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.state.quicklinksprofile;
  
  import static org.apache.ambari.server.state.quicklinksprofile.Filter.VISIBLE;
  import static org.apache.ambari.server.state.quicklinksprofile.LinkAttributeFilter.LINK_ATTRIBUTE;
  import static org.apache.ambari.server.state.quicklinksprofile.LinkNameFilter.LINK_NAME;
  import static org.apache.ambari.server.state.quicklinksprofile.LinkNameFilter.LINK_URL;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import javax.annotation.Nullable;
  
  import com.google.common.base.Preconditions;
  import com.google.common.collect.ImmutableList;
  import com.google.common.collect.ImmutableSet;
  import com.google.common.collect.Sets;
  
  /**
   * Class to create a {@link QuickLinksProfile} based on data received in a request
   */
  public class QuickLinksProfileBuilder {
  
    public static final String NAME = "name";
    public static final String COMPONENTS = "components";
    public static final String FILTERS = "filters";
    public static final Set<String> ALLOWED_FILTER_ATTRIBUTES =
        ImmutableSet.of(VISIBLE, LINK_NAME, LINK_URL, LINK_ATTRIBUTE);
  
    /**
     *
     * @param globalFiltersRaw The data in the request belonging to the "quicklinks_profile/filters" key.
     * @param serviceFiltersRaw The data in the request belonging to "quicklinks_profile/services"
     * @return The quicklinks profile as Json encoded string.
     * @throws QuickLinksProfileEvaluationException when the received data defines an invalid profile. This can be of various
     *    reasons: the received data is has invalid structure, critical data is missing or there are contradicting filter
     *    rules in the profile
     */
    public String buildQuickLinksProfile(@Nullable Object globalFiltersRaw, @Nullable Object serviceFiltersRaw) throws QuickLinksProfileEvaluationException {
      try {
        List<Filter> globalFilters = buildQuickLinkFilters(globalFiltersRaw);
        List<Service> services = buildServices(serviceFiltersRaw);
        QuickLinksProfile profile = QuickLinksProfile.create(globalFilters, services);
        // sanity check: this should throw QuickLinksProfileEvaluationException if the profile is invalid
        new DefaultQuickLinkVisibilityController(profile);
        return new QuickLinksProfileParser().encode(profile);
      }
      catch (QuickLinksProfileEvaluationException ex) {
        throw ex;
      }
      catch (Exception ex) {
        throw new QuickLinksProfileEvaluationException("Error interpreting quicklinks profile data", ex);
      }
    }
  
    List<Service> buildServices(@Nullable Object servicesRaw) {
      if (null == servicesRaw) {
        return ImmutableList.of();
      }
      List<Service> services = new ArrayList<>();
      for (Map<String, Object> serviceAsMap: (Collection<Map<String, Object>>)servicesRaw) {
        String serviceName = (String)serviceAsMap.get(NAME);
        Object componentsRaw = serviceAsMap.get(COMPONENTS);
        Object filtersRaw = serviceAsMap.get(FILTERS);
        services.add(Service.create(serviceName,
            buildQuickLinkFilters(filtersRaw),
            buildComponents(componentsRaw)));
      }
      return services;
    }
  
    List<Component> buildComponents(@Nullable Object componentsRaw) {
      if (null == componentsRaw) {
        return ImmutableList.of();
      }
      List<Component> components = new ArrayList<>();
      for (Map<String, Object> componentAsMap: (Collection<Map<String, Object>>)componentsRaw) {
        String componentName = (String)componentAsMap.get(NAME);
        Object filtersRaw = componentAsMap.get(FILTERS);
        components.add(Component.create(componentName,
            buildQuickLinkFilters(filtersRaw)));
      }
      return components;  }
  
  
    List<Filter> buildQuickLinkFilters(@Nullable Object filtersRaw) throws ClassCastException, IllegalArgumentException {
      if (null == filtersRaw) {
        return ImmutableList.of();
      }
      List<Filter> filters  = new ArrayList<>();
      for (Map<String, String> filterAsMap: (Collection<Map<String, String>>)filtersRaw) {
        Set<String> invalidAttributes = Sets.difference(filterAsMap.keySet(), ALLOWED_FILTER_ATTRIBUTES);
  
        Preconditions.checkArgument(invalidAttributes.isEmpty(),
            "%s%s",
            QuickLinksFilterDeserializer.PARSE_ERROR_MESSAGE_INVALID_JSON_TAG,
            invalidAttributes);
  
        String linkName = filterAsMap.get(LINK_NAME);
        String linkUrl = filterAsMap.get(LINK_URL);
        String attributeName = filterAsMap.get(LINK_ATTRIBUTE);
        boolean visible = Boolean.parseBoolean(filterAsMap.get(VISIBLE));
  
        Preconditions.checkArgument(null == linkName || null == attributeName,
           "%s link_name: %s, link_attribute: %s",
            QuickLinksFilterDeserializer.PARSE_ERROR_MESSAGE_AMBIGUOUS_FILTER,
            linkName,
            attributeName);
  
        Preconditions.checkArgument(null == linkUrl || null != linkName,
          "Invalid filter. Link url can only be applied to link name filters. link_url: %s",
          linkUrl);
  
        if (null != linkName) {
          filters.add(Filter.linkNameFilter(linkName, linkUrl, visible));
        }
        else if (null != attributeName) {
          filters.add(Filter.linkAttributeFilter(attributeName, visible));
        }
        else {
          filters.add(Filter.acceptAllFilter(visible));
        }
      }
      return filters;
    }
  
  
  }
  