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/*
 * Copyright (C) 2019-2021 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 static com.github.tomakehurst.wiremock.common.Encoding.decodeBase64;
import static com.github.tomakehurst.wiremock.common.Encoding.encodeBase64;

import com.github.jknack.handlebars.Helper;
import com.github.jknack.handlebars.Options;
import com.github.jknack.handlebars.TagType;
import java.io.IOException;

public class Base64Helper implements Helper {

  @Override
  public Object apply(Object context, Options options) throws IOException {
    String value =
        options.tagType == TagType.SECTION ? options.fn(context).toString() : context.toString();

    if (Boolean.TRUE.equals(options.hash.get("decode"))) {
      return new String(decodeBase64(value));
    }

    Object paddingOption = options.hash.get("padding");
    boolean padding = paddingOption == null || Boolean.TRUE.equals(paddingOption);
    return encodeBase64(value.getBytes(), padding);
  }
}