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/*******************************************************************************
 * Copyright 2015-2024 Sergey Karpushin
 *
 * 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 org.summerb.webappboilerplate.utils;

import javax.servlet.http.HttpServletRequest;

import org.springframework.util.StringUtils;

public class AbsoluteUrlBuilderDefaultImpl implements AbsoluteUrlBuilder {
  @Override
  public String buildExternalUrl(String optionalRelativeUrl) {
    HttpServletRequest req = CurrentRequestUtils.get();
    String ret = req.getScheme() + "://" + req.getServerName();
    if (!(((req.getServerPort() == 80 && req.getScheme().equalsIgnoreCase("http"))
        || (req.getServerPort() == 443 && req.getScheme().equalsIgnoreCase("https"))))) {
      ret += ":" + req.getServerPort();
    }
    ret += req.getContextPath();

    if (StringUtils.hasText(optionalRelativeUrl)) {
      ret += optionalRelativeUrl;
    }
    return ret;
  }
}