/*
 * Copyright 2012-2020 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 org.springframework.boot.buildpack.platform.docker.configuration;

import com.fasterxml.jackson.core.JsonProcessingException;

import org.springframework.boot.buildpack.platform.json.SharedObjectMapper;
import org.springframework.util.Base64Utils;

/**
 * {@link DockerRegistryAuthentication} that uses creates a Base64 encoded auth header
 * value based on the JSON created from the instance.
 *
 * @author Scott Frederick
 */
class JsonEncodedDockerRegistryAuthentication implements DockerRegistryAuthentication {

	@Override
	public String createAuthHeader() {
		try {
			return Base64Utils.encodeToUrlSafeString(SharedObjectMapper.get().writeValueAsBytes(this));
		}
		catch (JsonProcessingException ex) {
			throw new IllegalStateException("Error creating Docker registry authentication header", ex);
		}
	}

}
