package de.spiritscorp.datasync.model;
   
   /*-
    * 		Data Sync
    *
    * 		Copyright ©   2022    The Spirit
    * 		@email                        thespirit@spiritscorp.network
    *
    * 		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/>.
   */
  
  import java.io.IOException;
  import java.nio.file.FileVisitResult;
  import java.nio.file.FileVisitor;
  import java.nio.file.Path;
  import java.nio.file.attribute.BasicFileAttributes;
  import java.util.Map;
  import java.util.concurrent.ExecutorService;
  
  import de.spiritscorp.datasync.ScanType;
  import de.spiritscorp.datasync.io.Debug;
  
  class FileVisit implements FileVisitor<Path> {
  	private final ExecutorService executor;
  	private final Path path;
  	private final Map<Path, FileAttributes> map;
  	private final ScanType deepScan;
  
  	/**
  	 * @param executor
  	 * @param path
  	 * @param map
  	 * @param deepScan
  	 */
  	FileVisit( final ExecutorService executor, final Path path, final Map<Path, FileAttributes> map, final ScanType deepScan ) {
  		this.executor = executor;
  		this.path = path;
  		this.map = map;
  		this.deepScan = deepScan;
  	}
  
  	@Override
  	public FileVisitResult preVisitDirectory( final Path dir, final BasicFileAttributes attrs ) throws IOException {
  		if( dir != null ) {
  			if( dir.endsWith( "$RECYCLE.BIN" ) ||
  					dir.endsWith( "Papierkorb" ) ||
  					attrs.isSymbolicLink() ||
  					attrs.isOther() ) { return FileVisitResult.SKIP_SUBTREE; }
  		}
  		return FileVisitResult.CONTINUE;
  	}
  
  	@Override
  	public FileVisitResult visitFile( final Path file, final BasicFileAttributes attrs ) throws IOException {
  		if( attrs.isSymbolicLink() || !attrs.isRegularFile() ) {
  			Debug.printDebug( "[File Visit] Skip_VisitFile -> " + file );
  			return FileVisitResult.CONTINUE;
  		}
  		executor.execute( new FileScan( file.normalize(), path.normalize(), map, deepScan, attrs ) );
  		return FileVisitResult.CONTINUE;
  	}
  
  	@Override
  	public FileVisitResult visitFileFailed( final Path file, final IOException exc ) throws IOException {
  		Debug.printDebug( "[File Visit] VisitFileFailed -> " + file );
  		return FileVisitResult.CONTINUE;
  	}
  
  	@Override
  	public FileVisitResult postVisitDirectory( final Path dir, final IOException exc ) throws IOException {
  		return FileVisitResult.CONTINUE;
  	}
  
  }