// Copyright (C) 2014 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.index.account;

import com.google.gerrit.entities.Account;
import com.google.gerrit.entities.RefNames;
import com.google.gerrit.extensions.events.GitBatchRefUpdateListener;
import com.google.gerrit.server.config.AllUsersName;
import com.google.inject.Inject;
import com.google.inject.Provider;

/**
 * Listener for ref update events that reindexes accounts in case the updated Git reference was used
 * to compute contents of an index document.
 *
 * <p>Will reindex accounts when the account's NoteDb ref changes.
 */
public class ReindexAccountsAfterRefUpdate implements GitBatchRefUpdateListener {
  private final AllUsersName allUsersName;
  private final Provider<AccountIndexer> accountIndexer;

  @Inject
  ReindexAccountsAfterRefUpdate(
      AllUsersName allUsersName, Provider<AccountIndexer> accountIndexer) {
    this.allUsersName = allUsersName;
    this.accountIndexer = accountIndexer;
  }

  @Override
  public void onGitBatchRefUpdate(Event event) {
    if (!allUsersName.get().equals(event.getProjectName())) {
      return;
    }
    for (UpdatedRef ref : event.getUpdatedRefs()) {
      if (RefNames.isRefsUsers(ref.getRefName()) && !RefNames.isRefsEdit(ref.getRefName())) {
        Account.Id accountId = Account.Id.fromRef(ref.getRefName());
        if (accountId != null) {
          accountIndexer.get().index(accountId);
        }
      }
    }
  }
}