/**
* Answer agentIds that have stored tags
*
* @return object IdIterator
* @access public
* @since 11/1/06
*/
function getAgentIds()
{
$query = new SelectQuery();
$query->addColumn('user_id');
$query->addColumn('COUNT(user_id)', 'occurances');
$query->addTable('tag');
$query->setGroupBy(array('user_id'));
$query->addOrderBy('occurances', DESCENDING);
$dbc = Services::getService("DatabaseManager");
$result = $dbc->query($query, $this->getDatabaseIndex());
// Add tag objects to an array, still sorted by frequency of usage
$agentIds = array();
$idManager = Services::getService('Id');
while ($result->hasNext()) {
$row = $result->next();
$agentIds[] = $idManager->getId($row['user_id']);
}
$iterator = new HarmoniIterator($agentIds);
return $iterator;
}
/**
* Return the priority types available with this implementation.
*
* @return object TypeIterator
*
* @throws object LoggingException An exception with one of the
* following messages defined in org.osid.logging.LoggingException
* may be thrown: {@link
* org.osid.logging.LoggingException#UNIMPLEMENTED UNIMPLEMENTED},
* {@link org.osid.logging.LoggingException#OPERATION_FAILED
* OPERATION_FAILED}, {@link
* org.osid.logging.LoggingException#CONFIGURATION_ERROR
* CONFIGURATION_ERROR}, {@link
* org.osid.logging.LoggingException#PERMISSION_DENIED
* PERMISSION_DENIED}
*
* @access public
*/
function getPriorityTypes()
{
$dbc = Services::getService("DatabaseManager");
$query = new SelectQuery();
$query->addColumn("domain", "domain", "log_type");
$query->addColumn("authority", "authority", "log_type");
$query->addColumn("keyword", "keyword", "log_type");
$query->addColumn("description", "description", "log_type");
$query->addTable("log_entry");
$query->addTable("log_type", INNER_JOIN, "log_entry.fk_priority_type = log_type.id");
$query->setGroupBy(array("log_type.id"));
$query->addOrderBy("keyword");
$results = $dbc->query($query, $this->_dbIndex);
$types = array();
// Add a custom type to encompass all priority types
$types[] = new Type('logging', 'edu.middlebury', 'All', _('All priority types.'));
while ($results->hasNext()) {
$types[] = new Type($results->field("domain"), $results->field("authority"), $results->field("keyword"), $results->field("description"));
$results->advanceRow();
}
$results->free();
$iterator = new HarmoniIterator($types);
return $iterator;
}
/**
* Answer all items with this tag in a particular system
*
* @return object ItemsIterator
* @access public
* @since 11/2/06
*/
function getItemsInSystem($system)
{
$dbc = Services::getService("DatabaseManager");
$subQuery = new SelectQuery();
$subQuery->addColumn('tag_item.db_id');
$subQuery->addColumn('tag_item.id');
$subQuery->addColumn('tag_item.system');
$subQuery->addColumn('tag.tstamp');
$subQuery->addTable('tag');
$subQuery->addTable('tag_item', INNER_JOIN, "tag.fk_item = tag_item.db_id");
$subQuery->addWhere("tag.value='" . addslashes($this->getValue()) . "'");
$subQuery->addWhere("tag_item.system='" . addslashes($system) . "'");
$subQuery->addOrderBy('tag.tstamp', DESCENDING);
$query = new SelectQuery();
$query->addColumn('*');
$query->addTable("(" . $dbc->generateSQL($subQuery, $this->getDatabaseIndex()) . ") AS tag_results");
$query->setGroupBy(array('db_id'));
$result = $dbc->query($query, $this->getDatabaseIndex());
$iterator = new TaggedItemIterator($result);
return $iterator;
}
/**
* Get all the Function of the specified Type.
* @param ref object functionType the Type of the Functions to return
* @return ref object FunctionIterator
*/
function getFunctionTypes()
{
if (!isset($this->_functionTypes)) {
$dbHandler = Services::getService("DatabaseManager");
$query = new SelectQuery();
$query->addColumn("type_domain", "domain", "type");
$query->addColumn("type_authority", "authority", "type");
$query->addColumn("type_keyword", "keyword", "type");
$query->addColumn("type_description", "type_description", "type");
$query->addTable("az_function");
$joinc = "fk_type = " . "type.type_id";
$query->addTable("type", INNER_JOIN, $joinc);
$query->setGroupBy(array("type_domain", "type_authority", "type_keyword", "type_description"));
$queryResult = $dbHandler->query($query, $this->_dbIndex);
$this->_functionTypes = array();
while ($queryResult->hasMoreRows()) {
$row = $queryResult->getCurrentRow();
// echo "<pre>";
// print_r($row);
// echo "</pre>";
$this->_functionTypes[] = new HarmoniType($row['domain'], $row['authority'], $row['keyword'], $row['type_description']);
$queryResult->advanceRow();
}
$queryResult->free();
}
$obj = new HarmoniTypeIterator($this->_functionTypes);
return $obj;
}
