/**
* Load token object, validate it depending on request type, set access data and save
*
* @return Mage_Oauth_Model_Server
* @throws Mage_Oauth_Exception
*/
protected function _initToken()
{
$this->_token = Mage::getModel('oauth/token');
if (self::REQUEST_INITIATE != $this->_requestType) {
$this->_validateTokenParam();
$this->_token->load($this->_protocolParams['oauth_token'], 'token');
if (!$this->_token->getId()) {
$this->_throwException('', self::ERR_TOKEN_REJECTED);
}
if (self::REQUEST_TOKEN == $this->_requestType) {
$this->_validateVerifierParam();
if ($this->_token->getVerifier() != $this->_protocolParams['oauth_verifier']) {
$this->_throwException('', self::ERR_VERIFIER_INVALID);
}
if ($this->_token->getConsumerId() != $this->_consumer->getId()) {
$this->_throwException('', self::ERR_TOKEN_REJECTED);
}
if (Mage_Oauth_Model_Token::TYPE_REQUEST != $this->_token->getType()) {
$this->_throwException('', self::ERR_TOKEN_USED);
}
} elseif (self::REQUEST_AUTHORIZE == $this->_requestType) {
if ($this->_token->getAuthorized()) {
$this->_throwException('', self::ERR_TOKEN_USED);
}
} elseif (self::REQUEST_RESOURCE == $this->_requestType) {
if (Mage_Oauth_Model_Token::TYPE_ACCESS != $this->_token->getType()) {
$this->_throwException('', self::ERR_TOKEN_REJECTED);
}
if ($this->_token->getRevoked()) {
$this->_throwException('', self::ERR_TOKEN_REVOKED);
}
if ($this->_token->getConsumerId() != $this->_consumer->getId()) {
$this->_throwException('', self::ERR_TOKEN_REJECTED);
}
//TODO: Implement check for expiration (after it implemented in token model)
}
} else {
$this->_validateCallbackUrlParam();
}
return $this;
}
