wildduck/lib/forward.js

'use strict';

const config = require('config');
const maildrop = require('./maildrop');

module.exports = (options, callback) => {
    if (!config.sender.enabled) {
        return callback(null, false);
    }

    let message = maildrop({
        from: options.sender,
        to: options.recipient,

        forward: options.forward,
        http: !!options.targetUrl,
        targeUrl: options.targetUrl,

        interface: 'forwarder'
    }, callback);

    setImmediate(() => {
        let pos = 0;
        let writeNextChunk = () => {
            if (pos >= options.chunks.length) {
                return message.end();
            }
            let chunk = options.chunks[pos++];
            if (!message.write(chunk)) {
                return message.once('drain', writeNextChunk);
            } else {
                setImmediate(writeNextChunk);
            }
        };
        setImmediate(writeNextChunk);
    });
};