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<?php
/*
* Gallery - a web based photo album viewer and editor
* Copyright (C) 2000-2007 Bharat Mediratta
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
/**
* This controller will handle changing the order of items in an album.
* @package GalleryCore
* @subpackage UserInterface
* @author Bharat Mediratta <bharat@menalto.com>
* @version $Revision: 15513 $
*/
class ItemReorderController extends GalleryController {
/**
* @see GalleryController::handleRequest
*/
function handleRequest($form) {
global $gallery;
$itemId = GalleryUtilities::getRequestVariables('itemId');
/* Check permissions */
$ret = GalleryCoreApi::assertHasItemPermission($itemId, 'core.edit');
if ($ret) {
return array($ret, null);
}
$status = $error = array();
if (isset($form['action']['reorder'])) {
/* Verify that we've got what we need */
if (empty($form['selectedId'])) {
$error[] = 'form[error][selectedId][missing]';
}
if (empty($form['targetId'])) {
$error[] = 'form[error][targetId][missing]';
}
$before = 0;
if (empty($form['placement']) || $form['placement'] == 'before') {
$before = 1;
}
/*
* Make sure that the selectedId and targetId are children of the album
*/
if (empty($error)) {
$selectedId = $form['selectedId'];
$targetId = $form['targetId'];
list ($ret, $entities) =
GalleryCoreApi::loadEntitiesById(array($selectedId, $targetId));
if ($ret) {
return array($ret, null);
}
if ($entities[0]->getParentId() != $itemId ||
$entities[1]->getParentId() != $itemId) {
return array(GalleryCoreApi::error(ERROR_PERMISSION_DENIED), null);
}
}
if (empty($error)) {
$loopCount = 0;
while (true) {
/*
* Get the current and target order weights (have to do
* this after every rebalance, too)
*/
list ($ret, $orderWeights) =
GalleryCoreApi::fetchItemOrderWeights(array($selectedId, $targetId));
if ($ret) {
return array($ret, null);
}
list ($ret, $next) = GalleryCoreApi::fetchNextItemWeight($targetId,
$before ? LOWER_WEIGHT : HIGHER_WEIGHT);
if ($ret) {
return array($ret, null);
}
if (isset($next)) {
/* Floor rounds down, so separate the sign and the magnitude */
$delta = (int)(($next - $orderWeights[$targetId]) / 2);
} else {
/*
* We couldn't get a weight, which means that the
* target is at the edge. So go beyond the edge
*/
$delta = $before ? -1000 : 1000;
}
if (abs($delta) > 0) {
break;
}
if ($loopCount++ > 0) {
/*
* If we have to rebalance more than once then something went wrong!
*/
return array(GalleryCoreApi::error(ERROR_UNKNOWN), null);
}
/* A delta of 0 means that we don't have room, so rebalance */
$ret = GalleryCoreApi::rebalanceChildOrderWeights($itemId);
if ($ret) {
return array($ret, null);
}
}
$newWeight = $orderWeights[$targetId] + $delta;
$ret = GalleryCoreApi::setItemOrderWeight($selectedId, $newWeight);
if ($ret) {
return array($ret, null);
}
$event = GalleryCoreApi::newEvent('Gallery::ItemOrder');
$event->setData($itemId);
list ($ret) = GalleryCoreApi::postEvent($event);
if ($ret) {
return array($ret, null);
}
/* Redirect back to the same page so that we can do more reordering */
$redirect['view'] = 'core.ItemAdmin';
$redirect['subView'] = 'core.ItemReorder';
$redirect['itemId'] = $itemId;
$status['saved'] = 1;
}
} else if (isset($form['action']['cancel'])) {
$redirect['return'] = true;
}
if (!empty($redirect)) {
$results['redirect'] = $redirect;
} else {
$results['delegate']['view'] = 'core.ItemAdmin';
$results['delegate']['subView'] = 'core.ItemReorder';
}
$results['status'] = $status;
$results['error'] = $error;
return array(null, $results);
}
}
/**
* This view will prompt for how to change the order of items in the album
*/
class ItemReorderView extends GalleryView {
/**
* @see GalleryView::loadTemplate
*/
function loadTemplate(&$template, &$form) {
global $gallery;
/* itemId is the album where we want to move items from */
$itemId = GalleryUtilities::getRequestVariables('itemId');
if ($form['formName'] == 'ItemReorder') {
/* No validation at the moment */
} else {
/* First time around, load the form with item data */
$form['formName'] = 'ItemReorder';
}
list ($ret, $item) = GalleryCoreApi::loadEntitiesById($itemId);
if ($ret) {
return array($ret, null);
}
$show = array();
$ItemReorder = array();
$orderBy = $item->getOrderBy();
if (empty($orderBy)) {
list ($ret, $orderBy) =
GalleryCoreApi::getPluginParameter('module', 'core', 'default.orderBy');
if ($ret) {
return array($ret, null);
}
}
if ($orderBy != 'orderWeight') {
$show['automaticOrderMessage'] = 1;
} else {
/* Get all peers that we can see */
list ($ret, $peerIds) = GalleryCoreApi::fetchChildItemIds($item);
if ($ret) {
return array($ret, null);
}
/* Load all the peers */
list ($ret, $peerItems) = GalleryCoreApi::loadEntitiesById($peerIds);
if ($ret) {
return array($ret, null);
}
/* Build our peers table */
$peers = array();
foreach ($peerItems as $peerItem) {
$peers[$peerItem->getId()] = (array)$peerItem;
if (GalleryUtilities::isA($peerItem, 'GalleryAlbumItem')) {
$peerTypes['album'][$peerItem->getId()] = 1;
} else {
$peerTypes['data'][$peerItem->getId()] = 1;
}
$peers[$peerItem->getId()]['selected'] =
isset($form['selectedIds'][$peerItem->getId()]);
}
$ItemReorder['peers'] = $peers;
$ItemReorder['peerTypes'] = $peerTypes;
}
$ItemReorder['show'] = $show;
$template->setVariable('ItemReorder', $ItemReorder);
$template->setVariable('controller', 'core.ItemReorder');
return array(null, array('body' => 'modules/core/templates/ItemReorder.tpl'));
}
/**
* @see GalleryView::getViewDescription
*/
function getViewDescription() {
list ($ret, $core) = GalleryCoreApi::loadPlugin('module', 'core');
if ($ret) {
return array($ret, null);
}
return array(null, $core->translate('reorder items'));
}
}
?>
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