JITM: Sideload Jetpack Boost functionality

projects/packages/jitm/changelog/add-jitm-sideload-boost-plugin

@@ -0,0 +1,4 @@
+Significance: minor
+Type: added
+
+JITM: Added ability to sideload Jetpack Boost plugin.

projects/packages/jitm/src/class-post-connection-jitm.php

@@ -195,6 +195,40 @@ public static function jitm_jetpack_backup_activate() {
 		);
 	}
 
+	/**
+	 * A special filter used in the CTA of a JITM offering to install the Jetpack Boost plugin.
+	 *
+	 * @return string The new CTA
+	 */
+	public static function jitm_jetpack_boost_install() {
+		return wp_nonce_url(
+			add_query_arg(
+				array(
+					'jetpack-boost-action' => 'install',
+				),
+				admin_url( 'admin.php?page=jetpack' )
+			),
+			'jetpack-boost-install'
+		);
+	}
+
+	/**
+	 * A special filter used in the CTA of a JITM offering to activate the Jetpack Boost plugin.
+	 *
+	 * @return string The new CTA
+	 */
+	public static function jitm_jetpack_boost_activate() {
+		return wp_nonce_url(
+			add_query_arg(
+				array(
+					'jetpack-boost-action' => 'activate',
+				),
+				admin_url( 'admin.php?page=jetpack' )
+			),
+			'jetpack-boost-install'
+		);
+	}
+
 	/**
 	 * This is an entire admin notice dedicated to messaging and handling of the case where a user is trying to delete
 	 * the connection owner.
@@ -404,6 +438,10 @@ public function get_messages( $message_path, $query, $full_jp_logo_exists ) {
 		add_filter( 'jitm_jetpack_backup_install', array( $this, 'jitm_jetpack_backup_install' ) );
 		add_filter( 'jitm_jetpack_backup_activate', array( $this, 'jitm_jetpack_backup_activate' ) );
 
+		// Jetpack Boost.
+		add_filter( 'jitm_jetpack_boost_install', array( $this, 'jitm_jetpack_boost_install' ) );
+		add_filter( 'jitm_jetpack_boost_activate', array( $this, 'jitm_jetpack_boost_activate' ) );
+
 		$user = wp_get_current_user();
 
 		// Unauthenticated or invalid requests just bail.

projects/plugins/jetpack/3rd-party/3rd-party.php

@@ -25,6 +25,7 @@ function load_3rd_party() {
 		'class-jetpack-modules-overrides.php', // Special case. Tools to be used to override module settings.
 		'creative-mail.php',
 		'jetpack-backup.php',
+		'jetpack-boost.php',
 		'debug-bar.php',
 		'class-domain-mapping.php',
 		'crowdsignal.php',

projects/plugins/jetpack/3rd-party/jetpack-boost.php

@@ -0,0 +1,105 @@
+<?php
+/**
+ * Compatibility functions for the Jetpack Boost plugin.
+ * https://wordpress.org/plugins/jetpack-boost/
+ *
+ * @since 10.4
+ *
+ * @package automattic/jetpack
+ */
+
+namespace Automattic\Jetpack\Jetpack_Boost;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+const PLUGIN_SLUG = 'jetpack-boost';
+const PLUGIN_FILE = 'jetpack-boost/jetpack-boost.php';
+
+add_action( 'admin_notices', __NAMESPACE__ . '\error_notice' );
+add_action( 'admin_init', __NAMESPACE__ . '\try_install' );
+
+/**
+ * Verify the intent to install Jetpack Boost, and kick off installation.
+ *
+ * This works in tandem with a JITM set up in the JITM package.
+ */
+function try_install() {
+	if ( ! isset( $_GET['jetpack-boost-action'] ) ) {
+		return;
+	}
+
+	check_admin_referer( 'jetpack-boost-install' );
+
+	$result = false;
+	// If the plugin install fails, redirect to plugin install page pre-populated with jetpack-boost search term.
+	$redirect_on_error = admin_url( 'plugin-install.php?s=jetpack-boost&tab=search&type=term' );
+
+	// Attempt to install and activate the plugin.
+	if ( current_user_can( 'activate_plugins' ) ) {
+		switch ( $_GET['jetpack-boost-action'] ) {
+			case 'install':
+				$result = install_and_activate();
+				break;
+			case 'activate':
+				$result = activate();
+				break;
+		}
+	}
+
+	if ( $result ) {
+		/** This action is already documented in _inc/lib/class.core-rest-api-endpoints.php */
+		do_action( 'jetpack_activated_plugin', PLUGIN_FILE, 'jitm' );
+		$redirect = admin_url( 'admin.php?page=jetpack-boost' );
+	} else {
+		$redirect = add_query_arg( 'jetpack-boost-install-error', true, $redirect_on_error );
+	}
+
+	wp_safe_redirect( $redirect );
+
+	exit;
+}
+
+/**
+ * Install and activate the Jetpack Boost plugin.
+ *
+ * @return bool result of installation
+ */
+function install_and_activate() {
+	jetpack_require_lib( 'plugins' );
+	$result = \Jetpack_Plugins::install_and_activate_plugin( PLUGIN_SLUG );
+
+	if ( is_wp_error( $result ) ) {
+		return false;
+	} else {
+		return true;
+	}
+}
+
+/**
+ * Activate the Jetpack Boost plugin.
+ *
+ * @return bool result of activation
+ */
+function activate() {
+	$result = activate_plugin( PLUGIN_FILE );
+
+	// Activate_plugin() returns null on success.
+	return is_null( $result );
+}
+
+/**
+ * Notify the user that the installation of Jetpack Boost failed.
+ */
+function error_notice() {
+	if ( empty( $_GET['jetpack-boost-install-error'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
+		return;
+	}
+
+	?>
+	<div class="notice notice-error is-dismissible">
+		<p><?php esc_html_e( 'There was an error installing Jetpack Boost. Please try again.', 'jetpack' ); ?></p>
+	</div>
+	<?php
+}

projects/plugins/jetpack/changelog/add-jitm-sideload-boost-plugin

@@ -0,0 +1,4 @@
+Significance: minor
+Type: other
+
+JITM: Added ability to sideload Jetpack Boost plugin.