ImageMailTracker.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2019 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * 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.turro.mail.tracker;
 
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.turro.string.Strings;
import org.turro.collections.KeyValueMap;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.context.IConstructor;
import org.turro.elephant.db.ElephantPU;
import org.turro.elephant.direct.DirectContent;
import org.turro.elephant.direct.DirectContents;
import org.turro.elephant.direct.IDirectContent;
import org.turro.elephant.entities.db.MailTracker;
import org.turro.plugin.contacts.IContact;
 
@DirectContent(identifier="img-tk")
public class ImageMailTracker implements IDirectContent {
 
  public static String createURL(IConstructor constructor, String image, String entityPath, IContact contact) 
          throws UnsupportedEncodingException, Exception {
    if(contact != null && contact.isWebUser()) {
      HashMap<String, String> values = new HashMap<>();
      values.put("idcontact", contact.getId());
      values.put("entityPath", entityPath);
      values.put("image", image);
      return DirectContents.doCreateParameter(getIdentifier(), getIdentifier(), values);
    } else {
      return "";
    }
  }
 
  public static String getIdentifier() {
    return ImageMailTracker.class.getAnnotation(DirectContent.class).identifier();
  }
 
  @Override
  public boolean itsMe(String id) {
    return getIdentifier().equals(id);
  }
 
  @Override
  public boolean myTurn(HttpServletRequest request) {
    return DirectContents.isYourTurn(request, getIdentifier());
  }
 
  @Override
  public void execute(ServletContext context, HttpServletRequest request, HttpServletResponse response) {
    try {
      IConstructor constructor = ElephantContext.getConstructor(request, response);
      String imgtk = constructor.getParameter(getIdentifier(), false);
      if(!Strings.isBlank(imgtk)) {
        KeyValueMap map = new KeyValueMap(ElephantContext.decrypt(imgtk));
        response.setContentType("image/png");
        File f = new File(ElephantContext.getRealPath(map.get("image")));
        BufferedImage bi = ImageIO.read(f);
        OutputStream out = response.getOutputStream();
        ImageIO.write(bi, "png", out);  
        out.close();
        MailTracker mt = new MailTracker();
        mt.setEntityPath(map.get("entityPath"));
        mt.setIdContact(map.get("idcontact"));
        mt.setReadDate(new Date());
        new ElephantPU().saveObject(mt);
      }
    } catch (Exception ex) {
      Logger.getLogger(ImageMailTracker.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
    }
  }
 
}