Update ck_subscriber_id Notice

admin/class-convertkit-admin-cache-plugins.php

@@ -58,6 +58,7 @@ public function maybe_configure_cache_plugins() {
 		$this->w3_total_cache();
 		$this->wp_fastest_cache();
 		$this->wp_optimize();
+		$this->wp_rocket();
 		$this->wp_super_cache();
 
 	}
@@ -284,6 +285,40 @@ public function wp_optimize() {
 
 	}
 
+	/**
+	 * Add a rule to WP Rocket to prevent caching when
+	 * the ck_subscriber_id cookie is present.
+	 *
+	 * @since   2.7.0
+	 */
+	public function wp_rocket() {
+
+		// Bail if the WP Rocket plugin is not active.
+		if ( ! is_plugin_active( 'wp-rocket/wp-rocket.php' ) ) {
+			return;
+		}
+
+		// Sanity check that we can access WP-Optimize's configuration class.
+		if ( ! function_exists( 'update_rocket_option' ) ) {
+			return;
+		}
+
+		// Fetch settings.
+		$settings = get_rocket_option( 'cache_reject_cookies', array() );
+
+		// If the cookie exception exists, no need to modify anything.
+		if ( in_array( $this->key, $settings, true ) ) {
+			return;
+		}
+
+		// Add cookie to exceptions.
+		$settings[] = $this->key;
+
+		// Update configuration to include excluding caching for the ck_subscriber_id cookie.
+		update_rocket_option( 'cache_reject_cookies', $settings );
+
+	}
+
 	/**
 	 * Show a notice in the WordPress Administration interface if
 	 * WP Super Cache is active, its caching enabled and no rule to disable caching

admin/class-convertkit-admin-settings-restrict-content.php

@@ -321,18 +321,6 @@ public function print_section_info() {
 
 		?>
 		<p class="description"><?php esc_html_e( 'Defines the text and button labels to display when a Page, Post or Custom Post has its Member Content setting defined.', 'convertkit' ); ?></p>
-		<div class="notice notice-warning">
-			<p>
-				<?php
-				printf(
-					'%s %s %s',
-					esc_html__( 'If your web host has caching configured (or you are using a caching plugin), you must configure it to disable caching when the', 'convertkit' ),
-					'<code>ck_subscriber_id</code>',
-					esc_html__( 'cookie is present. Failing to do so will result in errors.', 'convertkit' )
-				);
-				?>
-			</p>
-		</div>
 		<?php
 
 	}

tests/acceptance/restrict-content/general/RestrictContentCacheCest.php

@@ -259,6 +259,46 @@ public function testRestrictContentWPSuperCache(AcceptanceTester $I)
 		$I->deactivateThirdPartyPlugin($I, 'wp-super-cache');
 	}
 
+	/**
+	 * Tests that the WP RocketPlugin does not interfere with Restrict Content
+	 * output when a ck_subscriber_id cookie is present.
+	 *
+	 * @since   2.7.0
+	 *
+	 * @param   AcceptanceTester $I  Tester.
+	 */
+	public function testRestrictContentWPRocketCache(AcceptanceTester $I)
+	{
+		// Activate WP Rocket Plugin.
+		$I->activateThirdPartyPlugin($I, 'wp-rocket');
+
+		// Create Restricted Content Page.
+		$pageID = $I->createRestrictedContentPage(
+			$I,
+			[
+				'post_title'               => 'Kit: Restrict Content: Product: WP Rocket',
+				'restrict_content_setting' => 'product_' . $_ENV['CONVERTKIT_API_PRODUCT_ID'],
+			]
+		);
+
+		// Log out, so that caching is honored.
+		$I->logOut();
+
+		// Navigate to the page.
+		$I->amOnPage('?p=' . $pageID);
+
+		// Test that the restricted content CTA displays when no valid signed subscriber ID is used,
+		// to confirm caching does not show member-only content.
+		$I->testRestrictContentByProductHidesContentWithCTA($I);
+
+		// Test that the restricted content displays when a valid signed subscriber ID is used,
+		// to confirm caching does not show the incorrect content.
+		$I->testRestrictedContentShowsContentWithValidSubscriberID($I, $pageID);
+
+		// Deactivate WP Super Cache Plugin.
+		$I->deactivateThirdPartyPlugin($I, 'wp-rocket');
+	}
+
 	/**
 	 * Deactivate and reset Plugin(s) after each test, if the test passes.
 	 * We don't use _after, as this would provide a screenshot of the Plugin