MediaWiki  master
ActivityUpdateJob.php
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1 <?php
24 
37 class ActivityUpdateJob extends Job {
42  public function __construct( $title, array $params ) {
43  // If we know its a PageReference, we could just pass that to the parent
44  // constructor, but its simpler to just extract namespace and dbkey, and
45  // that works for both LinkTarget and PageReference
46  $params['namespace'] = $title->getNamespace();
47  $params['title'] = $title->getDBkey();
48 
49  parent::__construct( 'activityUpdateJob', $params );
50 
51  static $required = [ 'type', 'userid', 'notifTime', 'curTime' ];
52  $missing = implode( ', ', array_diff( $required, array_keys( $this->params ) ) );
53  if ( $missing != '' ) {
54  throw new InvalidArgumentException( "Missing parameter(s) $missing" );
55  }
56 
57  $this->removeDuplicates = true;
58  }
59 
60  public function run() {
61  if ( $this->params['type'] === 'updateWatchlistNotification' ) {
63  } else {
64  throw new InvalidArgumentException( "Invalid 'type' '{$this->params['type']}'." );
65  }
66 
67  return true;
68  }
69 
70  protected function updateWatchlistNotification() {
71  $casTimestamp = $this->params['notifTime'] ?? $this->params['curTime'];
72 
73  $dbw = wfGetDB( DB_PRIMARY );
74  // Add a "check and set" style comparison to handle conflicts.
75  // The inequality always avoids updates when the current value
76  // is already NULL per ANSI SQL. This is desired since NULL means
77  // that the user is "caught up" on edits already. When the field
78  // is non-NULL, make sure not to set it back in time or set it to
79  // NULL when newer revisions were in fact added to the page.
80  $casTimeCond = 'wl_notificationtimestamp < ' . $dbw->addQuotes( $dbw->timestamp( $casTimestamp ) );
81 
82  // select primary key first instead of directly update to avoid deadlocks per T204561
83  $wlId = $dbw->selectField(
84  'watchlist',
85  'wl_id',
86  [
87  'wl_user' => $this->params['userid'],
88  'wl_namespace' => $this->title->getNamespace(),
89  'wl_title' => $this->title->getDBkey(),
90  $casTimeCond
91  ],
92  __METHOD__
93  );
94 
95  if ( !$wlId ) {
96  return;
97  }
98 
99  $dbw->update(
100  'watchlist',
101  [ 'wl_notificationtimestamp' => $dbw->timestampOrNull( $this->params['notifTime'] ) ],
102  [
103  'wl_id' => (int)$wlId,
104  // For paranoia, enforce the CAS time condition here too
105  $casTimeCond
106  ],
107  __METHOD__
108  );
109  }
110 }
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
Job for updating user activity like "last viewed" timestamps.
__construct( $title, array $params)
Class to both describe a background job and handle jobs.
Definition: Job.php:39
Title $title
Definition: Job.php:50
array $params
Array of job parameters.
Definition: Job.php:44
getNamespace()
Get the namespace index, i.e.
Definition: Title.php:1066
getDBkey()
Get the main part with underscores.
Definition: Title.php:1057
Interface for objects (potentially) representing a page that can be viewable and linked to on a wiki.
const DB_PRIMARY
Definition: defines.php:28