src/main/java/com/googlesource/gerrit/plugins/replication/pull/api/UpdateHeadAction.java

// Copyright (C) 2021 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.googlesource.gerrit.plugins.replication.pull.api;

import com.google.common.base.Strings;
import com.google.gerrit.entities.RefNames;
import com.google.gerrit.extensions.api.projects.HeadInput;
import com.google.gerrit.extensions.restapi.AuthException;
import com.google.gerrit.extensions.restapi.BadRequestException;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.extensions.restapi.Response;
import com.google.gerrit.extensions.restapi.RestModifyView;
import com.google.gerrit.server.project.ProjectResource;
import com.google.inject.Inject;
import com.google.inject.Singleton;

@Singleton
public class UpdateHeadAction implements RestModifyView<ProjectResource, HeadInput> {
  private final FetchPreconditions preconditions;
  private final UpdateHeadCommand updateHeadCommand;

  @Inject
  UpdateHeadAction(FetchPreconditions preconditions, UpdateHeadCommand updateHeadCommand) {
    this.preconditions = preconditions;
    this.updateHeadCommand = updateHeadCommand;
  }

  @Override
  public Response<?> apply(ProjectResource projectResource, HeadInput input)
      throws AuthException, BadRequestException, ResourceConflictException, Exception {
    if (input == null || Strings.isNullOrEmpty(input.ref)) {
      throw new BadRequestException("ref required");
    }
    String ref = RefNames.fullName(input.ref);

    if (!preconditions.canCallUpdateHeadApi(projectResource.getNameKey(), ref)) {
      throw new AuthException("Update head not permitted");
    }

    updateHeadCommand.doUpdate(projectResource.getNameKey(), ref);

    return Response.ok(ref);
  }
}