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// Copyright (C) 2013 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.server.restapi.group;

import com.google.gerrit.entities.GroupDescription;
import com.google.gerrit.exceptions.NoSuchGroupException;
import com.google.gerrit.extensions.common.GroupInfo;
import com.google.gerrit.extensions.restapi.ResourceNotFoundException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.server.account.GroupControl;
import com.google.gerrit.server.group.GroupResource;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.inject.Inject;
import com.google.inject.Singleton;

@Singleton
public class GetOwner implements RestReadView {

  private final GroupControl.Factory controlFactory;
  private final GroupJson json;

  @Inject
  GetOwner(GroupControl.Factory controlFactory, GroupJson json) {
    this.controlFactory = controlFactory;
    this.json = json;
  }

  @Override
  public Response apply(GroupResource resource)
      throws NotInternalGroupException, ResourceNotFoundException, PermissionBackendException {
    GroupDescription.Internal group =
        resource.asInternalGroup().orElseThrow(NotInternalGroupException::new);
    try {
      GroupControl c = controlFactory.validateFor(group.getOwnerGroupUUID());
      return Response.ok(json.format(c.getGroup()));
    } catch (NoSuchGroupException e) {
      throw new ResourceNotFoundException(group.getOwnerGroupUUID().get(), e);
    }
  }
}