package fr.ifremer.tutti.service;
   
   /*
    * #%L
    * Tutti :: Service
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2012 - 2014 Ifremer
   * %%
   * 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 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 General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/gpl-3.0.html>.
   * #L%
   */
  
  import freemarker.cache.ClassTemplateLoader;
  import freemarker.ext.beans.BeansWrapper;
  import freemarker.template.Configuration;
  import freemarker.template.Template;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.nuiton.jaxx.application.ApplicationTechnicalException;
  import org.xhtmlrenderer.pdf.ITextRenderer;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.OutputStream;
  import java.io.StringWriter;
  import java.io.Writer;
  import java.util.Locale;
  
  import static org.nuiton.i18n.I18n.t;
  
  /**
   * Created on 11/22/14.
   *
   * @author Tony Chemit - chemit@codelutin.com
   * @since 3.10
   */
  public class PdfGeneratorService extends AbstractTuttiService {
  
      /** Logger. */
      private static final Log log = LogFactory.getLog(PdfGeneratorService.class);
  
      protected Configuration freemarkerConfiguration;
  
      @Override
      public void setServiceContext(TuttiServiceContext context) {
          super.setServiceContext(context);
  
          freemarkerConfiguration = new Configuration();
  
          // needed to overwrite "Defaults to default system encoding."
          // fix encoding issue on some systems
          freemarkerConfiguration.setEncoding(Locale.getDefault(), "UTF-8");
  
          // specific template loader to get template from jars (classpath)
          ClassTemplateLoader templateLoader = new ClassTemplateLoader(getClass(), "/ftl");
          freemarkerConfiguration.setTemplateLoader(templateLoader);
  
          // pour les maps dans les template (entre autre)
          freemarkerConfiguration.setObjectWrapper(new BeansWrapper());
  
      }
  
      public void generatePdf(File targetFile, Locale locale, String templateName, Object model) {
  
          if (log.isInfoEnabled()) {
              log.info("Will generate pdf from template " + templateName + " at " + targetFile);
          }
          try {
  
              // Get freemarker template
              Template mapTemplate = freemarkerConfiguration.getTemplate(templateName, locale);
  
              Writer out = new StringWriter();
              mapTemplate.process(model, out);
  
              out.flush();
  
              // render template output as pdf
              try (OutputStream os = new FileOutputStream(targetFile)) {
  
                  ITextRenderer renderer = new ITextRenderer();
                  renderer.setDocumentFromString(out.toString());
                  renderer.layout();
                  renderer.createPDF(os);
  
                 os.close();
             }
 
         } catch (Exception ex) {
             throw new ApplicationTechnicalException(t("tutti.service.exportPdf.error", targetFile), ex);
         }
     }
 }