/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.slc.core.deploy;
  
  import java.io.File;
  import java.io.IOException;
  
  import org.apache.commons.io.FileUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.argeo.slc.SlcException;
  import org.argeo.slc.deploy.VersioningDriver;
  
  /**
   * Synchronizes an URL to a local directory, taking into account versioning
   * information if possible.
   */
  public class VersionedDirSync implements Runnable {
  	private final static Log log = LogFactory.getLog(VersionedDirSync.class);
  
  	private VersioningDriver versioningDriver;
  	private File dir;
  	private String url;
  	private Boolean clean = false;
  
  	private Boolean changed = null;
  
  	public void run() {
  		changed = null;
  		if (clean) {
  			try {
  				log.info("Clean " + dir);
  				FileUtils.deleteDirectory(dir);
  			} catch (IOException e) {
  				throw new SlcException("Cannot delete checkout directory "
  						+ dir, e);
  			}
  			dir.mkdirs();
  		}
  		log.info("Checkout " + url + " to " + dir);
  		changed = versioningDriver.checkout(url, dir, true);
  		if (log.isDebugEnabled())
  			log.debug("Synchronized " + url + " to " + dir);
  	}
  
  	public void setVersioningDriver(VersioningDriver versioningDriver) {
  		this.versioningDriver = versioningDriver;
  	}
  
  	public void setDir(File dir) {
  		this.dir = dir;
  	}
  
  	public void setUrl(String url) {
  		this.url = url;
  	}
  
  	/** Delete before checkout */
  	public void setClean(Boolean clean) {
  		this.clean = clean;
  	}
  
  	/** Whether last call has changed the directory */
  	public Boolean getChanged() {
  		if (changed == null)
  			throw new SlcException("Sync has not run");
  		return changed;
  	}
  
  }