mailchimp.js

var Mailchimp = require('mailchimp-api-v3'),
    Promise = require('bluebird'),
    lo = require('lodash'),
    maxmind = require('maxmind');
md5 = require("md5");

module.exports = function (App, defaults) {
    function Chimp() {

    }

    Chimp.MailChimp = new Mailchimp(defaults.apikey);

    Chimp.subscribe = function (user, listId) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            if (!user.merge_fields) {
                user.merge_fields = {};
            }

            var settings = defaults,
                subscriber = {
                    email_address: user.email,
                    double_optin: defaults.double_optin || false,
                    status: 'subscribed',
                    timestamp_opt: new Date,
                    list_id: listId || defaults.defaultListId,
                    merge_fields: {
                        EMAIL: user.email,
                        FNAME: user.firstName || null,
                        LNAME: user.lastName || null
                    }
                };

            if (user.ip) {
                subscriber.ip_opt = user.ip;
                subscriber.merge_fields.optin_ip = user.ip;
            }

            subscriber.merge_fields = lo.merge(subscriber.merge_fields, user.merge_fields);

            _this.MailChimp.request({
                method: 'POST',
                path: '/lists/{list_id}/members',
                path_params: {
                    list_id: listId || defaults.defaultListId
                },
                body: subscriber,
                params: {}
            }, function (err, response) {
                if (err) {
                    return reject(err);
                }

                resolve(response);
            });

        });
    };

    Chimp.unsubscribe = function (email, listId) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            if (!email) { return reject(new Error("Email is required to unsubscribe")); }

            _this.MailChimp.request({
                method: 'DELETE',
                path: '/lists/{list_id}/members/{member_id}',
                path_params: {
                    list_id: listId || defaults.defaultListId,
                    member_id: md5(email.toLowerCase())
                },
                params: {}
            }, function (err, response) {
                if (err) {
                    return reject(err);
                }

                resolve(response);
            });
        });
    }

    return Chimp;
};