= Support for OpenID =

The goal is to let users attach to projects using OpenID.

== Interface ==

 * On the "identify your account" page of the Attach Project wizard,
   add a "Log in with OpenID" button.
 * Selecting this opens a web browser window.
 * User sees a page on project site listing OpenID providers (Google, Facebook, etc.).
   User clicks one.
 * The user sees the provider's login page.
   Depending on the provider, they may see
   "OK to send email addr to (project URL)?"
 * On successful login, user sees Welcome page on project site
 * Wizard shows Done page

== Implementation ==

DB table
 * openid_login.
   fields: nonce, status

Project PHP pages

 * '''openid_login.php''':
  Manager goes here.
  It takes a nonce ID as an arg.
  It creates an openid_login record.
  Shows list of links to OpenID providers.
 * '''openid_callback.php''':
  Called by OpenID provider.
  Takes nonce ID as arg.
  Creates user record if needed.
  Displays status to user.
  Updates status field of openid_login record.
 * '''openid_poll.php''':
  Web RPC called by client.
  Takes nonce ID as arg.
  Returns status.

GUI RPCs

 * '''openid_poll(url, nonce)''':
  initiate call to openid_poll.php
 * '''openid_poll_poll(status)''':
  poll for completion

Manager

 If user selects OpenID login:
 * create nonce ID, open browser to openid_login.php
 * show "communication with project" page
 * call openid_poll() and openid_poll_poll()
  until get status other than PENDING
 * show success or failure