/**
* Listen to entity ownership changes and update icon ownership by moving
* icons to their new owner's directory on filestore.
*
* This will only transfer icons that have a custom location on filestore
* and are owned by the entity's owner (instead of the entity itself).
* Even though core icon service does not store icons in the entity's owner
* directory, there are plugins that do (e.g. file plugin) - this handler
* helps such plugins avoid ownership mismatch.
*
* @param string $event "update:after"
* @param string $type "object"|"group"
* @param ElggObject $entity Entity
* @return void
* @access private
*/
function _elgg_filestore_move_icons($event, $type, $entity)
{
$original_attributes = $entity->getOriginalAttributes();
if (empty($original_attributes['owner_guid'])) {
return;
}
$previous_owner_guid = $original_attributes['owner_guid'];
$new_owner_guid = $entity->owner_guid;
$sizes = elgg_get_icon_sizes($entity->getType(), $entity->getSubtype());
foreach ($sizes as $size => $opts) {
$new_icon = $entity->getIcon($size);
if ($new_icon->owner_guid == $entity->guid) {
// we do not need to update icons that are owned by the entity itself
continue;
}
if ($new_icon->owner_guid != $new_owner_guid) {
// a plugin implements some custom logic
continue;
}
$old_icon = new \ElggIcon();
$old_icon->owner_guid = $previous_owner_guid;
$old_icon->setFilename($new_icon->getFilename());
if (!$old_icon->exists()) {
// there is no icon to move
continue;
}
if ($new_icon->exists()) {
// there is already a new icon
// just removing the old one
$old_icon->delete();
elgg_log("Entity {$entity->guid} has been transferred to a new owner but an icon was left behind under {$old_icon->getFilenameOnFilestore()}. " . "Old icon has been deleted", 'NOTICE');
continue;
}
$old_icon->transfer($new_icon->owner_guid, $new_icon->getFilename());
elgg_log("Entity {$entity->guid} has been transferred to a new owner. " . "Icon was moved from {$old_icon->getFilenameOnFilestore()} to {$new_icon->getFilenameOnFilestore()}.", 'NOTICE');
}
}
