?<h3>D¨ızenle: speculative-loading.php</h3>
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/**
 * Speculative loading functions.
 *
 * @package WordPress
 * @subpackage Speculative Loading
 * @since 6.8.0
 */

/**
 * Returns the speculation rules configuration.
 *
 * @since 6.8.0
 *
 * @return array&lt;string, string&gt;|null Associative array with &#039;mode&#039; and &#039;eagerness&#039; keys, or null if speculative
 *                                    loading is disabled.
 */
function wp_get_speculation_rules_configuration(): ?array {
	// By default, speculative loading is only enabled for sites with pretty permalinks when no user is logged in.
	if ( ! is_user_logged_in() &amp;&amp; get_option( &#039;permalink_structure&#039; ) ) {
		$config = array(
			&#039;mode&#039;      =&gt; &#039;auto&#039;,
			&#039;eagerness&#039; =&gt; &#039;auto&#039;,
		);
	} else {
		$config = null;
	}

	/**
	 * Filters the way that speculation rules are configured.
	 *
	 * The Speculation Rules API is a web API that allows to automatically prefetch or prerender certain URLs on the
	 * page, which can lead to near-instant page load times. This is also referred to as speculative loading.
	 *
	 * There are two aspects to the configuration:
	 * * The &quot;mode&quot; (whether to &quot;prefetch&quot; or &quot;prerender&quot; URLs).
	 * * The &quot;eagerness&quot; (whether to speculatively load URLs in an &quot;eager&quot;, &quot;moderate&quot;, or &quot;conservative&quot; way).
	 *
	 * By default, the speculation rules configuration is decided by WordPress Core (&quot;auto&quot;). This filter can be used
	 * to force a certain configuration, which could for instance load URLs more or less eagerly.
	 *
	 * For logged-in users or for sites that are not configured to use pretty permalinks, the default value is `null`,
	 * indicating that speculative loading is entirely disabled.
	 *
	 * @since 6.8.0
	 * @see https://developer.chrome.com/docs/web-platform/prerender-pages
	 *
	 * @param array&lt;string, string&gt;|null $config Associative array with &#039;mode&#039; and &#039;eagerness&#039; keys, or `null`. The
	 *                                           default value for both of the keys is &#039;auto&#039;. Other possible values
	 *                                           for &#039;mode&#039; are &#039;prefetch&#039; and &#039;prerender&#039;. Other possible values for
	 *                                           &#039;eagerness&#039; are &#039;eager&#039;, &#039;moderate&#039;, and &#039;conservative&#039;. The value
	 *                                           `null` is used to disable speculative loading entirely.
	 */
	$config = apply_filters( &#039;wp_speculation_rules_configuration&#039;, $config );

	// Allow the value `null` to indicate that speculative loading is disabled.
	if ( null === $config ) {
		return null;
	}

	// Sanitize the configuration and replace &#039;auto&#039; with current defaults.
	$default_mode      = &#039;prefetch&#039;;
	$default_eagerness = &#039;conservative&#039;;
	if ( ! is_array( $config ) ) {
		return array(
			&#039;mode&#039;      =&gt; $default_mode,
			&#039;eagerness&#039; =&gt; $default_eagerness,
		);
	}
	if (
		! isset( $config[&#039;mode&#039;] ) ||
		&#039;auto&#039; === $config[&#039;mode&#039;] ||
		! WP_Speculation_Rules::is_valid_mode( $config[&#039;mode&#039;] )
	) {
		$config[&#039;mode&#039;] = $default_mode;
	}
	if (
		! isset( $config[&#039;eagerness&#039;] ) ||
		&#039;auto&#039; === $config[&#039;eagerness&#039;] ||
		! WP_Speculation_Rules::is_valid_eagerness( $config[&#039;eagerness&#039;] ) ||
		// &#039;immediate&#039; is a valid eagerness, but for safety WordPress does not allow it for document-level rules.
		&#039;immediate&#039; === $config[&#039;eagerness&#039;]
	) {
		$config[&#039;eagerness&#039;] = $default_eagerness;
	}

	return array(
		&#039;mode&#039;      =&gt; $config[&#039;mode&#039;],
		&#039;eagerness&#039; =&gt; $config[&#039;eagerness&#039;],
	);
}

/**
 * Returns the full speculation rules data based on the configuration.
 *
 * Plugins with features that rely on frontend URLs to exclude from prefetching or prerendering should use the
 * {@see &#039;wp_speculation_rules_href_exclude_paths&#039;} filter to ensure those URL patterns are excluded.
 *
 * Additional speculation rules other than the default rule from WordPress Core can be provided by using the
 * {@see &#039;wp_load_speculation_rules&#039;} action and amending the passed WP_Speculation_Rules object.
 *
 * @since 6.8.0
 * @access private
 *
 * @return WP_Speculation_Rules|null Object representing the speculation rules to use, or null if speculative loading
 *                                   is disabled in the current context.
 */
function wp_get_speculation_rules(): ?WP_Speculation_Rules {
	$configuration = wp_get_speculation_rules_configuration();
	if ( null === $configuration ) {
		return null;
	}

	$mode      = $configuration[&#039;mode&#039;];
	$eagerness = $configuration[&#039;eagerness&#039;];

	$prefixer = new WP_URL_Pattern_Prefixer();

	$base_href_exclude_paths = array(
		$prefixer-&gt;prefix_path_pattern( &#039;/wp-*.php&#039;, &#039;site&#039; ),
		$prefixer-&gt;prefix_path_pattern( &#039;/wp-admin/*&#039;, &#039;site&#039; ),
		$prefixer-&gt;prefix_path_pattern( &#039;/*&#039;, &#039;uploads&#039; ),
		$prefixer-&gt;prefix_path_pattern( &#039;/*&#039;, &#039;content&#039; ),
		$prefixer-&gt;prefix_path_pattern( &#039;/*&#039;, &#039;plugins&#039; ),
		$prefixer-&gt;prefix_path_pattern( &#039;/*&#039;, &#039;template&#039; ),
		$prefixer-&gt;prefix_path_pattern( &#039;/*&#039;, &#039;stylesheet&#039; ),
	);

	/*
	 * If pretty permalinks are enabled, exclude any URLs with query parameters.
	 * Otherwise, exclude specifically the URLs with a `_wpnonce` query parameter or any other query parameter
	 * containing the word `nonce`.
	 */
	if ( get_option( &#039;permalink_structure&#039; ) ) {
		$base_href_exclude_paths[] = $prefixer-&gt;prefix_path_pattern( &#039;/*\\?(.+)&#039;, &#039;home&#039; );
	} else {
		$base_href_exclude_paths[] = $prefixer-&gt;prefix_path_pattern( &#039;/*\\?*(^|&amp;)*nonce*=*&#039;, &#039;home&#039; );
	}

	/**
	 * Filters the paths for which speculative loading should be disabled.
	 *
	 * All paths should start in a forward slash, relative to the root document. The `*` can be used as a wildcard.
	 * If the WordPress site is in a subdirectory, the exclude paths will automatically be prefixed as necessary.
	 *
	 * Note that WordPress always excludes certain path patterns such as `/wp-login.php` and `/wp-admin/*`, and those
	 * cannot be modified using the filter.
	 *
	 * @since 6.8.0
	 *
	 * @param string[] $href_exclude_paths Additional path patterns to disable speculative loading for.
	 * @param string   $mode               Mode used to apply speculative loading. Either &#039;prefetch&#039; or &#039;prerender&#039;.
	 */
	$href_exclude_paths = (array) apply_filters( &#039;wp_speculation_rules_href_exclude_paths&#039;, array(), $mode );

	// Ensure that:
	// 1. There are no duplicates.
	// 2. The base paths cannot be removed.
	// 3. The array has sequential keys (i.e. array_is_list()).
	$href_exclude_paths = array_values(
		array_unique(
			array_merge(
				$base_href_exclude_paths,
				array_map(
					static function ( string $href_exclude_path ) use ( $prefixer ): string {
						return $prefixer-&gt;prefix_path_pattern( $href_exclude_path );
					},
					$href_exclude_paths
				)
			)
		)
	);

	$speculation_rules = new WP_Speculation_Rules();

	$main_rule_conditions = array(
		// Include any URLs within the same site.
		array(
			&#039;href_matches&#039; =&gt; $prefixer-&gt;prefix_path_pattern( &#039;/*&#039; ),
		),
		// Except for excluded paths.
		array(
			&#039;not&#039; =&gt; array(
				&#039;href_matches&#039; =&gt; $href_exclude_paths,
			),
		),
		// Also exclude rel=nofollow links, as certain plugins use that on their links that perform an action.
		array(
			&#039;not&#039; =&gt; array(
				&#039;selector_matches&#039; =&gt; &#039;a[rel~=&quot;nofollow&quot;]&#039;,
			),
		),
		// Also exclude links that are explicitly marked to opt out, either directly or via a parent element.
		array(
			&#039;not&#039; =&gt; array(
				&#039;selector_matches&#039; =&gt; &quot;.no-{$mode}, .no-{$mode} a&quot;,
			),
		),
	);

	// If using &#039;prerender&#039;, also exclude links that opt out of &#039;prefetch&#039; because it&#039;s part of &#039;prerender&#039;.
	if ( &#039;prerender&#039; === $mode ) {
		$main_rule_conditions[] = array(
			&#039;not&#039; =&gt; array(
				&#039;selector_matches&#039; =&gt; &#039;.no-prefetch, .no-prefetch a&#039;,
			),
		);
	}

	$speculation_rules-&gt;add_rule(
		$mode,
		&#039;main&#039;,
		array(
			&#039;source&#039;    =&gt; &#039;document&#039;,
			&#039;where&#039;     =&gt; array(
				&#039;and&#039; =&gt; $main_rule_conditions,
			),
			&#039;eagerness&#039; =&gt; $eagerness,
		)
	);

	/**
	 * Fires when speculation rules data is loaded, allowing to amend the rules.
	 *
	 * @since 6.8.0
	 *
	 * @param WP_Speculation_Rules $speculation_rules Object representing the speculation rules to use.
	 */
	do_action( &#039;wp_load_speculation_rules&#039;, $speculation_rules );

	return $speculation_rules;
}

/**
 * Prints the speculation rules.
 *
 * For browsers that do not support speculation rules yet, the `script[type=&quot;speculationrules&quot;]` tag will be ignored.
 *
 * @since 6.8.0
 * @access private
 */
function wp_print_speculation_rules(): void {
	$speculation_rules = wp_get_speculation_rules();
	if ( null === $speculation_rules ) {
		return;
	}

	wp_print_inline_script_tag(
		(string) wp_json_encode(
			$speculation_rules
		),
		array( &#039;type&#039; =&gt; &#039;speculationrules&#039; )
	);
}
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