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.camel.component.google.mail.stream;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import com.google.api.services.gmail.Gmail;
  import com.google.api.services.gmail.model.Label;
  import com.google.api.services.gmail.model.ListLabelsResponse;
  import com.google.common.base.Splitter;
  import org.apache.camel.Category;
  import org.apache.camel.Consumer;
  import org.apache.camel.Processor;
  import org.apache.camel.Producer;
  import org.apache.camel.component.google.mail.GoogleMailClientFactory;
  import org.apache.camel.spi.EndpointServiceLocation;
  import org.apache.camel.spi.UriEndpoint;
  import org.apache.camel.spi.UriParam;
  import org.apache.camel.support.ScheduledPollEndpoint;
  import org.apache.camel.util.ObjectHelper;
  
  /**
   * Poll for incoming messages in Google Mail.
   */
  @UriEndpoint(firstVersion = "2.22.0",
               scheme = "google-mail-stream",
               title = "Google Mail Stream",
               syntax = "google-mail-stream:index",
               consumerOnly = true,
               category = { Category.CLOUD, Category.MAIL }, headersClass = GoogleMailStreamConstants.class)
  public class GoogleMailStreamEndpoint extends ScheduledPollEndpoint implements EndpointServiceLocation {
  
      @UriParam
      private GoogleMailStreamConfiguration configuration;
  
      public GoogleMailStreamEndpoint(String uri, GoogleMailStreamComponent component,
                                      GoogleMailStreamConfiguration endpointConfiguration) {
          super(uri, component);
          this.configuration = endpointConfiguration;
      }
  
      @Override
      public Producer createProducer() throws Exception {
          throw new UnsupportedOperationException("The camel google mail stream component doesn't support producer");
      }
  
      @Override
      public Consumer createConsumer(Processor processor) throws Exception {
          String unreadLabelId = null;
          List<String> labelsIds = new ArrayList<>();
          ListLabelsResponse listResponse = getClient().users().labels().list("me").execute();
          for (Label label : listResponse.getLabels()) {
              Label countLabel = getClient().users().labels().get("me", label.getId()).execute();
              if (countLabel.getName().equalsIgnoreCase("UNREAD")) {
                  unreadLabelId = countLabel.getId();
              }
          }
          if (ObjectHelper.isNotEmpty(getConfiguration().getLabels())) {
              List<String> plainLabels = splitLabels(getConfiguration().getLabels());
              for (Label label : listResponse.getLabels()) {
                  Label countLabel = getClient().users().labels().get("me", label.getId()).execute();
                  for (String plainLabel : plainLabels) {
                      if (countLabel.getName().equalsIgnoreCase(plainLabel)) {
                          labelsIds.add(countLabel.getId());
                      }
                  }
              }
          }
          final GoogleMailStreamConsumer consumer = new GoogleMailStreamConsumer(this, processor, unreadLabelId, labelsIds);
          configureConsumer(consumer);
          return consumer;
      }
  
      public Gmail getClient() {
          return ((GoogleMailStreamComponent) getComponent()).getClient(configuration);
      }
  
      public GoogleMailClientFactory getClientFactory() {
          return ((GoogleMailStreamComponent) getComponent()).getClientFactory();
      }
  
      public void setClientFactory(GoogleMailClientFactory clientFactory) {
          ((GoogleMailStreamComponent) getComponent()).setClientFactory(clientFactory);
      }
  
      public GoogleMailStreamConfiguration getConfiguration() {
          return configuration;
      }
  
      private List<String> splitLabels(String labels) {
          return Splitter.on(',').splitToList(labels);
      }
  
      @Override
      public String getServiceUrl() {
          if (ObjectHelper.isNotEmpty(ObjectHelper.isNotEmpty(configuration.getApplicationName())
                  && ObjectHelper.isNotEmpty(configuration.getIndex()))) {
              return getServiceProtocol() + ":" + configuration.getApplicationName() + ":" + configuration.getIndex();
          }
          return null;
      }
  
      @Override
      public String getServiceProtocol() {
          return "mail-stream";
      }
  }
  