/**
* Change the Enrollment Status Type for the student on the roster.
*
* @param object Id $agentId
* @param object Type $enrollmentStatusType
*
* @throws object CourseManagementException An exception
* with one of the following messages defined in
* org.osid.coursemanagement.CourseManagementException may be
* thrown: {@link
* org.osid.coursemanagement.CourseManagementException#OPERATION_FAILED
* OPERATION_FAILED}, {@link
* org.osid.coursemanagement.CourseManagementException#PERMISSION_DENIED
* PERMISSION_DENIED}, {@link
* org.osid.coursemanagement.CourseManagementException#CONFIGURATION_ERROR
* CONFIGURATION_ERROR}, {@link
* org.osid.coursemanagement.CourseManagementException#UNIMPLEMENTED
* UNIMPLEMENTED}, {@link
* org.osid.coursemanagement.CourseManagementException#NULL_ARGUMENT
* NULL_ARGUMENT}, {@link
* org.osid.coursemanagement.CourseManagementException#UNKNOWN_TYPE
* UNKNOWN_TYPE}
*
* @access public
*/
function changeStudent(Id $agentId, Type $enrollmentStatusType)
{
$dbManager = Services::getService("DatabaseManager");
$query = new SelectQuery();
$query->addTable('cm_enroll');
$query->addWhere("fk_cm_section='" . addslashes($this->_id->getIdString()) . "'");
$query->addWhere("fk_student_id='" . addslashes($agentId->getIdString()) . "'");
//I don't need Id, but I need to select something for the query to work
$query->addColumn('id');
$res = $dbManager->query($query);
if ($res->getNumberOfRows() == 0) {
throwError(new Error("Cannot change status of student [" . $agentId->getIDString() . "] because that student in not enrolled in the course[" . $this->_id->getIdString() . "]", "CourseManagement", true));
} else {
if ($res->getNumberOfRows() > 1) {
print "<b>Warning!</b> Student with id " . $agentId->getIdString() . " is already enrolled in section " . $this->getDisplayName() . " twice.";
}
}
$typeIndex = $this->_typeToIndex('enroll_stat', $enrollmentStatusType);
$query = new UpdateQuery();
$query->setTable('cm_enroll');
$query->addWhere("fk_cm_section='" . addslashes($this->_id->getIdString()) . "'");
$query->addWhere("fk_student_id='" . addslashes($agentId->getIdString()) . "'");
$query->setColumns(array('fk_cm_enroll_stat_type'));
$query->setValues(array("'" . addslashes($typeIndex) . "'"));
$dbManager->query($query);
}