/**
* Answer an TagInfoIterator that lists information on tags attached to an item.
*
* @param object TaggedItem $item
* @return object TagInfoIterator
* @access public
* @since 4/18/08
*/
public function getTagInfoForItem(TaggedItem $item)
{
$query = new SelectQuery();
$query->addTable('tag');
$query->addColumn('value');
$query->addColumn('user_id');
$query->addColumn('tstamp');
$query->addWhereEqual("fk_item", $item->getDatabaseId());
$dbc = Services::getService("DatabaseManager");
$result = $dbc->query($query, $this->getDatabaseIndex());
$iterator = new HarmoniIterator(array());
$idManager = Services::getService("Id");
while ($result->hasNext()) {
$row = $result->next();
$iterator->add(new TagInfo(new Tag($row['value']), $item, $idManager->getId($row['user_id']), DateAndTime::fromString($row['tstamp'])));
}
return $iterator;
}
/**
* Return the next Qualifier.
*
* @return object Qualifier
*
* @throws object HierarchyException An exception with one of
* the following messages defined in
* org.osid.hierarchy.HierarchyException may be thrown: {@link
* org.osid.hierarchy.HierarchyException#OPERATION_FAILED
* OPERATION_FAILED}, {@link
* org.osid.hierarchy.HierarchyException#PERMISSION_DENIED
* PERMISSION_DENIED}, {@link
* org.osid.hierarchy.HierarchyException#CONFIGURATION_ERROR
* CONFIGURATION_ERROR}, {@link
* org.osid.hierarchy.HierarchyException#UNIMPLEMENTED
* UNIMPLEMENTED}, {@link
* org.osid.hierarchy.HierarchyException#NO_MORE_ITERATOR_ELEMENTS
* NO_MORE_ITERATOR_ELEMENTS}
*
* @access public
*/
function next()
{
// If this is the first element access, inform our AZ cache that we are
// working with this set of nodes so that it can fetch AZs for all of
// them at once.
if ($this->_i == -1) {
$isAuthorizedCache = IsAuthorizedCache::instance();
$isAuthorizedCache->queueAssetArray($this->_elements);
}
return parent::next();
}
/**
* Answer an iterator of groups that contain the Id. If $includeSubgroups
* is true then groups will be returned if any descendent group contains
* the Id.
*
* @param object Id $id
* @return object AgentIterator
* @access public
* @since 2/23/06
*/
function getGroupsContainingGroup($id, $includeSubgroups)
{
$result = $this->_queryDirectory('get_group', array('id' => $id->getIdString(), 'include_membership' => 'true'));
$groups = new HarmoniIterator(array());
foreach ($result->getElementsByTagNameNS('http://www.yale.edu/tp/cas', 'attribute') as $element) {
if ($element->getAttribute('name') == 'MemberOf') {
$groups->add(new CASGroup(new HarmoniId($element->getAttribute('value')), $this));
}
}
return $groups;
}
/**
* Answer the replies in ascending or descending time.
*
* @param string $order The constant ASC or DESC for ascending time (oldest
* first) or decending time (recent first).
* @return iterator
* @access public
* @since 7/3/07
*/
function getReplies($order = ASC)
{
// Load the replies, their creation times into arrays for caching and
// easy sorting.
if (!isset($this->_replies)) {
$this->_replyIds = array();
$this->_replyTimes = array();
$mediaFileType = new Type('segue', 'edu.middlebury', 'media_file', 'A file that is uploaded to Segue.');
$children = $this->_asset->getAssets();
while ($children->hasNext()) {
$child = $children->next();
if (!$mediaFileType->isEqual($child->getAssetType())) {
$dateTime = $child->getCreationDate();
$this->_replyIds[] = $child->getId();
$this->_replyTimes[] = $dateTime->asString();
}
}
}
// Sort the reply Ids based on time.
array_multisort($this->_replyIds, $this->_replyTimes, $order == ASC ? SORT_ASC : SORT_DESC);
$null = null;
$replies = new HarmoniIterator($null);
$commentManager = CommentManager::instance();
foreach ($this->_replyIds as $id) {
$replies->add($commentManager->getComment($id));
}
return $replies;
}
/**
* Answer all of the comments attached to an asset
*
* @param object $assetOrId An Asset object or an Id object
* @param string $order The constant ASC or DESC for ascending time (oldest
* first) or decending time (recent first).
* @return object Iterator
* @access public
* @since 7/3/07
*/
function getAllComments($assetOrId, $order = ASC)
{
ArgumentValidator::validate($assetOrId, OrValidatorRule::getRule(ExtendsValidatorRule::getRule('Asset'), ExtendsValidatorRule::getRule('Id')));
if (method_exists($assetOrId, 'getId')) {
$asset = $assetOrId;
$assetId = $asset->getId();
} else {
$repositoryManager = Services::getService("Repository");
$idManager = Services::getService("Id");
$repository = $repositoryManager->getRepository($idManager->getId("edu.middlebury.segue.sites_repository"));
$asset = $repository->getAsset($assetOrId);
$assetId = $assetOrId;
}
// Load the replies, their creation times into arrays for caching and
// easy sorting.
$assetIdString = $assetId->getIdString();
if (!isset($this->_allComments[$assetIdString])) {
$this->_allComments[$assetIdString] = array();
$this->_allComments[$assetIdString]['ids'] = array();
$this->_allComments[$assetIdString]['times'] = array();
$rootComments = $this->getRootComments($asset);
$allComments = new MultiIteratorIterator();
while ($rootComments->hasNext()) {
$allComments->addIterator($this->_getDescendentComments($rootComments->next()));
}
while ($allComments->hasNext()) {
$comment = $allComments->next();
$dateTime = $comment->getCreationDate();
$this->_allComments[$assetIdString]['ids'][] = $comment->getId();
$this->_allComments[$assetIdString]['times'][] = $dateTime->asSeconds();
}
}
// Sort the comment Ids based on time.
array_multisort($this->_allComments[$assetIdString]['times'], SORT_NUMERIC, $order == ASC ? SORT_ASC : SORT_DESC, $this->_allComments[$assetIdString]['ids']);
$null = null;
$comments = new HarmoniIterator($null);
foreach ($this->_allComments[$assetIdString]['ids'] as $id) {
$comments->add($this->getComment($id));
}
return $comments;
}
