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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.sshd.sftp.util;

import org.apache.sshd.common.keyprovider.FileKeyPairProvider;

import java.io.File;
import java.net.ServerSocket;
import java.net.URISyntaxException;
import java.net.URL;

public class Utils {

    public static FileKeyPairProvider createTestHostKeyProvider() {
        return createTestKeyPairProvider("hostkey.pem");
    }

    public static FileKeyPairProvider createTestKeyPairProvider(String resource) {
        return new FileKeyPairProvider(new String[] { getFile(resource) });
    }

    public static int getFreePort() throws Exception {
        ServerSocket s = new ServerSocket(0);
        try {
            return s.getLocalPort();
        } finally {
            s.close();
        }
    }

    private static String getFile(String resource) {
        URL url = Utils.class.getClassLoader().getResource(resource);
        File f;
        try {
            f = new File(url.toURI());
        } catch(URISyntaxException e) {
            f = new File(url.getPath());
        }
        return f.toString();
    }

}