<?php
/**
 * Banner mode: "Always show" (default) or "US opt-out" (no banner for US visitors).
 *
 * US opt-out is only allowed while the last scan found no advertising tags and no
 * session recording. If a later scan finds one, the banner comes back on its own and
 * the compliance report flags it (emailed when alerts are on).
 *
 * @package GoConsent
 */

namespace GoConsent\Frontend;

use GoConsent\Scanner\Scanner;
use GoConsent\Settings;

defined( 'ABSPATH' ) || exit;

/**
 * Banner mode rules.
 */
class BannerMode {

	/**
	 * Autoloaded flag: 1 when the last scan allows US opt-out mode (read on every page).
	 */
	const FLAG = 'goconsent_optout_ok';

	/**
	 * Session-recording services (signature ids).
	 */
	const RECORDERS = array( 'clarity', 'hotjar', 'fullstory', 'mouseflow', 'luckyorange', 'smartlook', 'logrocket' );

	/**
	 * What stops US opt-out mode on this site: labels of ad tags and session recorders
	 * from the last scan, or a note that no scan has run yet.
	 *
	 * @param Settings $settings Settings.
	 * @return string[]
	 */
	public static function blockers( Settings $settings ) {
		$scan = get_option( Scanner::OPTION, array() );
		if ( ! is_array( $scan ) || empty( $scan['time'] ) ) {
			return array( __( 'No scan yet', 'goconsent' ) );
		}
		$over = (array) $settings->get( 'overrides' );
		$out  = array();
		foreach ( isset( $scan['items'] ) ? (array) $scan['items'] : array() as $id => $it ) {
			$cat = isset( $over[ $id ] ) ? $over[ $id ] : ( isset( $it['default'] ) ? $it['default'] : '' );
			if ( 'marketing' === $cat || in_array( (string) $id, self::RECORDERS, true ) ) {
				$out[] = isset( $it['label'] ) ? (string) $it['label'] : (string) $id;
			}
		}
		return array_values( array_unique( $out ) );
	}

	/**
	 * Store whether the site qualifies (after each scan or setting change).
	 *
	 * @param Settings $settings Settings.
	 */
	public static function refresh( Settings $settings ) {
		$ok = self::blockers( $settings ) ? 0 : 1;
		if ( (int) get_option( self::FLAG, 0 ) !== $ok ) {
			update_option( self::FLAG, $ok, true );
		}
	}

	/**
	 * Whether US visitors skip the banner on this request.
	 *
	 * @param Settings $settings Settings.
	 * @return bool
	 */
	public static function active( Settings $settings ) {
		return 'us_optout' === $settings->get( 'banner_mode' ) && 1 === (int) get_option( self::FLAG, 0 );
	}
}