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RESTHeart MongoDB - MongoDB plugin

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/*-
 * ========================LICENSE_START=================================
 * restheart-mongodb
 * %%
 * Copyright (C) 2014 - 2024 SoftInstigate
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see .
 * =========================LICENSE_END==================================
 */
package org.restheart.mongodb.handlers;

import io.undertow.server.HttpServerExchange;
import org.bson.BsonString;
import static org.restheart.exchange.ExchangeKeys._META;
import org.restheart.exchange.MongoResponse;
import org.restheart.handlers.PipelinedHandler;

/**
 * sets the _id=_meta in /_meta requests
 *
 * @author Andrea Di Cesare {@literal }
 */
public class MetaRequestTransformer extends PipelinedHandler {

    /**
     *
     * @param exchange
     */
    @Override
    public void handleRequest(final HttpServerExchange exchange) throws Exception {
        var content = MongoResponse.of(exchange).getContent();
        // for response phase
        if (content != null
                && content.isDocument()
                && content.asDocument().containsKey("_id")) {
            content.asDocument().put("_id", new BsonString(_META));
        }

        next(exchange);
    }
}