routes.php

Route::get('authorize', array('before' => 'check-authorization-params|auth', function()
{
    // get the data from the check-authorization-params filter
    $params = Session::get('authorize-params');

    // get the user id
    $params['user_id'] = Auth::user()->id;

    // check if user already has authorized client for scopes
    $scopesAuthorized = Auth::user()->scopesAuthorizedByClientId($params['client_id']);

    $scopesNotAuthorized = array_diff(array_fetch($params['scopes'], 'scope'), $scopesAuthorized);

    if(sizeof($scopesNotAuthorized) == 0)
    {
        // all requested scopes have already been approved by the user -> skip the authorization dialog
    
        $code = AuthorizationServer::newAuthorizeRequest('user', $params['user_id'], $params);

        Session::forget('authorize-params');

        return Redirect::to(AuthorizationServer::makeRedirectWithCode($code, $params));
    }

    // display the authorization form
    return View::make('oauth.authorize', array('params' => $params));
}));

User.php

class User extends Eloquent implements UserInterface, RemindableInterface {
    
    // ...
  
    public function scopesAuthorizedByClientId($clientId)
    {
        $scopesAuthorized = array();

        $session = DB::table('oauth_sessions')
            ->where('client_id', $clientId)
            ->where('owner_type', 'user')
            ->where('owner_id', $this->id)
            ->first();

        if(!$session)
        {
            return $scopesAuthorized;
        }

        $accessToken = DB::table('oauth_session_access_tokens')
            ->where('session_id', $session->id)
            ->first();

        if(!$accessToken)
        {
            return $scopesAuthorized;
        }

        $scopes = DB::table('oauth_session_token_scopes')
            ->where('session_access_token_id', $accessToken->id)
            ->get();

        foreach($scopes as $scope)
        {
            $scopeData = DB::table('oauth_scopes')
                ->where('id', $scope->scope_id)
                ->first();

            if($scopeData)
            {
                $scopesAuthorized[]= $scopeData->scope;
            }
        }

        return $scopesAuthorized;
    }
    
    // ...
    
}