public function testGetUnusedEntities()
{
$q3 = new ItemId('Q3');
$q4 = new ItemId('Q4');
$q6 = new ItemId('Q6');
$u3i = new EntityUsage($q3, EntityUsage::SITELINK_USAGE);
$u3l = new EntityUsage($q3, EntityUsage::LABEL_USAGE, 'de');
$u4l = new EntityUsage($q4, EntityUsage::LABEL_USAGE, 'de');
$usages = array($u3i, $u3l, $u4l);
$this->putUsages(23, $usages, '20150102030405');
Assert::assertEmpty($this->lookup->getUnusedEntities(array($q4)), 'Q4 should not be unused');
$unused = $this->lookup->getUnusedEntities(array($q4, $q6));
Assert::assertCount(1, $unused);
Assert::assertEquals($q6, reset($unused), 'Q6 shouold be unused');
}
/**
* Removes stale usage information for the given page, and removes
* any subscriptions that have become unnecessary.
*
* @param int $pageId The ID of the page the entities are used on.
* @param string $lastUpdatedBefore timestamp. Entries older than this timestamp will be removed.
*
* @see UsageTracker::trackUsedEntities
*
* @throws InvalidArgumentException
*/
public function pruneUsagesForPage($pageId, $lastUpdatedBefore = '00000000000000')
{
if (!is_int($pageId)) {
throw new InvalidArgumentException('$pageId must be an int!');
}
if (!is_string($lastUpdatedBefore) || $lastUpdatedBefore === '') {
throw new InvalidArgumentException('$lastUpdatedBefore must be a timestamp string!');
}
$prunedUsages = $this->usageTracker->pruneStaleUsages($pageId, $lastUpdatedBefore);
$prunedEntityIds = $this->getEntityIds($prunedUsages);
$unusedIds = $this->usageLookup->getUnusedEntities($prunedEntityIds);
if (!empty($unusedIds)) {
// Unsubscribe from anything that was pruned and is otherwise unused.
$this->subscriptionManager->unsubscribe($this->clientId, $unusedIds);
}
}
/**
* Returns the page updates implied by the given the change.
*
* @param EntityChange $change
*
* @return Traversable of PageEntityUsages
*/
private function getAffectedPages(EntityChange $change)
{
$entityId = $change->getEntityId();
$changedAspects = $this->getChangedAspects($change);
$usages = $this->usageLookup->getPagesUsing(array($entityId), array_merge($changedAspects, array(EntityUsage::ALL_USAGE)));
// @todo: use iterators throughout!
$usages = iterator_to_array($usages, true);
$usages = $this->transformAllPageEntityUsages($usages, $entityId, $changedAspects);
if ($change instanceof ItemChange && in_array(EntityUsage::TITLE_USAGE, $changedAspects)) {
$siteLinkDiff = $change->getSiteLinkDiff();
$namesFromDiff = $this->getPagesReferencedInDiff($siteLinkDiff);
$titlesFromDiff = $this->getTitlesFromTexts($namesFromDiff);
$usagesFromDiff = $this->makeVirtualUsages($titlesFromDiff, $entityId, array(EntityUsage::SITELINK_USAGE));
//FIXME: we can't really merge if $usages is an iterator, not an array.
//TODO: Inject $usagesFromDiff "on the fly" while streaming other usages.
//NOTE: $usages must pass through mergeUsagesInto for re-indexing
$mergedUsages = array();
$this->mergeUsagesInto($usages, $mergedUsages);
$this->mergeUsagesInto($usagesFromDiff, $mergedUsages);
$usages = $mergedUsages;
}
return new ArrayIterator($usages);
}
