public function tags()
{
$this->allowMethods(['HEAD', 'GET', 'DELETE']);
if (!$this->permissions->canAccess($this->objectLibraryID)) {
$this->e403();
}
if ($this->isWriteMethod()) {
// Check for library write access
if (!$this->permissions->canWrite($this->objectLibraryID)) {
$this->e403("Write access denied");
}
// Make sure library hasn't been modified
$this->checkLibraryIfUnmodifiedSinceVersion(true);
Zotero_Libraries::updateVersionAndTimestamp($this->objectLibraryID);
}
$tagIDs = array();
$results = array();
$name = $this->objectName;
$fixedValues = array();
$this->libraryVersion = Zotero_Libraries::getUpdatedVersion($this->objectLibraryID);
// Set of tags matching name
if ($name && $this->subset != 'tags') {
$this->allowMethods(array('GET'));
$tagIDs = Zotero_Tags::getIDs($this->objectLibraryID, $name);
if (!$tagIDs) {
$this->e404();
}
$title = "Tags matching ‘" . $name . "’";
} else {
$this->allowMethods(array('GET', 'DELETE'));
if ($this->scopeObject) {
$this->allowMethods(array('GET'));
switch ($this->scopeObject) {
case 'collections':
$collection = Zotero_Collections::getByLibraryAndKey($this->objectLibraryID, $this->scopeObjectKey);
if (!$collection) {
$this->e404();
}
$title = "Tags in Collection ‘" . $collection->name . "’";
$counts = $collection->getTagItemCounts();
$tagIDs = array();
if ($counts) {
foreach ($counts as $tagID => $count) {
$tagIDs[] = $tagID;
$fixedValues[$tagID] = array('numItems' => $count);
}
}
break;
case 'items':
$item = Zotero_Items::getByLibraryAndKey($this->objectLibraryID, $this->scopeObjectKey);
if (!$item) {
$this->e404();
}
$title = "Tags of '" . $item->getDisplayTitle() . "'";
$tagIDs = $item->getTags(true);
break;
default:
throw new Exception("Invalid tags scope object '{$this->scopeObject}'");
}
} else {
if ($this->method == 'DELETE') {
// Filter for specific tags with "?tag=foo || bar"
$tagNames = !empty($this->queryParams['tag']) ? explode(' || ', $this->queryParams['tag']) : array();
Zotero_DB::beginTransaction();
foreach ($tagNames as $tagName) {
$tagIDs = Zotero_Tags::getIDs($this->objectLibraryID, $tagName);
foreach ($tagIDs as $tagID) {
$tag = Zotero_Tags::get($this->objectLibraryID, $tagID, true);
Zotero_Tags::delete($this->objectLibraryID, $tag->key);
}
}
Zotero_DB::commit();
$this->e204();
} else {
$title = "Tags";
$results = Zotero_Tags::search($this->objectLibraryID, $this->queryParams);
}
}
}
if ($tagIDs) {
$this->queryParams['tagIDs'] = $tagIDs;
$results = Zotero_Tags::search($this->objectLibraryID, $this->queryParams);
}
$this->generateMultiResponse($results, $title, $fixedValues);
$this->end();
}
