save for each rcpt in haraka mail server

save_each_rctp_to.js

var fs = require('fs');
var os = require('os');

var tempDir = os.tmpdir();

exports.hook_queue = function(next, connection) {
    var i;
    var done=0;
    var ws = [];
    var rcpts = transaction.rcpt_to.lenght;
    for(i=0;i<rcpts;i++){
        var ws[i] = fs.createWriteStream(
            tempDir + '/mail.' + transaction.uuid + '.' + transaction.rcpt_to[i].user + 
            '.' + transaction.rcpt_to[i].host + '.' + i + '.eml'
        );
        ws[i].once('close', function () {
            done++;
            if(done === (rcpts - 1)){
                return next(OK);
            }
        });
        connection.transaction.message_stream.pipe(ws[i]);
    }
};