installed plugin Easy Digital Downloads version 3.1.0.3

wp-content/plugins/easy-digital-downloads/includes/gateways/paypal/class-token.php

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+<?php
+/**
+ * PayPal REST API Token
+ *
+ * @package    easy-digital-downloads
+ * @subpackage Gateways\PayPal
+ * @copyright  Copyright (c) 2021, Sandhills Development, LLC
+ * @license    GPL2+
+ */
+
+namespace EDD\Gateways\PayPal;
+
+class Token {
+
+	/**
+	 * Token object
+	 *
+	 * @var object
+	 */
+	private $token_object;
+
+	/**
+	 * Token constructor.
+	 *
+	 * @param $token_object
+	 *
+	 * @throws \RuntimeException
+	 */
+	public function __construct( $token_object ) {
+		if ( is_object( $token_object ) && ! isset( $token_object->created ) ) {
+			$token_object->created = time();
+		}
+
+		if ( ! $this->is_valid( $token_object ) ) {
+			throw new \RuntimeException( __( 'Invalid token.', 'easy-digital-downloads' ) );
+		}
+
+		$this->token_object = $token_object;
+	}
+
+	/**
+	 * Creates a new token from a JSON string.
+	 *
+	 * @param string $json
+	 *
+	 * @return Token
+	 * @throws \Exception
+	 */
+	public static function from_json( $json ) {
+		return new Token( json_decode( $json ) );
+	}
+
+	/**
+	 * Returns the token object as a JSON string.
+	 *
+	 * @since 2.11
+	 * @return string|false
+	 */
+	public function to_json() {
+		return json_encode( $this->token_object );
+	}
+
+	/**
+	 * Determines whether or not the token has expired.
+	 *
+	 * @since 2.11
+	 * @return bool
+	 */
+	public function is_expired() {
+		// Regenerate tokens 10 minutes early, just in case.
+		$expires_in = $this->token_object->expires_in - ( 10 * MINUTE_IN_SECONDS );
+
+		return time() > $this->token_object->created + $expires_in;
+	}
+
+	/**
+	 * Returns the access token.
+	 *
+	 * @since 2.11
+	 * @return string
+	 */
+	public function token() {
+		return $this->token_object->access_token;
+	}
+
+	/**
+	 * Determines whether or not we have a valid token object.
+	 * Note: This does not check the _expiration_ of the token, just validates that the expected
+	 * data is _present_.
+	 *
+	 * @param object $token_object
+	 *
+	 * @since 2.11
+	 * @return bool
+	 */
+	private function is_valid( $token_object ) {
+		$required_properties = array(
+			'created',
+			'access_token',
+			'expires_in'
+		);
+
+		foreach ( $required_properties as $property ) {
+			if ( ! isset( $token_object->{$property} ) ) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+}