Mailspring/packages/isomorphic-core
Juan Tejada 00aa499365 [client-sync] Prevent duplicate accounts and sync workers
Summary:
After https://github.com/nylas/nylas-mail-all/commit/008cb4c, the shape of
account.connectionSettings changed, which means that ids for accounts
will also change, given that they are based on the connection settings (see
Account.hash()).

This is fine in most cases, except for accounts that were running on a
version of Nylas Mail before 008cb4c, then upgraded to a version
after 008cb4c, and then re-authed their account.
In this scenario, re-authing the account will create a second account with
a different `id` but with the same email address, along with an extra
sequelize database, and will start a second SyncWorker for the same
account. App-side, the `AccountStore` will correctly overwrite the first account,
so users would correctly see just 1 account in the sidebar. However, given
that 2 SyncWorkers would be running for the same account,
message ids would collide in edgehill.db and this would cause
threads to disappear from the ui as if they were being deleted.

To fix this, we need to do 2 things:

- Upon app start, we remove any duplicate accounts that might have been created due to this bug before starting any sync workers
- If we detect that we are going to create a duplicate account upon auth success, we delete the old account first. This will effectively cause sync to restart for the account.

Test Plan:
Verified problem: Checked out a commit before 008cb4c, authed an account, checked out master, re-authed account, verified that duplicate accounts are created.

Then test 2 scenarios:
- With duplicate accounts present, checked out this commit, verified that duplicate account would be removed and sync would function normally.
- With an account authed on a build before 008cb4c, checked out this commit, re-authed the account, and verified that duplicate account wouldn't be created

Reviewers: mark, halla, khamidou, spang

Reviewed By: spang

Subscribers: tomasz

Differential Revision: https://phab.nylas.com/D4425
2017-04-14 12:24:27 -07:00
..
spec [*] MessageFactory -> MessageUtils, SendUtils -> ModelUtils 2017-04-11 10:49:30 -07:00
src [client-sync] Prevent duplicate accounts and sync workers 2017-04-14 12:24:27 -07:00
index.js [isomorphic-core] Add missing .default to require 2017-04-11 11:09:39 -07:00
package.json [*] Revamp SSL options (including user-facing) 2017-04-05 17:49:43 -07:00
README.md [*] update and add READMEs to each package 2017-02-17 17:28:09 -08:00

Isomorphic Core

Isomorphic refers to javascript that can be run on both the client and the server.

This is shared code for mail and utilities that is designed to run both on deployed cloud servers and from within the Nylas Mail client.

Use through a regular import: import iso-core from 'isomorphic-core'

It is required as a dependency in the package.json of other modules.

This library isn't on the npm registry, but works as a dependency thanks to lerna bootstrap

See index.js for what gets explicitly exported by this library.

Important Usage Notes:

Since this code runs in both the client and the server, you must be careful with what libraries you use. Some common gotchas:

  • You can't use NylasEnv or NylasExports. These are injected only in the client.
  • If you require a 3rd party library, it must be added to the "dependencies" of isomorphic-core's package.json
  • You may use modern javascript syntax. Both the client and server get compiled with the same .babelrc setting