Merge pull request #8 from alleyinteractive/feature/caching-enabled-u…

…pdate

Check if caching is enabled after boot

src/features/class-full-page-cache-404.php

@@ -85,6 +85,15 @@ public static function get_stale_cache_time(): int {
 		return apply_filters( 'wp_404_caching_stale_cache_time', self::DEFAULT_STALE_CACHE_TIME ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound
 	}
 
+	/**
+	 * Check if caching is enabled.
+	 *
+	 * @return bool
+	 */
+	public static function caching_enabled(): bool {
+		return apply_filters( 'wp_404_caching_enabled', true ); // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound
+	}
+
 	/**
 	 * Boot the feature.
 	 */
@@ -101,10 +110,6 @@ public function boot(): void {
 			return;
 		}
 
-		if ( ! apply_filters( 'wp_404_caching_enabled', true ) ) { // phpcs:ignore WordPress.NamingConventions.PrefixAllGlobals.NonPrefixedHooknameFound
-			return;
-		}
-
 		// Return 404 page cache on template_redirect.
 		add_action( 'template_redirect', [ self::class, 'action__template_redirect' ], 1 );
 
@@ -126,6 +131,10 @@ public function boot(): void {
 	 */
 	public static function action__template_redirect(): void {
 
+		if ( ! self::caching_enabled() ) {
+			return;
+		}
+
 		// Don't cache if not a 404.
 		if ( ! is_404() ) {
 			return;
@@ -212,6 +221,10 @@ public static function send_header( string $type, bool $stale = false ): void {
 	 * @global WP_Query $wp_query WordPress database access object.
 	 */
 	public static function action__wp(): void {
+		if ( ! self::caching_enabled() ) {
+			return;
+		}
+
 		if ( isset( $_SERVER['REQUEST_URI'] ) && self::TEMPLATE_GENERATOR_URI === $_SERVER['REQUEST_URI'] ) {
 			global $wp_query;
 
@@ -319,6 +332,10 @@ public static function prepare_response( string $content ): string {
 	 * Spin up a request to the guaranteed 404 page to populate the cache.
 	 */
 	public static function trigger_404_page_cache(): void {
+		if ( ! self::caching_enabled() ) {
+			return;
+		}
+
 		$url = home_url( self::TEMPLATE_GENERATOR_URI, 'https' );
 
 		// Replace http with https to ensure the styles don't get blocked due to insecure content.