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wp-content/plugins/wordpress-seo/admin/class-gutenberg-compatibility.php

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+<?php
+/**
+ * WPSEO plugin file.
+ *
+ * @package WPSEO\Gutenberg_Compatibility
+ */
+
+/**
+ * Class WPSEO_Gutenberg_Compatibility
+ */
+class WPSEO_Gutenberg_Compatibility {
+
+	/**
+	 * The currently released version of Gutenberg.
+	 *
+	 * @var string
+	 */
+	const CURRENT_RELEASE = '16.4.0';
+
+	/**
+	 * The minimally supported version of Gutenberg by the plugin.
+	 *
+	 * @var string
+	 */
+	const MINIMUM_SUPPORTED = '16.4.0';
+
+	/**
+	 * Holds the current version.
+	 *
+	 * @var string
+	 */
+	protected $current_version = '';
+
+	/**
+	 * WPSEO_Gutenberg_Compatibility constructor.
+	 */
+	public function __construct() {
+		$this->current_version = $this->detect_installed_gutenberg_version();
+	}
+
+	/**
+	 * Determines whether or not Gutenberg is installed.
+	 *
+	 * @return bool Whether or not Gutenberg is installed.
+	 */
+	public function is_installed() {
+		return $this->current_version !== '';
+	}
+
+	/**
+	 * Determines whether or not the currently installed version of Gutenberg is below the minimum supported version.
+	 *
+	 * @return bool True if the currently installed version is below the minimum supported version. False otherwise.
+	 */
+	public function is_below_minimum() {
+		return version_compare( $this->current_version, $this->get_minimum_supported_version(), '<' );
+	}
+
+	/**
+	 * Gets the currently installed version.
+	 *
+	 * @return string The currently installed version.
+	 */
+	public function get_installed_version() {
+		return $this->current_version;
+	}
+
+	/**
+	 * Determines whether or not the currently installed version of Gutenberg is the latest, fully compatible version.
+	 *
+	 * @return bool Whether or not the currently installed version is fully compatible.
+	 */
+	public function is_fully_compatible() {
+		return version_compare( $this->current_version, $this->get_latest_release(), '>=' );
+	}
+
+	/**
+	 * Gets the latest released version of Gutenberg.
+	 *
+	 * @return string The latest release.
+	 */
+	protected function get_latest_release() {
+		return self::CURRENT_RELEASE;
+	}
+
+	/**
+	 * Gets the minimum supported version of Gutenberg.
+	 *
+	 * @return string The minumum supported release.
+	 */
+	protected function get_minimum_supported_version() {
+		return self::MINIMUM_SUPPORTED;
+	}
+
+	/**
+	 * Detects the currently installed Gutenberg version.
+	 *
+	 * @return string The currently installed Gutenberg version. Empty if the version couldn't be detected.
+	 */
+	protected function detect_installed_gutenberg_version() {
+		if ( defined( 'GUTENBERG_VERSION' ) ) {
+			return GUTENBERG_VERSION;
+		}
+
+		return '';
+	}
+}