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/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.server.ce.ws;

import java.util.List;
import org.sonar.api.server.ws.Request;
import org.sonar.api.server.ws.Response;
import org.sonar.api.server.ws.WebService;
import org.sonar.api.web.UserRole;
import org.sonar.core.util.Uuids;
import org.sonar.db.DbClient;
import org.sonar.db.DbSession;
import org.sonar.db.ce.CeActivityDto;
import org.sonar.db.ce.CeTaskQuery;
import org.sonar.db.ce.CeQueueDto;
import org.sonar.server.user.UserSession;
import org.sonar.server.ws.WsUtils;

import static org.sonarqube.ws.WsCe.ProjectResponse;

public class ComponentAction implements CeWsAction {

  public static final String PARAM_COMPONENT_UUID = "componentId";

  private final UserSession userSession;
  private final DbClient dbClient;
  private final TaskFormatter formatter;

  public ComponentAction(UserSession userSession, DbClient dbClient, TaskFormatter formatter) {
    this.userSession = userSession;
    this.dbClient = dbClient;
    this.formatter = formatter;
  }

  @Override
  public void define(WebService.NewController controller) {
    WebService.NewAction action = controller.createAction("component")
      .setDescription("Get the pending tasks, in-progress tasks and the last executed task of a given component " +
        "(usually a project). Requires the administration permission on the component.")
      .setSince("5.2")
      .setResponseExample(getClass().getResource("component-example.json"))
      .setHandler(this);

    action.createParam(PARAM_COMPONENT_UUID)
      .setRequired(true)
      .setExampleValue(Uuids.UUID_EXAMPLE_01);
  }

  @Override
  public void handle(Request wsRequest, Response wsResponse) throws Exception {
    String componentUuid = wsRequest.mandatoryParam(PARAM_COMPONENT_UUID);
    userSession.checkComponentUuidPermission(UserRole.USER, componentUuid);

    DbSession dbSession = dbClient.openSession(false);
    try {
      List queueDtos = dbClient.ceQueueDao().selectByComponentUuid(dbSession, componentUuid);
      CeTaskQuery activityQuery = new CeTaskQuery()
        .setComponentUuid(componentUuid)
        .setOnlyCurrents(true);
      List activityDtos = dbClient.ceActivityDao().selectByQuery(dbSession, activityQuery, 0, 1);

      ProjectResponse.Builder wsResponseBuilder = ProjectResponse.newBuilder();
      wsResponseBuilder.addAllQueue(formatter.formatQueue(dbSession, queueDtos));
      if (activityDtos.size() == 1) {
        wsResponseBuilder.setCurrent(formatter.formatActivity(dbSession, activityDtos.get(0)));
      }
      WsUtils.writeProtobuf(wsResponseBuilder.build(), wsRequest, wsResponse);

    } finally {
      dbClient.closeSession(dbSession);
    }
  }
}