/*
 * Copyright © 2018 Tinkoff Bank
 *
 * 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 ru.tinkoff;

/*
 * @author Snezhana Krass
 */

import io.vavr.control.Try;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import spark.ResponseTransformer;

import static ru.tinkoff.ParserUtils.writeAsString;

public class JsonTransformer implements ResponseTransformer {

    private static final Logger logger = LoggerFactory.getLogger(JsonTransformer.class);

    @Override
    public String render(Object model) {
        Try<String> rendered = writeAsString(model);
        if (rendered.isSuccess()) {
            return rendered.get();
        } else {
            return null;
        }
    }
}