<?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.
 */

GalleryCoreApi::requireOnce('modules/tags/classes/TagsHelper.class');

/**
 * This controller will handle assigning tags to items
 *
 * @package Tags
 * @subpackage UserInterface
 * @author Eric H Daniel <ehdaniel@gmail.com>
 * @version $Revision: 1727 $
 */
class TagsItemEditController extends GalleryController {

    /**
     * @see GalleryController::handleRequest
     */
    function handleRequest($form) {
	global $gallery;

	list ($itemId, $tagMode) = GalleryUtilities::getRequestVariables('itemId', 'tagMode');

	$ret = GalleryCoreApi::assertHasItemPermission($itemId, 'tags.edit');
	if ($ret) {
	    return array($ret, null);
	}

	$status = $error = array();

	list ($ret, $item) = GalleryCoreApi::loadEntitiesById($itemId);
	if ($ret) {
	    return array($ret, null);
	}

	if (isset($form['action']['apply'])) {

	    if ($item->getCanContainChildren()) {
		/* Figure out what to extend it to */
		/** todo move this to the callback and add permission check on the first 2 functions */
		$items = array();
		if (!empty($form['AlbumItems']) && !empty($form['AllAlbumItems'])) {
		    list ($ret, $tmpItems) = GalleryCoreApi::fetchChildDataItemIds($item);
		    if ($ret) {
			return array($ret, null);
		    }
		    $items = array_merge($items, $tmpItems);
		}
		if (!empty($form['AlbumItems']) && !empty($form['AllAlbumAlbums'])) {
		    list ($ret, $tmpItems) = GalleryCoreApi::fetchChildAlbumItemIds($item);
		    if ($ret) {
			return array($ret, null);
		    }
		    $items = array_merge($items, $tmpItems);
		}
		if (!empty($form['SubAlbumItems']) && !empty($form['AllSubAlbumItems'])) {
		    list ($ret, $tmpItems) = GalleryCoreApi::fetchDescendentItemIds($item, null,
			null, 'tags.edit');
		    if ($ret) {
			return array($ret, null);
		    }
		    $items = array_merge($items, $tmpItems);
		}
		if (!empty($form['SubAlbumItems']) && !empty($form['AllSubAlbumAlbums'])) {
		    list ($ret, $tmpItems) = GalleryCoreApi::fetchDescendentAlbumItemIds($item,
			null, null, 'tags.edit');
		    if ($ret) {
			return array($ret, null);
		    }
		    $items = array_merge($items, $tmpItems);
		}

		$templateAdapter =& $gallery->getTemplateAdapter();
		$templateAdapter->registerTrailerCallback(array($this, 'runApplyTags'),
		    array($items, $itemId));
		$results['delegate']['view'] = 'core.ProgressBar';

	    } else {
		$results['delegate']['view'] = 'tags.TagsItemEdit';
		$results['delegate']['itemId'] = $itemId;
		$error[] = '$form[error][noextension]';
	    }
	}

	$results['status'] = $status;
	$results['error'] = $error;
	return array(null, $results);
    }

    function runApplyTags($items, $itemId) {
	global $gallery;
	$storage =& $gallery->getStorage();
	$templateAdapter =& $gallery->getTemplateAdapter();

	list ($ret, $module) = GalleryCoreApi::loadPlugin('module', 'tags');
	if ($ret) {
	    return $ret;
	}

	list ($ret, $tags) = TagsHelper::getTagsByItemId($itemId);
	if ($ret) {
	    return $ret;
	}

	$heading = $module->translate('Applying Album Tags to SubItems');
	$templateAdapter->updateProgressBar($heading, $module->translate('Preparing...'), 0);

	$total = count($items);

	foreach ($items as $key => $id) {
	    foreach ($tags as $rawTagName => $tagName) {
		$message = $module->translate(array('text' => 'Processing item %d of %d',
		    'arg1' => $key + 1, 'arg2' => $total));
		$templateAdapter->updateProgressBar($heading, $message, ($key + 1) / $total);
		$ret = TagsHelper::assignTag($id, $tagName);
		if ($ret) {
		    return $ret;
		}
	    }
	}
	$redirect = array('view' => 'tags.TagsItemEdit', 'itemId' => $itemId);

	$urlGenerator =& $gallery->getUrlGenerator();
	$templateAdapter->completeProgressBar($urlGenerator->generateUrl($redirect));

	return null;
    }

}

class TagsItemEditView extends GalleryView {

    /**
     * @see GalleryView::loadTemplate
     */
    function loadTemplate(&$template, &$form) {
	global $gallery;

	list ($itemId, $tagMode) = GalleryUtilities::getRequestVariables('itemId',
	    'tagMode');

	$ret = GalleryCoreApi::assertHasItemPermission($itemId, 'tags.edit');
	if ($ret) {
	    return array($ret, null);
	}

	list ($ret, $item) = GalleryCoreApi::loadEntitiesById($itemId);
	if ($ret) {
	    return array($ret, null);
	}

	/** @todo Interact with the EXIF factory instead */
	$exifModuleActive = false;
	list ($ret, $exifModule) = GalleryCoreApi::loadPlugin('module', 'exif');
	if ($ret) {
	    return array($ret, null);
	}

	if (!empty($exifModule)){
	    list ($ret, $exifModuleActive) = $exifModule->isActive();
	    if ($ret) {
		return array($ret, null);
	    }
	}

	$tagExifInfo = array();
	if ($exifModuleActive) {
	    /* Grab the list of fields in 'details' */
	    list ($ret, $path) = $item->fetchPath();
	    GalleryCoreApi::requireOnce('modules/exif/classes/ExifHelper.class');
	    list ($ret, $exifData) = ExifHelper::getExifData($path, EXIF_DETAILED);
	    if ($ret) {
		return array($ret, null);
	    }
	    $tagExifInfo = $exifData;
	}

	if (!$exifModuleActive || empty($tagExifInfo)) {
	    /* No EXIF ensure we don't go to that tab by 'mistake' */
	    $tagMode = ($tagMode == 'Exif') ? 'Existing' : $tagMode;
	}

	$tagItem = GalleryUtilities::isA($item, 'GalleryAlbumItem') ? 'Album' : 'Other';
	$tagMode = ($tagMode == '') ? 'Existing' : $tagMode;

	if ($form['formName'] != 'TagsItemEdit') {
	    $form['formName'] = 'TagsItemEdit';
	    $form['itemId'] = $itemId;
	}

	list ($ret, $tagList) = TagsHelper::getTagListWithTagCount();
	if ($ret) {
	    return array($ret, null);
	}

	list ($ret, $thisItemTagList) = TagsHelper::getTagsByItemId($itemId);
	if ($ret) {
	    return array($ret, null);
	}
	$tempArray = array();
	foreach ($thisItemTagList as $tagId => $tagName) {
	    $tempArray[$tagName] = $tagId;
	}
	$thisItemTagList = $tempArray;

	list ($ret, $limitPop) = GalleryCoreApi::getPluginParameter('module', 'tags',
	    'LimitPopularTag');
	if ($ret) {
	    return array($ret, null);
	}
	if ($limitPop) {
	    list ($ret, $popLimit) = GalleryCoreApi::getPluginParameter('module', 'tags',
		'PopularTaglimit');
	    if ($ret) {
		return array($ret, null);
	    }
	} else {
	    $popLimit = count($tagList);
	}

	$template->javascript('lib/yui/yahoo-min.js');
	$template->javascript('lib/yui/event-min.js');
	$template->javascript('lib/yui/connection-min.js');
	$template->javascript('modules/tags/js/Tags.js');

	$template->setVariable('controller', 'tags.TagsItemEdit');
	$template->setVariable('tagList', $thisItemTagList);
	$template->setVariable('popularTags', $tagList);
	$template->setVariable('tagItem', $tagItem);
	$template->setVariable('tagMode', $tagMode);
	$template->setVariable('tagExifInfo', $tagExifInfo);
	$template->setVariable('itemId', $itemId);
	$template->setVariable('popLimit', $popLimit);

	return array(null, array('body' => 'modules/tags/templates/TagsItemEdit.tpl'));
    }
}
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