Files.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2015 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.impl.util;
 
import com.google.gson.Gson;
import java.io.File;
import java.io.FilenameFilter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.turro.string.Strings;
import org.turro.elephant.context.ElephantContext;
import org.turro.elephant.context.IConstructor;
 
public class Files {
  
  public static String getJsonFiles(final String path, final String pattern) {
    return new Gson().toJson(getFiles(path, pattern));
  }
 
  public static String getJsonSortedFiles(final String path, final String pattern) {
    List<String> files = getFiles(path, pattern);
    Collections.sort(files);
    return new Gson().toJson(files);
  }
 
  public static String getJsonShuffledFiles(final String path, final String pattern) {
    List<String> files = getFiles(path, pattern);
    Collections.shuffle(files);
    return new Gson().toJson(files);
  }
 
  public static List<String> getFiles(final String path, final String pattern) {
    ArrayList<String> files = new ArrayList<>();
    File folder = new File(ElephantContext.getRealPath(path));
    if(folder.exists()) {
      for(File file : folder.listFiles(new FilenameFilter() {
        @Override
        public boolean accept(File dir, String name) {
          return name.matches(Strings.convertToRegEx(pattern));
        }
      })) {
        if(file.isFile()) {
          files.add(ElephantContext.getRootWebPath() + path + "/" + file.getName());
        }
      }
    }
    return files;
  }
  
  public static File file(IConstructor constructor, String file) {
    return file(file.replaceAll("\\*", constructor.getRenderingContext().getPath() + "/_internal/repository"));
  }
 
  public static File file(String file) {
    file = ElephantContext.getRealPath(file);
    return new File(file);
  }
 
  public static boolean exists(String path) {
    path = ElephantContext.getRealPath(path);
    return path == null ? false : new File(path).exists();
  }
 
  public static String toExisting(String path) {
    while(!exists(path)) {
      int p = path.lastIndexOf("/");
      if(p > 0) {
        path = path.substring(0, p);
      } else {
        break;
      }
    }
    return path;
  }
 
  private Files() {
  }
  
}