mailchimp-app/mc-mdw.js

A Mailchimp express sub-app to mount on any project, for easy integration

		
	var MC = require('./mc-api');
	var Mailchimp;

	module.exports = function( config, opts ){

		opts = opts || {};

		if( opts.logger ){
			config = Object.assign( {}, config, { logger: opts.logger });
		}
		
		Mailchimp = new MC( config );

		return {
			handle: handle,
			authorize: authorize,
			prepareRequest: prepareRequest
		};

	}

	function prepareRequest( req, res, next ){

		req.sent = Object.assign( {}, req.query, req.body );
		next();

	}

	function authorize( config ){

		return function( req, res, next ){

			var action = [ req.method, req.url ].join(' ');
			var private_routes = [ /GET \/users?/ ];
			var err;

			config.private_routes.forEach(function( rgx ){
				if( rgx.test( action ) && req.sent.secret != config.secret ){
					err = {
						err_id  : 'unauthorized',
						message : 'The ressource you are trying to access is protected',
						status  : 403 // important :) 
					};
				}
			});
			
			err ? next( err ) : next();

		}

	}

 	function handle( method, opts ){

	 	opts = opts || {};

	 	if( method == "error" ){
	 		return handleErr;
	 	}

 		return function( req, res, next ){

 			var handleFn;
 			if( method == "hello" ){
 				handleFn = sayHello;
 			}

 			if( method == "goodbye" ){
 				handleFn = sayGoodbye;
 			}

 			if( method == "subscribe" ){
 				console.log("yeah");
 				handleFn = subscribeMember;
 			}

 			if( method == "get_user" ){
 				handleFn = getUser;
 			}

 			if( method == "list_users" ){
 				handleFn = listUsers;
 			}

 			if( method == "update" ){
 				handleFn = updateMember;
 			}

 			if( method == "delete" ){
 				handleFn = deleteMember;
 			}

 			if( method == "end" ){
 				handleFn = endRequest;
 			}

 			Mailchimp.log.info("Handling method " + method);
 			
 			handleFn( req, res, next );

 		}
	}

	function sayHello( req, res, next ){
		res.json({ "hello": "mailchimp" });
	}

	function sayGoodbye( req, res, next ){
		
		next({
			err_id: "goodbye_mc",
			message: "Cant parse the request ! (test error)"
		});

	}

	function subscribeMember( req, res, next ){

		var email_address = req.sent.email_address;

		Mailchimp.log.info("Subscribing user with email address : " + email_address );
		if( !Mailchimp.isEmail( email_address ) ){
			Mailchimp.log.warn("The email seems wrong !");

			return next({
				message : "The email address provided doesnt look like one",
				err_id  : "bad_address_email",
				meta: {
					email_address: email_address
				}
			});

		}

		Mailchimp.createMember( req.sent )
			.then(function( member ){
				Mailchimp.log.success(`New member ${member.email_address} successfully created with id ${member.id}`);
				res.json( member );
			}).catch( next );

	}

	function updateMember( req, res, next ){

		var mcid = req.params.mailchimp_id;
		Mailchimp.log.info(`Updating member with id ${mcid}`);
		Mailchimp.updateMember( mcid, req.sent )
			.then(function( member ){
				Mailchimp.log.success(`Member ${member.id} (${member.email_address}) successfully updated`);
				res.json( member );
			}).catch( next );

	}


	function getUser( req, res, next ){

		Mailchimp.getMember( req.params.mailchimp_id )
			.then(function( member ){
				res.json( member );
			}).catch( next );

	}

	function listUsers( req, res, next ){

		var fields = req.sent.fields;
		if( typeof fields == "string" ){
			fields = fields.split(',');
		}

		Mailchimp.getMembers( fields )
			.then(function( members ){
				res.json( members );
			}).catch( next );
	}

	function deleteMember( req, res, next ){

	}

	function handleErr( err, req, res, next ){

		if( !err.err_id ){
			res.status( 500 ).json({ message: "Internal error | service unavailable" });
			return next( err );
		}

		Mailchimp.log.error( err );
		res.status( err.status || 400 )
		   .json( err );


	}

	function endRequest( req, res, next ){

		res.status('404').json({
			message: "The request didnt match any existing route"
		});

	}