content: /*
   * 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.ambari.server.api.resources;
  
  
  import java.util.Arrays;
  import java.util.List;
  
  import org.apache.ambari.server.api.services.Request;
  import org.apache.ambari.server.api.util.TreeNode;
  import org.apache.ambari.server.controller.internal.RequestResourceProvider;
  import org.apache.ambari.server.controller.spi.Resource;
  
  
  /**
   * Request resource definition.
   */
  public class RequestResourceDefinition extends BaseResourceDefinition {
  
    /**
     * Constructor.
     */
    public RequestResourceDefinition() {
      super(Resource.Type.Request, Resource.Type.Stage, Resource.Type.Task);
    }
  
    @Override
    public String getPluralName() {
      return "requests";
    }
  
    @Override
    public String getSingularName() {
      return "request";
    }
  
    @Override
    public List<PostProcessor> getPostProcessors() {
      return Arrays.asList(new RequestHrefPostProcessor(), new RequestSourceScheduleHrefPostProcessor());
    }
  
    private class RequestHrefPostProcessor implements PostProcessor {
      @Override
      public void process(Request request, TreeNode<Resource> resultNode,
          String href) {
        Object requestId = resultNode.getObject().getPropertyValue(
            getClusterController().getSchema(Resource.Type.Request)
                .getKeyPropertyId(Resource.Type.Request));
  
        // sanity check for a trailing slash since this would cause problems
        // with string-based URL matching
        if (href.endsWith("/")) {
          href = href.substring(0, href.length() - 1);
        }
  
        // if the original href was for a "request", then shortcut and just
        // append the ID onto the URL
        StringBuilder sb = new StringBuilder();
        if (href.endsWith("/requests")) {
          sb.append(href);
          sb.append('/').append(requestId);
        } else {
          // split the href up into its parts, intercepting "clusters" in order
          // to rewrite the href to be scoped for requests
          String[] tokens = href.split("/");
  
          Integer tokenCount = tokens.length;
          for (int i = 0; i < tokenCount; ++i) {
            String fragment = tokens[i];
            sb.append(fragment);
            if (i < tokenCount - 1 ) {
              sb.append('/');
            }
  
            if ("clusters".equals(fragment) && i + 1 < tokenCount) {
              String clusterName = getClusterName(tokens[i + 1]);
              sb.append(clusterName).append("/");
              sb.append("requests/").append(requestId);
              break;
            }
          }
        }
  
        resultNode.setProperty("href", sb.toString());
      }
  
      /**
       * Get cluster name
       * Remove query paramter string if there is any
       *
       * @param token
       * @return String
       * */
      private String getClusterName(String token){
        int pos = token.indexOf('?');
        if(pos > 0) { //cluster name requires to have at least one alphanumeric letter
          return token.substring(0, pos);
        } else {
          return token;
        }
      }
    }
  
    private class RequestSourceScheduleHrefPostProcessor implements PostProcessor {
  
      @Override
      public void process(Request request, TreeNode<Resource> resultNode, String href) {
        StringBuilder sb = new StringBuilder();
        String[] toks = href.split("/");
  
        for (int i = 0; i < toks.length; ++i) {
          String s = toks[i];
          sb.append(s).append('/');
          if ("clusters".equals(s)) {
            sb.append(toks[i + 1]).append('/');
            break;
          }
        }
  
        Object scheduleId = resultNode.getObject().getPropertyValue(RequestResourceProvider.REQUEST_SOURCE_SCHEDULE_ID);
        if (scheduleId != null) {
          sb.append("request_schedules/").append(scheduleId);
          resultNode.getObject().setProperty(RequestResourceProvider.REQUEST_SOURCE_SCHEDULE_HREF, sb.toString());
        }
      }
    }
  }
  