public function testGetPagesUsing()
{
$q3 = new ItemId('Q3');
$q4 = new ItemId('Q4');
$q6 = new ItemId('Q6');
$u3s = new EntityUsage($q3, EntityUsage::SITELINK_USAGE);
$u3l = new EntityUsage($q3, EntityUsage::LABEL_USAGE, 'de');
$u4l = new EntityUsage($q4, EntityUsage::LABEL_USAGE, 'de');
$u4t = new EntityUsage($q4, EntityUsage::TITLE_USAGE);
$this->putUsages(23, array($u3s, $u3l, $u4l), '20150102030405');
$this->putUsages(42, array($u4l, $u4t), '20150102030405');
$pages = $this->lookup->getPagesUsing(array($q6));
Assert::assertEmpty(iterator_to_array($pages));
$pages = $this->lookup->getPagesUsing(array($q3));
$this->assertSamePageEntityUsages(array(23 => new PageEntityUsages(23, array($u3s, $u3l))), iterator_to_array($pages), 'Pages using Q3');
$pages = $this->lookup->getPagesUsing(array($q4, $q3), array(EntityUsage::makeAspectKey(EntityUsage::LABEL_USAGE, 'de')));
$this->assertSamePageEntityUsages(array(23 => new PageEntityUsages(23, array($u3l, $u4l)), 42 => new PageEntityUsages(42, array($u4l))), iterator_to_array($pages), 'Pages using "label" on Q4 or Q3');
$pages = $this->lookup->getPagesUsing(array($q3), array(EntityUsage::ALL_USAGE));
Assert::assertEmpty(iterator_to_array($pages), 'Pages using "all" on Q3');
$pages = $this->lookup->getPagesUsing(array($q4), array(EntityUsage::SITELINK_USAGE));
Assert::assertEmpty(iterator_to_array($pages), 'Pages using "sitelinks" on Q4');
$pages = $this->lookup->getPagesUsing(array($q3, $q4), array(EntityUsage::TITLE_USAGE, EntityUsage::SITELINK_USAGE));
Assert::assertCount(2, iterator_to_array($pages), 'Pages using "title" or "sitelinks" on Q3 or Q4');
$this->putUsages(23, array(), '20150102030405');
}
/**
* 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);
}
