SocialNet.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2018 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.elephant.web;
 
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.turro.string.Strings;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.impl.repository.Repository;
import org.turro.elephant.impl.repository.RepositoryFile;
import org.turro.html.HtmlContent;
 
public class SocialNet {
 
  private final String url, title, description;
  private SocialImage image;
  
  public SocialNet(String url, String title, String description, Collection<RepositoryFile> files) {
    this.url = url;
    this.title = title;
    this.description = escape(description);
    Repository repository = ElContextMap.getRoot().getRepository();
    files.addAll(repository.getRepositoryFiles("*_def_social.png,*_def_social.jpg"));
    SocialImageMap.initialize(this, files);
  }
 
  public boolean hasImage() {
    return image != null && !image.isEmpty();
  }
 
  public boolean hasLarge() {
    return hasImage() && image.isLarge();
  }
  
  public void setImage(SocialImage image) {
    this.image = image;
  }
 
  public String getUrl() {
    return url;
  }
  
  public List<String> getMetas() {
    ArrayList<String> metas = new ArrayList<>();
    
    // Twitter card
    if(!hasLarge()) {
      metas.add("<meta name=\"twitter:card\" content=\"summary\">");
    } else {
      metas.add("<meta name=\"twitter:card\" content=\"summary_large_image\">"); // Twitter card
    }
    metas.add("<meta name=\"twitter:title\" content=\"" + escape(title) + "\"/>");
    if(!Strings.isBlank(description)) {
      metas.add("<meta name=\"twitter:description\" content=\"" + Strings.truncateAndWarn(description, 250) + "\"/>");
    }
    if(hasImage()) {
      metas.add("<meta name=\"twitter:image\" content=\"" + ElephantContext.getServerBase("http") + image.getUrl() + "\"/>");
    }
 
    // OpenGraph
    metas.add("<meta property=\"og:site_name\" content=\"" + ElephantContext.getSiteName() + "\"/>");
    metas.add("<meta property=\"og:type\" content=\"website\"/>");
    metas.add("<meta property=\"og:url\" content=\"" + ElephantContext.getServerBase("http") + url + "\"/>");
    metas.add("<meta property=\"og:title\" content=\"" + escape(title) + "\"/>");
    if(!Strings.isBlank(description)) {
      metas.add("<meta property=\"og:description\" content=\"" + Strings.truncateAndWarn(description, 250) + "\"/>");
    }
    if(hasImage()) {
      metas.add("<meta property=\"og:image\" content=\"" + ElephantContext.getServerBase("http") + image.getUrl() + "\"/>");
    }
    
    return metas;
  }
  
  private String escape(String text) {
    if(!Strings.isBlank(text)) {
      text = HtmlContent.text(text);
      text = text.replaceAll("\"", "'");
      text = text.replaceAll("\n", " ");
    }
    return text;
  }
  
}