/**
* Retrieves an access token for the given authorization code
* (previously generated from www.linkedin.com on behalf of
* a specific user). The authorization code is sent to www.linkedin.com
* and a legitimate access token is generated provided the access token
* and the user for which it was generated all match, and the user is
* either logged in to LinkedIn or has granted an offline access permission.
*
* @param string $code An authorization code.
* @param string $redirectUri Where the user should be redirected after token is generated.
* Default is the current url
*
* @return AccessToken|null An access token exchanged for the authorization code, or
* null if an access token could not be generated.
*/
protected function getAccessTokenFromCode($code, $redirectUri = null)
{
if (empty($code)) {
return;
}
if ($redirectUri === null) {
$redirectUri = $this->getUrlGenerator()->getCurrentUrl();
}
try {
$response = $this->getRequest()->send('POST', $this->getUrlGenerator()->getUrl('www', 'uas/oauth2/accessToken'), ['body' => array('grant_type' => 'authorization_code', 'code' => $code, 'redirect_uri' => $redirectUri, 'client_id' => $this->getAppId(), 'client_secret' => $this->getAppSecret())]);
} catch (LinkedInApiException $e) {
// most likely that user very recently revoked authorization.
// In any event, we don't have an access token, so say so.
return;
}
if (empty($response)) {
return;
}
$tokenData = array_merge(array('access_token' => null, 'expires_in' => null), $response);
$token = new AccessToken($tokenData['access_token'], $tokenData['expires_in']);
if (!$token->hasToken()) {
return;
}
return $token;
}
