<?php
/**
* A simple set of functions to check the WordPress.org Version Update service.
*
* @package WordPress
* @since 2.3.0
*/

/**
* Checks WordPress version against the newest version.
*
* The WordPress version, PHP version, and locale is sent.
*
* Checks against the WordPress server at api.wordpress.org. Will only check
* if WordPress isn't installing.
*
* @since 2.3.0
*
* @global string $wp_version Used to check against the newest WordPress version.
* @global wpdb $wpdb WordPress database abstraction object.
* @global string $wp_local_package Locale code of the package.
*
* @param array $extra_stats Extra statistics to report to the WordPress.org API.
* @param bool $force_check Whether to bypass the transient cache and force a fresh update check.
* Defaults to false, true if $extra_stats is set.
*/
function wp_version_check( $extra_stats = array(), $force_check = false ) {
global $wpdb, $wp_local_package;

if ( wp_installing() ) {
return;
}

$php_version = PHP_VERSION;

$current = get_site_transient( 'update_core' );
$translations = wp_get_installed_translations( 'core' );

// Invalidate the transient when $wp_version changes.
if ( is_object( $current ) && wp_get_wp_version() !== $current->version_checked ) {
$current = false;
}

if ( ! is_object( $current ) ) {
$current = new stdClass();
$current->updates = array();
$current->version_checked = wp_get_wp_version();
}

if ( ! empty( $extra_stats ) ) {
$force_check = true;
}

// Wait 1 minute between multiple version check requests.
$timeout = MINUTE_IN_SECONDS;
$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );

if ( ! $force_check && $time_not_changed ) {
return;
}

/**
* Filters the locale requested for WordPress core translations.
*
* @since 2.8.0
*
* @param string $locale Current locale.
*/
$locale = apply_filters( 'core_version_check_locale', get_locale() );

// Update last_checked for current to prevent multiple blocking requests if request hangs.
$current->last_checked = time();
set_site_transient( 'update_core', $current );

if ( method_exists( $wpdb, 'db_server_info' ) ) {
$mysql_version = $wpdb->db_server_info();
} elseif ( method_exists( $wpdb, 'db_version' ) ) {
$mysql_version = preg_replace( '/[^0-9.].*/', '', $wpdb->db_version() );
} else {
$mysql_version = 'N/A';
}

if ( is_multisite() ) {
$num_blogs = get_blog_count();
$wp_install = network_site_url();
$multisite_enabled = 1;
} else {
$multisite_enabled = 0;
$num_blogs = 1;
$wp_install = home_url( '/' );
}

$extensions = get_loaded_extensions();
sort( $extensions, SORT_STRING | SORT_FLAG_CASE );
$query = array(
'version' => wp_get_wp_version(),
'php' => $php_version,
'locale' => $locale,
'mysql' => $mysql_version,
'local_package' => isset( $wp_local_package ) ? $wp_local_package : '',
'blogs' => $num_blogs,
'users' => get_user_count(),
'multisite_enabled' => $multisite_enabled,
'initial_db_version' => get_site_option( 'initial_db_version' ),
'extensions' => array_combine( $extensions, array_map( 'phpversion', $extensions ) ),
'platform_flags' => array(
'os' => PHP_OS,
'bits' => PHP_INT_SIZE === 4 ? 32 : 64,
),
'image_support' => array(),
);

if ( function_exists( 'gd_info' ) ) {
$gd_info = gd_info();
// Filter to supported values.
$gd_info = array_filter( $gd_info );

// Add data for GD WebP, AVIF, HEIC and JPEG XL support.
$query['image_support']['gd'] = array_keys(
array_filter(
array(
'webp' => isset( $gd_info['WebP Support'] ),
'avif' => isset( $gd_info['AVIF Support'] ),
'heic' => isset( $gd_info['HEIC Support'] ),
'jxl' => isset( $gd_info['JXL Support'] ),
)
)
);
}

if ( class_exists( 'Imagick' ) ) {
// Add data for Imagick WebP, AVIF, HEIC and JPEG XL support.
$query['image_support']['imagick'] = array_keys(
array_filter(
array(
'webp' => ! empty( Imagick::queryFormats( 'WEBP' ) ),
'avif' => ! empty( Imagick::queryFormats( 'AVIF' ) ),
'heic' => ! empty( Imagick::queryFormats( 'HEIC' ) ),
'jxl' => ! empty( Imagick::queryFormats( 'JXL' ) ),
)
)
);
}

/**
* Filters the query arguments sent as part of the core version check.
*
* WARNING: Changing this data may result in your site not receiving security updates.
* Please exercise extreme caution.
*
* @since 4.9.0
*
* @param array $query {
* Version check query arguments.
*
* @type string $version WordPress version number.
* @type string $php PHP version number.
* @type string $locale The locale to retrieve updates for.
* @type string $mysql MySQL version number.
* @type string $local_package The value of the $wp_local_package global, when set.
* @type int $blogs Number of sites on this WordPress installation.
* @type int $users Number of users on this WordPress installation.
* @type int $multisite_enabled Whether this WordPress installation uses Multisite.
* @type int $initial_db_version Database version of WordPress at time of installation.
* }
*/
$query = apply_filters( 'core_version_check_query_args', $query );

$post_body = array(
'translations' => wp_json_encode( $translations ),
);

if ( is_array( $extra_stats ) ) {
$post_body = array_merge( $post_body, $extra_stats );
}

// Allow for WP_AUTO_UPDATE_CORE to specify beta/RC/development releases.
if ( defined( 'WP_AUTO_UPDATE_CORE' )
&& in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development', 'branch-development' ), true )
) {
$query['channel'] = WP_AUTO_UPDATE_CORE;
}

$url = 'http://api.wordpress.org/core/version-check/1.7/?' . http_build_query( $query, '', '&' );
$http_url = $url;
$ssl = wp_http_supports( array( 'ssl' ) );

if ( $ssl ) {
$url = set_url_scheme( $url, 'https' );
}

$doing_cron = wp_doing_cron();

$options = array(
'timeout' => $doing_cron ? 30 : 3,
'user-agent' => 'WordPress/' . wp_get_wp_version() . '; ' . home_url( '/' ),
'headers' => array(
'wp_install' => $wp_install,
'wp_blog' => home_url( '/' ),
),
'body' => $post_body,
);

$response = wp_remote_post( $url, $options );

if ( $ssl && is_wp_error( $response ) ) {
wp_trigger_error(
__FUNCTION__,
sprintf(
/* translators: %s: Support forums URL. */
__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
__( 'https://wordpress.org/support/forums/' )
) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
);
$response = wp_remote_post( $http_url, $options );
}

if ( is_wp_error( $response ) || 200 !== wp_remote_retrieve_response_code( $response ) ) {
return;
}

$body = trim( wp_remote_retrieve_body( $response ) );
$body = json_decode( $body, true );

if ( ! is_array( $body ) || ! isset( $body['offers'] ) ) {
return;
}

$offers = $body['offers'];

foreach ( $offers as &$offer ) {
foreach ( $offer as $offer_key => $value ) {
if ( 'packages' === $offer_key ) {
$offer['packages'] = (object) array_intersect_key(
array_map( 'esc_url', $offer['packages'] ),
array_fill_keys( array( 'full', 'no_content', 'new_bundled', 'partial', 'rollback' ), '' )
);
} elseif ( 'download' === $offer_key ) {
$offer['download'] = esc_url( $value );
} else {
$offer[ $offer_key ] = esc_html( $value );
}
}
$offer = (object) array_intersect_key(
$offer,
array_fill_keys(
array(
'response',
'download',
'locale',
'packages',
'current',
'version',
'php_version',
'mysql_version',
'new_bundled',
'partial_version',
'notify_email',
'support_email',
'new_files',
),
''
)
);
}

$updates = new stdClass();
$updates->updates = $offers;
$updates->last_checked = time();
$updates->version_checked = wp_get_wp_version();

if ( isset( $body['translations'] ) ) {
$updates->translations = $body['translations'];
}

set_site_transient( 'update_core', $updates );

if ( ! empty( $body['ttl'] ) ) {
$ttl = (int) $body['ttl'];

if ( $ttl && ( time() + $ttl < wp_next_scheduled( 'wp_version_check' ) ) ) {
// Queue an event to re-run the update check in $ttl seconds.
wp_schedule_single_event( time() + $ttl, 'wp_version_check' );
}
}

// Trigger background updates if running non-interactively, and we weren't called from the update handler.
if ( $doing_cron && ! doing_action( 'wp_maybe_auto_update' ) ) {
/**
* Fires during wp_cron, starting the auto-update process.
*
* @since 3.9.0
*/
do_action( 'wp_maybe_auto_update' );
}
}

/**
* Checks for available updates to plugins based on the latest versions hosted on WordPress.org.
*
* Despite its name this function does not actually perform any updates, it only checks for available updates.
*
* A list of all plugins installed is sent to WP, along with the site locale.
*
* Checks against the WordPress server at api.wordpress.org. Will only check
* if WordPress isn't installing.
*
* @since 2.3.0
*
* @global string $wp_version The WordPress version string.
*
* @param array $extra_stats Extra statistics to report to the WordPress.org API.
*/
function wp_update_plugins( $extra_stats = array() ) {
if ( wp_installing() ) {
return;
}

// If running blog-side, bail unless we've not checked in the last 12 hours.
if ( ! function_exists( 'get_plugins' ) ) {
require_once ABSPATH . 'wp-admin/includes/plugin.php';
}

$plugins = get_plugins();
$translations = wp_get_installed_translations( 'plugins' );

$active = get_option( 'active_plugins', array() );
$current = get_site_transient( 'update_plugins' );

if ( ! is_object( $current ) ) {
$current = new stdClass();
}

$updates = new stdClass();
$updates->last_checked = time();
$updates->response = array();
$updates->translations = array();
$updates->no_update = array();

$doing_cron = wp_doing_cron();

// Check for update on a different schedule, depending on the page.
switch ( current_filter() ) {
case 'upgrader_process_complete':
$timeout = 0;
break;
case 'load-update-core.php':
$timeout = MINUTE_IN_SECONDS;
break;
case 'load-plugins.php':
case 'load-update.php':
$timeout = HOUR_IN_SECONDS;
break;
default:
if ( $doing_cron ) {
$timeout = 2 * HOUR_IN_SECONDS;
} else {
$timeout = 12 * HOUR_IN_SECONDS;
}
}

$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );

if ( $time_not_changed && ! $extra_stats ) {
$plugin_changed = false;

foreach ( $plugins as $file => $p ) {
$updates->checked[ $file ] = $p['Version'];

if ( ! isset( $current->checked[ $file ] ) || (string) $current->checked[ $file ] !== (string) $p['Version'] ) {
$plugin_changed = true;
}
}

if ( isset( $current->response ) && is_array( $current->response ) ) {
foreach ( $current->response as $plugin_file => $update_details ) {
if ( ! isset( $plugins[ $plugin_file ] ) ) {
$plugin_changed = true;
break;
}
}
}

// Bail if we've checked recently and if nothing has changed.
if ( ! $plugin_changed ) {
return;
}
}

// Update last_checked for current to prevent multiple blocking requests if request hangs.
$current->last_checked = time();
set_site_transient( 'update_plugins', $current );

$to_send = compact( 'plugins', 'active' );

$locales = array_values( get_available_languages() );

/**
* Filters the locales requested for plugin translations.
*
* @since 3.7.0
* @since 4.5.0 The default value of the `$locales` parameter changed to include all locales.
*
* @param string[] $locales Plugin locales. Default is all available locales of the site.
*/
$locales = apply_filters( 'plugins_update_check_locales', $locales );
$locales = array_unique( $locales );

if ( $doing_cron ) {
$timeout = 30; // 30 seconds.
} else {
// Three seconds, plus one extra second for every 10 plugins.
$timeout = 3 + (int) ( count( $plugins ) / 10 );
}

$options = array(
'timeout' => $timeout,
'body' => array(
'plugins' => wp_json_encode( $to_send ),
'translations' => wp_json_encode( $translations ),
'locale' => wp_json_encode( $locales ),
'all' => wp_json_encode( true ),
),
'user-agent' => 'WordPress/' . wp_get_wp_version() . '; ' . home_url( '/' ),
);

if ( $extra_stats ) {
$options['body']['update_stats'] = wp_json_encode( $extra_stats );
}

$url = 'http://api.wordpress.org/plugins/update-check/1.1/';
$http_url = $url;
$ssl = wp_http_supports( array( 'ssl' ) );

if ( $ssl ) {
$url = set_url_scheme( $url, 'https' );
}

$raw_response = wp_remote_post( $url, $options );

if ( $ssl && is_wp_error( $raw_response ) ) {
wp_trigger_error(
__FUNCTION__,
sprintf(
/* translators: %s: Support forums URL. */
__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
__( 'https://wordpress.org/support/forums/' )
) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
);
$raw_response = wp_remote_post( $http_url, $options );
}

if ( is_wp_error( $raw_response ) || 200 !== wp_remote_retrieve_response_code( $raw_response ) ) {
return;
}

$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );

if ( $response && is_array( $response ) ) {
$updates->response = $response['plugins'];
$updates->translations = $response['translations'];
$updates->no_update = $response['no_update'];
}

// Support updates for any plugins using the `Update URI` header field.
foreach ( $plugins as $plugin_file => $plugin_data ) {
if ( ! $plugin_data['UpdateURI'] || isset( $updates->response[ $plugin_file ] ) ) {
continue;
}

$hostname = wp_parse_url( sanitize_url( $plugin_data['UpdateURI'] ), PHP_URL_HOST );

/**
* Filters the update response for a given plugin hostname.
*
* The dynamic portion of the hook name, `$hostname`, refers to the hostname
* of the URI specified in the `Update URI` header field.
*
* @since 5.8.0
*
* @param array|false $update {
* The plugin update data with the latest details. Default false.
*
* @type string $id Optional. ID of the plugin for update purposes, should be a URI
* specified in the `Update URI` header field.
* @type string $slug Slug of the plugin.
* @type string $version The version of the plugin.
* @type string $url The URL for details of the plugin.
* @type string $package Optional. The update ZIP for the plugin.
* @type string $tested Optional. The version of WordPress the plugin is tested against.
* @type string $requires_php Optional. The version of PHP which the plugin requires.
* @type bool $autoupdate Optional. Whether the plugin should automatically update.
* @type array $icons Optional. Array of plugin icons.
* @type array $banners Optional. Array of plugin banners.
* @type array $banners_rtl Optional. Array of plugin RTL banners.
* @type array $translations {
* Optional. List of translation updates for the plugin.
*
* @type string $language The language the translation update is for.
* @type string $version The version of the plugin this translation is for.
* This is not the version of the language file.
* @type string $updated The update timestamp of the translation file.
* Should be a date in the `YYYY-MM-DD HH:MM:SS` format.
* @type string $package The ZIP location containing the translation update.
* @type string $autoupdate Whether the translation should be automatically installed.
* }
* }
* @param array $plugin_data Plugin headers.
* @param string $plugin_file Plugin filename.
* @param string[] $locales Installed locales to look up translations for.
*/
$update = apply_filters( "update_plugins_{$hostname}", false, $plugin_data, $plugin_file, $locales );

if ( ! $update ) {
continue;
}

$update = (object) $update;

// Is it valid? We require at least a version.
if ( ! isset( $update->version ) ) {
continue;
}

// These should remain constant.
$update->id = $plugin_data['UpdateURI'];
$update->plugin = $plugin_file;

// WordPress needs the version field specified as 'new_version'.
if ( ! isset( $update->new_version ) ) {
$update->new_version = $update->version;
}

// Handle any translation updates.
if ( ! empty( $update->translations ) ) {
foreach ( $update->translations as $translation ) {
if ( isset( $translation['language'], $translation['package'] ) ) {
$translation['type'] = 'plugin';
$translation['slug'] = isset( $update->slug ) ? $update->slug : $update->id;

$updates->translations[] = $translation;
}
}
}

unset( $updates->no_update[ $plugin_file ], $updates->response[ $plugin_file ] );

if ( version_compare( $update->new_version, $plugin_data['Version'], '>' ) ) {
$updates->response[ $plugin_file ] = $update;
} else {
$updates->no_update[ $plugin_file ] = $update;
}
}

$sanitize_plugin_update_payload = static function ( &$item ) {
$item = (object) $item;

unset( $item->translations, $item->compatibility );

return $item;
};

array_walk( $updates->response, $sanitize_plugin_update_payload );
array_walk( $updates->no_update, $sanitize_plugin_update_payload );

set_site_transient( 'update_plugins', $updates );
}

/**
* Checks for available updates to themes based on the latest versions hosted on WordPress.org.
*
* Despite its name this function does not actually perform any updates, it only checks for available updates.
*
* A list of all themes installed is sent to WP, along with the site locale.
*
* Checks against the WordPress server at api.wordpress.org. Will only check
* if WordPress isn't installing.
*
* @since 2.7.0
*
* @global string $wp_version The WordPress version string.
*
* @param array $extra_stats Extra statistics to report to the WordPress.org API.
*/
function wp_update_themes( $extra_stats = array() ) {
if ( wp_installing() ) {
return;
}

$installed_themes = wp_get_themes();
$translations = wp_get_installed_translations( 'themes' );

$last_update = get_site_transient( 'update_themes' );

if ( ! is_object( $last_update ) ) {
$last_update = new stdClass();
}

$themes = array();
$checked = array();
$request = array();

// Put slug of active theme into request.
$request['active'] = get_option( 'stylesheet' );

foreach ( $installed_themes as $theme ) {
$checked[ $theme->get_stylesheet() ] = $theme->get( 'Version' );

$themes[ $theme->get_stylesheet() ] = array(
'Name' => $theme->get( 'Name' ),
'Title' => $theme->get( 'Name' ),
'Version' => $theme->get( 'Version' ),
'Author' => $theme->get( 'Author' ),
'Author URI' => $theme->get( 'AuthorURI' ),
'UpdateURI' => $theme->get( 'UpdateURI' ),
'Template' => $theme->get_template(),
'Stylesheet' => $theme->get_stylesheet(),
);
}

$doing_cron = wp_doing_cron();

// Check for update on a different schedule, depending on the page.
switch ( current_filter() ) {
case 'upgrader_process_complete':
$timeout = 0;
break;
case 'load-update-core.php':
$timeout = MINUTE_IN_SECONDS;
break;
case 'load-themes.php':
case 'load-update.php':
$timeout = HOUR_IN_SECONDS;
break;
default:
if ( $doing_cron ) {
$timeout = 2 * HOUR_IN_SECONDS;
} else {
$timeout = 12 * HOUR_IN_SECONDS;
}
}

$time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked );

if ( $time_not_changed && ! $extra_stats ) {
$theme_changed = false;

foreach ( $checked as $slug => $v ) {
if ( ! isset( $last_update->checked[ $slug ] ) || (string) $last_update->checked[ $slug ] !== (string) $v ) {
$theme_changed = true;
}
}

if ( isset( $last_update->response ) && is_array( $last_update->response ) ) {
foreach ( $last_update->response as $slug => $update_details ) {
if ( ! isset( $checked[ $slug ] ) ) {
$theme_changed = true;
break;
}
}
}

// Bail if we've checked recently and if nothing has changed.
if ( ! $theme_changed ) {
return;
}
}

// Update last_checked for current to prevent multiple blocking requests if request hangs.
$last_update->last_checked = time();
set_site_transient( 'update_themes', $last_update );

$request['themes'] = $themes;

$locales = array_values( get_available_languages() );

/**
* Filters the locales requested for theme translations.
*
* @since 3.7.0
* @since 4.5.0 The default value of the `$locales` parameter changed to include all locales.
*
* @param string[] $locales Theme locales. Default is all available locales of the site.
*/
$locales = apply_filters( 'themes_update_check_locales', $locales );
$locales = array_unique( $locales );

if ( $doing_cron ) {
$timeout = 30; // 30 seconds.
} else {
// Three seconds, plus one extra second for every 10 themes.
$timeout = 3 + (int) ( count( $themes ) / 10 );
}

$options = array(
'timeout' => $timeout,
'body' => array(
'themes' => wp_json_encode( $request ),
'translations' => wp_json_encode( $translations ),
'locale' => wp_json_encode( $locales ),
),
'user-agent' => 'WordPress/' . wp_get_wp_version() . '; ' . home_url( '/' ),
);

if ( $extra_stats ) {
$options['body']['update_stats'] = wp_json_encode( $extra_stats );
}

$url = 'http://api.wordpress.org/themes/update-check/1.1/';
$http_url = $url;
$ssl = wp_http_supports( array( 'ssl' ) );

if ( $ssl ) {
$url = set_url_scheme( $url, 'https' );
}

$raw_response = wp_remote_post( $url, $options );

if ( $ssl && is_wp_error( $raw_response ) ) {
wp_trigger_error(
__FUNCTION__,
sprintf(
/* translators: %s: Support forums URL. */
__( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="%s">support forums</a>.' ),
__( 'https://wordpress.org/support/forums/' )
) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ),
headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE
);
$raw_response = wp_remote_post( $http_url, $options );
}

if ( is_wp_error( $raw_response ) || 200 !== wp_remote_retrieve_response_code( $raw_response ) ) {
return;
}

$new_update = new stdClass();
$new_update->last_checked = time();
$new_update->checked = $checked;

$response = json_decode( wp_remote_retrieve_body( $raw_response ), true );

if ( is_array( $response ) ) {
$new_update->response = $response['themes'];
$new_update->no_update = $response['no_update'];
$new_update->translations = $response['translations'];
}

// Support updates for any themes using the `Update URI` header field.
foreach ( $themes as $theme_stylesheet => $theme_data ) {
if ( ! $theme_data['UpdateURI'] || isset( $new_update->response[ $theme_stylesheet ] ) ) {
continue;
}

$hostname = wp_parse_url( sanitize_url( $theme_data['UpdateURI'] ), PHP_URL_HOST );

/**
* Filters the update response for a given theme hostname.
*
* The dynamic portion of the hook name, `$hostname`, refers to the hostname
* of the URI specified in the `Update URI` header field.
*
* @since 6.1.0
*
* @param array|false $update {
* The theme update data with the latest details. Default false.
*
* @type string $id Optional. ID of the theme for update purposes, should be a URI
* specified in the `Update URI` header field.
* @type string $theme Directory name of the theme.
* @type string $version The version of the theme.
* @type string $url The URL for details of the theme.
* @type string $package Optional. The update ZIP for the theme.
* @type string $tested Optional. The version of WordPress the theme is tested against.
* @type string $requires_php Optional. The version of PHP which the theme requires.
* @type bool $autoupdate Optional. Whether the theme should automatically update.
* @type array $translations {
* Optional. List of translation updates for the theme.
*
* @type string $language The language the translation update is for.
* @type string $version The version of the theme this translation is for.
* This is not the version of the language file.
* @type string $updated The update timestamp of the translation file.
* Should be a date in the `YYYY-MM-DD HH:MM:SS` format.
* @type string $package The ZIP location containing the translation update.
* @type string $autoupdate Whether the translation should be automatically installed.
* }
* }
* @param array $theme_data Theme headers.
* @param string $theme_stylesheet Theme stylesheet.
* @param string[] $locales Installed locales to look up translations for.
*/
$update = apply_filters( "update_themes_{$hostname}", false, $theme_data, $theme_stylesheet, $locales );

if ( ! $update ) {
continue;
}

$update = (object) $update;

// Is it valid? We require at least a version.
if ( ! isset( $update->version ) ) {
continue;
}

// This should remain constant.
$update->id = $theme_data['UpdateURI'];

// WordPress needs the version field specified as 'new_version'.
if ( ! isset( $update->new_version ) ) {
$update->new_version = $update->version;
}

// Handle any translation updates.
if ( ! empty( $update->translations ) ) {
foreach ( $update->translations as $translation ) {
if ( isset( $translation['language'], $translation['package'] ) ) {
$translation['type'] = 'theme';
$translation['slug'] = isset( $update->theme ) ? $update->theme : $update->id;

$new_update->translations[] = $translation;
}
}
}

unset( $new_update->no_update[ $theme_stylesheet ], $new_update->response[ $theme_stylesheet ] );

if ( version_compare( $update->new_version, $theme_data['Version'], '>' ) ) {
$new_update->response[ $theme_stylesheet ] = (array) $update;
} else {
$new_update->no_update[ $theme_stylesheet ] = (array) $update;
}
}

set_site_transient( 'update_themes', $new_update );
}

/**
* Performs WordPress automatic background updates.
*
* Updates WordPress core plus any plugins and themes that have automatic updates enabled.
*
* @since 3.7.0
*/
function wp_maybe_auto_update() {
require_once ABSPATH . 'wp-admin/includes/admin.php';
require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader.php';

$upgrader = new WP_Automatic_Updater();
$upgrader->run();
}

/**
* Retrieves a list of all language updates available.
*
* @since 3.7.0
*
* @return object[] Array of translation objects that have available updates.
*/
function wp_get_translation_updates() {
$updates = array();
$transients = array(
'update_core' => 'core',
'update_plugins' => 'plugin',
'update_themes' => 'theme',
);

foreach ( $transients as $transient => $type ) {
$transient = get_site_transient( $transient );

if ( empty( $transient->translations ) ) {
continue;
}

foreach ( $transient->translations as $translation ) {
$updates[] = (object) $translation;
}
}

return $updates;
}

/**
* Collects counts and UI strings for available updates.
*
* @since 3.3.0
*
* @return array
*/
function wp_get_update_data() {
$counts = array(
'plugins' => 0,
'themes' => 0,
'wordpress' => 0,
'translations' => 0,
);

$plugins = current_user_can( 'update_plugins' );

if ( $plugins ) {
$update_plugins = get_site_transient( 'update_plugins' );

if ( ! empty( $update_plugins->response ) ) {
$counts['plugins'] = count( $update_plugins->response );
}
}

$themes = current_user_can( 'update_themes' );

if ( $themes ) {
$update_themes = get_site_transient( 'update_themes' );

if ( ! empty( $update_themes->response ) ) {
$counts['themes'] = count( $update_themes->response );
}
}

$core = current_user_can( 'update_core' );

if ( $core && function_exists( 'get_core_updates' ) ) {
$update_wordpress = get_core_updates( array( 'dismissed' => false ) );

if ( ! empty( $update_wordpress )
&& ! in_array( $update_wordpress[0]->response, array( 'development', 'latest' ), true )
&& current_user_can( 'update_core' )
) {
$counts['wordpress'] = 1;
}
}

if ( ( $core || $plugins || $themes ) && wp_get_translation_updates() ) {
$counts['translations'] = 1;
}

$counts['total'] = $counts['plugins'] + $counts['themes'] + $counts['wordpress'] + $counts['translations'];
$titles = array();

if ( $counts['wordpress'] ) {
/* translators: %d: Number of available WordPress updates. */
$titles['wordpress'] = sprintf( __( '%d WordPress Update' ), $counts['wordpress'] );
}

if ( $counts['plugins'] ) {
/* translators: %d: Number of available plugin updates. */
$titles['plugins'] = sprintf( _n( '%d Plugin Update', '%d Plugin Updates', $counts['plugins'] ), $counts['plugins'] );
}

if ( $counts['themes'] ) {
/* translators: %d: Number of available theme updates. */
$titles['themes'] = sprintf( _n( '%d Theme Update', '%d Theme Updates', $counts['themes'] ), $counts['themes'] );
}

if ( $counts['translations'] ) {
$titles['translations'] = __( 'Translation Updates' );
}

$update_title = $titles ? esc_attr( implode( ', ', $titles ) ) : '';

$update_data = array(
'counts' => $counts,
'title' => $update_title,
);
/**
* Filters the returned array of update data for plugins, themes, and WordPress core.
*
* @since 3.5.0
*
* @param array $update_data {
* Fetched update data.
*
* @type array $counts An array of counts for available plugin, theme, and WordPress updates.
* @type string $update_title Titles of available updates.
* }
* @param array $titles An array of update counts and UI strings for available updates.
*/
return apply_filters( 'wp_get_update_data', $update_data, $titles );
}

/**
* Determines whether core should be updated.
*
* @since 2.8.0
*
* @global string $wp_version The WordPress version string.
*/
function _maybe_update_core() {
$current = get_site_transient( 'update_core' );

if ( isset( $current->last_checked, $current->version_checked )
&& 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
&& wp_get_wp_version() === $current->version_checked
) {
return;
}

wp_version_check();
}
/**
* Checks the last time plugins were run before checking plugin versions.
*
* This might have been backported to WordPress 2.6.1 for performance reasons.
* This is used for the wp-admin to check only so often instead of every page
* load.
*
* @since 2.7.0
* @access private
*/
function _maybe_update_plugins() {
$current = get_site_transient( 'update_plugins' );

if ( isset( $current->last_checked )
&& 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
) {
return;
}

wp_update_plugins();
}

/**
* Checks themes versions only after a duration of time.
*
* This is for performance reasons to make sure that on the theme version
* checker is not run on every page load.
*
* @since 2.7.0
* @access private
*/
function _maybe_update_themes() {
$current = get_site_transient( 'update_themes' );

if ( isset( $current->last_checked )
&& 12 * HOUR_IN_SECONDS > ( time() - $current->last_checked )
) {
return;
}

wp_update_themes();
}

/**
* Schedules core, theme, and plugin update checks.
*
* @since 3.1.0
*/
function wp_schedule_update_checks() {
if ( ! wp_next_scheduled( 'wp_version_check' ) && ! wp_installing() ) {
wp_schedule_event( time(), 'twicedaily', 'wp_version_check' );
}

if ( ! wp_next_scheduled( 'wp_update_plugins' ) && ! wp_installing() ) {
wp_schedule_event( time(), 'twicedaily', 'wp_update_plugins' );
}

if ( ! wp_next_scheduled( 'wp_update_themes' ) && ! wp_installing() ) {
wp_schedule_event( time(), 'twicedaily', 'wp_update_themes' );
}
}

/**
* Clears existing update caches for plugins, themes, and core.
*
* @since 4.1.0
*/
function wp_clean_update_cache() {
if ( function_exists( 'wp_clean_plugins_cache' ) ) {
wp_clean_plugins_cache();
} else {
delete_site_transient( 'update_plugins' );
}

wp_clean_themes_cache();

delete_site_transient( 'update_core' );
}

/**
* Schedules the removal of all contents in the temporary backup directory.
*
* @since 6.3.0
*/
function wp_delete_all_temp_backups() {
/*
* Check if there is a lock, or if currently performing an Ajax request,
* in which case there is a chance an update is running.
* Reschedule for an hour from now and exit early.
*/
if ( get_option( 'core_updater.lock' ) || get_option( 'auto_updater.lock' ) || wp_doing_ajax() ) {
wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_delete_temp_updater_backups' );
return;
}

// This action runs on shutdown to make sure there are no plugin updates currently running.
add_action( 'shutdown', '_wp_delete_all_temp_backups' );
}

/**
* Deletes all contents in the temporary backup directory.
*
* @since 6.3.0
*
* @access private
*
* @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
*/
function _wp_delete_all_temp_backups() {
global $wp_filesystem;

if ( ! function_exists( 'WP_Filesystem' ) ) {
require_once ABSPATH . '/wp-admin/includes/file.php';
}

ob_start();
$credentials = request_filesystem_credentials( '' );
ob_end_clean();

if ( false === $credentials || ! WP_Filesystem( $credentials ) ) {
wp_trigger_error( __FUNCTION__, __( 'Could not access filesystem.' ) );
return;
}

if ( ! $wp_filesystem->wp_content_dir() ) {
wp_trigger_error(
__FUNCTION__,
/* translators: %s: Directory name. */
sprintf( __( 'Unable to locate WordPress content directory (%s).' ), 'wp-content' )
);
return;
}

$temp_backup_dir = $wp_filesystem->wp_content_dir() . 'upgrade-temp-backup/';
$dirlist = $wp_filesystem->dirlist( $temp_backup_dir );
$dirlist = $dirlist ? $dirlist : array();

foreach ( array_keys( $dirlist ) as $dir ) {
if ( '.' === $dir || '..' === $dir ) {
continue;
}

$wp_filesystem->delete( $temp_backup_dir . $dir, true );
}
}

if ( ( ! is_main_site() && ! is_network_admin() ) || wp_doing_ajax() ) {
return;
}

add_action( 'admin_init', '_maybe_update_core' );
add_action( 'wp_version_check', 'wp_version_check' );

add_action( 'load-plugins.php', 'wp_update_plugins' );
add_action( 'load-update.php', 'wp_update_plugins' );
add_action( 'load-update-core.php', 'wp_update_plugins' );
add_action( 'admin_init', '_maybe_update_plugins' );
add_action( 'wp_update_plugins', 'wp_update_plugins' );

add_action( 'load-themes.php', 'wp_update_themes' );
add_action( 'load-update.php', 'wp_update_themes' );
add_action( 'load-update-core.php', 'wp_update_themes' );
add_action( 'admin_init', '_maybe_update_themes' );
add_action( 'wp_update_themes', 'wp_update_themes' );

add_action( 'update_option_WPLANG', 'wp_clean_update_cache', 10, 0 );

add_action( 'wp_maybe_auto_update', 'wp_maybe_auto_update' );

add_action( 'init', 'wp_schedule_update_checks' );

add_action( 'wp_delete_temp_updater_backups', 'wp_delete_all_temp_backups' );