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 * Copyright © 2013-2016 The Nxt Core Developers.                             *
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 * 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.                                                                      *
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 * Removal or modification of this copyright notice is prohibited.            *
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 ******************************************************************************/

package nxt.http;

import nxt.Account;
import nxt.Alias;
import nxt.Attachment;
import nxt.NxtException;
import org.json.simple.JSONStreamAware;

import javax.servlet.http.HttpServletRequest;

import static nxt.http.JSONResponses.INCORRECT_ALIAS_NOTFORSALE;


public final class BuyAlias extends CreateTransaction {

    static final BuyAlias instance = new BuyAlias();

    private BuyAlias() {
        super(new APITag[] {APITag.ALIASES, APITag.CREATE_TRANSACTION}, "alias", "aliasName", "amountNQT");
    }

    @Override
    JSONStreamAware processRequest(HttpServletRequest req) throws NxtException {
        Account buyer = ParameterParser.getSenderAccount(req);
        Alias alias = ParameterParser.getAlias(req);
        long amountNQT = ParameterParser.getAmountNQT(req);
        if (Alias.getOffer(alias) == null) {
            return INCORRECT_ALIAS_NOTFORSALE;
        }
        long sellerId = alias.getAccountId();
        Attachment attachment = new Attachment.MessagingAliasBuy(alias.getAliasName());
        return createTransaction(req, buyer, sellerId, amountNQT, attachment);
    }
}