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/*
 * Copyright (C) 2018-2021 Thomas Akehurst
 *
 * 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.github.tomakehurst.wiremock.extension.responsetemplating.helpers;

import com.github.jknack.handlebars.Options;
import com.github.tomakehurst.wiremock.common.DateTimeOffset;
import java.io.IOException;
import java.time.ZoneId;
import java.util.Date;

public class HandlebarsCurrentDateHelper extends HandlebarsHelper {

  @Override
  public Object apply(Date context, Options options) throws IOException {
    String format = options.hash("format", null);
    String offset = options.hash("offset", null);
    String timezone = options.hash("timezone", null);

    ZoneId zoneId;
    Date date;

    if (context instanceof RenderableDate) {
      date = context;
      RenderableDate renderableDate = (RenderableDate) context;
      zoneId = renderableDate.getTimezone();
    } else {
      date = context != null ? context : new Date();
      zoneId = timezone != null ? ZoneId.of(timezone) : null;
    }

    if (offset != null) {
      date = DateTimeOffset.fromString(offset).shift(date);
    }

    return new RenderableDate(date, format, zoneId);
  }
}