fatvegan

This is something of a hack, but it is pretty quick and easy. I've never used Smarty before, but it's pretty flexible (and slightly evil).

I put this in a Hero template called authenticate.thtml and mapped it to /authenticate. I installed the jsConnect module for Vanilla, set the secret and it was basically done. Seems to work for regular and embedded forums.

{strip}
{assign var=secret value='985d2f9eb57a8b55db3c04c20272bce9308764b0'}
{assign var=client_id value=$smarty.get.client_id}
{assign var=callback value=$smarty.get.callback}

{if $logged_in}
  {assign var=member value=['uniqueid'=>$member.id,'name'=>$member.first_name|cat:' '|cat:$member.last_name, 'email'=>$member.email, 'roles'=>'member']}
  {assign var=empty value=ksort($member)}

  {$member['signature'] = $member|@http_build_query|cat:$secret|@sha1}

  {$member['client_id'] = $client_id}
{else}
  {assign var=member value=['name'=>'', 'photourl'=>'']}
{/if}

{$callback}({$member|@json_encode})
{/strip}