org.mailster.smtp.core.commands.impl.ReceiptCommand Maven / Gradle / Ivy

package org.mailster.smtp.core.commands.impl;

import java.io.IOException;

import org.apache.mina.core.session.IoSession;
import org.mailster.smtp.api.handler.RejectException;
import org.mailster.smtp.core.SMTPContext;
import org.mailster.smtp.core.commands.AbstractCommand;

/**
 * The RCPT command implementation.
 *
 * @author De Oliveira Edouard <[email protected]>
 * @author Ian McFarland <[email protected]>
 * @author Jon Stevens
 * @author Jeff Schnitzer
 */
public class ReceiptCommand extends AbstractCommand {

    public ReceiptCommand() {
        super("RCPT",
              "The RCPT command specifies the recipient. This command can be used\n" + "any number of times to specify multiple recipients.",
              "TO: \n recipient = the email address of the recipient of the message");
    }

    @Override
    public void execute(String commandString, IoSession ioSession, SMTPContext ctx) throws IOException {
        var smtpState = ctx.getSMTPState();
        if (!smtpState.getHasSender()) {
            sendResponse(ioSession, "503 Error: need MAIL command");
            return;
        }

        var max = ctx.getSMTPServerConfig().getMaxRecipients();
        if (max > -1 && smtpState.getRecipientCount() >= max) {
            sendResponse(ioSession, "452 Too many recipients");
            return;
        }

        var args = getArgPredicate(commandString);
        if (args.toUpperCase().startsWith("TO:")) {
            var recipientAddress = extractEmailAddress(args, 3);
            if (isValidEmailAddress(recipientAddress)) {
                try {
                    ctx.getDeliveryHandler().recipient(recipientAddress);
                    smtpState.addRecipient();
                    sendResponse(ioSession, "250 Ok");
                } catch (RejectException ex) {
                    sendResponse(ioSession, ex.getMessage());
                }
            } else {
                sendResponse(ioSession, "553 <" + recipientAddress + "> Invalid email address");
            }
        } else {
            sendResponse(ioSession, "501 Syntax: RCPT TO:  Error in parameters: \"" + args + "\"");
        }
    }
}