content: /*
   * Copyright 2020 Google Inc.
   *
   * 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 com.android_academy.covid_19.util.kml;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /** Utility methods for KML */
  public class KmlUtil {
  
    /**
     * Substitute property values in BalloonStyle text template
     *
     * @param template text template
     * @param placemark placemark to get property values from
     * @return string with property values substituted
     */
    public static String substituteProperties(String template, KmlPlacemark placemark) {
      StringBuffer sb = new StringBuffer();
      Pattern pattern = Pattern.compile("\\$\\[(.+?)]");
      Matcher matcher = pattern.matcher(template);
      while (matcher.find()) {
        String property = matcher.group(1);
        String value = placemark.getProperty(property);
        if (value != null) {
          matcher.appendReplacement(sb, value);
        }
      }
      matcher.appendTail(sb);
      return sb.toString();
    }
  }
  