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<?php |
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namespace Helix\Site; |
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use ArrayAccess; |
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use Helix\Site; |
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/** |
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* The session. |
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*/ |
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class Session implements ArrayAccess |
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{ |
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/** |
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* @var Site |
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*/ |
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protected $site; |
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/** |
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* Starts the session and initializes the CSRF token. |
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* |
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* @param Site $site |
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*/ |
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public function __construct(Site $site) |
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{ |
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$this->site = $site; |
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session_set_cookie_params(0, '/', null, !$site->isDev(), true); |
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session_start(); |
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$_SESSION['__csrf'] ??= bin2hex(random_bytes(8)); |
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} |
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/** |
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* @return string |
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*/ |
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public function getToken(): string |
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{ |
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return $_SESSION['__csrf']; |
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} |
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/** |
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* Returns the stored user, or `null`. |
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* |
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* @return mixed |
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*/ |
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public function getUser() |
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{ |
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return $_SESSION['__user'] ?? null; |
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} |
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/** |
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* Wipes the session. |
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*/ |
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public function logout(): void |
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{ |
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setcookie(session_name(), null, 1); |
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session_destroy(); |
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} |
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/** |
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* @param mixed $offset |
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* @return bool |
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*/ |
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public function offsetExists($offset): bool |
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{ |
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return isset($_SESSION[$offset]); |
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} |
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/** |
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* @param mixed $offset |
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* @return mixed Coalesces to `null` |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $_SESSION[$offset] ?? null; |
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} |
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/** |
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* @param mixed $offset |
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* @param mixed $value |
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*/ |
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public function offsetSet($offset, $value): void |
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{ |
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$_SESSION[$offset] = $value; |
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} |
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/** |
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* @param mixed $offset |
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*/ |
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public function offsetUnset($offset): void |
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{ |
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unset($_SESSION[$offset]); |
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} |
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/** |
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* Sets the user (logs them in). |
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* |
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* @param mixed $user |
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* @return $this |
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*/ |
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public function setUser($user) |
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{ |
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$_SESSION['__user'] = $user; |
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return $this; |
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} |
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/** |
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* Checks the given CSRF token against what we expect. |
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* |
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* If they don't match, a `403` is logged and thrown. |
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* |
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* @param $token |
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* @return $this |
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* @throws HttpError |
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*/ |
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public function verify($token) |
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{ |
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if ($token !== $this->getToken()) { |
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$this->site->log(403, 'Invalid CSRF token.'); |
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throw new HttpError(403, 'Invalid CSRF token.'); |
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} |
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return $this; |
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} |
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} |
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hfw /
site
