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/*
 * SonarQube
 * Copyright (C) 2009-2017 SonarSource SA
 * mailto:info 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.permission.ws;

import java.util.Optional;
import org.sonar.api.server.ws.Request;
import org.sonar.api.server.ws.Response;
import org.sonar.api.server.ws.WebService;
import org.sonar.db.DbClient;
import org.sonar.db.DbSession;
import org.sonar.db.component.ComponentDto;
import org.sonar.db.organization.OrganizationDto;
import org.sonar.server.exceptions.NotFoundException;
import org.sonar.server.permission.PermissionChange;
import org.sonar.server.permission.PermissionUpdater;
import org.sonar.server.permission.ProjectId;
import org.sonar.server.permission.UserId;
import org.sonar.server.permission.UserPermissionChange;
import org.sonar.server.user.UserSession;

import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Collections.singletonList;
import static org.sonar.server.permission.PermissionPrivilegeChecker.checkProjectAdmin;
import static org.sonar.server.permission.ws.PermissionsWsParametersBuilder.createOrganizationParameter;
import static org.sonar.server.permission.ws.PermissionsWsParametersBuilder.createPermissionParameter;
import static org.sonar.server.permission.ws.PermissionsWsParametersBuilder.createProjectParameters;
import static org.sonar.server.permission.ws.PermissionsWsParametersBuilder.createUserLoginParameter;
import static org.sonarqube.ws.client.permission.PermissionsWsParameters.PARAM_ORGANIZATION;
import static org.sonarqube.ws.client.permission.PermissionsWsParameters.PARAM_PERMISSION;
import static org.sonarqube.ws.client.permission.PermissionsWsParameters.PARAM_PROJECT_ID;
import static org.sonarqube.ws.client.permission.PermissionsWsParameters.PARAM_PROJECT_KEY;
import static org.sonarqube.ws.client.permission.PermissionsWsParameters.PARAM_USER_LOGIN;

public class AddUserAction implements PermissionsWsAction {

  public static final String ACTION = "add_user";

  private final DbClient dbClient;
  private final UserSession userSession;
  private final PermissionUpdater permissionUpdater;
  private final PermissionWsSupport support;

  public AddUserAction(DbClient dbClient, UserSession userSession, PermissionUpdater permissionUpdater, PermissionWsSupport support) {
    this.dbClient = dbClient;
    this.userSession = userSession;
    this.permissionUpdater = permissionUpdater;
    this.support = support;
  }

  @Override
  public void define(WebService.NewController context) {
    WebService.NewAction action = context.createAction(ACTION)
      .setDescription("Add permission to a user.
 " +
        "This service defaults to global permissions, but can be limited to project permissions by providing project id or project key.
" +
        "Requires one of the following permissions:" +
        "" +
        "'Administer System'" +
        "'Administer' rights on the specified project" +
        "")
      .setSince("5.2")
      .setPost(true)
      .setHandler(this);

    createPermissionParameter(action);
    createUserLoginParameter(action);
    createProjectParameters(action);
    createOrganizationParameter(action)
      .setSince("6.2")
      .setDescription("Key of organization, cannot be used at the same time with %s and %s", PARAM_PROJECT_ID, PARAM_PROJECT_KEY);
  }

  @Override
  public void handle(Request request, Response response) throws Exception {
    try (DbSession dbSession = dbClient.openSession(false)) {
      UserId user = support.findUser(dbSession, request.mandatoryParam(PARAM_USER_LOGIN));
      Optional project = support.findProject(dbSession, request);
      String organizationKey = request.param(PARAM_ORGANIZATION);
      checkArgument(!project.isPresent() || organizationKey == null, "Organization must not be set when project is set.");
      OrganizationDto org = project
        .map(dto -> dbClient.organizationDao().selectByUuid(dbSession, dto.getOrganizationUuid()))
        .orElseGet(() -> Optional.ofNullable(support.findOrganization(dbSession, organizationKey)))
        .orElseThrow(() -> new NotFoundException(String.format("Organization with key '%s' not found", organizationKey)));
      support.checkMembership(dbSession, org, user);

      Optional projectId = project.map(ProjectId::new);
      checkProjectAdmin(userSession, org.getUuid(), projectId);

      PermissionChange change = new UserPermissionChange(
        PermissionChange.Operation.ADD,
        org.getUuid(),
        request.mandatoryParam(PARAM_PERMISSION),
        projectId.orElse(null),
        user);
      permissionUpdater.apply(dbSession, singletonList(change));
    }
    response.noContent();
  }
}