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<?php // phpcs:ignore WordPress.Files.FileName.NotHyphenatedLowercase
/**
 * This file is meant to be the home for any generic & reusable functions
 * that can be accessed anywhere within Jetpack.
 *
 * This file is loaded whether Jetpack is active.
 *
 * Please namespace with jetpack_
 *
 * @package automattic/jetpack
 */

use Automattic\Jetpack\Connection\Client;
use Automattic\Jetpack\Redirect;
use Automattic\Jetpack\Status\Host;
use Automattic\Jetpack\Status\Request;
use Automattic\Jetpack\Sync\Functions;

// Disable direct access.
if ( ! defined( 'ABSPATH' ) ) {
	exit( 0 );
}

require_once __DIR__ . '/functions.is-mobile.php';

/**
 * Hook into Core's _deprecated_function
 * Add more details about when a deprecated function will be removed.
 *
 * @since 8.8.0
 *
 * @param string $function    The function that was called.
 * @param string $replacement Optional. The function that should have been called. Default null.
 * @param string $version     The version of Jetpack that deprecated the function.
 */
function jetpack_deprecated_function( $function, $replacement, $version ) {
	// Bail early for non-Jetpack deprecations.
	if ( ! str_starts_with( $version, 'jetpack-' ) ) {
		return;
	}

// Look for when a function will be removed based on when it was deprecated.
	$removed_version = jetpack_get_future_removed_version( $version );

// If we could find a version, let's log a message about when removal will happen.
	if (
		! empty( $removed_version )
		&& ( defined( 'WP_DEBUG' ) && WP_DEBUG )
		/** This filter is documented in core/src/wp-includes/functions.php */
		&& apply_filters( 'deprecated_function_trigger_error', true )
	) {
		error_log( // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
			sprintf(
				doing_action( 'after_setup_theme' ) || did_action( 'after_setup_theme' ) ?
					/* Translators: 1. Function name. 2. Jetpack version number. */
					__( 'The %1$s function will be removed from the Jetpack plugin in version %2$s.', 'jetpack' )
					: 'The %1$s function will be removed from the Jetpack plugin in version %2$s.',
				$function,
				$removed_version
			)
		);

}
}
add_action( 'deprecated_function_run', 'jetpack_deprecated_function', 10, 3 );

/**
 * Hook into Core's _deprecated_file
 * Add more details about when a deprecated file will be removed.
 *
 * @since 8.8.0
 *
 * @param string $file        The file that was called.
 * @param string $replacement The file that should have been included based on ABSPATH.
 * @param string $version     The version of WordPress that deprecated the file.
 * @param string $message     A message regarding the change.
 */
function jetpack_deprecated_file( $file, $replacement, $version, $message ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
	// Bail early for non-Jetpack deprecations.
	if ( ! str_starts_with( $version, 'jetpack-' ) ) {
		return;
	}

// Look for when a file will be removed based on when it was deprecated.
	$removed_version = jetpack_get_future_removed_version( $version );

// If we could find a version, let's log a message about when removal will happen.
	if (
		! empty( $removed_version )
		&& ( defined( 'WP_DEBUG' ) && WP_DEBUG )
		/** This filter is documented in core/src/wp-includes/functions.php */
		&& apply_filters( 'deprecated_file_trigger_error', true )
	) {
		error_log( // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_error_log
			sprintf(
				/* Translators: 1. File name. 2. Jetpack version number. */
				__( 'The %1$s file will be removed from the Jetpack plugin in version %2$s.', 'jetpack' ),
				$file,
				$removed_version
			)
		);

}
}
add_action( 'deprecated_file_included', 'jetpack_deprecated_file', 10, 4 );

/**
 * Get the major version number of Jetpack 6 months after provided version.
 * Useful to indicate when a deprecated function will be removed from Jetpack.
 *
 * @since 8.8.0
 *
 * @param string $version The version of WordPress that deprecated the function.
 *
 * @return bool|float Return a Jetpack Major version number, or false.
 */
function jetpack_get_future_removed_version( $version ) {
	/*
	 * Extract the version number from a deprecation notice.
	 * (let's only keep the first decimal, e.g. 8.8 and not 8.8.0)
	 */
	preg_match( '#(([0-9]+\.([0-9]+))(?:\.[0-9]+)*)#', $version, $matches );

if ( isset( $matches[2] ) && isset( $matches[3] ) ) {
		$deprecated_version = (float) $matches[2];
		$deprecated_minor   = (float) $matches[3];

/*
		 * If the detected minor version number
		 * (e.g. "7" in "8.7")
		 * is higher than 9, we know the version number is malformed.
		 * Jetpack does not use semver yet.
		 * Bail.
		 */
		if ( 10 <= $deprecated_minor ) {
			return false;
		}

// We'll remove the function from the code 6 months later, thus 6 major versions later.
		$removed_version = $deprecated_version + 0.6;

return $removed_version;
	}

return false;
}

/**
 * Determine if this site is an WoA site or not by looking for presence of the wpcomsh plugin.
 *
 * @since 4.8.1
 * @deprecated 10.3.0
 *
 * @return bool
 */
function jetpack_is_atomic_site() {
	jetpack_deprecated_function( __FUNCTION__, 'Automattic/Jetpack/Status/Host::is_woa_site', 'jetpack-10.3.0' );
	return ( new Host() )->is_woa_site();
}

/**
 * Register post type for migration.
 *
 * @since 5.2
 */
function jetpack_register_migration_post_type() {
	register_post_type(
		'jetpack_migration',
		array(
			'supports'     => array(),
			'taxonomies'   => array(),
			'hierarchical' => false,
			'public'       => false,
			'has_archive'  => false,
			'can_export'   => true,
		)
	);
}

/**
 * Checks whether the Post DB threat currently exists on the site.
 *
 * @since 12.0
 *
 * @param string $option_name  Option name.
 *
 * @return WP_Post|bool
 */
function jetpack_migration_post_exists( $option_name ) {
	$query = new WP_Query(
		array(
			'post_type'              => 'jetpack_migration',
			'title'                  => $option_name,
			'post_status'            => 'all',
			'posts_per_page'         => 1,
			'no_found_rows'          => true,
			'ignore_sticky_posts'    => true,
			'update_post_term_cache' => false,
			'update_post_meta_cache' => false,
			'orderby'                => 'post_date ID',
			'order'                  => 'ASC',
		)
	);
	if ( ! empty( $query->post ) ) {
		return $query->post;
	}

return false;
}

/**
 * Stores migration data in the database.
 *
 * @since 5.2
 *
 * @param string $option_name  Option name.
 * @param bool   $option_value Option value.
 *
 * @return int|WP_Error
 */
function jetpack_store_migration_data( $option_name, $option_value ) {
	jetpack_register_migration_post_type();

$insert = array(
		'post_title'            => $option_name,
		'post_content_filtered' => $option_value,
		'post_type'             => 'jetpack_migration',
		'post_date'             => gmdate( 'Y-m-d H:i:s', time() ),
	);

$migration_post = jetpack_migration_post_exists( $option_name );
	if ( $migration_post ) {
		$insert['ID'] = $migration_post->ID;
	}

return wp_insert_post( $insert, true );
}

/**
 * Retrieves legacy image widget data.
 *
 * @since 5.2
 *
 * @param string $option_name Option name.
 *
 * @return mixed|null
 */
function jetpack_get_migration_data( $option_name ) {
	$post = jetpack_migration_post_exists( $option_name );

return null !== $post ? maybe_unserialize( $post->post_content_filtered ) : null;
}

/**
 * Prints a TOS blurb used throughout the connection prompts.
 *
 * @since 5.3
 *
 * @echo string
 */
function jetpack_render_tos_blurb() {
	printf(
		wp_kses(
			/* Translators: placeholders are links. */
			__( 'By clicking <strong>Set up Jetpack</strong>, you agree to our <a href="%1$s" target="_blank" rel="noopener noreferrer">Terms of Service</a> and to <a href="%2$s" target="_blank" rel="noopener noreferrer">sync your site‘s data</a> with us.', 'jetpack' ),
			array(
				'a'      => array(
					'href'   => array(),
					'target' => array(),
					'rel'    => array(),
				),
				'strong' => true,
			)
		),
		esc_url( Redirect::get_url( 'wpcom-tos' ) ),
		esc_url( Redirect::get_url( 'jetpack-support-what-data-does-jetpack-sync' ) )
	);
}

/**
 * Intervene upgrade process so Jetpack themes are downloaded with credentials.
 *
 * @since 5.3
 *
 * @param bool   $preempt Whether to preempt an HTTP request's return value. Default false.
 * @param array  $r       HTTP request arguments.
 * @param string $url     The request URL.
 *
 * @return array|bool|WP_Error
 */
function jetpack_theme_update( $preempt, $r, $url ) {
	if ( 0 === stripos( $url, JETPACK__WPCOM_JSON_API_BASE . '/rest/v1/themes/download' ) ) {
		$file = $r['filename'];
		if ( ! $file ) {
			return new WP_Error( 'problem_creating_theme_file', esc_html__( 'Problem creating file for theme download', 'jetpack' ) );
		}
		$theme = pathinfo( wp_parse_url( $url, PHP_URL_PATH ), PATHINFO_FILENAME );

// Remove filter to avoid endless loop since wpcom_json_api_request_as_blog uses this too.
		remove_filter( 'pre_http_request', 'jetpack_theme_update' );
		$result = Client::wpcom_json_api_request_as_blog(
			"themes/download/$theme.zip",
			'1.1',
			array(
				'stream'   => true,
				'filename' => $file,
			)
		);

if ( 200 !== wp_remote_retrieve_response_code( $result ) ) {
			return new WP_Error( 'problem_fetching_theme', esc_html__( 'Problem downloading theme', 'jetpack' ) );
		}
		return $result;
	}
	return $preempt;
}

/**
 * Add the filter when a upgrade is going to be downloaded.
 *
 * @since 5.3
 *
 * @param bool $reply Whether to bail without returning the package. Default false.
 *
 * @return bool
 */
function jetpack_upgrader_pre_download( $reply ) {
	add_filter( 'pre_http_request', 'jetpack_theme_update', 10, 3 );
	return $reply;
}

add_filter( 'upgrader_pre_download', 'jetpack_upgrader_pre_download' );

/**
 * Wraps data in a way so that we can distinguish between objects and array and also prevent object recursion.
 *
 * @since 6.1.0

* @deprecated Automattic\Jetpack\Sync\Functions::json_wrap
 *
 * @param mixed $any        Source data to be cleaned up.
 * @param array $seen_nodes Built array of nodes.
 *
 * @return array
 */
function jetpack_json_wrap( &$any, $seen_nodes = array() ) {
	_deprecated_function( __METHOD__, 'jetpack-9.5', 'Automattic\Jetpack\Sync\Functions' );

return Functions::json_wrap( $any, $seen_nodes );
}

/**
 * Checks if the mime_content_type function is available and return it if so.
 *
 * The function mime_content_type is enabled by default in PHP, but can be disabled. We attempt to
 * enforce this via composer.json, but that won't be checked in majority of cases where
 * this would be happening.
 *
 * @since 7.8.0
 *
 * @param string $file File location.
 *
 * @return string|false MIME type or false if functionality is not available.
 */
function jetpack_mime_content_type( $file ) {
	if ( function_exists( 'mime_content_type' ) ) {
		return mime_content_type( $file );
	}

return false;
}

/**
 * Checks that the mime type of the specified file is among those in a filterable list of mime types.
 *
 * @since 7.8.0
 *
 * @param string $file Path to file to get its mime type.
 *
 * @return bool
 */
function jetpack_is_file_supported_for_sideloading( $file ) {
	$type = jetpack_mime_content_type( $file );

if ( ! $type ) {
		return false;
	}

/**
	 * Filter the list of supported mime types for media sideloading.
	 *
	 * @since 4.0.0
	 *
	 * @module json-api
	 *
	 * @param array $supported_mime_types Array of the supported mime types for media sideloading.
	 */
	$supported_mime_types = apply_filters(
		'jetpack_supported_media_sideload_types',
		array(
			'image/png',
			'image/jpeg',
			'image/gif',
			'image/bmp',
			'image/webp',
			'video/quicktime',
			'video/mp4',
			'video/mpeg',
			'video/ogg',
			'video/3gpp',
			'video/3gpp2',
			'video/h261',
			'video/h262',
			'video/h264',
			'video/x-msvideo',
			'video/x-ms-wmv',
			'video/x-ms-asf',
		)
	);

// If the type returned was not an array as expected, then we know we don't have a match.
	if ( ! is_array( $supported_mime_types ) ) {
		return false;
	}

return in_array( $type, $supported_mime_types, true );
}

/**
 * Go through headers and get a list of Vary headers to add,
 * including a Vary Accept header if necessary.
 *
 * @since 12.2
 * @deprecated 14.8
 *
 * @param array $headers The headers to be sent.
 *
 * @return array $vary_header_parts Vary Headers to be sent.
 */
function jetpack_get_vary_headers( $headers = array() ) {
	_deprecated_function( __FUNCTION__, '14.8', 'Automattic\Jetpack\Status\Request::get_vary_headers' );

return ( new Request() )->get_vary_headers( $headers );
}

/**
 * Determine whether the current request is for accessing the frontend.
 * Also update Vary headers to indicate that the response may vary by Accept header.
 *
 * @deprecated 14.8
 *
 * @return bool True if it's a frontend request, false otherwise.
 */
function jetpack_is_frontend() {
	_deprecated_function( __FUNCTION__, '14.8', 'Automattic\Jetpack\Status\Request::is_frontend' );

return Request::is_frontend();
}

if ( ! function_exists( 'jetpack_mastodon_get_instance_list' ) ) {
	/**
	 * Build a list of Mastodon instance hosts.
	 * That list can be extended via a filter.
	 *
	 * @todo This function is now replicated in the Classic Theme Helper package and can be
	 * removed here once Social Links are moved out of Jetpack.
	 *
	 * @since 11.8
	 *
	 * @return array
	 */
	function jetpack_mastodon_get_instance_list() {
		$mastodon_instance_list = array(
			// Regex pattern to match any .tld for the mastodon host name.
			'#https?:\/\/(www\.)?mastodon\.(\w+)(\.\w+)?#',
			// Regex pattern to match any .tld for the mstdn host name.
			'#https?:\/\/(www\.)?mstdn\.(\w+)(\.\w+)?#',
			'counter.social',
			'fosstodon.org',
			'gc2.jp',
			'hachyderm.io',
			'infosec.exchange',
			'mas.to',
			'pawoo.net',
		);

/**
		 * Filter the list of Mastodon instances.
		 *
		 * @since 11.8
		 *
		 * @module widgets, theme-tools
		 *
		 * @param array $mastodon_instance_list Array of Mastodon instances.
		 */
		return (array) apply_filters( 'jetpack_mastodon_instance_list', $mastodon_instance_list );
	}
}

if ( ! function_exists( 'jetpack_is_internal_testing_environment' ) ) {
	/**
	 * Check if the site is an A8C-internal testing environment.
	 *
	 * Returns true for localhost, Jurassic Ninja/Tube sandboxes, A8C proxied
	 * requests, and known Atomic client IDs used for internal testing. Useful
	 * for tagging analytics events as test traffic so they can be filtered out
	 * of production reporting.
	 *
	 * Not to be confused with Jetpack's legacy "Development Mode", which is now
	 * Status::is_offline_mode() and controls whether Jetpack connects to
	 * WordPress.com.
	 *
	 * Note: This intentionally duplicates the logic from
	 * Agents_Manager::is_dev_mode() in jetpack-agents-manager rather than calling
	 * it directly, because that package is only available on WordPress.com
	 * hosted sites, while Jetpack also runs on self-hosted sites.
	 *
	 * @since 15.8
	 *
	 * @return bool
	 */
	function jetpack_is_internal_testing_environment() {
		// Known local environments.
		$domain = (string) wp_parse_url( get_site_url(), PHP_URL_HOST );
		if (
			$domain === 'localhost' ||
			'.jurassic.tube' === stristr( $domain, '.jurassic.tube' ) ||
			'.jurassic.ninja' === stristr( $domain, '.jurassic.ninja' )
		) {
			return true;
		}

// Proxied A8C request via function.
		if ( function_exists( 'wpcom_is_proxied_request' ) && wpcom_is_proxied_request() ) {
			return true;
		}

// Proxied A8C request via server variable or constant.
		if (
			( isset( $_SERVER['A8C_PROXIED_REQUEST'] ) && (bool) sanitize_text_field( wp_unslash( $_SERVER['A8C_PROXIED_REQUEST'] ) ) ) ||
			( defined( 'A8C_PROXIED_REQUEST' ) && A8C_PROXIED_REQUEST )
		) {
			return true;
		}

if ( defined( 'AT_PROXIED_REQUEST' ) && AT_PROXIED_REQUEST && defined( 'ATOMIC_CLIENT_ID' ) ) {
			switch ( ATOMIC_CLIENT_ID ) {
				case 1:
				case 2:
				case 3:
				case 32:
				case 118:
					return true;
			}
		}

return false;
	}
}

Editing: functions.global.php

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