Add flag to HTMLTextField to not persist submitted data
[lhc/web/wiklou.git] / includes / WatchedItem.php
index 49aca0c..5b4a4fc 100644 (file)
@@ -1,7 +1,5 @@
 <?php
 /**
- * Accessor and mutator for watchlist entries.
- *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
 /**
  * Representation of a pair of user and title for watchlist entries.
  *
+ * @author Tim Starling
+ * @author Addshore
+ *
  * @ingroup Watchlist
  */
 class WatchedItem {
-       /** @var Title */
-       private $mTitle;
-
-       /** @var User */
-       private $mUser;
-
-       /** @var int */
-       private $mCheckRights;
-
-       /** @var bool */
-       private $loaded = false;
-
-       /** @var bool */
-       private $watched;
-
-       /** @var string */
-       private $timestamp;
 
        /**
-        * Constant to specify that user rights 'editmywatchlist' and
-        * 'viewmywatchlist' should not be checked.
-        * @since 1.22
+        * @deprecated since 1.27, see User::IGNORE_USER_RIGHTS
         */
-       const IGNORE_USER_RIGHTS = 0;
+       const IGNORE_USER_RIGHTS = User::IGNORE_USER_RIGHTS;
 
        /**
-        * Constant to specify that user rights 'editmywatchlist' and
-        * 'viewmywatchlist' should be checked.
-        * @since 1.22
+        * @deprecated since 1.27, see User::CHECK_USER_RIGHTS
         */
-       const CHECK_USER_RIGHTS = 1;
+       const CHECK_USER_RIGHTS = User::CHECK_USER_RIGHTS;
 
        /**
-        * Create a WatchedItem object with the given user and title
-        * @since 1.22 $checkRights parameter added
-        * @param User $user The user to use for (un)watching
-        * @param Title $title The title we're going to (un)watch
-        * @param int $checkRights Whether to check the 'viewmywatchlist' and 'editmywatchlist' rights.
-        *     Pass either WatchedItem::IGNORE_USER_RIGHTS or WatchedItem::CHECK_USER_RIGHTS.
-        * @return WatchedItem
+        * @deprecated Internal class use only
         */
-       public static function fromUserTitle( $user, $title,
-               $checkRights = WatchedItem::CHECK_USER_RIGHTS
-       ) {
-               $wl = new WatchedItem;
-               $wl->mUser = $user;
-               $wl->mTitle = $title;
-               $wl->mCheckRights = $checkRights;
-
-               return $wl;
-       }
+       const DEPRECATED_USAGE_TIMESTAMP = -100;
 
        /**
-        * Title being watched
-        * @return Title
+        * @var bool
+        * @deprecated Internal class use only
         */
-       protected function getTitle() {
-               return $this->mTitle;
-       }
+       public $checkRights = User::CHECK_USER_RIGHTS;
 
        /**
-        * Helper to retrieve the title namespace
-        * @return int
+        * @var Title
+        * @deprecated Internal class use only
         */
-       protected function getTitleNs() {
-               return $this->getTitle()->getNamespace();
-       }
+       private $title;
 
        /**
-        * Helper to retrieve the title DBkey
-        * @return string
+        * @var LinkTarget
         */
-       protected function getTitleDBkey() {
-               return $this->getTitle()->getDBkey();
-       }
+       private $linkTarget;
 
        /**
-        * Helper to retrieve the user id
-        * @return int
+        * @var User
         */
-       protected function getUserId() {
-               return $this->mUser->getId();
-       }
+       private $user;
 
        /**
-        * Return an array of conditions to select or update the appropriate database
-        * row.
-        *
-        * @return array
+        * @var null|string the value of the wl_notificationtimestamp field
         */
-       private function dbCond() {
-               return array(
-                       'wl_user' => $this->getUserId(),
-                       'wl_namespace' => $this->getTitleNs(),
-                       'wl_title' => $this->getTitleDBkey(),
-               );
-       }
+       private $notificationTimestamp;
 
        /**
-        * Load the object from the database
+        * @param User $user
+        * @param LinkTarget $linkTarget
+        * @param null|string $notificationTimestamp the value of the wl_notificationtimestamp field
+        * @param bool|null $checkRights DO NOT USE - used internally for backward compatibility
         */
-       private function load() {
-               if ( $this->loaded ) {
-                       return;
-               }
-               $this->loaded = true;
-
-               // Only loggedin user can have a watchlist
-               if ( $this->mUser->isAnon() ) {
-                       $this->watched = false;
-                       return;
-               }
-
-               // some pages cannot be watched
-               if ( !$this->getTitle()->isWatchable() ) {
-                       $this->watched = false;
-                       return;
-               }
-
-               # Pages and their talk pages are considered equivalent for watching;
-               # remember that talk namespaces are numbered as page namespace+1.
-
-               $dbr = wfGetDB( DB_SLAVE );
-               $row = $dbr->selectRow( 'watchlist', 'wl_notificationtimestamp',
-                       $this->dbCond(), __METHOD__ );
-
-               if ( $row === false ) {
-                       $this->watched = false;
-               } else {
-                       $this->watched = true;
-                       $this->timestamp = $row->wl_notificationtimestamp;
+       public function __construct(
+               User $user,
+               LinkTarget $linkTarget,
+               $notificationTimestamp,
+               $checkRights = null
+       ) {
+               $this->user = $user;
+               $this->linkTarget = $linkTarget;
+               $this->notificationTimestamp = $notificationTimestamp;
+               if ( $checkRights !== null ) {
+                       $this->checkRights = $checkRights;
                }
        }
 
        /**
-        * Check permissions
-        * @param string $what 'viewmywatchlist' or 'editmywatchlist'
-        * @return bool
+        * @return User
         */
-       private function isAllowed( $what ) {
-               return !$this->mCheckRights || $this->mUser->isAllowed( $what );
+       public function getUser() {
+               return $this->user;
        }
 
        /**
-        * Is mTitle being watched by mUser?
-        * @return bool
+        * @return LinkTarget
         */
-       public function isWatched() {
-               if ( !$this->isAllowed( 'viewmywatchlist' ) ) {
-                       return false;
-               }
-
-               $this->load();
-               return $this->watched;
+       public function getLinkTarget() {
+               return $this->linkTarget;
        }
 
        /**
         * Get the notification timestamp of this entry.
         *
-        * @return bool|null|string False if the page is not watched, the value of
-        *   the wl_notificationtimestamp field otherwise
+        * @return bool|null|string
         */
        public function getNotificationTimestamp() {
-               if ( !$this->isAllowed( 'viewmywatchlist' ) ) {
-                       return false;
-               }
-
-               $this->load();
-               if ( $this->watched ) {
-                       return $this->timestamp;
-               } else {
-                       return false;
+               // Back compat for objects constructed using self::fromUserTitle
+               if ( $this->notificationTimestamp === self::DEPRECATED_USAGE_TIMESTAMP ) {
+                       // wfDeprecated( __METHOD__, '1.27' );
+                       if ( $this->checkRights && !$this->user->isAllowed( 'viewmywatchlist' ) ) {
+                               return false;
+                       }
+                       $item = WatchedItemStore::getDefaultInstance()
+                               ->loadWatchedItem( $this->user, $this->linkTarget );
+                       if ( $item ) {
+                               $this->notificationTimestamp = $item->getNotificationTimestamp();
+                       } else {
+                               $this->notificationTimestamp = false;
+                       }
                }
+               return $this->notificationTimestamp;
        }
 
        /**
-        * Reset the notification timestamp of this entry
-        *
-        * @param bool $force Whether to force the write query to be executed even if the
-        *    page is not watched or the notification timestamp is already NULL.
-        * @param int $oldid The revision id being viewed. If not given or 0, latest revision is assumed.
+        * Back compat pre 1.27 with the WatchedItemStore introduction
+        * @todo remove in 1.28/9
+        * -------------------------------------------------
         */
-       public function resetNotificationTimestamp(
-               $force = '', $oldid = 0
-       ) {
-               // Only loggedin user can have a watchlist
-               if ( wfReadOnly() || $this->mUser->isAnon() || !$this->isAllowed( 'editmywatchlist' ) ) {
-                       return;
-               }
 
-               if ( $force != 'force' ) {
-                       $this->load();
-                       if ( !$this->watched || $this->timestamp === null ) {
-                               return;
+       /**
+        * @return Title
+        * @deprecated Internal class use only
+        */
+       public function getTitle() {
+               if ( !$this->title ) {
+                       if ( $this->linkTarget instanceof Title ) {
+                               $this->title = $this->linkTarget;
+                       } else {
+                               $this->title = Title::newFromLinkTarget( $this->linkTarget );
                        }
                }
+               return $this->title;
+       }
 
-               $title = $this->getTitle();
-               if ( !$oldid ) {
-                       // No oldid given, assuming latest revision; clear the timestamp.
-                       $notificationTimestamp = null;
-               } elseif ( !$title->getNextRevisionID( $oldid ) ) {
-                       // Oldid given and is the latest revision for this title; clear the timestamp.
-                       $notificationTimestamp = null;
-               } else {
-                       // See if the version marked as read is more recent than the one we're viewing.
-                       // Call load() if it wasn't called before due to $force.
-                       $this->load();
-
-                       if ( $this->timestamp === null ) {
-                               // This can only happen if $force is enabled.
-                               $notificationTimestamp = null;
-                       } else {
-                               // Oldid given and isn't the latest; update the timestamp.
-                               // This will result in no further notification emails being sent!
-                               $notificationTimestamp = Revision::getTimestampFromId( $title, $oldid );
-                               // We need to go one second to the future because of various strict comparisons
-                               // throughout the codebase
-                               $ts = new MWTimestamp( $notificationTimestamp );
-                               $ts->timestamp->add( new DateInterval( 'PT1S' ) );
-                               $notificationTimestamp = $ts->getTimestamp( TS_MW );
+       /**
+        * @deprecated since 1.27 Use the constructor, WatchedItemStore::getWatchedItem()
+        *             or WatchedItemStore::loadWatchedItem()
+        */
+       public static function fromUserTitle( $user, $title, $checkRights = User::CHECK_USER_RIGHTS ) {
+               // wfDeprecated( __METHOD__, '1.27' );
+               return new self( $user, $title, self::DEPRECATED_USAGE_TIMESTAMP, (bool)$checkRights );
+       }
 
-                               if ( $notificationTimestamp < $this->timestamp ) {
-                                       if ( $force != 'force' ) {
-                                               return;
-                                       } else {
-                                               // This is a little silly…
-                                               $notificationTimestamp = $this->timestamp;
-                                       }
-                               }
-                       }
+       /**
+        * @deprecated since 1.27 Use WatchedItemStore::resetNotificationTimestamp()
+        */
+       public function resetNotificationTimestamp( $force = '', $oldid = 0 ) {
+               // wfDeprecated( __METHOD__, '1.27' );
+               if ( $this->checkRights && !$this->user->isAllowed( 'editmywatchlist' ) ) {
+                       return;
                }
-
-               // If the page is watched by the user (or may be watched), update the timestamp
-               $job = new ActivityUpdateJob(
-                       $title,
-                       array(
-                               'type'      => 'updateWatchlistNotification',
-                               'userid'    => $this->getUserId(),
-                               'notifTime' => $notificationTimestamp,
-                               'curTime'   => time()
-                       )
+               WatchedItemStore::getDefaultInstance()->resetNotificationTimestamp(
+                       $this->user,
+                       $this->getTitle(),
+                       $force,
+                       $oldid
                );
-               // Try to run this post-send
-               DeferredUpdates::addCallableUpdate( function() use ( $job ) {
-                       $job->run();
-               } );
-
-               $this->timestamp = null;
        }
 
        /**
-        * @param WatchedItem[] $items
-        * @return bool
+        * @deprecated since 1.27 Use WatchedItemStore::addWatchBatch()
         */
        public static function batchAddWatch( array $items ) {
-
-               if ( wfReadOnly() ) {
-                       return false;
-               }
-
-               $rows = array();
-               foreach ( $items as $item ) {
-                       // Only loggedin user can have a watchlist
-                       if ( $item->mUser->isAnon() || !$item->isAllowed( 'editmywatchlist' ) ) {
+               // wfDeprecated( __METHOD__, '1.27' );
+               $userTargetCombinations = [];
+               /** @var WatchedItem $watchedItem */
+               foreach ( $items as $watchedItem ) {
+                       if ( $watchedItem->checkRights && !$watchedItem->getUser()->isAllowed( 'editmywatchlist' ) ) {
                                continue;
                        }
-                       $rows[] = array(
-                               'wl_user' => $item->getUserId(),
-                               'wl_namespace' => MWNamespace::getSubject( $item->getTitleNs() ),
-                               'wl_title' => $item->getTitleDBkey(),
-                               'wl_notificationtimestamp' => null,
-                       );
-                       // Every single watched page needs now to be listed in watchlist;
-                       // namespace:page and namespace_talk:page need separate entries:
-                       $rows[] = array(
-                               'wl_user' => $item->getUserId(),
-                               'wl_namespace' => MWNamespace::getTalk( $item->getTitleNs() ),
-                               'wl_title' => $item->getTitleDBkey(),
-                               'wl_notificationtimestamp' => null
-                       );
-                       $item->watched = true;
+                       $userTargetCombinations[] = [
+                               $watchedItem->getUser(),
+                               $watchedItem->getTitle()->getSubjectPage()
+                       ];
+                       $userTargetCombinations[] = [
+                               $watchedItem->getUser(),
+                               $watchedItem->getTitle()->getTalkPage()
+                       ];
                }
-
-               if ( !$rows ) {
-                       return false;
-               }
-
-               $dbw = wfGetDB( DB_MASTER );
-               foreach ( array_chunk( $rows, 100 ) as $toInsert ) {
-                       // Use INSERT IGNORE to avoid overwriting the notification timestamp
-                       // if there's already an entry for this page
-                       $dbw->insert( 'watchlist', $toInsert, __METHOD__, 'IGNORE' );
-               }
-
-               return true;
+               $store = WatchedItemStore::getDefaultInstance();
+               return $store->addWatchBatch( $userTargetCombinations );
        }
 
        /**
-        * Given a title and user (assumes the object is setup), add the watch to the database.
+        * @deprecated since 1.27 Use User::addWatch()
         * @return bool
         */
        public function addWatch() {
-               return self::batchAddWatch( array( $this ) );
+               // wfDeprecated( __METHOD__, '1.27' );
+               $this->user->addWatch( $this->getTitle(), $this->checkRights );
+               return true;
        }
 
        /**
-        * Same as addWatch, only the opposite.
+        * @deprecated since 1.27 Use User::removeWatch()
         * @return bool
         */
        public function removeWatch() {
-
-               // Only loggedin user can have a watchlist
-               if ( wfReadOnly() || $this->mUser->isAnon() || !$this->isAllowed( 'editmywatchlist' ) ) {
+               // wfDeprecated( __METHOD__, '1.27' );
+               if ( $this->checkRights && !$this->user->isAllowed( 'editmywatchlist' ) ) {
                        return false;
                }
-
-               $success = false;
-               $dbw = wfGetDB( DB_MASTER );
-               $dbw->delete( 'watchlist',
-                       array(
-                               'wl_user' => $this->getUserId(),
-                               'wl_namespace' => MWNamespace::getSubject( $this->getTitleNs() ),
-                               'wl_title' => $this->getTitleDBkey(),
-                       ), __METHOD__
-               );
-               if ( $dbw->affectedRows() ) {
-                       $success = true;
-               }
-
-               # the following code compensates the new behavior, introduced by the
-               # enotif patch, that every single watched page needs now to be listed
-               # in watchlist namespace:page and namespace_talk:page had separate
-               # entries: clear them
-               $dbw->delete( 'watchlist',
-                       array(
-                               'wl_user' => $this->getUserId(),
-                               'wl_namespace' => MWNamespace::getTalk( $this->getTitleNs() ),
-                               'wl_title' => $this->getTitleDBkey(),
-                       ), __METHOD__
-               );
-
-               if ( $dbw->affectedRows() ) {
-                       $success = true;
-               }
-
-               $this->watched = false;
-
-               return $success;
+               $this->user->removeWatch( $this->getTitle(), $this->checkRights );
+               return true;
        }
 
        /**
-        * Check if the given title already is watched by the user, and if so
-        * add watches on a new title. To be used for page renames and such.
-        *
-        * @param Title $ot Page title to duplicate entries from, if present
-        * @param Title $nt Page title to add watches on
+        * @deprecated since 1.27 Use User::isWatched()
+        * @return bool
         */
-       public static function duplicateEntries( $ot, $nt ) {
-               WatchedItem::doDuplicateEntries( $ot->getSubjectPage(), $nt->getSubjectPage() );
-               WatchedItem::doDuplicateEntries( $ot->getTalkPage(), $nt->getTalkPage() );
+       public function isWatched() {
+               // wfDeprecated( __METHOD__, '1.27' );
+               return $this->user->isWatched( $this->getTitle(), $this->checkRights );
        }
 
        /**
-        * Handle duplicate entries. Backend for duplicateEntries().
-        *
-        * @param Title $ot
-        * @param Title $nt
-        *
-        * @return bool
+        * @deprecated since 1.27 Use WatchedItemStore::duplicateAllAssociatedEntries()
         */
-       private static function doDuplicateEntries( $ot, $nt ) {
-               $oldnamespace = $ot->getNamespace();
-               $newnamespace = $nt->getNamespace();
-               $oldtitle = $ot->getDBkey();
-               $newtitle = $nt->getDBkey();
-
-               $dbw = wfGetDB( DB_MASTER );
-               $res = $dbw->select( 'watchlist',
-                       array( 'wl_user', 'wl_notificationtimestamp' ),
-                       array( 'wl_namespace' => $oldnamespace, 'wl_title' => $oldtitle ),
-                       __METHOD__, 'FOR UPDATE'
-               );
-               # Construct array to replace into the watchlist
-               $values = array();
-               foreach ( $res as $s ) {
-                       $values[] = array(
-                               'wl_user' => $s->wl_user,
-                               'wl_namespace' => $newnamespace,
-                               'wl_title' => $newtitle,
-                               'wl_notificationtimestamp' => $s->wl_notificationtimestamp,
-                       );
-               }
-
-               if ( empty( $values ) ) {
-                       // Nothing to do
-                       return true;
-               }
-
-               # Perform replace
-               # Note that multi-row replace is very efficient for MySQL but may be inefficient for
-               # some other DBMSes, mostly due to poor simulation by us
-               $dbw->replace(
-                       'watchlist',
-                       array( array( 'wl_user', 'wl_namespace', 'wl_title' ) ),
-                       $values,
-                       __METHOD__
-               );
-
-               return true;
+       public static function duplicateEntries( Title $oldTitle, Title $newTitle ) {
+               // wfDeprecated( __METHOD__, '1.27' );
+               $store = WatchedItemStore::getDefaultInstance();
+               $store->duplicateAllAssociatedEntries( $oldTitle, $newTitle );
        }
+
 }