/**
* Find file ids matching the given filter rules
*
* @param array $filterRules
* @return array array of unique file id results
*
* @throws TagNotFoundException whenever a tag was not found
*/
public function processFilterRules($filterRules)
{
$ns = '{' . $this::NS_OWNCLOUD . '}';
$resultFileIds = null;
$systemTagIds = [];
foreach ($filterRules as $filterRule) {
if ($filterRule['name'] === $ns . 'systemtag') {
$systemTagIds[] = $filterRule['value'];
}
}
// check user permissions, if applicable
if (!$this->isAdmin()) {
// check visibility/permission
$tags = $this->tagManager->getTagsByIds($systemTagIds);
$unknownTagIds = [];
foreach ($tags as $tag) {
if (!$tag->isUserVisible()) {
$unknownTagIds[] = $tag->getId();
}
}
if (!empty($unknownTagIds)) {
throw new TagNotFoundException('Tag with ids ' . implode(', ', $unknownTagIds) . ' not found');
}
}
// fetch all file ids and intersect them
foreach ($systemTagIds as $systemTagId) {
$fileIds = $this->tagMapper->getObjectIdsForTags($systemTagId, 'files');
if (empty($fileIds)) {
// This tag has no files, nothing can ever show up
return [];
}
// first run ?
if ($resultFileIds === null) {
$resultFileIds = $fileIds;
} else {
$resultFileIds = array_intersect($resultFileIds, $fileIds);
}
if (empty($resultFileIds)) {
// Empty intersection, nothing can show up anymore
return [];
}
}
return $resultFileIds;
}
/**
* @expectedException \OCP\SystemTag\TagNotFoundException
*/
public function testGetObjectsForNonExistingTag()
{
$this->tagMapper->getObjectIdsForTags([100], 'testtype');
}
