Added autoRefreshSettings config option

src/OAuth/Client.php

@@ -39,6 +39,11 @@ class Client {
  */
  protected $config = [];
 
+ /**
+ * @var int
+ */
+ var $lastRefreshAttempt = null;
+
  /**
  * Create a new instance of Client.
  *
@@ -123,13 +128,69 @@ public function __call($method, $args) {
  $response = $e->getResponse();
  $body = json_decode($response->getBody(), false);
  $status_code = $response->getStatusCode();
+
  if($status_code == 404 && !($this->config['404_error'] ?? false)) {
  $response = new \stdClass;
  $response->uri = $uri;
  $response->error = "{$body->error}";
  $response->code = $status_code;
  return $response;
  }
+
+ if (
+ $status_code == 401 &&
+ $body->error == "invalid_token" &&
+ isset( $this->config["autoRefreshSettings"] )
+ ) {
+
+ /* let's only make an attempt if it's been at least one minute since the last attempt.
+ * If it's been less than a minute, chances are we just refreshed, and it *seemed* to
+ * work fine, but then our recursive call failed with another 401. It's unlikely that
+ * such an event will occur, which means that it will definitely occur. If we don't
+ * put some kind of check here, we could end up making infinite recursive calls.
+ */
+ if (
+ !$this->lastRefreshAttempt ||
+ time() - $this->lastRefreshAttempt > 60
+ ) {
+
+ $this->lastRefreshAttempt = time();
+
+ /* 2023-04-07: refreshAccessToken either works, or errors out. So checking for a valid
+ * response isn't all that useful, and we can never call a provided onFail function.
+ * But let's do it anyway in case refreshAccessToken is ever modified to handle errors differently
+ */
+ $response = $this->refreshAccessToken( $this->config["autoRefreshSettings"]["refreshToken"] );
+
+ if (
+ $response &&
+ isset( $response["access_token"] ) &&
+ isset( $response["refresh_token"] )
+ ) {
+ // success
+ $this->setApiKey( $response["access_token"] );
+
+ if (
+ isset( $this->config["autoRefreshSettings"]["onSuccess"] ) &&
+ is_callable( $this->config["autoRefreshSettings"]["onSuccess"] )
+ ) {
+ $this->config["autoRefreshSettings"]["onSuccess"]($response);
+ }
+
+ // ok let's make a recursive call
+ return $this->__call( $method, $args );
+ } else {
+ // failure
+ if (
+ isset( $this->config["autoRefreshSettings"]["onFail"] ) &&
+ is_callable( $this->config["autoRefreshSettings"]["onFail"] )
+ ) {
+ $this->config["autoRefreshSettings"]["onFail"]($response);
+ }
+ }
+ }
+ }
+
  throw new RequestException(
  "Received HTTP status code [$status_code] with error \"{$body->error}\"."
  );