/*
 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
 * Copyright (C) $$Year-Rel$$ The Jalview Authors
 * 
 * This file is part of Jalview.
 * 
 * Jalview 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.
 *  
 * Jalview 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 Jalview.  If not, see <http://www.gnu.org/licenses/>.
 * The Jalview Authors are detailed in the 'AUTHORS' file.
 */
package jalview.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Properties;

public class LaunchUtils
{

  public static void loadChannelProps(File dir)
  {
    ChannelProperties.loadProps(dir);
  }

  private static Properties userPreferences = null;

  public static String getUserPreference(String key)
  {
    if (userPreferences == null)
    {
      String channelPrefsFilename = ChannelProperties
              .getProperty("preferences.filename");
      if (channelPrefsFilename == null)
      {
        return null;
      }
      File propertiesFile = new File(System.getProperty("user.home"),
              channelPrefsFilename);
      if (!propertiesFile.exists())
      {
        return null;
      }
      try
      {
        userPreferences = new Properties();
        userPreferences.load(new FileInputStream(propertiesFile));
      } catch (FileNotFoundException e)
      {
        // didn't find user preferences file
        return null;
      } catch (IOException e)
      {
        System.err.println(e.getMessage());
        return null;
      }
    }
    return userPreferences.getProperty(key);
  }

  public static boolean getBooleanUserPreference(String key)
  {
    return Boolean.parseBoolean(getUserPreference(key));
  }
}