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/wordpress-dev/wp-admin/includes/class-wp-automatic-updater.php

https://github.com/scottbale/kirkwoodcoc
PHP | 913 lines | 498 code | 116 blank | 299 comment | 135 complexity | 686ed64faef1e7b8f3724cb856304c48 MD5 | raw file
  1<?php
  2/**
  3 * Upgrade API: WP_Automatic_Updater class
  4 *
  5 * @package WordPress
  6 * @subpackage Upgrader
  7 * @since 4.6.0
  8 */
  9
 10/**
 11 * Core class used for handling automatic background updates.
 12 *
 13 * @since 3.7.0
 14 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
 15 */
 16class WP_Automatic_Updater {
 17
 18	/**
 19	 * Tracks update results during processing.
 20	 *
 21	 * @var array
 22	 */
 23	protected $update_results = array();
 24
 25	/**
 26	 * Whether the entire automatic updater is disabled.
 27	 *
 28	 * @since 3.7.0
 29	 */
 30	public function is_disabled() {
 31		// Background updates are disabled if you don't want file changes.
 32		if ( ! wp_is_file_mod_allowed( 'automatic_updater' ) )
 33			return true;
 34
 35		if ( wp_installing() )
 36			return true;
 37
 38		// More fine grained control can be done through the WP_AUTO_UPDATE_CORE constant and filters.
 39		$disabled = defined( 'AUTOMATIC_UPDATER_DISABLED' ) && AUTOMATIC_UPDATER_DISABLED;
 40
 41		/**
 42		 * Filters whether to entirely disable background updates.
 43		 *
 44		 * There are more fine-grained filters and controls for selective disabling.
 45		 * This filter parallels the AUTOMATIC_UPDATER_DISABLED constant in name.
 46		 *
 47		 * This also disables update notification emails. That may change in the future.
 48		 *
 49		 * @since 3.7.0
 50		 *
 51		 * @param bool $disabled Whether the updater should be disabled.
 52		 */
 53		return apply_filters( 'automatic_updater_disabled', $disabled );
 54	}
 55
 56	/**
 57	 * Check for version control checkouts.
 58	 *
 59	 * Checks for Subversion, Git, Mercurial, and Bazaar. It recursively looks up the
 60	 * filesystem to the top of the drive, erring on the side of detecting a VCS
 61	 * checkout somewhere.
 62	 *
 63	 * ABSPATH is always checked in addition to whatever $context is (which may be the
 64	 * wp-content directory, for example). The underlying assumption is that if you are
 65	 * using version control *anywhere*, then you should be making decisions for
 66	 * how things get updated.
 67	 *
 68	 * @since 3.7.0
 69	 *
 70	 * @param string $context The filesystem path to check, in addition to ABSPATH.
 71	 */
 72	public function is_vcs_checkout( $context ) {
 73		$context_dirs = array( untrailingslashit( $context ) );
 74		if ( $context !== ABSPATH )
 75			$context_dirs[] = untrailingslashit( ABSPATH );
 76
 77		$vcs_dirs = array( '.svn', '.git', '.hg', '.bzr' );
 78		$check_dirs = array();
 79
 80		foreach ( $context_dirs as $context_dir ) {
 81			// Walk up from $context_dir to the root.
 82			do {
 83				$check_dirs[] = $context_dir;
 84
 85				// Once we've hit '/' or 'C:\', we need to stop. dirname will keep returning the input here.
 86				if ( $context_dir == dirname( $context_dir ) )
 87					break;
 88
 89			// Continue one level at a time.
 90			} while ( $context_dir = dirname( $context_dir ) );
 91		}
 92
 93		$check_dirs = array_unique( $check_dirs );
 94
 95		// Search all directories we've found for evidence of version control.
 96		foreach ( $vcs_dirs as $vcs_dir ) {
 97			foreach ( $check_dirs as $check_dir ) {
 98				if ( $checkout = @is_dir( rtrim( $check_dir, '\\/' ) . "/$vcs_dir" ) )
 99					break 2;
100			}
101		}
102
103		/**
104		 * Filters whether the automatic updater should consider a filesystem
105		 * location to be potentially managed by a version control system.
106		 *
107		 * @since 3.7.0
108		 *
109		 * @param bool $checkout  Whether a VCS checkout was discovered at $context
110		 *                        or ABSPATH, or anywhere higher.
111		 * @param string $context The filesystem context (a path) against which
112		 *                        filesystem status should be checked.
113		 */
114		return apply_filters( 'automatic_updates_is_vcs_checkout', $checkout, $context );
115	}
116
117	/**
118	 * Tests to see if we can and should update a specific item.
119	 *
120	 * @since 3.7.0
121	 *
122	 * @global wpdb $wpdb WordPress database abstraction object.
123	 *
124	 * @param string $type    The type of update being checked: 'core', 'theme',
125	 *                        'plugin', 'translation'.
126	 * @param object $item    The update offer.
127	 * @param string $context The filesystem context (a path) against which filesystem
128	 *                        access and status should be checked.
129	 */
130	public function should_update( $type, $item, $context ) {
131		// Used to see if WP_Filesystem is set up to allow unattended updates.
132		$skin = new Automatic_Upgrader_Skin;
133
134		if ( $this->is_disabled() )
135			return false;
136
137		// Only relax the filesystem checks when the update doesn't include new files
138		$allow_relaxed_file_ownership = false;
139		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
140			$allow_relaxed_file_ownership = true;
141		}
142
143		// If we can't do an auto core update, we may still be able to email the user.
144		if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) {
145			if ( 'core' == $type )
146				$this->send_core_update_notification_email( $item );
147			return false;
148		}
149
150		// Next up, is this an item we can update?
151		if ( 'core' == $type )
152			$update = Core_Upgrader::should_update_to_version( $item->current );
153		else
154			$update = ! empty( $item->autoupdate );
155
156		/**
157		 * Filters whether to automatically update core, a plugin, a theme, or a language.
158		 *
159		 * The dynamic portion of the hook name, `$type`, refers to the type of update
160		 * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
161		 *
162		 * Generally speaking, plugins, themes, and major core versions are not updated
163		 * by default, while translations and minor and development versions for core
164		 * are updated by default.
165		 *
166		 * See the {@see 'allow_dev_auto_core_updates', {@see 'allow_minor_auto_core_updates'},
167		 * and {@see 'allow_major_auto_core_updates'} filters for a more straightforward way to
168		 * adjust core updates.
169		 *
170		 * @since 3.7.0
171		 *
172		 * @param bool   $update Whether to update.
173		 * @param object $item   The update offer.
174		 */
175		$update = apply_filters( "auto_update_{$type}", $update, $item );
176
177		if ( ! $update ) {
178			if ( 'core' == $type )
179				$this->send_core_update_notification_email( $item );
180			return false;
181		}
182
183		// If it's a core update, are we actually compatible with its requirements?
184		if ( 'core' == $type ) {
185			global $wpdb;
186
187			$php_compat = version_compare( phpversion(), $item->php_version, '>=' );
188			if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
189				$mysql_compat = true;
190			else
191				$mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );
192
193			if ( ! $php_compat || ! $mysql_compat )
194				return false;
195		}
196
197		return true;
198	}
199
200	/**
201	 * Notifies an administrator of a core update.
202	 *
203	 * @since 3.7.0
204	 *
205	 * @param object $item The update offer.
206	 */
207	protected function send_core_update_notification_email( $item ) {
208		$notified = get_site_option( 'auto_core_update_notified' );
209
210		// Don't notify if we've already notified the same email address of the same version.
211		if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
212			return false;
213
214		// See if we need to notify users of a core update.
215		$notify = ! empty( $item->notify_email );
216
217		/**
218		 * Filters whether to notify the site administrator of a new core update.
219		 *
220		 * By default, administrators are notified when the update offer received
221		 * from WordPress.org sets a particular flag. This allows some discretion
222		 * in if and when to notify.
223		 *
224		 * This filter is only evaluated once per release. If the same email address
225		 * was already notified of the same new version, WordPress won't repeatedly
226		 * email the administrator.
227		 *
228		 * This filter is also used on about.php to check if a plugin has disabled
229		 * these notifications.
230		 *
231		 * @since 3.7.0
232		 *
233		 * @param bool   $notify Whether the site administrator is notified.
234		 * @param object $item   The update offer.
235		 */
236		if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
237			return false;
238
239		$this->send_email( 'manual', $item );
240		return true;
241	}
242
243	/**
244	 * Update an item, if appropriate.
245	 *
246	 * @since 3.7.0
247	 *
248	 * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
249	 * @param object $item The update offer.
250	 *
251	 * @return null|WP_Error
252	 */
253	public function update( $type, $item ) {
254		$skin = new Automatic_Upgrader_Skin;
255
256		switch ( $type ) {
257			case 'core':
258				// The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter.
259				add_filter( 'update_feedback', array( $skin, 'feedback' ) );
260				$upgrader = new Core_Upgrader( $skin );
261				$context  = ABSPATH;
262				break;
263			case 'plugin':
264				$upgrader = new Plugin_Upgrader( $skin );
265				$context  = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR
266				break;
267			case 'theme':
268				$upgrader = new Theme_Upgrader( $skin );
269				$context  = get_theme_root( $item->theme );
270				break;
271			case 'translation':
272				$upgrader = new Language_Pack_Upgrader( $skin );
273				$context  = WP_CONTENT_DIR; // WP_LANG_DIR;
274				break;
275		}
276
277		// Determine whether we can and should perform this update.
278		if ( ! $this->should_update( $type, $item, $context ) )
279			return false;
280
281		/**
282		 * Fires immediately prior to an auto-update.
283		 *
284		 * @since 4.4.0
285		 *
286		 * @param string $type    The type of update being checked: 'core', 'theme', 'plugin', or 'translation'.
287		 * @param object $item    The update offer.
288		 * @param string $context The filesystem context (a path) against which filesystem access and status
289		 *                        should be checked.
290		 */
291		do_action( 'pre_auto_update', $type, $item, $context );
292
293		$upgrader_item = $item;
294		switch ( $type ) {
295			case 'core':
296				$skin->feedback( __( 'Updating to WordPress %s' ), $item->version );
297				$item_name = sprintf( __( 'WordPress %s' ), $item->version );
298				break;
299			case 'theme':
300				$upgrader_item = $item->theme;
301				$theme = wp_get_theme( $upgrader_item );
302				$item_name = $theme->Get( 'Name' );
303				$skin->feedback( __( 'Updating theme: %s' ), $item_name );
304				break;
305			case 'plugin':
306				$upgrader_item = $item->plugin;
307				$plugin_data = get_plugin_data( $context . '/' . $upgrader_item );
308				$item_name = $plugin_data['Name'];
309				$skin->feedback( __( 'Updating plugin: %s' ), $item_name );
310				break;
311			case 'translation':
312				$language_item_name = $upgrader->get_name_for_update( $item );
313				$item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
314				$skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)&#8230;' ), $language_item_name, $item->language ) );
315				break;
316		}
317
318		$allow_relaxed_file_ownership = false;
319		if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
320			$allow_relaxed_file_ownership = true;
321		}
322
323		// Boom, This sites about to get a whole new splash of paint!
324		$upgrade_result = $upgrader->upgrade( $upgrader_item, array(
325			'clear_update_cache' => false,
326			// Always use partial builds if possible for core updates.
327			'pre_check_md5'      => false,
328			// Only available for core updates.
329			'attempt_rollback'   => true,
330			// Allow relaxed file ownership in some scenarios
331			'allow_relaxed_file_ownership' => $allow_relaxed_file_ownership,
332		) );
333
334		// If the filesystem is unavailable, false is returned.
335		if ( false === $upgrade_result ) {
336			$upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
337		}
338
339		if ( 'core' == $type ) {
340			if ( is_wp_error( $upgrade_result ) && ( 'up_to_date' == $upgrade_result->get_error_code() || 'locked' == $upgrade_result->get_error_code() ) ) {
341				// These aren't actual errors, treat it as a skipped-update instead to avoid triggering the post-core update failure routines.
342				return false;
343			}
344
345			// Core doesn't output this, so let's append it so we don't get confused.
346			if ( is_wp_error( $upgrade_result ) ) {
347				$skin->error( __( 'Installation Failed' ), $upgrade_result );
348			} else {
349				$skin->feedback( __( 'WordPress updated successfully' ) );
350			}
351		}
352
353		$this->update_results[ $type ][] = (object) array(
354			'item'     => $item,
355			'result'   => $upgrade_result,
356			'name'     => $item_name,
357			'messages' => $skin->get_upgrade_messages()
358		);
359
360		return $upgrade_result;
361	}
362
363	/**
364	 * Kicks off the background update process, looping through all pending updates.
365	 *
366	 * @since 3.7.0
367	 */
368	public function run() {
369		if ( $this->is_disabled() )
370			return;
371
372		if ( ! is_main_network() || ! is_main_site() )
373			return;
374
375		if ( ! WP_Upgrader::create_lock( 'auto_updater' ) )
376			return;
377
378		// Don't automatically run these thins, as we'll handle it ourselves
379		remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
380		remove_action( 'upgrader_process_complete', 'wp_version_check' );
381		remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
382		remove_action( 'upgrader_process_complete', 'wp_update_themes' );
383
384		// Next, Plugins
385		wp_update_plugins(); // Check for Plugin updates
386		$plugin_updates = get_site_transient( 'update_plugins' );
387		if ( $plugin_updates && !empty( $plugin_updates->response ) ) {
388			foreach ( $plugin_updates->response as $plugin ) {
389				$this->update( 'plugin', $plugin );
390			}
391			// Force refresh of plugin update information
392			wp_clean_plugins_cache();
393		}
394
395		// Next, those themes we all love
396		wp_update_themes();  // Check for Theme updates
397		$theme_updates = get_site_transient( 'update_themes' );
398		if ( $theme_updates && !empty( $theme_updates->response ) ) {
399			foreach ( $theme_updates->response as $theme ) {
400				$this->update( 'theme', (object) $theme );
401			}
402			// Force refresh of theme update information
403			wp_clean_themes_cache();
404		}
405
406		// Next, Process any core update
407		wp_version_check(); // Check for Core updates
408		$core_update = find_core_auto_update();
409
410		if ( $core_update )
411			$this->update( 'core', $core_update );
412
413		// Clean up, and check for any pending translations
414		// (Core_Upgrader checks for core updates)
415		$theme_stats = array();
416		if ( isset( $this->update_results['theme'] ) ) {
417			foreach ( $this->update_results['theme'] as $upgrade ) {
418				$theme_stats[ $upgrade->item->theme ] = ( true === $upgrade->result );
419			}
420		}
421		wp_update_themes( $theme_stats );  // Check for Theme updates
422
423		$plugin_stats = array();
424		if ( isset( $this->update_results['plugin'] ) ) {
425			foreach ( $this->update_results['plugin'] as $upgrade ) {
426				$plugin_stats[ $upgrade->item->plugin ] = ( true === $upgrade->result );
427			}
428		}
429		wp_update_plugins( $plugin_stats ); // Check for Plugin updates
430
431		// Finally, Process any new translations
432		$language_updates = wp_get_translation_updates();
433		if ( $language_updates ) {
434			foreach ( $language_updates as $update ) {
435				$this->update( 'translation', $update );
436			}
437
438			// Clear existing caches
439			wp_clean_update_cache();
440
441			wp_version_check();  // check for Core updates
442			wp_update_themes();  // Check for Theme updates
443			wp_update_plugins(); // Check for Plugin updates
444		}
445
446		// Send debugging email to admin for all development installations.
447		if ( ! empty( $this->update_results ) ) {
448			$development_version = false !== strpos( get_bloginfo( 'version' ), '-' );
449
450			/**
451			 * Filters whether to send a debugging email for each automatic background update.
452			 *
453			 * @since 3.7.0
454			 *
455			 * @param bool $development_version By default, emails are sent if the
456			 *                                  install is a development version.
457			 *                                  Return false to avoid the email.
458			 */
459			if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) )
460				$this->send_debug_email();
461
462			if ( ! empty( $this->update_results['core'] ) )
463				$this->after_core_update( $this->update_results['core'][0] );
464
465			/**
466			 * Fires after all automatic updates have run.
467			 *
468			 * @since 3.8.0
469			 *
470			 * @param array $update_results The results of all attempted updates.
471			 */
472			do_action( 'automatic_updates_complete', $this->update_results );
473		}
474
475		WP_Upgrader::release_lock( 'auto_updater' );
476	}
477
478	/**
479	 * If we tried to perform a core update, check if we should send an email,
480	 * and if we need to avoid processing future updates.
481	 *
482	 * @since 3.7.0
483	 *
484	 * @param object $update_result The result of the core update. Includes the update offer and result.
485	 */
486	protected function after_core_update( $update_result ) {
487		$wp_version = get_bloginfo( 'version' );
488
489		$core_update = $update_result->item;
490		$result      = $update_result->result;
491
492		if ( ! is_wp_error( $result ) ) {
493			$this->send_email( 'success', $core_update );
494			return;
495		}
496
497		$error_code = $result->get_error_code();
498
499		// Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
500		// We should not try to perform a background update again until there is a successful one-click update performed by the user.
501		$critical = false;
502		if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
503			$critical = true;
504		} elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
505			// A rollback is only critical if it failed too.
506			$critical = true;
507			$rollback_result = $result->get_error_data()->rollback;
508		} elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
509			$critical = true;
510		}
511
512		if ( $critical ) {
513			$critical_data = array(
514				'attempted'  => $core_update->current,
515				'current'    => $wp_version,
516				'error_code' => $error_code,
517				'error_data' => $result->get_error_data(),
518				'timestamp'  => time(),
519				'critical'   => true,
520			);
521			if ( isset( $rollback_result ) ) {
522				$critical_data['rollback_code'] = $rollback_result->get_error_code();
523				$critical_data['rollback_data'] = $rollback_result->get_error_data();
524			}
525			update_site_option( 'auto_core_update_failed', $critical_data );
526			$this->send_email( 'critical', $core_update, $result );
527			return;
528		}
529
530		/*
531		 * Any other WP_Error code (like download_failed or files_not_writable) occurs before
532		 * we tried to copy over core files. Thus, the failures are early and graceful.
533		 *
534		 * We should avoid trying to perform a background update again for the same version.
535		 * But we can try again if another version is released.
536		 *
537		 * For certain 'transient' failures, like download_failed, we should allow retries.
538		 * In fact, let's schedule a special update for an hour from now. (It's possible
539		 * the issue could actually be on WordPress.org's side.) If that one fails, then email.
540		 */
541		$send = true;
542  		$transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro', 'locked' );
543  		if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
544  			wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
545  			$send = false;
546  		}
547
548  		$n = get_site_option( 'auto_core_update_notified' );
549		// Don't notify if we've already notified the same email address of the same version of the same notification type.
550		if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
551			$send = false;
552
553		update_site_option( 'auto_core_update_failed', array(
554			'attempted'  => $core_update->current,
555			'current'    => $wp_version,
556			'error_code' => $error_code,
557			'error_data' => $result->get_error_data(),
558			'timestamp'  => time(),
559			'retry'      => in_array( $error_code, $transient_failures ),
560		) );
561
562		if ( $send )
563			$this->send_email( 'fail', $core_update, $result );
564	}
565
566	/**
567	 * Sends an email upon the completion or failure of a background core update.
568	 *
569	 * @since 3.7.0
570	 *
571	 * @param string $type        The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
572	 * @param object $core_update The update offer that was attempted.
573	 * @param mixed  $result      Optional. The result for the core update. Can be WP_Error.
574	 */
575	protected function send_email( $type, $core_update, $result = null ) {
576		update_site_option( 'auto_core_update_notified', array(
577			'type'      => $type,
578			'email'     => get_site_option( 'admin_email' ),
579			'version'   => $core_update->current,
580			'timestamp' => time(),
581		) );
582
583		$next_user_core_update = get_preferred_from_update_core();
584		// If the update transient is empty, use the update we just performed
585		if ( ! $next_user_core_update )
586			$next_user_core_update = $core_update;
587		$newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
588
589		/**
590		 * Filters whether to send an email following an automatic background core update.
591		 *
592		 * @since 3.7.0
593		 *
594		 * @param bool   $send        Whether to send the email. Default true.
595		 * @param string $type        The type of email to send. Can be one of
596		 *                            'success', 'fail', 'critical'.
597		 * @param object $core_update The update offer that was attempted.
598		 * @param mixed  $result      The result for the core update. Can be WP_Error.
599		 */
600		if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
601			return;
602
603		switch ( $type ) {
604			case 'success' : // We updated.
605				/* translators: 1: Site name, 2: WordPress version number. */
606				$subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
607				break;
608
609			case 'fail' :   // We tried to update but couldn't.
610			case 'manual' : // We can't update (and made no attempt).
611				/* translators: 1: Site name, 2: WordPress version number. */
612				$subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
613				break;
614
615			case 'critical' : // We tried to update, started to copy files, then things went wrong.
616				/* translators: 1: Site name. */
617				$subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
618				break;
619
620			default :
621				return;
622		}
623
624		// If the auto update is not to the latest version, say that the current version of WP is available instead.
625		$version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
626		$subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );
627
628		$body = '';
629
630		switch ( $type ) {
631			case 'success' :
632				$body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
633				$body .= "\n\n";
634				if ( ! $newer_version_available )
635					$body .= __( 'No further action is needed on your part.' ) . ' ';
636
637				// Can only reference the About screen if their update was successful.
638				list( $about_version ) = explode( '-', $core_update->current, 2 );
639				$body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
640				$body .= "\n" . admin_url( 'about.php' );
641
642				if ( $newer_version_available ) {
643					$body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
644					$body .= __( 'Updating is easy and only takes a few moments:' );
645					$body .= "\n" . network_admin_url( 'update-core.php' );
646				}
647
648				break;
649
650			case 'fail' :
651			case 'manual' :
652				$body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );
653
654				$body .= "\n\n";
655
656				// Don't show this message if there is a newer version available.
657				// Potential for confusion, and also not useful for them to know at this point.
658				if ( 'fail' == $type && ! $newer_version_available )
659					$body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
660
661				$body .= __( 'Updating is easy and only takes a few moments:' );
662				$body .= "\n" . network_admin_url( 'update-core.php' );
663				break;
664
665			case 'critical' :
666				if ( $newer_version_available )
667					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
668				else
669					$body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );
670
671				$body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );
672
673				$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:" );
674				$body .= "\n" . network_admin_url( 'update-core.php' );
675				break;
676		}
677
678		$critical_support = 'critical' === $type && ! empty( $core_update->support_email );
679		if ( $critical_support ) {
680			// Support offer if available.
681			$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 );
682		} else {
683			// Add a note about the support forums.
684			$body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
685			$body .= "\n" . __( 'https://wordpress.org/support/' );
686		}
687
688		// Updates are important!
689		if ( $type != 'success' || $newer_version_available ) {
690			$body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
691		}
692
693		if ( $critical_support ) {
694			$body .= " " . __( "If you reach out to us, we'll also ensure you'll never have this problem again." );
695		}
696
697		// If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
698		if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
699			$body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
700			$body .= "\n" . network_admin_url();
701		}
702
703		$body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
704
705		if ( 'critical' == $type && is_wp_error( $result ) ) {
706			$body .= "\n***\n\n";
707			$body .= sprintf( __( 'Your site was running version %s.' ), get_bloginfo( 'version' ) );
708			$body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
709			$body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );
710
711			// If we had a rollback and we're still critical, then the rollback failed too.
712			// Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
713			if ( 'rollback_was_required' == $result->get_error_code() )
714				$errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
715			else
716				$errors = array( $result );
717
718			foreach ( $errors as $error ) {
719				if ( ! is_wp_error( $error ) )
720					continue;
721				$error_code = $error->get_error_code();
722				$body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
723				if ( 'rollback_was_required' == $error_code )
724					continue;
725				if ( $error->get_error_message() )
726					$body .= "\n" . $error->get_error_message();
727				$error_data = $error->get_error_data();
728				if ( $error_data )
729					$body .= "\n" . implode( ', ', (array) $error_data );
730			}
731			$body .= "\n";
732		}
733
734		$to  = get_site_option( 'admin_email' );
735		$headers = '';
736
737		$email = compact( 'to', 'subject', 'body', 'headers' );
738
739		/**
740		 * Filters the email sent following an automatic background core update.
741		 *
742		 * @since 3.7.0
743		 *
744		 * @param array $email {
745		 *     Array of email arguments that will be passed to wp_mail().
746		 *
747		 *     @type string $to      The email recipient. An array of emails
748		 *                            can be returned, as handled by wp_mail().
749		 *     @type string $subject The email's subject.
750		 *     @type string $body    The email message body.
751		 *     @type string $headers Any email headers, defaults to no headers.
752		 * }
753		 * @param string $type        The type of email being sent. Can be one of
754		 *                            'success', 'fail', 'manual', 'critical'.
755		 * @param object $core_update The update offer that was attempted.
756		 * @param mixed  $result      The result for the core update. Can be WP_Error.
757		 */
758		$email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
759
760		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
761	}
762
763	/**
764	 * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
765	 *
766	 * @since 3.7.0
767	 */
768	protected function send_debug_email() {
769		$update_count = 0;
770		foreach ( $this->update_results as $type => $updates )
771			$update_count += count( $updates );
772
773		$body = array();
774		$failures = 0;
775
776		$body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );
777
778		// Core
779		if ( isset( $this->update_results['core'] ) ) {
780			$result = $this->update_results['core'][0];
781			if ( $result->result && ! is_wp_error( $result->result ) ) {
782				$body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
783			} else {
784				$body[] = sprintf( __( 'FAILED: WordPress failed to update to %s' ), $result->name );
785				$failures++;
786			}
787			$body[] = '';
788		}
789
790		// Plugins, Themes, Translations
791		foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
792			if ( ! isset( $this->update_results[ $type ] ) )
793				continue;
794			$success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
795			if ( $success_items ) {
796				$messages = array(
797					'plugin'      => __( 'The following plugins were successfully updated:' ),
798					'theme'       => __( 'The following themes were successfully updated:' ),
799					'translation' => __( 'The following translations were successfully updated:' ),
800				);
801
802				$body[] = $messages[ $type ];
803				foreach ( wp_list_pluck( $success_items, 'name' ) as $name ) {
804					$body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
805				}
806			}
807			if ( $success_items != $this->update_results[ $type ] ) {
808				// Failed updates
809				$messages = array(
810					'plugin'      => __( 'The following plugins failed to update:' ),
811					'theme'       => __( 'The following themes failed to update:' ),
812					'translation' => __( 'The following translations failed to update:' ),
813				);
814
815				$body[] = $messages[ $type ];
816				foreach ( $this->update_results[ $type ] as $item ) {
817					if ( ! $item->result || is_wp_error( $item->result ) ) {
818						$body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
819						$failures++;
820					}
821				}
822			}
823			$body[] = '';
824		}
825
826		$site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
827		if ( $failures ) {
828			$body[] = trim( __(
829"BETA TESTING?
830=============
831
832This debugging email is sent when you are using a development version of WordPress.
833
834If you think these failures might be due to a bug in WordPress, could you report it?
835 * Open a thread in the support forums: https://wordpress.org/support/forum/alphabeta
836 * Or, if you're comfortable writing a bug report: https://core.trac.wordpress.org/
837
838Thanks! -- The WordPress Team" ) );
839			$body[] = '';
840
841			$subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
842		} else {
843			$subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
844		}
845
846		$body[] = trim( __(
847'UPDATE LOG
848==========' ) );
849		$body[] = '';
850
851		foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
852			if ( ! isset( $this->update_results[ $type ] ) )
853				continue;
854			foreach ( $this->update_results[ $type ] as $update ) {
855				$body[] = $update->name;
856				$body[] = str_repeat( '-', strlen( $update->name ) );
857				foreach ( $update->messages as $message )
858					$body[] = "  " . html_entity_decode( str_replace( '&#8230;', '...', $message ) );
859				if ( is_wp_error( $update->result ) ) {
860					$results = array( 'update' => $update->result );
861					// If we rolled back, we want to know an error that occurred then too.
862					if ( 'rollback_was_required' === $update->result->get_error_code() )
863						$results = (array) $update->result->get_error_data();
864					foreach ( $results as $result_type => $result ) {
865						if ( ! is_wp_error( $result ) )
866							continue;
867
868						if ( 'rollback' === $result_type ) {
869							/* translators: 1: Error code, 2: Error message. */
870							$body[] = '  ' . sprintf( __( 'Rollback Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
871						} else {
872							/* translators: 1: Error code, 2: Error message. */
873							$body[] = '  ' . sprintf( __( 'Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
874						}
875
876						if ( $result->get_error_data() )
877							$body[] = '         ' . implode( ', ', (array) $result->get_error_data() );
878					}
879				}
880				$body[] = '';
881			}
882		}
883
884		$email = array(
885			'to'      => get_site_option( 'admin_email' ),
886			'subject' => $subject,
887			'body'    => implode( "\n", $body ),
888			'headers' => ''
889		);
890
891		/**
892		 * Filters the debug email that can be sent following an automatic
893		 * background core update.
894		 *
895		 * @since 3.8.0
896		 *
897		 * @param array $email {
898		 *     Array of email arguments that will be passed to wp_mail().
899		 *
900		 *     @type string $to      The email recipient. An array of emails
901		 *                           can be returned, as handled by wp_mail().
902		 *     @type string $subject Email subject.
903		 *     @type string $body    Email message body.
904		 *     @type string $headers Any email headers. Default empty.
905		 * }
906		 * @param int   $failures The number of failures encountered while upgrading.
907		 * @param mixed $results  The results of all attempted updates.
908		 */
909		$email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );
910
911		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
912	}
913}