/*
 * Copyright (C) 2014, Alexey Kuznetsov <axet@me.com>
 *
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Distribution License v1.0 which
 * accompanies this distribution, is reproduced below, and is
 * available at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 *
 * - Neither the name of the Eclipse Foundation, Inc. nor the
 *   names of its contributors may be used to endorse or promote
 *   products derived from this software without specific prior
 *   written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.eclipse.jgit.transport;

import org.eclipse.jgit.errors.UnsupportedCredentialItem;
import org.eclipse.jgit.transport.NetRC.NetRCEntry;

/**
 * Simple .netrc credentials provider. It can lookup the first machine entry
 * from your .netrc file.
 *
 * @since 3.5
 */
public class NetRCCredentialsProvider extends CredentialsProvider {

	NetRC netrc = new NetRC();

	/**
	 * <p>Constructor for NetRCCredentialsProvider.</p>
	 */
	public NetRCCredentialsProvider() {
	}

	/**
	 * Install default provider for the .netrc parser.
	 */
	public static void install() {
		CredentialsProvider.setDefault(new NetRCCredentialsProvider());
	}

	/** {@inheritDoc} */
	@Override
	public boolean supports(CredentialItem... items) {
		for (CredentialItem i : items) {
			if (i instanceof CredentialItem.Username)
				continue;
			else if (i instanceof CredentialItem.Password)
				continue;
			else
				return false;
		}
		return true;
	}

	/** {@inheritDoc} */
	@Override
	public boolean get(URIish uri, CredentialItem... items)
			throws UnsupportedCredentialItem {
		NetRCEntry cc = netrc.getEntry(uri.getHost());

		if (cc == null)
			return false;

		for (CredentialItem i : items) {
			if (i instanceof CredentialItem.Username) {
				((CredentialItem.Username) i).setValue(cc.login);
				continue;
			}
			if (i instanceof CredentialItem.Password) {
				((CredentialItem.Password) i).setValue(cc.password);
				continue;
			}
			if (i instanceof CredentialItem.StringType) {
				if (i.getPromptText().equals("Password: ")) { //$NON-NLS-1$
					((CredentialItem.StringType) i).setValue(new String(
							cc.password));
					continue;
				}
			}
			throw new UnsupportedCredentialItem(uri, i.getClass().getName()
					+ ":" + i.getPromptText()); //$NON-NLS-1$
		}
		return !isAnyNull(items);
	}

	/** {@inheritDoc} */
	@Override
	public boolean isInteractive() {
		return false;
	}
}