UploadPhotoFormHandler.java

/*
 * Copyright (c) 2006-2009 by Dirk Riehle, http://dirkriehle.com
 *
 * This file is part of the Wahlzeit photo rating application.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 */

package org.wahlzeit.handlers;

import com.google.appengine.api.images.Image;
import org.wahlzeit.agents.AsyncTaskExecutor;
import org.wahlzeit.model.AccessRights;
import org.wahlzeit.model.ModelConfig;
import org.wahlzeit.model.Photo;
import org.wahlzeit.model.PhotoManager;
import org.wahlzeit.model.Tags;
import org.wahlzeit.model.User;
import org.wahlzeit.model.UserSession;
import org.wahlzeit.services.LogBuilder;
import org.wahlzeit.utils.StringUtil;
import org.wahlzeit.webparts.WebPart;

import java.util.Map;
import java.util.logging.Logger;

/**
 * A handler class for a specific web form.
 */
public class UploadPhotoFormHandler extends AbstractWebFormHandler {

	private static Logger log = Logger.getLogger(UploadPhotoFormHandler.class.getName());

	/**
	 *
	 */
	public UploadPhotoFormHandler() {
		initialize(PartUtil.UPLOAD_PHOTO_FORM_FILE, AccessRights.USER);
	}

	/**
	 *
	 */
	protected void doMakeWebPart(UserSession us, WebPart part) {
		Map<String, Object> args = us.getSavedArgs();
		part.addStringFromArgs(args, UserSession.MESSAGE);

		part.maskAndAddStringFromArgs(args, Photo.TAGS);
	}

	/**
	 *
	 */
	protected String doHandlePost(UserSession us, Map args) {
		String tags = us.getAndSaveAsString(args, Photo.TAGS);

		ModelConfig config = us.getClient().getLanguageConfiguration();
		if (!StringUtil.isLegalTagsString(tags)) {
			us.setMessage(config.getInputIsInvalid());
			return PartUtil.UPLOAD_PHOTO_PAGE_NAME;
		}

		try {
			PhotoManager pm = PhotoManager.getInstance();
			String fileName = us.getAsString(args, "fileName");
			User user = (User) us.getClient();
			Image uploadedImage = user.getUploadedImage();
			Photo photo = pm.createPhoto(fileName, uploadedImage);

			user.addPhoto(photo);

			photo.setTags(new Tags(tags));

			log.config(LogBuilder.createUserMessage().
					addAction("Upload Photo").
					addParameter("Photo", photo.getId().asString()).
					addParameter("tags", photo.getTags().asString()).toString());

			us.setTwoLineMessage(config.getPhotoUploadSucceeded(), config.getKeepGoing());
			log.config(LogBuilder.createSystemMessage().
					addAction("Calling async task to save Photo").
					addParameter("ID", photo.getId().asString()).toString());

			AsyncTaskExecutor.savePhotoAsync(photo.getId().asString());
		} catch (Exception ex) {
			log.warning(LogBuilder.createSystemMessage().addException("uploading photo failed", ex).toString());
			us.setMessage(config.getPhotoUploadFailed());
		}

		return PartUtil.UPLOAD_PHOTO_PAGE_NAME;
	}
}