/**
* Returns a human readable change ID, containing multiple IDs in case of a
* coalesced change.
*
* @param Change $change
*
* @return string
*/
private function getChangeIdForLog(Change $change)
{
if ($change instanceof EntityChange) {
//@todo: add getFields() to the Change interface, or provide getters!
$fields = $change->getFields();
if (isset($fields['info']['change-ids'])) {
return implode('|', $fields['info']['change-ids']);
}
}
return $change->getId();
}
/**
* Compares two changes based on their timestamp.
*
* @param Change $a
* @param Change $b
*
* @return int
*/
public function compareChangesByTimestamp(Change $a, Change $b)
{
//NOTE: beware https://bugs.php.net/bug.php?id=50688 !
if ($a->getTime() > $b->getTime()) {
return 1;
} elseif ($a->getTime() < $b->getTime()) {
return -1;
}
if ($a->getId() > $b->getId()) {
return 1;
} elseif ($a->getId() < $b->getId()) {
return -1;
}
return 0;
}
/**
* Checks whether the given Change is somehow relevant to the given wiki site.
*
* In particular this check whether the Change modifies any sitelink that refers to the
* given wiki site.
*
* @note: this does not check whether the entity that was changes is or is not at all
* connected with (resp. used on) the target wiki.
*
* @param Change $change the change to examine.
* @param string $siteID the site to consider.
*
* @return bool
*/
private function isRelevantChange(Change $change, $siteID)
{
if ($change instanceof ItemChange && !$change->isEmpty()) {
$siteLinkDiff = $change->getSiteLinkDiff();
if (isset($siteLinkDiff[$siteID])) {
return true;
}
}
return false;
}