results ? $this->results->get_set($folder) : false;
if ($result && !$result->incomplete) {
$results->add($result);
}
else {
$job = new rcube_imap_search_job($folder, $str, $charset, $sort_field, $threading);
$job->worker = $this;
$this->jobs[] = $job;
}
}
// execute jobs and gather results
foreach ($this->jobs as $job) {
// only run search if within the configured time limit
// TODO: try to estimate the required time based on folder size and previous search performance
if (!$this->timelimit || floor(microtime(true)) - $start < $this->timelimit) {
$job->run();
}
// add result (may have ->incomplete flag set)
$results->add($job->get_result());
}
return $results;
}
/**
* Setter for timelimt property
*/
public function set_timelimit($seconds)
{
$this->timelimit = $seconds;
}
/**
* Setter for previous (potentially incomplete) search results
*/
public function set_results($res)
{
$this->results = $res;
}
/**
* Get connection to the IMAP server
* (used for single-thread mode)
*/
public function get_imap()
{
return $this->conn;
}
}
/**
* Stackable item to run the search on a specific IMAP folder
*/
class rcube_imap_search_job /* extends Stackable */
{
private $folder;
private $search;
private $charset;
private $sort_field;
private $threading;
private $searchset;
private $result;
private $pagesize = 100;
public function __construct($folder, $str, $charset = null, $sort_field = null, $threading=false)
{
$this->folder = $folder;
$this->search = $str;
$this->charset = $charset;
$this->sort_field = $sort_field;
$this->threading = $threading;
$this->result = new rcube_result_index($folder);
$this->result->incomplete = true;
}
public function run()
{
$this->result = $this->search_index();
}
/**
* Copy of rcube_imap::search_index()
*/
protected function search_index()
{
$criteria = $this->search;
$charset = $this->charset;
$imap = $this->worker->get_imap();
if (!$imap->connected()) {
trigger_error("No IMAP connection for $this->folder", E_USER_WARNING);
if ($this->threading) {
return new rcube_result_thread($this->folder);
}
else {
return new rcube_result_index($this->folder);
}
}
if ($this->worker->options['skip_deleted'] && !preg_match('/UNDELETED/', $criteria)) {
$criteria = 'UNDELETED '.$criteria;
}
// unset CHARSET if criteria string is ASCII, this way
// SEARCH won't be re-sent after "unsupported charset" response
if ($charset && $charset != 'US-ASCII' && is_ascii($criteria)) {
$charset = 'US-ASCII';
}
if ($this->threading) {
$threads = $imap->thread($this->folder, $this->threading, $criteria, true, $charset);
// Error, try with US-ASCII (RFC5256: SORT/THREAD must support US-ASCII and UTF-8,
// but I've seen that Courier doesn't support UTF-8)
if ($threads->is_error() && $charset && $charset != 'US-ASCII') {
$threads = $imap->thread($this->folder, $this->threading,
rcube_imap::convert_criteria($criteria, $charset), true, 'US-ASCII');
}
return $threads;
}
if ($this->sort_field) {
$messages = $imap->sort($this->folder, $this->sort_field, $criteria, true, $charset);
// Error, try with US-ASCII (RFC5256: SORT/THREAD must support US-ASCII and UTF-8,
// but I've seen Courier with disabled UTF-8 support)
if ($messages->is_error() && $charset && $charset != 'US-ASCII') {
$messages = $imap->sort($this->folder, $this->sort_field,
rcube_imap::convert_criteria($criteria, $charset), true, 'US-ASCII');
}
}
if (!$messages || $messages->is_error()) {
$messages = $imap->search($this->folder,
($charset && $charset != 'US-ASCII' ? "CHARSET $charset " : '') . $criteria, true);
// Error, try with US-ASCII (some servers may support only US-ASCII)
if ($messages->is_error() && $charset && $charset != 'US-ASCII') {
$messages = $imap->search($this->folder,
rcube_imap::convert_criteria($criteria, $charset), true);
}
}
return $messages;
}
public function get_search_set()
{
return array(
$this->search,
$this->result,
$this->charset,
$this->sort_field,
$this->threading,
);
}
public function get_result()
{
return $this->result;
}
}
|
