Exemple #1
0
 /**
  * Change an internal id to another value. If no target value is given, the
  * value is changed to become the last id entry (based on the automatic id
  * increment of the database). Whatever currently occupies this id will be
  * moved consistently in all relevant tables. Whatever currently occupies
  * the target id will be ignored (it should be ensured that nothing is
  * moved to an id that is still in use somewhere).
  *
  * @since 1.8
  * @param integer $curid
  * @param integer $targetid
  */
 public function moveSMWPageID($curid, $targetid = 0)
 {
     $db = wfGetDB(DB_MASTER, 'smw');
     $row = $db->selectRow(SMWSql3SmwIds::tableName, '*', array('smw_id' => $curid), __METHOD__);
     if ($row === false) {
         return;
     }
     // no id at current position, ignore
     if ($targetid == 0) {
         // append new id
         $db->insert(SMWSql3SmwIds::tableName, array('smw_id' => $db->nextSequenceValue('smw_ids_smw_id_seq'), 'smw_title' => $row->smw_title, 'smw_namespace' => $row->smw_namespace, 'smw_iw' => $row->smw_iw, 'smw_subobject' => $row->smw_subobject, 'smw_sortkey' => $row->smw_sortkey), __METHOD__);
         $targetid = $db->insertId();
     } else {
         // change to given id
         $db->insert(SMWSql3SmwIds::tableName, array('smw_id' => $targetid, 'smw_title' => $row->smw_title, 'smw_namespace' => $row->smw_namespace, 'smw_iw' => $row->smw_iw, 'smw_subobject' => $row->smw_subobject, 'smw_sortkey' => $row->smw_sortkey), __METHOD__);
     }
     $db->delete(SMWSql3SmwIds::tableName, array('smw_id' => $curid), 'SMWSQLStore3::moveSMWPageID');
     $this->setCache($row->smw_title, $row->smw_namespace, $row->smw_iw, $row->smw_subobject, $targetid, $row->smw_sortkey);
     $this->store->changeSMWPageID($curid, $targetid, $row->smw_namespace, $row->smw_namespace);
 }
 /**
  * Helper method to write information about some redirect. Various updates
  * can be necessary if redirects are resolved as identities in SMW. The
  * title and namespace of the affected page and of its updated redirect
  * target are given. The target can be empty ('') to delete any redirect.
  * Returns the canonical ID that is now to be used for the subject.
  *
  * This method does not change the ids of the affected pages, and thus it
  * is not concerned with updates of the data that is currently stored for
  * the subject. Normally, a subject that is a redirect will not have other
  * data, but this method does not depend on this.
  *
  * @note Please make sure you fully understand this code before making any
  * changes here. Keeping the redirect structure consistent is important,
  * and errors in this code can go unnoticed for quite some time.
  *
  * @note This method merely handles the addition or deletion of a redirect
  * statement in the wiki. It does not assume that any page contents has
  * been changed (e.g. moved). See changeTitle() for additional handling in
  * this case.
  *
  * @todo Clean up this code.
  *
  * @since 1.8
  * @param string $subject_t
  * @param integer $subject_ns
  * @param string $curtarget_t
  * @param integer $curtarget_ns
  * @return integer the new canonical ID of the subject
  */
 protected function updateRedirects($subject_t, $subject_ns, $curtarget_t = '', $curtarget_ns = -1)
 {
     global $smwgQEqualitySupport, $smwgEnableUpdateJobs;
     $count = 0;
     //track count changes for redi property
     // *** First get id of subject, old redirect target, and current (new) redirect target ***//
     $sid_sort = '';
     $sid = $this->store->smwIds->getSMWPageIDandSort($subject_t, $subject_ns, '', '', $sid_sort, false);
     // find real id of subject, if any
     /// NOTE: $sid can be 0 here; this is useful to know since it means that fewer table updates are needed
     $new_tid = $curtarget_t ? $this->store->smwIds->makeSMWPageID($curtarget_t, $curtarget_ns, '', '', false) : 0;
     // real id of new target, if given
     $db = wfGetDB(DB_SLAVE);
     $row = $db->selectRow(array('smw_fpt_redi'), 'o_id', array('s_title' => $subject_t, 's_namespace' => $subject_ns), __METHOD__);
     $old_tid = $row !== false ? $row->o_id : 0;
     // real id of old target, if any
     /// NOTE: $old_tid and $new_tid both (intentionally) ignore further redirects: no redirect chains
     if ($old_tid == $new_tid) {
         // no change, all happy
         return $new_tid == 0 ? $sid : $new_tid;
     }
     // note that this means $old_tid != $new_tid in all cases below
     // *** Make relevant changes in property tables (don't write the new redirect yet) ***//
     $db = wfGetDB(DB_MASTER);
     // now we need to write something
     if ($old_tid == 0 && $sid != 0 && $smwgQEqualitySupport != SMW_EQ_NONE) {
         // new redirect
         // $smwgQEqualitySupport requires us to change all tables' page references from $sid to $new_tid.
         // Since references must not be 0, we don't have to do this is $sid == 0.
         $this->store->changeSMWPageID($sid, $new_tid, $subject_ns, $curtarget_ns, false, true);
     } elseif ($old_tid != 0) {
         // existing redirect is changed or deleted
         $db->delete('smw_fpt_redi', array('s_title' => $subject_t, 's_namespace' => $subject_ns), __METHOD__);
         $count--;
         if ($smwgEnableUpdateJobs && $smwgQEqualitySupport != SMW_EQ_NONE) {
             // entries that refer to old target may in fact refer to subject,
             // but we don't know which: schedule affected pages for update
             $jobs = array();
             foreach (SMWSQLStore3::getPropertyTables() as $proptable) {
                 if ($proptable->getName() == 'smw_fpt_redi') {
                     continue;
                     // can safely be skipped
                 }
                 if ($proptable->usesIdSubject()) {
                     $from = $db->tableName($proptable->getName()) . ' INNER JOIN ' . $db->tableName(SMWSql3SmwIds::tableName) . ' ON s_id=smw_id';
                     $select = 'DISTINCT smw_title AS t,smw_namespace AS ns';
                 } else {
                     $from = $db->tableName($proptable->getName());
                     $select = 'DISTINCT s_title AS t,s_namespace AS ns';
                 }
                 if ($subject_ns == SMW_NS_PROPERTY && !$proptable->isFixedPropertyTable()) {
                     $res = $db->select($from, $select, array('p_id' => $old_tid), __METHOD__);
                     foreach ($res as $row) {
                         $title = Title::makeTitleSafe($row->ns, $row->t);
                         if (!is_null($title)) {
                             $jobs[] = new SMWUpdateJob($title);
                         }
                     }
                     $db->freeResult($res);
                 }
                 foreach ($proptable->getFields($this->store) as $fieldname => $type) {
                     if ($type == 'p') {
                         $res = $db->select($from, $select, array($fieldname => $old_tid), __METHOD__);
                         foreach ($res as $row) {
                             $title = Title::makeTitleSafe($row->ns, $row->t);
                             if (!is_null($title)) {
                                 $jobs[] = new SMWUpdateJob($title);
                             }
                         }
                         $db->freeResult($res);
                     }
                 }
             }
             /// NOTE: we do not update the concept cache here; this remains an offline task
             /// NOTE: this only happens if $smwgEnableUpdateJobs was true above:
             Job::batchInsert($jobs);
         }
     }
     // *** Finally, write the new redirect data ***//
     if ($new_tid != 0) {
         // record a new redirect
         // Redirecting done right:
         // (1) make a new ID with iw SMW_SQL3_SMWREDIIW or
         //     change iw field of current ID in this way,
         // (2) write smw_fpt_redi table,
         // (3) update canonical cache.
         // This order must be obeyed unless you really understand what you are doing!
         if ($old_tid == 0 && $smwgQEqualitySupport != SMW_EQ_NONE) {
             // mark subject as redirect (if it was no redirect before)
             if ($sid == 0) {
                 // every redirect page must have an ID
                 $sid = $this->store->smwIds->makeSMWPageID($subject_t, $subject_ns, SMW_SQL3_SMWREDIIW, '', false);
             } else {
                 $db->update(SMWSql3SmwIds::tableName, array('smw_iw' => SMW_SQL3_SMWREDIIW), array('smw_id' => $sid), __METHOD__);
                 $this->store->smwIds->setCache($subject_t, $subject_ns, '', '', 0, '');
                 $this->store->smwIds->setCache($subject_t, $subject_ns, SMW_SQL3_SMWREDIIW, '', $sid, $sid_sort);
             }
         }
         $db->insert('smw_fpt_redi', array('s_title' => $subject_t, 's_namespace' => $subject_ns, 'o_id' => $new_tid), __METHOD__);
         $count++;
     } else {
         // delete old redirect
         // This case implies $old_tid != 0 (or we would have new_tid == old_tid above).
         // Therefore $subject had a redirect, and it must also have an ID.
         // This shows that $sid != 0 here.
         if ($smwgQEqualitySupport != SMW_EQ_NONE) {
             // mark subject as non-redirect
             $db->update(SMWSql3SmwIds::tableName, array('smw_iw' => ''), array('smw_id' => $sid), __METHOD__);
             $this->store->smwIds->setCache($subject_t, $subject_ns, SMW_SQL3_SMWREDIIW, '', 0, '');
             $this->store->smwIds->setCache($subject_t, $subject_ns, '', '', $sid, $sid_sort);
         }
     }
     // *** Flush some caches to be safe, though they are not essential in runs with redirect updates ***//
     unset($this->store->m_semdata[$sid]);
     unset($this->store->m_semdata[$new_tid]);
     unset($this->store->m_semdata[$old_tid]);
     unset($this->store->m_sdstate[$sid]);
     unset($this->store->m_sdstate[$new_tid]);
     unset($this->store->m_sdstate[$old_tid]);
     // *** Update reference count for _REDI property ***//
     $this->addToPropertyUsageCount($this->store->smwIds->getSMWPropertyID(new SMWDIProperty('_REDI')), $count, $db);
     return $new_tid == 0 ? $sid : $new_tid;
 }
 /**
  * Change an internal id to another value. If no target value is given, the
  * value is changed to become the last id entry (based on the automatic id
  * increment of the database). Whatever currently occupies this id will be
  * moved consistently in all relevant tables. Whatever currently occupies
  * the target id will be ignored (it should be ensured that nothing is
  * moved to an id that is still in use somewhere).
  *
  * @since 1.8
  * @param integer $curid
  * @param integer $targetid
  */
 public function moveSMWPageID($curid, $targetid = 0)
 {
     $db = $this->store->getConnection();
     $row = $db->selectRow(self::tableName, '*', array('smw_id' => $curid), __METHOD__);
     if ($row === false) {
         return;
         // no id at current position, ignore
     }
     $db->beginAtomicTransaction(__METHOD__);
     if ($targetid == 0) {
         // append new id
         $sequenceValue = $db->nextSequenceValue($this->getIdTable() . '_smw_id_seq');
         // Bug 42659
         $db->insert(self::tableName, array('smw_id' => $sequenceValue, 'smw_title' => $row->smw_title, 'smw_namespace' => $row->smw_namespace, 'smw_iw' => $row->smw_iw, 'smw_subobject' => $row->smw_subobject, 'smw_sortkey' => $row->smw_sortkey), __METHOD__);
         $targetid = $db->insertId();
     } else {
         // change to given id
         $db->insert(self::tableName, array('smw_id' => $targetid, 'smw_title' => $row->smw_title, 'smw_namespace' => $row->smw_namespace, 'smw_iw' => $row->smw_iw, 'smw_subobject' => $row->smw_subobject, 'smw_sortkey' => $row->smw_sortkey), __METHOD__);
     }
     $db->delete(self::tableName, array('smw_id' => $curid), __METHOD__);
     $this->setCache($row->smw_title, $row->smw_namespace, $row->smw_iw, $row->smw_subobject, $targetid, $row->smw_sortkey);
     $this->store->changeSMWPageID($curid, $targetid, $row->smw_namespace, $row->smw_namespace);
     $db->commitAtomicTransaction(__METHOD__);
 }