<?php
namespace Footloom;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

// Adds the tracking script to front-end pages.
class Tracker {

	public static function register() {
		add_action( 'wp_enqueue_scripts', array( self::class, 'enqueue' ) );
	}

	// Print the tracker with page context and custom event rules. Logged-in users are tracked too,
	// except administrators while "Don't track administrators" is on.
	public static function enqueue() {
		if ( Collector::is_excluded_user() ) {
			return;
		}

		global $wp_query;

		$page = array(
			'post_id' => is_singular() ? get_queried_object_id() : null,
			'is_404'  => is_404(),
		);
		if ( is_search() ) {
			$page['search_term']    = get_search_query( false );
			$page['search_results'] = (int) $wp_query->found_posts;
		}

		$rules = array_values( array_filter( (array) get_option( 'footloom_event_rules', array() ), function ( $rule ) {
			return ! empty( $rule['enabled'] );
		} ) );

		wp_enqueue_script( 'footloom-tracker', Plugin::url( 'public/tracker.js' ), array(), Plugin::VERSION, array(
			'in_footer' => true,
			'strategy'  => 'defer',
		) );
		wp_add_inline_script(
			'footloom-tracker',
			'window.footloomConfig = ' . wp_json_encode( array(
				// Relative URL so it always matches the page's own origin.
				'collect' => wp_parse_url( home_url( '/' ), PHP_URL_PATH ) . '?footloom_collect=',
				'page'     => $page,
				'rules'    => $rules,
			), JSON_HEX_TAG ) . ';',
			'before'
		);
	}
}