/*
 * Copyright 2011 Jonathan Anderson
 *
 * 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 me.footlights.api;

import java.net.URI;
import java.nio.ByteBuffer;

import scala.Either;
import scala.Option;


/** An application's interface to the Footlights core. */
public interface KernelInterface
{
	/**
	 * Save data to a logical file.
	 */
	public Either<Exception,File> save(ByteBuffer data);

	/** Open a file by its URN. */
	public Either<Exception,File> open(URI name);

	/**
	 * Open a file using a hierarchical directory namespace.
	 *
	 * The name given can be rooted in either a URN (e.g. "urn:foo/some/path/to/file") or an
	 * app-specific root (e.g. "/my/path/to/a/file").
	 */
	public Either<Exception,File> open(String name);

	/**
	 * Open a mutable directory.
	 *
	 * A mutable directory is actually a wrapper around an immutable construct, but the details
	 * are hidden from applications.
	 *
	 * An application that wants a hierarchical directory structure can start with a call to
	 * kernel.openDirectory("/"), which is the "virtual root" for the application.
	 */
	public Either<Exception,Directory> openDirectory(String name);

	/** Open a file on the local machine (e.g. a photo to upload). */
	public Either<Exception,File> openLocalFile();

	/** Save data into a local file. */
	public Either<Exception,File> saveLocalFile(File file);

	/**
	 * Ask the user a question.
	 *
	 * The mechanism (e.g. pop-up vs. more gentle prompt) is undefined, but this method is
	 * synchronous.
	 */
	public Either<Exception,String> promptUser(String prompt, Option<String> defaultValue);

	/** Convenience method with no default value. */
	public Either<Exception,String> promptUser(String prompt);

	/** Share a {@link Directory} with another user. */
	public Either<Exception,Directory> share(Directory dir);

	/** Open a snapshot of a directory with another app. */
	public Either<Exception,Directory> openWithApplication(Directory dir);
}

@@ -2349,22 +2349,8 @@
 n a 
-snapshot of a 
 dire

Comment fix.