email.js

var mandrill = require('mandrill-api/mandrill'),
	async 	 = require('async'),
	User 	 = require('../../models').User;



module.exports = function (apiKey, lang) {
	// setup mandrill api
	var mandrill_client = new mandrill.Mandrill(apiKey);



	function sendEmail (user_id, entry_id) {
		async.waterfall([
		    function (callback) {
		    	// Find user record based on provided user id
		        User.findById(user_id, function (err, user) {
					
					console.log('--- Email: findUser - user_id:' + user_id);
	
		        	callback(err, user);
		        });
		    },
		    function (user, callback) {
		    	// if no user is found then return error
		    	if (!user) return callback(new Error('no user found!'), null);
		    	
		    	var templateName = lang == 'fr' ? 
		    							   'sunlight-winner-confirmation-fr' : 
		    							   'sunlight-winner-confirmation';

		        // get html email template
		        mandrill_client.templates.info({'name': templateName}, function (template) {
				    
					console.log('--- Email: findEmailTemplate: sunlight-winner-confirmation', templateName, lang);

				    callback(null, user, template);

				}, function(err) {
				    // Mandrill returns the error as an object with name and message keys
				    callback(err, null);
				});
		    },
		    function (user, template, callback) {
		        // FINALLY send this mofo email!!
		        var message = getEmailMessage(user, entry_id, template);
				mandrill_client.messages.send({"message": message, "async": false}, function (result) {
		    		
		    		console.log('--- Email: SendEmail: - result: ', result);

		    		callback(null, result);

				}, function(e) {
		    		// Mandrill returns the error as an object with name and message keys
				    callback(err, null);
				});
		    }
		], function (err, result) {
			if (err) {
				console.log('--- Email: - Error: ', err);	
				return false;
			}

			return result;
		});
	};
	
	
	
	function getEmailMessage (user, entry_id, template) {
		// assemble message object
		// see https://mandrillapp.com/api/docs/messages.nodejs.html
		var message = {
		    "html": template.code,
		    "text": template.text,
		    "subject": template.subject,
		    "from_email": template.from_email,
		    "from_name": template.from_name,
		    "to": [{
		            "email": user.decrypt.email,
		            "name": user.fullname,
		            "type": "to"
		    }],
		    "important": false,
		    "track_opens": true,
		    "track_clicks": null,
		    "inline_css": true,
		    "tracking_domain": null,
		    "signing_domain": null,
		    "return_path_domain": null,
		    "recipient_metadata": null,
		    "images": null,
		    "recipient_metadata": [{
	            "rcpt": user.decrypt.email,
	            "values": {
	                "user_id": user.id,
	                "name": user.fullname,
	                "entry_id": entry_id
	            }
	        }],
		};
	
		return message;
	};

	return {
		sendEmail: sendEmail
	}
};