public function tags()
{
$this->allowMethods(array('GET'));
if (!$this->permissions->canAccess($this->objectLibraryID)) {
$this->e403();
}
$tags = array();
$totalResults = 0;
$name = $this->objectName;
$fixedValues = array();
// Set of tags matching name
if ($name && $this->subset != 'tags') {
$tagIDs = Zotero_Tags::getIDs($this->objectLibraryID, $name);
if (!$tagIDs) {
$this->e404();
}
$title = "Tags matching ‘" . $name . "’";
} else {
if ($this->scopeObject) {
// If id, redirect to key URL
if ($this->scopeObjectID) {
if (!in_array($this->scopeObject, array("collections", "items"))) {
$this->e400();
}
$className = 'Zotero_' . ucwords($this->scopeObject);
$obj = call_user_func(array($className, 'get'), $this->objectLibraryID, $this->scopeObjectID);
if (!$obj) {
$this->e404("Scope " . substr($this->scopeObject, 0, -1) . " not found");
}
$base = call_user_func(array('Zotero_API', 'get' . substr(ucwords($this->scopeObject), 0, -1) . 'URI'), $obj);
$qs = !empty($_SERVER['QUERY_STRING']) ? '?' . $_SERVER['QUERY_STRING'] : '';
header("Location: " . $base . "/tags" . $qs);
exit;
}
switch ($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 {
$title = "Tags";
$results = Zotero_Tags::getAllAdvanced($this->objectLibraryID, $this->queryParams);
$tags = $results['objects'];
$totalResults = $results['total'];
}
}
if (!empty($tagIDs)) {
foreach ($tagIDs as $tagID) {
$tags[] = Zotero_Tags::get($this->objectLibraryID, $tagID);
}
// Fake sorting and limiting
$totalResults = sizeOf($tags);
$key = $this->queryParams['order'];
// 'title' order means 'name' for tags
if ($key == 'title') {
$key = 'name';
}
$dir = $this->queryParams['sort'];
$cmp = create_function('$a, $b', '$dir = "' . $dir . '" == "asc" ? 1 : -1;
if ($a->' . $key . ' == $b->' . $key . ') {
return 0;
}
else {
return ($a->' . $key . ' > $b->' . $key . ') ? $dir : ($dir * -1);}');
usort($tags, $cmp);
$tags = array_slice($tags, $this->queryParams['start'], $this->queryParams['limit']);
}
$this->responseXML = Zotero_Atom::createAtomFeed($this->getFeedNamePrefix($this->objectLibraryID) . $title, $this->uri, $tags, $totalResults, $this->queryParams, $this->apiVersion, $this->permissions, $fixedValues);
$this->end();
}
