SPATH . '/wp-admin/includes/plugin.php';
		return 0 === validate_plugin( self::PLUGIN_FILE );
	}

	/**
	 * Install and activate WooCommerce Payments.
	 *
	 * @return boolean Whether the plugin was successfully activated.
	 */
	private function install_and_activate_wcpay() {
		$install_request = array( 'plugins' => self::PLUGIN_SLUG );
		$installer       = new \Automattic\WooCommerce\Admin\API\Plugins();
		$result          = $installer->install_plugins( $install_request );
		if ( is_wp_error( $result ) ) {
			return false;
		}

		wc_admin_record_tracks_event( 'woocommerce_payments_install', array( 'context' => 'inbox' ) );

		$activate_request = array( 'plugins' => self::PLUGIN_SLUG );
		$result           = $installer->activate_plugins( $activate_request );
		if ( is_wp_error( $result ) ) {
			return false;
		}

		return true;
	}

	/**
	 * Install & activate WooCommerce Payments plugin, and redirect to setup.
	 */
	public function install_on_action() {
		// TODO: Need to validate this request more strictly since we're taking install actions directly?
		if (
			! isset( $_GET['page'] ) ||
			'wc-admin' !== $_GET['page'] ||
			! isset( $_GET['action'] ) ||
			'setup-woocommerce-payments' !== $_GET['action']
		) {
			return;
		}

		$data_store = Notes::load_data_store();

		// We already have this note? Then mark the note as actioned.
		$note_ids = $data_store->get_notes_with_name( self::NOTE_NAME );
		if ( empty( $note_ids ) ) {
			return;
		}

		$note_id = array_pop( $note_ids );
		$note    = Notes::get_note( $note_id );
		if ( false === $note ) {
			return;
		}
		$action = $note->get_action( 'get-started' );
		if ( ! $action ||
			( isset( $action->nonce_action ) &&
				(
					empty( $_GET['_wpnonce'] ) ||
					! wp_verify_nonce( wp_unslash( $_GET['_wpnonce'] ), $action->nonce_action ) // phpcs:ignore WordPress.Security.ValidatedSanitizedInput
				)
			)
		) {
			return;
		}

		if ( ! current_user_can( 'install_plugins' ) ) {
			return;
		}

		$this->install_and_activate_wcpay();

		// WooCommerce Payments is installed at this point, so link straight into the onboarding flow.
		$connect_url = add_query_arg(
			array(
				'wcpay-connect' => '1',
				'_wpnonce'      => wp_create_nonce( 'wcpay-connect' ),
			),
			admin_url()
		);
		wp_safe_redirect( $connect_url );
		exit;
	}
}