Merged in feature/MAW-855-import-code-into-aws (pull request #2)

code import from pantheon

* code import from pantheon

wp/wp-content/plugins/wordpress-seo-premium/src/helpers/version-helper.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Yoast\WP\SEO\Premium\Helpers;
+
+use Yoast\WP\SEO\Premium\Addon_Installer;
+
+/**
+ * Helper class to check the status of the Free and Premium versions.
+ */
+class Version_Helper {
+
+	/**
+	 * Checks whether Free is active and set to a version later than the minimum required.
+	 *
+	 * @return bool
+	 */
+	public function is_free_upgraded() {
+		return ( \defined( 'WPSEO_VERSION' ) && \version_compare( \WPSEO_VERSION, Addon_Installer::MINIMUM_YOAST_SEO_VERSION . '-RC0', '>' ) );
+	}
+
+	/**
+	 * Checks whether a new update is available for Premium.
+	 *
+	 * @return bool
+	 */
+	public function is_premium_update_available() {
+		$plugin_updates = \get_plugin_updates();
+		return isset( $plugin_updates[ WPSEO_PREMIUM_BASENAME ] );
+	}
+}