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218 lines
No EOL
8.6 KiB
PHP
218 lines
No EOL
8.6 KiB
PHP
<?php
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/***********************************************
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* File : exportchangesdiff.php
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* Project : Z-Push
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* Descr : IExportChanges implementation using
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* the differential engine
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*
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* Created : 02.01.2012
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*
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* Copyright 2007 - 2013 Zarafa Deutschland GmbH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation with the following additional
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* term according to sec. 7:
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*
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* According to sec. 7 of the GNU Affero General Public License, version 3,
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* the terms of the AGPL are supplemented with the following terms:
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*
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* "Zarafa" is a registered trademark of Zarafa B.V.
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* "Z-Push" is a registered trademark of Zarafa Deutschland GmbH
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* The licensing of the Program under the AGPL does not imply a trademark license.
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* Therefore any rights, title and interest in our trademarks remain entirely with us.
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*
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* However, if you propagate an unmodified version of the Program you are
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* allowed to use the term "Z-Push" to indicate that you distribute the Program.
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* Furthermore you may use our trademarks where it is necessary to indicate
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* the intended purpose of a product or service provided you use it in accordance
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* with honest practices in industrial or commercial matters.
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* If you want to propagate modified versions of the Program under the name "Z-Push",
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* you may only do so if you have a written permission by Zarafa Deutschland GmbH
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* (to acquire a permission please contact Zarafa at trademark@zarafa.com).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Consult LICENSE file for details
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************************************************/
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class ExportChangesDiff extends DiffState implements IExportChanges{
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private $importer;
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private $folderid;
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private $changes;
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private $step;
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/**
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* Constructor
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*
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* @param object $backend
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* @param string $folderid
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*
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* @access public
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* @throws StatusException
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*/
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public function ExportChangesDiff($backend, $folderid) {
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$this->backend = $backend;
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$this->folderid = $folderid;
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}
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/**
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* Sets the importer the exporter will sent it's changes to
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* and initializes the Exporter
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*
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* @param object &$importer Implementation of IImportChanges
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*
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* @access public
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* @return boolean
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* @throws StatusException
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*/
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public function InitializeExporter(&$importer) {
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$this->changes = array();
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$this->step = 0;
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$this->importer = $importer;
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if($this->folderid) {
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// Get the changes since the last sync
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if(!isset($this->syncstate) || !$this->syncstate)
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$this->syncstate = array();
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ZLog::Write(LOGLEVEL_DEBUG,sprintf("ExportChangesDiff->InitializeExporter(): Initializing message diff engine. '%d' messages in state", count($this->syncstate)));
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//do nothing if it is a dummy folder
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if ($this->folderid != SYNC_FOLDER_TYPE_DUMMY) {
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// Get our lists - syncstate (old) and msglist (new)
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$msglist = $this->backend->GetMessageList($this->folderid, $this->cutoffdate);
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// if the folder was deleted, no information is available anymore. A hierarchysync should be executed
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if($msglist === false)
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throw new StatusException("ExportChangesDiff->InitializeExporter(): Error, no message list available from the backend", SYNC_STATUS_FOLDERHIERARCHYCHANGED, null, LOGLEVEL_INFO);
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$this->changes = $this->getDiffTo($msglist);
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}
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}
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else {
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ZLog::Write(LOGLEVEL_DEBUG, "Initializing folder diff engine");
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ZLog::Write(LOGLEVEL_DEBUG, "ExportChangesDiff->InitializeExporter(): Initializing folder diff engine");
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$folderlist = $this->backend->GetFolderList();
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if($folderlist === false)
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throw new StatusException("ExportChangesDiff->InitializeExporter(): error, no folders available from the backend", SYNC_FSSTATUS_CODEUNKNOWN, null, LOGLEVEL_WARN);
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if(!isset($this->syncstate) || !$this->syncstate)
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$this->syncstate = array();
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$this->changes = $this->getDiffTo($folderlist);
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}
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ZLog::Write(LOGLEVEL_INFO, sprintf("ExportChangesDiff->InitializeExporter(): Found '%d' changes", count($this->changes) ));
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}
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/**
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* Returns the amount of changes to be exported
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*
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* @access public
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* @return int
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*/
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public function GetChangeCount() {
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return count($this->changes);
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}
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/**
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* Synchronizes a change
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*
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* @access public
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* @return array
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*/
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public function Synchronize() {
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$progress = array();
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// Get one of our stored changes and send it to the importer, store the new state if
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// it succeeds
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if($this->folderid == false) {
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if($this->step < count($this->changes)) {
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$change = $this->changes[$this->step];
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switch($change["type"]) {
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case "change":
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$folder = $this->backend->GetFolder($change["id"]);
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$stat = $this->backend->StatFolder($change["id"]);
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if(!$folder)
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return;
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if($this->flags & BACKEND_DISCARD_DATA || $this->importer->ImportFolderChange($folder))
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$this->updateState("change", $stat);
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break;
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case "delete":
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if($this->flags & BACKEND_DISCARD_DATA || $this->importer->ImportFolderDeletion($change["id"]))
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$this->updateState("delete", $change);
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break;
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}
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$this->step++;
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$progress = array();
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$progress["steps"] = count($this->changes);
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$progress["progress"] = $this->step;
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return $progress;
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} else {
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return false;
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}
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}
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else {
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if($this->step < count($this->changes)) {
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$change = $this->changes[$this->step];
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switch($change["type"]) {
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case "change":
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// Note: because 'parseMessage' and 'statMessage' are two seperate
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// calls, we have a chance that the message has changed between both
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// calls. This may cause our algorithm to 'double see' changes.
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$stat = $this->backend->StatMessage($this->folderid, $change["id"]);
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$message = $this->backend->GetMessage($this->folderid, $change["id"], $this->contentparameters);
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// copy the flag to the message
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$message->flags = (isset($change["flags"])) ? $change["flags"] : 0;
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if($stat && $message) {
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if($this->flags & BACKEND_DISCARD_DATA || $this->importer->ImportMessageChange($change["id"], $message) == true)
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$this->updateState("change", $stat);
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}
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break;
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case "delete":
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if($this->flags & BACKEND_DISCARD_DATA || $this->importer->ImportMessageDeletion($change["id"]) == true)
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$this->updateState("delete", $change);
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break;
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case "flags":
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if($this->flags & BACKEND_DISCARD_DATA || $this->importer->ImportMessageReadFlag($change["id"], $change["flags"]) == true)
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$this->updateState("flags", $change);
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break;
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case "move":
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if($this->flags & BACKEND_DISCARD_DATA || $this->importer->ImportMessageMove($change["id"], $change["parent"]) == true)
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$this->updateState("move", $change);
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break;
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}
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$this->step++;
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$progress = array();
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$progress["steps"] = count($this->changes);
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$progress["progress"] = $this->step;
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return $progress;
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} else {
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return false;
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}
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}
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}
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}
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?>
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