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<?php
/**
 * Upgrade API: WP_Automatic_Updater class
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 4.6.0
 */

/**
 * Core class used for handling automatic background updates.
 *
 * @since 3.7.0
 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
 */
class WP_Automatic_Updater {

/**
	 * Tracks update results during processing.
	 *
	 * @var array
	 */
	protected $update_results = array();

/**
	 * Whether the entire automatic updater is disabled.
	 *
	 * @since 3.7.0
	 */
	public function is_disabled() {
		// Background updates are disabled if you don't want file changes.
		if ( ! wp_is_file_mod_allowed( 'automatic_updater' ) )
			return true;

if ( wp_installing() )
			return true;

// More fine grained control can be done through the WP_AUTO_UPDATE_CORE constant and filters.
		$disabled = defined( 'AUTOMATIC_UPDATER_DISABLED' ) && AUTOMATIC_UPDATER_DISABLED;

/**
		 * Filters whether to entirely disable background updates.
		 *
		 * There are more fine-grained filters and controls for selective disabling.
		 * This filter parallels the AUTOMATIC_UPDATER_DISABLED constant in name.
		 *
		 * This also disables update notification emails. That may change in the future.
		 *
		 * @since 3.7.0
		 *
		 * @param bool $disabled Whether the updater should be disabled.
		 */
		return apply_filters( 'automatic_updater_disabled', $disabled );
	}

/**
	 * Check for version control checkouts.
	 *
	 * Checks for Subversion, Git, Mercurial, and Bazaar. It recursively looks up the
	 * filesystem to the top of the drive, erring on the side of detecting a VCS
	 * checkout somewhere.
	 *
	 * ABSPATH is always checked in addition to whatever $context is (which may be the
	 * wp-content directory, for example). The underlying assumption is that if you are
	 * using version control *anywhere*, then you should be making decisions for
	 * how things get updated.
	 *
	 * @since 3.7.0
	 *
	 * @param string $context The filesystem path to check, in addition to ABSPATH.
	 */
	public function is_vcs_checkout( $context ) {
		$context_dirs = array( untrailingslashit( $context ) );
		if ( $context !== ABSPATH )
			$context_dirs[] = untrailingslashit( ABSPATH );

$vcs_dirs = array( '.svn', '.git', '.hg', '.bzr' );
		$check_dirs = array();

foreach ( $context_dirs as $context_dir ) {
			// Walk up from $context_dir to the root.
			do {
				$check_dirs[] = $context_dir;

// Once we've hit '/' or 'C:\', we need to stop. dirname will keep returning the input here.
				if ( $context_dir == dirname( $context_dir ) )
					break;

// Continue one level at a time.
			} while ( $context_dir = dirname( $context_dir ) );
		}

$check_dirs = array_unique( $check_dirs );

// Search all directories we've found for evidence of version control.
		foreach ( $vcs_dirs as $vcs_dir ) {
			foreach ( $check_dirs as $check_dir ) {
				if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
					break 2;
			}
		}

/**
		 * Filters whether the automatic updater should consider a filesystem
		 * location to be potentially managed by a version control system.
		 *
		 * @since 3.7.0
		 *
		 * @param bool $checkout  Whether a VCS checkout was discovered at $context
		 *                        or ABSPATH, or anywhere higher.
		 * @param string $context The filesystem context (a path) against which
		 *                        filesystem status should be checked.
		 */
		return apply_filters( 'automatic_updates_is_vcs_checkout', $checkout, $context );
	}

/**
	 * Tests to see if we can and should update a specific item.
	 *
	 * @since 3.7.0
	 *
	 * @global wpdb $wpdb WordPress database abstraction object.
	 *
	 * @param string $type    The type of update being checked: 'core', 'theme',
	 *                        'plugin', 'translation'.
	 * @param object $item    The update offer.
	 * @param string $context The filesystem context (a path) against which filesystem
	 *                        access and status should be checked.
	 */
	public function should_update( $type, $item, $context ) {
		// Used to see if WP_Filesystem is set up to allow unattended updates.
		$skin = new Automatic_Upgrader_Skin;

if ( $this->is_disabled() )
			return false;

// Only relax the filesystem checks when the update doesn't include new files
		$allow_relaxed_file_ownership = false;
		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
			$allow_relaxed_file_ownership = true;
		}

// If we can't do an auto core update, we may still be able to email the user.
		if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) {
			if ( 'core' == $type )
				$this->send_core_update_notification_email( $item );
			return false;
		}

// Next up, is this an item we can update?
		if ( 'core' == $type )
			$update = Core_Upgrader::should_update_to_version( $item->current );
		else
			$update = ! empty( $item->autoupdate );

/**
		 * Filters whether to automatically update core, a plugin, a theme, or a language.
		 *
		 * The dynamic portion of the hook name, `$type`, refers to the type of update
		 * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
		 *
		 * Generally speaking, plugins, themes, and major core versions are not updated
		 * by default, while translations and minor and development versions for core
		 * are updated by default.
		 *
		 * See the {@see 'allow_dev_auto_core_updates', {@see 'allow_minor_auto_core_updates'},
		 * and {@see 'allow_major_auto_core_updates'} filters for a more straightforward way to
		 * adjust core updates.
		 *
		 * @since 3.7.0
		 *
		 * @param bool   $update Whether to update.
		 * @param object $item   The update offer.
		 */
		$update = apply_filters( "auto_update_{$type}", $update, $item );

if ( ! $update ) {
			if ( 'core' == $type )
				$this->send_core_update_notification_email( $item );
			return false;
		}

// If it's a core update, are we actually compatible with its requirements?
		if ( 'core' == $type ) {
			global $wpdb;

$php_compat = version_compare( phpversion(), $item->php_version, '>=' );
			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
				$mysql_compat = true;
			else
				$mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );

if ( ! $php_compat || ! $mysql_compat )
				return false;
		}

return true;
	}

/**
	 * Notifies an administrator of a core update.
	 *
	 * @since 3.7.0
	 *
	 * @param object $item The update offer.
	 */
	protected function send_core_update_notification_email( $item ) {
		$notified = get_site_option( 'auto_core_update_notified' );

// Don't notify if we've already notified the same email address of the same version.
		if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
			return false;

// See if we need to notify users of a core update.
		$notify = ! empty( $item->notify_email );

/**
		 * Filters whether to notify the site administrator of a new core update.
		 *
		 * By default, administrators are notified when the update offer received
		 * from WordPress.org sets a particular flag. This allows some discretion
		 * in if and when to notify.
		 *
		 * This filter is only evaluated once per release. If the same email address
		 * was already notified of the same new version, WordPress won't repeatedly
		 * email the administrator.
		 *
		 * This filter is also used on about.php to check if a plugin has disabled
		 * these notifications.
		 *
		 * @since 3.7.0
		 *
		 * @param bool   $notify Whether the site administrator is notified.
		 * @param object $item   The update offer.
		 */
		if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
			return false;

$this->send_email( 'manual', $item );
		return true;
	}

/**
	 * Update an item, if appropriate.
	 *
	 * @since 3.7.0
	 *
	 * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
	 * @param object $item The update offer.
	 *
	 * @return null|WP_Error
	 */
	public function update( $type, $item ) {
		$skin = new Automatic_Upgrader_Skin;

switch ( $type ) {
			case 'core':
				// The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter.
				add_filter( 'update_feedback', array( $skin, 'feedback' ) );
				$upgrader = new Core_Upgrader( $skin );
				$context  = ABSPATH;
				break;
			case 'plugin':
				$upgrader = new Plugin_Upgrader( $skin );
				$context  = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR
				break;
			case 'theme':
				$upgrader = new Theme_Upgrader( $skin );
				$context  = get_theme_root( $item->theme );
				break;
			case 'translation':
				$upgrader = new Language_Pack_Upgrader( $skin );
				$context  = WP_CONTENT_DIR; // WP_LANG_DIR;
				break;
		}

// Determine whether we can and should perform this update.
		if ( ! $this->should_update( $type, $item, $context ) )
			return false;

/**
		 * Fires immediately prior to an auto-update.
		 *
		 * @since 4.4.0
		 *
		 * @param string $type    The type of update being checked: 'core', 'theme', 'plugin', or 'translation'.
		 * @param object $item    The update offer.
		 * @param string $context The filesystem context (a path) against which filesystem access and status
		 *                        should be checked.
		 */
		do_action( 'pre_auto_update', $type, $item, $context );

$upgrader_item = $item;
		switch ( $type ) {
			case 'core':
				$skin->feedback( __( 'Updating to WordPress %s' ), $item->version );
				$item_name = sprintf( __( 'WordPress %s' ), $item->version );
				break;
			case 'theme':
				$upgrader_item = $item->theme;
				$theme = wp_get_theme( $upgrader_item );
				$item_name = $theme->Get( 'Name' );
				$skin->feedback( __( 'Updating theme: %s' ), $item_name );
				break;
			case 'plugin':
				$upgrader_item = $item->plugin;
				$plugin_data = get_plugin_data( $context . '/' . $upgrader_item );
				$item_name = $plugin_data['Name'];
				$skin->feedback( __( 'Updating plugin: %s' ), $item_name );
				break;
			case 'translation':
				$language_item_name = $upgrader->get_name_for_update( $item );
				$item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
				$skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)&#8230;' ), $language_item_name, $item->language ) );
				break;
		}

$allow_relaxed_file_ownership = false;
		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
			$allow_relaxed_file_ownership = true;
		}

// Boom, This sites about to get a whole new splash of paint!
		$upgrade_result = $upgrader->upgrade( $upgrader_item, array(
			'clear_update_cache' => false,
			// Always use partial builds if possible for core updates.
			'pre_check_md5'      => false,
			// Only available for core updates.
			'attempt_rollback'   => true,
			// Allow relaxed file ownership in some scenarios
			'allow_relaxed_file_ownership' => $allow_relaxed_file_ownership,
		) );

// If the filesystem is unavailable, false is returned.
		if ( false === $upgrade_result ) {
			$upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
		}

if ( 'core' == $type ) {
			if ( is_wp_error( $upgrade_result ) && ( 'up_to_date' == $upgrade_result->get_error_code() || 'locked' == $upgrade_result->get_error_code() ) ) {
				// These aren't actual errors, treat it as a skipped-update instead to avoid triggering the post-core update failure routines.
				return false;
			}

// Core doesn't output this, so let's append it so we don't get confused.
			if ( is_wp_error( $upgrade_result ) ) {
				$skin->error( __( 'Installation Failed' ), $upgrade_result );
			} else {
				$skin->feedback( __( 'WordPress updated successfully' ) );
			}
		}

$this->update_results[ $type ][] = (object) array(
			'item'     => $item,
			'result'   => $upgrade_result,
			'name'     => $item_name,
			'messages' => $skin->get_upgrade_messages()
		);

return $upgrade_result;
	}

/**
	 * Kicks off the background update process, looping through all pending updates.
	 *
	 * @since 3.7.0
	 */
	public function run() {
		if ( $this->is_disabled() )
			return;

if ( ! is_main_network() || ! is_main_site() )
			return;

if ( ! WP_Upgrader::create_lock( 'auto_updater' ) )
			return;

// Don't automatically run these thins, as we'll handle it ourselves
		remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
		remove_action( 'upgrader_process_complete', 'wp_version_check' );
		remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
		remove_action( 'upgrader_process_complete', 'wp_update_themes' );

// Next, Plugins
		wp_update_plugins(); // Check for Plugin updates
		$plugin_updates = get_site_transient( 'update_plugins' );
		if ( $plugin_updates && !empty( $plugin_updates->response ) ) {
			foreach ( $plugin_updates->response as $plugin ) {
				$this->update( 'plugin', $plugin );
			}
			// Force refresh of plugin update information
			wp_clean_plugins_cache();
		}

// Next, those themes we all love
		wp_update_themes();  // Check for Theme updates
		$theme_updates = get_site_transient( 'update_themes' );
		if ( $theme_updates && !empty( $theme_updates->response ) ) {
			foreach ( $theme_updates->response as $theme ) {
				$this->update( 'theme', (object) $theme );
			}
			// Force refresh of theme update information
			wp_clean_themes_cache();
		}

// Next, Process any core update
		wp_version_check(); // Check for Core updates
		$core_update = find_core_auto_update();

if ( $core_update )
			$this->update( 'core', $core_update );

// Clean up, and check for any pending translations
		// (Core_Upgrader checks for core updates)
		$theme_stats = array();
		if ( isset( $this->update_results['theme'] ) ) {
			foreach ( $this->update_results['theme'] as $upgrade ) {
				$theme_stats[ $upgrade->item->theme ] = ( true === $upgrade->result );
			}
		}
		wp_update_themes( $theme_stats );  // Check for Theme updates

$plugin_stats = array();
		if ( isset( $this->update_results['plugin'] ) ) {
			foreach ( $this->update_results['plugin'] as $upgrade ) {
				$plugin_stats[ $upgrade->item->plugin ] = ( true === $upgrade->result );
			}
		}
		wp_update_plugins( $plugin_stats ); // Check for Plugin updates

// Finally, Process any new translations
		$language_updates = wp_get_translation_updates();
		if ( $language_updates ) {
			foreach ( $language_updates as $update ) {
				$this->update( 'translation', $update );
			}

// Clear existing caches
			wp_clean_update_cache();

wp_version_check();  // check for Core updates
			wp_update_themes();  // Check for Theme updates
			wp_update_plugins(); // Check for Plugin updates
		}

// Send debugging email to admin for all development installations.
		if ( ! empty( $this->update_results ) ) {
			$development_version = false !== strpos( get_bloginfo( 'version' ), '-' );

/**
			 * Filters whether to send a debugging email for each automatic background update.
			 *
			 * @since 3.7.0
			 *
			 * @param bool $development_version By default, emails are sent if the
			 *                                  install is a development version.
			 *                                  Return false to avoid the email.
			 */
			if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) )
				$this->send_debug_email();

if ( ! empty( $this->update_results['core'] ) )
				$this->after_core_update( $this->update_results['core'][0] );

/**
			 * Fires after all automatic updates have run.
			 *
			 * @since 3.8.0
			 *
			 * @param array $update_results The results of all attempted updates.
			 */
			do_action( 'automatic_updates_complete', $this->update_results );
		}

WP_Upgrader::release_lock( 'auto_updater' );
	}

/**
	 * If we tried to perform a core update, check if we should send an email,
	 * and if we need to avoid processing future updates.
	 *
	 * @since 3.7.0
	 *
	 * @param object $update_result The result of the core update. Includes the update offer and result.
	 */
	protected function after_core_update( $update_result ) {
		$wp_version = get_bloginfo( 'version' );

$core_update = $update_result->item;
		$result      = $update_result->result;

if ( ! is_wp_error( $result ) ) {
			$this->send_email( 'success', $core_update );
			return;
		}

$error_code = $result->get_error_code();

// Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
		// We should not try to perform a background update again until there is a successful one-click update performed by the user.
		$critical = false;
		if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
			$critical = true;
		} elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
			// A rollback is only critical if it failed too.
			$critical = true;
			$rollback_result = $result->get_error_data()->rollback;
		} elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
			$critical = true;
		}

if ( $critical ) {
			$critical_data = array(
				'attempted'  => $core_update->current,
				'current'    => $wp_version,
				'error_code' => $error_code,
				'error_data' => $result->get_error_data(),
				'timestamp'  => time(),
				'critical'   => true,
			);
			if ( isset( $rollback_result ) ) {
				$critical_data['rollback_code'] = $rollback_result->get_error_code();
				$critical_data['rollback_data'] = $rollback_result->get_error_data();
			}
			update_site_option( 'auto_core_update_failed', $critical_data );
			$this->send_email( 'critical', $core_update, $result );
			return;
		}

/*
		 * Any other WP_Error code (like download_failed or files_not_writable) occurs before
		 * we tried to copy over core files. Thus, the failures are early and graceful.
		 *
		 * We should avoid trying to perform a background update again for the same version.
		 * But we can try again if another version is released.
		 *
		 * For certain 'transient' failures, like download_failed, we should allow retries.
		 * In fact, let's schedule a special update for an hour from now. (It's possible
		 * the issue could actually be on WordPress.org's side.) If that one fails, then email.
		 */
		$send = true;
  		$transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro', 'locked' );
  		if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
  			wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
  			$send = false;
  		}

$n = get_site_option( 'auto_core_update_notified' );
		// Don't notify if we've already notified the same email address of the same version of the same notification type.
		if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
			$send = false;

update_site_option( 'auto_core_update_failed', array(
			'attempted'  => $core_update->current,
			'current'    => $wp_version,
			'error_code' => $error_code,
			'error_data' => $result->get_error_data(),
			'timestamp'  => time(),
			'retry'      => in_array( $error_code, $transient_failures ),
		) );

if ( $send )
			$this->send_email( 'fail', $core_update, $result );
	}

/**
	 * Sends an email upon the completion or failure of a background core update.
	 *
	 * @since 3.7.0
	 *
	 * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
	 * @param object $core_update The update offer that was attempted.
	 * @param mixed  $result      Optional. The result for the core update. Can be WP_Error.
	 */
	protected function send_email( $type, $core_update, $result = null ) {
		update_site_option( 'auto_core_update_notified', array(
			'type'      => $type,
			'email'     => get_site_option( 'admin_email' ),
			'version'   => $core_update->current,
			'timestamp' => time(),
		) );

$next_user_core_update = get_preferred_from_update_core();
		// If the update transient is empty, use the update we just performed
		if ( ! $next_user_core_update )
			$next_user_core_update = $core_update;
		$newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );

/**
		 * Filters whether to send an email following an automatic background core update.
		 *
		 * @since 3.7.0
		 *
		 * @param bool   $send        Whether to send the email. Default true.
		 * @param string $type        The type of email to send. Can be one of
		 *                            'success', 'fail', 'critical'.
		 * @param object $core_update The update offer that was attempted.
		 * @param mixed  $result      The result for the core update. Can be WP_Error.
		 */
		if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
			return;

switch ( $type ) {
			case 'success' : // We updated.
				/* translators: 1: Site name, 2: WordPress version number. */
				$subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
				break;

case 'fail' :   // We tried to update but couldn't.
			case 'manual' : // We can't update (and made no attempt).
				/* translators: 1: Site name, 2: WordPress version number. */
				$subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
				break;

case 'critical' : // We tried to update, started to copy files, then things went wrong.
				/* translators: 1: Site name. */
				$subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
				break;

default :
				return;
		}

// If the auto update is not to the latest version, say that the current version of WP is available instead.
		$version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
		$subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );

$body = '';

switch ( $type ) {
			case 'success' :
				$body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
				$body .= "\n\n";
				if ( ! $newer_version_available )
					$body .= __( 'No further action is needed on your part.' ) . ' ';

// Can only reference the About screen if their update was successful.
				list( $about_version ) = explode( '-', $core_update->current, 2 );
				$body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
				$body .= "\n" . admin_url( 'about.php' );

if ( $newer_version_available ) {
					$body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
					$body .= __( 'Updating is easy and only takes a few moments:' );
					$body .= "\n" . network_admin_url( 'update-core.php' );
				}

break;

case 'fail' :
			case 'manual' :
				$body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );

$body .= "\n\n";

// Don't show this message if there is a newer version available.
				// Potential for confusion, and also not useful for them to know at this point.
				if ( 'fail' == $type && ! $newer_version_available )
					$body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';

$body .= __( 'Updating is easy and only takes a few moments:' );
				$body .= "\n" . network_admin_url( 'update-core.php' );
				break;

case 'critical' :
				if ( $newer_version_available )
					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
				else
					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );

$body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );

$body .= "\n\n" . __( "Please check out your site now. It's possible that everything is working. If it says you need to update, you should do so:" );
				$body .= "\n" . network_admin_url( 'update-core.php' );
				break;
		}

$critical_support = 'critical' === $type && ! empty( $core_update->support_email );
		if ( $critical_support ) {
			// Support offer if available.
			$body .= "\n\n" . sprintf( __( "The WordPress team is willing to help you. Forward this email to %s and the team will work with you to make sure your site is working." ), $core_update->support_email );
		} else {
			// Add a note about the support forums.
			$body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
			$body .= "\n" . __( 'https://wordpress.org/support/' );
		}

// Updates are important!
		if ( $type != 'success' || $newer_version_available ) {
			$body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
		}

if ( $critical_support ) {
			$body .= " " . __( "If you reach out to us, we'll also ensure you'll never have this problem again." );
		}

// If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
		if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
			$body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
			$body .= "\n" . network_admin_url();
		}

$body .= "\n\n" . __( 'The WordPress Team' ) . "\n";

if ( 'critical' == $type && is_wp_error( $result ) ) {
			$body .= "\n***\n\n";
			$body .= sprintf( __( 'Your site was running version %s.' ), get_bloginfo( 'version' ) );
			$body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
			$body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );

// If we had a rollback and we're still critical, then the rollback failed too.
			// Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
			if ( 'rollback_was_required' == $result->get_error_code() )
				$errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
			else
				$errors = array( $result );

foreach ( $errors as $error ) {
				if ( ! is_wp_error( $error ) )
					continue;
				$error_code = $error->get_error_code();
				$body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
				if ( 'rollback_was_required' == $error_code )
					continue;
				if ( $error->get_error_message() )
					$body .= "\n" . $error->get_error_message();
				$error_data = $error->get_error_data();
				if ( $error_data )
					$body .= "\n" . implode( ', ', (array) $error_data );
			}
			$body .= "\n";
		}

$to  = get_site_option( 'admin_email' );
		$headers = '';

$email = compact( 'to', 'subject', 'body', 'headers' );

/**
		 * Filters the email sent following an automatic background core update.
		 *
		 * @since 3.7.0
		 *
		 * @param array $email {
		 *     Array of email arguments that will be passed to wp_mail().
		 *
		 *     @type string $to      The email recipient. An array of emails
		 *                            can be returned, as handled by wp_mail().
		 *     @type string $subject The email's subject.
		 *     @type string $body    The email message body.
		 *     @type string $headers Any email headers, defaults to no headers.
		 * }
		 * @param string $type        The type of email being sent. Can be one of
		 *                            'success', 'fail', 'manual', 'critical'.
		 * @param object $core_update The update offer that was attempted.
		 * @param mixed  $result      The result for the core update. Can be WP_Error.
		 */
		$email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );

wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
	}

/**
	 * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
	 *
	 * @since 3.7.0
	 */
	protected function send_debug_email() {
		$update_count = 0;
		foreach ( $this->update_results as $type => $updates )
			$update_count += count( $updates );

$body = array();
		$failures = 0;

$body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );

// Core
		if ( isset( $this->update_results['core'] ) ) {
			$result = $this->update_results['core'][0];
			if ( $result->result && ! is_wp_error( $result->result ) ) {
				$body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
			} else {
				$body[] = sprintf( __( 'FAILED: WordPress failed to update to %s' ), $result->name );
				$failures++;
			}
			$body[] = '';
		}

// Plugins, Themes, Translations
		foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
			if ( ! isset( $this->update_results[ $type ] ) )
				continue;
			$success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
			if ( $success_items ) {
				$messages = array(
					'plugin'      => __( 'The following plugins were successfully updated:' ),
					'theme'       => __( 'The following themes were successfully updated:' ),
					'translation' => __( 'The following translations were successfully updated:' ),
				);

$body[] = $messages[ $type ];
				foreach ( wp_list_pluck( $success_items, 'name' ) as $name ) {
					$body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
				}
			}
			if ( $success_items != $this->update_results[ $type ] ) {
				// Failed updates
				$messages = array(
					'plugin'      => __( 'The following plugins failed to update:' ),
					'theme'       => __( 'The following themes failed to update:' ),
					'translation' => __( 'The following translations failed to update:' ),
				);

$body[] = $messages[ $type ];
				foreach ( $this->update_results[ $type ] as $item ) {
					if ( ! $item->result || is_wp_error( $item->result ) ) {
						$body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
						$failures++;
					}
				}
			}
			$body[] = '';
		}

$site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
		if ( $failures ) {
			$body[] = trim( __(
"BETA TESTING?
=============

This debugging email is sent when you are using a development version of WordPress.

If you think these failures might be due to a bug in WordPress, could you report it?
 * Open a thread in the support forums: https://wordpress.org/support/forum/alphabeta
 * Or, if you're comfortable writing a bug report: https://core.trac.wordpress.org/

Thanks! -- The WordPress Team" ) );
			$body[] = '';

$subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
		} else {
			$subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
		}

$body[] = trim( __(
'UPDATE LOG
==========' ) );
		$body[] = '';

foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
			if ( ! isset( $this->update_results[ $type ] ) )
				continue;
			foreach ( $this->update_results[ $type ] as $update ) {
				$body[] = $update->name;
				$body[] = str_repeat( '-', strlen( $update->name ) );
				foreach ( $update->messages as $message )
					$body[] = "  " . html_entity_decode( str_replace( '&#8230;', '...', $message ) );
				if ( is_wp_error( $update->result ) ) {
					$results = array( 'update' => $update->result );
					// If we rolled back, we want to know an error that occurred then too.
					if ( 'rollback_was_required' === $update->result->get_error_code() )
						$results = (array) $update->result->get_error_data();
					foreach ( $results as $result_type => $result ) {
						if ( ! is_wp_error( $result ) )
							continue;

if ( 'rollback' === $result_type ) {
							/* translators: 1: Error code, 2: Error message. */
							$body[] = '  ' . sprintf( __( 'Rollback Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
						} else {
							/* translators: 1: Error code, 2: Error message. */
							$body[] = '  ' . sprintf( __( 'Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
						}

if ( $result->get_error_data() )
							$body[] = '         ' . implode( ', ', (array) $result->get_error_data() );
					}
				}
				$body[] = '';
			}
		}

$email = array(
			'to'      => get_site_option( 'admin_email' ),
			'subject' => $subject,
			'body'    => implode( "\n", $body ),
			'headers' => ''
		);

/**
		 * Filters the debug email that can be sent following an automatic
		 * background core update.
		 *
		 * @since 3.8.0
		 *
		 * @param array $email {
		 *     Array of email arguments that will be passed to wp_mail().
		 *
		 *     @type string $to      The email recipient. An array of emails
		 *                           can be returned, as handled by wp_mail().
		 *     @type string $subject Email subject.
		 *     @type string $body    Email message body.
		 *     @type string $headers Any email headers. Default empty.
		 * }
		 * @param int   $failures The number of failures encountered while upgrading.
		 * @param mixed $results  The results of all attempted updates.
		 */
		$email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );

wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
	}
}

Nama File / Folder	Size	Action
admin-filters.php	6.676KB	Edit File Delete File Rename
admin.php	2.879KB	Edit File Delete File Rename
ajax-actions.php	125.452KB	Edit File Delete File Rename
class-automatic-upgrader-skin.php	3.027KB	Edit File Delete File Rename
class-bulk-theme-upgrader-skin.php	1.895KB	Edit File Delete File Rename
class-bulk-upgrader-skin.php	5.078KB	Edit File Delete File Rename
class-core-upgrader.php	13.071KB	Edit File Delete File Rename
class-file-upload-upgrader.php	3.181KB	Edit File Delete File Rename
class-ftp-pure.php	5.272KB	Edit File Delete File Rename
class-ftp-sockets.php	8.25KB	Edit File Delete File Rename
class-language-pack-upgrader-skin.php	2.133KB	Edit File Delete File Rename
class-language-pack-upgrader.php	10.806KB	Edit File Delete File Rename
class-pclzip.php	191.206KB	Edit File Delete File Rename
class-plugin-installer-skin.php	4.205KB	Edit File Delete File Rename
class-plugin-upgrader-skin.php	2.496KB	Edit File Delete File Rename
class-plugin-upgrader.php	14.319KB	Edit File Delete File Rename
class-theme-installer-skin.php	3.985KB	Edit File Delete File Rename
class-theme-upgrader-skin.php	3.344KB	Edit File Delete File Rename
class-theme-upgrader.php	19.043KB	Edit File Delete File Rename
class-walker-category-checklist.php	4.115KB	Edit File Delete File Rename
class-walker-nav-menu-checklist.php	4.813KB	Edit File Delete File Rename
class-wp-automatic-updater.php	33.234KB	Edit File Delete File Rename
class-wp-comments-list-table.php	25.037KB	Edit File Delete File Rename
class-wp-filesystem-base.php	21.664KB	Edit File Delete File Rename
class-wp-filesystem-direct.php	10.959KB	Edit File Delete File Rename
class-wp-filesystem-ftpext.php	13.149KB	Edit File Delete File Rename
class-wp-filesystem-ftpsockets.php	10.338KB	Edit File Delete File Rename
class-wp-filesystem-ssh2.php	14.612KB	Edit File Delete File Rename
class-wp-importer.php	7.17KB	Edit File Delete File Rename
class-wp-internal-pointers.php	5.392KB	Edit File Delete File Rename
class-wp-links-list-table.php	7.424KB	Edit File Delete File Rename
class-wp-list-table-compat.php	1.043KB	Edit File Delete File Rename
class-wp-list-table.php	36.465KB	Edit File Delete File Rename
class-wp-media-list-table.php	22.11KB	Edit File Delete File Rename
class-wp-ms-sites-list-table.php	15.191KB	Edit File Delete File Rename
class-wp-ms-themes-list-table.php	19.758KB	Edit File Delete File Rename
class-wp-ms-users-list-table.php	12.541KB	Edit File Delete File Rename
class-wp-plugin-install-list-table.php	18.895KB	Edit File Delete File Rename
class-wp-plugins-list-table.php	32.049KB	Edit File Delete File Rename
class-wp-post-comments-list-table.php	1.438KB	Edit File Delete File Rename
class-wp-posts-list-table.php	51.479KB	Edit File Delete File Rename
class-wp-screen.php	33.513KB	Edit File Delete File Rename
class-wp-site-icon.php	5.901KB	Edit File Delete File Rename
class-wp-terms-list-table.php	17.536KB	Edit File Delete File Rename
class-wp-theme-install-list-table.php	14.184KB	Edit File Delete File Rename
class-wp-themes-list-table.php	9.05KB	Edit File Delete File Rename
class-wp-upgrader-skin.php	4.942KB	Edit File Delete File Rename
class-wp-upgrader-stat.php	0.367KB	Edit File Delete File Rename
class-wp-upgrader.php	33.118KB	Edit File Delete File Rename
class-wp-users-list-table.php	16.877KB	Edit File Delete File Rename
comment.php	5.592KB	Edit File Delete File Rename
continents-cities.php	19.042KB	Edit File Delete File Rename
credits.php	2.141KB	Edit File Delete File Rename
dashboard.php	55.677KB	Edit File Delete File Rename
deprecated.php	38.255KB	Edit File Delete File Rename
edit-tag-messages.php	1.378KB	Edit File Delete File Rename
export.php	22.428KB	Edit File Delete File Rename
file.php	80.229KB	Edit File Delete File Rename
image-edit.php	32.767KB	Edit File Delete File Rename
image.php	21.579KB	Edit File Delete File Rename
import-queue.php	0.978KB	Edit File Delete File Rename
import.php	6.1KB	Edit File Delete File Rename
list-table.php	2.586KB	Edit File Delete File Rename
media.php	103.831KB	Edit File Delete File Rename
menu.php	8.511KB	Edit File Delete File Rename
meta-boxes.php	51.001KB	Edit File Delete File Rename
misc.php	61.826KB	Edit File Delete File Rename
ms-admin-filters.php	1.354KB	Edit File Delete File Rename
ms-deprecated.php	2.793KB	Edit File Delete File Rename
ms.php	34.576KB	Edit File Delete File Rename
nav-menu.php	41.474KB	Edit File Delete File Rename
network.php	23.319KB	Edit File Delete File Rename
noop.php	1.193KB	Edit File Delete File Rename
options.php	3.742KB	Edit File Delete File Rename
plugin-install.php	30.957KB	Edit File Delete File Rename
post.php	58.729KB	Edit File Delete File Rename
revision.php	14.597KB	Edit File Delete File Rename
schema.php	35.331KB	Edit File Delete File Rename
screen.php	6.004KB	Edit File Delete File Rename
taxonomy.php	7.546KB	Edit File Delete File Rename
template.php	78.074KB	Edit File Delete File Rename
theme-install.php	6.139KB	Edit File Delete File Rename
theme.php	27.67KB	Edit File Delete File Rename
translation-install.php	8.351KB	Edit File Delete File Rename
update-core.php	54.463KB	Edit File Delete File Rename
update.php	25.267KB	Edit File Delete File Rename
upgrade.php	93.633KB	Edit File Delete File Rename
user.php	48.255KB	Edit File Delete File Rename
widgets.php	9.767KB	Edit File Delete File Rename