<?php
/**
 * Support for WordPress Core API for Speculative Loading.
 *
 * @package speculation-rules
 * @since 1.5.0
 */

// @codeCoverageIgnoreStart
if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}
// @codeCoverageIgnoreEnd

/**
 * Filters the WordPress Core speculation rules configuration to use the settings configured in the plugin.
 *
 * By default, this will override the Core implementation to use moderate prerender instead of conservative prefetch.
 *
 * @since 1.5.0
 *
 * @param array<string, string>|null|mixed $config Associative array with 'mode' and 'eagerness' keys, or `null`.
 * @return array<string, string>|null Filtered $config.
 */
function plsr_filter_speculation_rules_configuration( $config ): ?array {
	if ( ! is_array( $config ) ) {
		// Because plugins do bad things.
		$config = null;
	}

	if ( plsr_is_speculative_loading_enabled() ) {
		$option = plsr_get_stored_setting_value();
		$config = array(
			'mode'      => $option['mode'],
			'eagerness' => $option['eagerness'],
		);
	}

	return $config;
}

/**
 * Filters the WordPress Core speculation rules paths for which speculative loading should be disabled.
 *
 * This is present for backward compatibility so that usage of the plugin-specific filter does not break.
 *
 * @since 1.5.0
 *
 * @param string[]|mixed $href_exclude_paths Additional path patterns to disable speculative loading for.
 * @param string         $mode               Mode used to apply speculative loading. Either 'prefetch' or 'prerender'.
 * @return string[] Filtered $href_exclude_paths.
 */
function plsr_filter_speculation_rules_exclude_paths( $href_exclude_paths, string $mode ): array {
	if ( ! is_array( $href_exclude_paths ) ) {
		$href_exclude_paths = (bool) $href_exclude_paths ? (array) $href_exclude_paths : array();
	}

	/** This filter is documented in plugin-api.php */
	return (array) apply_filters( 'plsr_speculation_rules_href_exclude_paths', $href_exclude_paths, $mode );
}