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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.config;

import com.google.gerrit.extensions.common.VersionInfo;
import com.google.gerrit.extensions.restapi.CacheControl;
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.config.ConfigResource;
import com.google.inject.Inject;
import java.util.concurrent.TimeUnit;
import org.kohsuke.args4j.Option;

public class GetVersion implements RestReadView {

  @Option(
      name = "--verbose",
      aliases = {"-v"},
      usage = "verbose version info")
  boolean verbose;

  private final VersionInfo versionInfo;

  @Inject
  public GetVersion(VersionInfo versionInfo) {
    this.versionInfo = versionInfo;
  }

  @Override
  public Response apply(ConfigResource resource) throws ResourceNotFoundException {
    if (versionInfo.gerritVersion == null) {
      throw new ResourceNotFoundException();
    }
    if (verbose) {
      return Response.ok(versionInfo).caching(CacheControl.PRIVATE(30, TimeUnit.SECONDS));
    }
    return Response.ok(versionInfo.gerritVersion)
        .caching(CacheControl.PRIVATE(30, TimeUnit.SECONDS));
  }
}