package org.argeo.fs;
   
   import java.io.IOException;
   import java.nio.file.FileVisitResult;
   import java.nio.file.Files;
   import java.nio.file.Path;
   import java.nio.file.SimpleFileVisitor;
   import java.nio.file.attribute.BasicFileAttributes;
   
  /** Utilities around the standard Java file abstractions. */
  public class FsUtils {
  	/** Sync a source path with a target path. */
  	public static void sync(Path sourceBasePath, Path targetBasePath) {
  		sync(sourceBasePath, targetBasePath, false);
  	}
  
  	/** Sync a source path with a target path. */
  	public static void sync(Path sourceBasePath, Path targetBasePath, boolean delete) {
  		sync(new BasicSyncFileVisitor(sourceBasePath, targetBasePath, delete, true));
  	}
  
  	public static void sync(BasicSyncFileVisitor syncFileVisitor) {
  		try {
  			Files.walkFileTree(syncFileVisitor.getSourceBasePath(), syncFileVisitor);
  		} catch (Exception e) {
  			throw new RuntimeException("Cannot sync " + syncFileVisitor.getSourceBasePath() + " with "
  					+ syncFileVisitor.getTargetBasePath(), e);
  		}
  	}
  
  	/** Deletes this path, recursively if needed. */
  	public static void delete(Path path) {
  		try {
  			Files.walkFileTree(path, new SimpleFileVisitor<Path>() {
  				@Override
  				public FileVisitResult postVisitDirectory(Path directory, IOException e) throws IOException {
  					if (e != null)
  						throw e;
  					Files.delete(directory);
  					return FileVisitResult.CONTINUE;
  				}
  
  				@Override
  				public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
  					Files.delete(file);
  					return FileVisitResult.CONTINUE;
  				}
  			});
  		} catch (IOException e) {
  			throw new RuntimeException("Cannot delete " + path, e);
  		}
  	}
  
  	/** Singleton. */
  	private FsUtils() {
  	}
  
  }