// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC 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.openqa.selenium.grid.gridui;

import java.net.MalformedURLException;
import java.net.URL;
import org.openqa.selenium.grid.server.Server;

class Urls {

  private Urls() {
    // Utility class
  }

  public static String whereIs(Server<?> server, String url) {
    return getRelativeUrl(server.getUrl(), url).toString();
  }

  public static URL getRelativeUrl(URL base, String relativePath) {
    if (relativePath.isEmpty() || "/".equals(relativePath)) {
      return base;
    }

    try {
      String path = base.getPath();
      if (!path.endsWith("/")) {
        path = path + "/";
      }

      if (relativePath.startsWith("/")) {
        path = path + relativePath.substring(1);
      } else {
        path = path + relativePath;
      }

      return new URL(base, path);
    } catch (MalformedURLException e) {
      throw new RuntimeException(e);
    }
  }
}
