splendido:accounts-meld with mantra-sample-blog-app

meteor-mantra-meld.js

/**
 * Get `splendido:accounts-meld` working with the Mantra sample Blog App
 * 
 * Create a file that looks something like this in your `/server`
 * 
 * Caveat: No guarantees, negligible support, YMMV. If you have a better way, let me know.
 */

import {Meteor} from 'meteor/meteor';
import _ from 'lodash';

/**
 * AccountsMeld config
 * 
 * Add your config as you would normally.
 */
AccountsMeld.configure({
	// ...
});

/**
 * `checkForMelds` doesn't seem accessible.  Created a replacement that also works with Astronomy which adds a bunch of 
 * helper attributes and functions which cause issues during the `queryFields` filter section (see comments later).
 * 
 * Only relevant bits have been included here for annotation purposes, but basically take a copy of the original function 
 * and make the changes prefixed with `ADD` in the comments.
 */
export const doMeld = function(dstUser) {
	/**
	 * ADD: Astronomy by default adds a transform to collection queries. Refetch the user object without the transform so
	 * that it is usable as a plain JSON object. Add this to the top of the function.
	 */
	dstUser = Meteor.users.findOne({_id: dstUser._id}, { transform: null });

	// ...

	// Picks up verified email addresses and creates a list like
	// [
	//    {$elemMatch: {"address": addr1, "verified": true}},
	//    {$elemMatch: {"address": addr2, "verified": true}},
	//    ...
	// ]
	
	// That bit above is one of splendido's annotations.  With Astronomy, the `email` part on line 56 is also going to have 
	// all of Astronomy's helper fields. So your query will always return empty. That's why you need the `findOne` without 
	// a transform.
	
	var queryEmails = _.chain(dstUser.registered_emails)
			.filter(function(email) {
				return email.verified;
			})
			.map(function(email) {
				// Works around Astronomy's transform
				return {
					"registered_emails": {
						$elemMatch: email
					}
				};
			})
			.value();
		
	// ...
	
	/**
	 * ADD: Update the query to remove the transform here as well. Otherwise when the objects are used later you'll 
	 * end up with Astronomy's helper fields in mongo as well.
	 */
	var users = Meteor.users.find(queryEmails, { transform: null });
		
	// ...
};

/**
 * **Note:** If you have an `Accounts.onLogin` somewhere else, you can include this in there, or just leave this here. 
 * I don't remember if this is one of the events you can attach callbacks to more than once.
 * 
 * If you put this in another file, you may have to add:
 * `import {doMeld} from './path/to/the/above/file';
 */
Accounts.onLogin(function(attempt) {
 	/**
 	 * This event fires not just on login but on page reload. Leave the `attempt.type` check if you want to limit melds to 
 	 * just when an actual login occurs.
 	 */
	if (attempt.type !== 'resume') {
		doMeld(attempt.user);
	}
});