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<?php |
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namespace BFW; |
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use \DateTime; |
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use \Exception; |
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use \stdClass; |
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/** |
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* Class to manage html form |
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* Actuely, only manage token for form. |
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*/ |
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class Form |
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{ |
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/** |
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* @var string $formId The form id |
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*/ |
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protected $formId = ''; |
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/** |
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* Constructor |
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* Define form's id. |
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* |
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* @param string $formId The form id |
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*/ |
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public function __construct($formId) |
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{ |
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$this->formId = (string) $formId; |
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} |
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/** |
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* Save the form's token |
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* |
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* @param \stdClass $saveInfos Infos about token (id and expire time) |
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* |
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* @return void |
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*/ |
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protected function saveToken($saveInfos) |
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{ |
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//Default to session |
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$this->saveTokenInSession($saveInfos); |
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} |
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/** |
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* Save a token in php session |
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* |
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* @global array $_SESSION |
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* |
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* @param \stdClass $saveInfos Infos about token (id and expire time) |
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* |
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* @return void |
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*/ |
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protected function saveTokenInSession($saveInfos) |
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{ |
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global $_SESSION; |
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$_SESSION['token'][$this->formId] = $saveInfos; |
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} |
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/** |
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* Get the token informations |
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* |
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* @return \stdClass |
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*/ |
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protected function getToken() |
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{ |
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//Default from session |
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return $this->getTokenFromSession(); |
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} |
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/** |
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* Get a token from the session |
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* |
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* @global array $_SESSION |
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* |
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* @return \stdClass |
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* |
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* @throws Exception If there are no token |
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*/ |
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protected function getTokenFromSession() |
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{ |
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global $_SESSION; |
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if (!isset($_SESSION['token'])) { |
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throw new Exception('no token found'); |
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} |
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if (!isset($_SESSION['token'][$this->formId])) { |
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throw new Exception('no token found for form id '.$this->formId); |
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} |
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return $_SESSION['token'][$this->formId]; |
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} |
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/** |
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* Create a token for the form and return the token |
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* |
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* @return string |
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* |
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* @throws Exception If the form id is undefined |
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*/ |
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public function createToken() |
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{ |
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if (empty($this->formId)) { |
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throw new Exception('Form id is undefined.'); |
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} |
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$token = uniqid(rand(), true); |
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$datetime = new DateTime; |
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$saveInfos = new stdClass; |
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$saveInfos->token = $token; |
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$saveInfos->date = $datetime; |
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$this->saveToken($saveInfos); |
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return $token; |
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} |
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/** |
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* Check the token receive with the generated token |
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* |
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* @param string $tokenToCheck The token receive from user |
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* @param int $timeExp (default 15) time on minute which the token is valid |
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* |
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* @return boolean |
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*/ |
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public function checkToken($tokenToCheck, $timeExp = 15) |
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{ |
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//Throw Exception |
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$tokenInfos = $this->getToken(); |
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$token = $tokenInfos->token; |
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$dateCreate = $tokenInfos->date; |
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if ($token !== $tokenToCheck) { |
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return false; |
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} |
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$limitDate = new DateTime; |
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$limitDate->modify('-'.(int) $timeExp.' minutes'); |
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if ($dateCreate < $limitDate) { |
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return false; |
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} |
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unset($_SESSION['token'][$this->formId]); |
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return true; |
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} |
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/** |
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151
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* Check if the form has a token |
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* |
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153
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* @return boolean |
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*/ |
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public function hasToken() |
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{ |
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try { |
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$this->getToken(); |
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} catch (Exception $e) { |
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return false; |
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} |
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return true; |
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} |
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} |
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bfw-systems /
bfw
