<?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: 1087 $
 */
class TagsCallbackView extends GalleryView {

    /**
     * @see GalleryView::isImmediate
     */
    function isImmediate() {
	return true;
    }

    /**
     * @see GalleryView::isControllerLike
     */
    function isControllerLike() {
	return true;
    }

    /**
     * @see GalleryView::renderImmediate
     */
    function renderImmediate($status, $error) {

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

	$tagName = trim($tagName);

	if (!headers_sent()) {
	    header('Content-type: text/plain; charset=UTF-8');
	}

	switch ($command) {
	    case 'addTag':
		if (!empty($tagName)) {
		    $ret = TagsHelper::assignTag($itemId, $tagName);
		    if ($ret) {
			return $ret;
		    }
		}
		break;

	    case 'delTag':
		if (!empty($tagName)) {
		    $ret = TagsHelper::unassignTag($itemId, $tagName);
		    if ($ret) {
			return $ret;
		    }
		}
		break;

	    case 'newTag':
		if (!empty($tagName)) {
		    list ($ret, $tagList) = TagsHelper::splitTags($tagName);
		    if ($ret) {
			return $ret;
		    }
		    foreach ($tagList as $tag) {
			$ret = TagsHelper::addNewTag($tag);
			if ($ret) {
			    return $ret;
			}
			$ret = TagsHelper::assignTag($itemId, $tag);
			if ($ret) {
			    return $ret;
			}
		    }
		}
		break;

	    case 'getTagList':
		$prefix = GalleryUtilities::getRequestVariables('prefix');
		list ($ret, $tagList) = TagsHelper::getTaglist($prefix);
		if (!$ret) {
		    /*
		     * AutoComplete's handling of HTML entities has been fixed in r16352. Calling
		     * unsanitize() doesn't do the same but is a workaround for older G2 versions.
		     */
		    if (!GalleryUtilities::isCompatibleWithApi(
			    array(7, 29), GalleryCoreApi::getApiVersion())) {
			/** @todo Remove this check / call on the next major API change. */
			GalleryUtilities::unsanitizeInputValues($tagList, false);
		    }
		    print implode("\n", $tagList);
		}
		/* @todo Log Error when debug is on */
		break;
	    default:
		/* @note Not sure if this should a debug log instead */
		return GalleryCoreApi::error(ERROR_BAD_PARAMETER);
	}

	return null;
    }
}
?>