/******************************************************************************
 * Copyright © 2013-2016 The Nxt Core Developers.                             *
 *                                                                            *
 * See the AUTHORS.txt, DEVELOPER-AGREEMENT.txt and LICENSE.txt files at      *
 * the top-level directory of this distribution for the individual copyright  *
 * holder information and the developer policies on copyright and licensing.  *
 *                                                                            *
 * Unless otherwise agreed in a custom licensing agreement, no part of the    *
 * Nxt software, including this file, may be copied, modified, propagated,    *
 * or distributed except according to the terms contained in the LICENSE.txt  *
 * file.                                                                      *
 *                                                                            *
 * Removal or modification of this copyright notice is prohibited.            *
 *                                                                            *
 ******************************************************************************/

package nxt.http;

import nxt.Nxt;
import nxt.Transaction;
import org.json.simple.JSONStreamAware;

import javax.servlet.http.HttpServletRequest;

import static nxt.http.JSONResponses.PRUNED_TRANSACTION;
import static nxt.http.JSONResponses.UNKNOWN_TRANSACTION;

public class RetrievePrunedTransaction extends APIServlet.APIRequestHandler {

    static final RetrievePrunedTransaction instance = new RetrievePrunedTransaction();

    private RetrievePrunedTransaction() {
        super(new APITag[] {APITag.TRANSACTIONS}, "transaction");
    }

    @Override
    JSONStreamAware processRequest(HttpServletRequest req) throws ParameterException {
        long transactionId = ParameterParser.getUnsignedLong(req, "transaction", true);
        Transaction transaction = Nxt.getBlockchain().getTransaction(transactionId);
        if (transaction == null) {
            return UNKNOWN_TRANSACTION;
        }
        transaction = Nxt.getBlockchainProcessor().restorePrunedTransaction(transactionId);
        if (transaction == null) {
            return PRUNED_TRANSACTION;
        }
        return JSONData.transaction(transaction);
    }

    @Override
    final boolean requirePost() {
        return true;
    }

    @Override
    final boolean allowRequiredBlockParameters() {
        return false;
    }

}