/*
 * Copyright 2017-2019 the original author or authors.
 *
 * 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
 *
 *      https://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.cloud.spring.data.spanner.repository.support;

import com.google.cloud.spring.data.spanner.core.mapping.event.BeforeSaveEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.data.auditing.AuditingHandler;

/**
 * Auditing event listener that listens for {@code BeforeSaveEvent}.
 *
 * @since 1.2
 */
public class SpannerAuditingEventListener implements ApplicationListener<BeforeSaveEvent> {

  private final AuditingHandler handler;

  /**
   * Constructor.
   *
   * @param spannerAuditingHandler the auditing handler to set auditing properties.
   */
  public SpannerAuditingEventListener(AuditingHandler spannerAuditingHandler) {
    this.handler = spannerAuditingHandler;
  }

  @Override
  public void onApplicationEvent(BeforeSaveEvent event) {
    event.getTargetEntities().forEach(this.handler::markModified);
  }
}
