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    * #%L
    * wcm.io
    * %%
    * Copyright (C) 2015 wcm.io
    * %%
    * 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.
   * #L%
   */
  package io.wcm.caravan.hal.docs.impl.augmenter;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.apache.commons.lang3.StringUtils;
  
  import com.google.common.collect.ImmutableMap;
  
  import io.wcm.caravan.hal.docs.impl.model.LinkRelation;
  import io.wcm.caravan.hal.docs.impl.model.Service;
  
  /**
   * Curie and link relation title metadata extracted from service info metadata.
   */
  class DocsMetadata {
  
    private final Map<String, String> curieLinks;
    private final Map<String, String> linkRelationTitles;
  
    /**
     * @param serviceModel Service model
     * @param docsPath Documenation URI base path
     */
    DocsMetadata(Service serviceModel, String docsPath) {
      curieLinks = buildCurieLinkMap(serviceModel, docsPath);
      linkRelationTitles = buildLinkRelationTitlesMap(serviceModel);
    }
  
    private static Map<String, String> buildCurieLinkMap(Service serviceModel, String docsPath) {
      Map<String, String> map = new HashMap<>();
  
      serviceModel.getLinkRelations().stream()
          .map(rel -> CurieUtil.getCurieName(rel.getRel()))
          .filter(StringUtils::isNotEmpty)
          .forEach(curie -> map.put(curie, CurieUtil.toDocTemplate(docsPath, curie)));
  
      return ImmutableMap.copyOf(map);
    }
  
    private static Map<String, String> buildLinkRelationTitlesMap(Service serviceModel) {
      Map<String, String> map = new HashMap<>();
  
      for (LinkRelation rel : serviceModel.getLinkRelations()) {
        String title = rel.getShortDescription();
        if (title != null) {
          map.put(rel.getRel(), title);
        }
      }
  
      return ImmutableMap.copyOf(map);
    }
  
    public String getCurieLink(String curie) {
      return curieLinks.get(curie);
    }
  
    public String getLinkRelationTitle(String rel) {
      return linkRelationTitles.get(rel);
    }
  
  }