Make the postmark api look like node_mailer

nodemailer-to-postmark.js

var request = require('request')
  , _       = require('underscore');

function send_mail(message, callback) {
  if(typeof exports.SMTP.api_key !== "string") {
    console.log(exports.SMTP)
    callback(new Error("No API Key was given"));
    return;
  }
  if(typeof exports.SMTP !== "object") {
    callback(new Error("Invalid SMTP options"));
    return;
  }
  var tr_message = {}
    , postmark_headers = 
      { "Accept":  "application/json"
      , "Content-Type":  "application/json"
      , "X-Postmark-Server-Token":  exports.SMTP.api_key
      };
  if(message.sender) {
    tr_message.From = message.sender;
  }
  if(message.to) {
    tr_message.To = message.to;
  }
  if(message.cc) {
    tr_message.Cc = message.cc;
  }
  if(message.bcc) {
    tr_message.Bcc = message.bcc;
  }
  if(message.subject) {
    tr_message.Subject = message.subject;
  }
  if(message.reply_to) {
    tr_message.ReplyTo = message.reply_to;
  }
  if(message.body) {
    tr_message.TextBody = message.body;
  }
  if(message.html) {
    tr_message.HtmlBody = message.html;
  }
  if(message.headers) {
    tr_message.Headers = message.headers;
  }
  if(message.attachments) {
    tr_message.Attachments = _.map(
      message.attachments,
      function (attachment) {
        return { Name: attachment.filename
               , Content: attachment.contents
               };
      }
    );
  }
  var post = 
    { uri: ("http" + (exports.SMTP.ssl ? "s" : "") + "://" + exports.SMTP.host +
            ":" + (exports.SMTP.ssl ? 443 : 80) + "/email")
    , method: "POST"
    , headers: postmark_headers
    , body: JSON.stringify(tr_message)
    };
  console.log(exports.SMTP)
  request(post,
    function (e,h,b) {
      if(e) {
        callback(e);
        return;
      }
      var body = JSON.parse(b);
      if (h.statusCode == 200) {
        callback(null,body);
      }
      else if (h.statusCode == 401) {
        callback(new Error(body.Message));
      } 
      else if (h.statusCode == 422) {
        callback(new Error(body.Message));
      } 
      else  {
        callback(new Error(body.Message));
      }
      return;
    }
  );
}

module.exports = exports;
exports.send_mail = send_mail;
exports.version = "0.0.1";
exports.path    = __dirname;