function SearchByClass($criteria, $sortOrder)
{
assert(isValidSortOrder($sortOrder));
assert(isset($criteria['courseAbbrev']));
assert(isset($criteria['courseNum']));
$subject = $criteria['courseAbbrev'];
$number = $criteria['courseNum'];
assert(isValidCourseNumber($subject, $number));
$dbHandle = GetCachedDBConnection();
$courseid = GetCourseId($subject, $number);
if (is_null($courseid)) {
return null;
}
if ($sortOrder == "date") {
$profids = $dbHandle->SelectAll("SELECT DISTINCT c.profid, \n UNIX_TIMESTAMP(max(o.created)) AS lastrating FROM or_comment c, \n or_comment a, or_objects o, or_professor p WHERE \n c.courseid='{$courseid}' AND c.profid = p.profid AND p.status NOT IN \n " . PROFESSOR_INVISIBLE_STATES . " AND c.status NOT IN \n " . COMMENT_INVISIBLE_STATES . " AND a.status NOT IN \n " . COMMENT_INVISIBLE_STATES . " AND a.profid=p.profid AND \n a.objectid=o.objectid GROUP BY a.profid ORDER BY lastrating desc, \n p.lname, p.fname");
} else {
if ($sortOrder == "rating") {
$profids = $dbHandle->SelectAll("SELECT DISTINCT c.profid, \n ifnull(round(avg(c.ques3), " . EVAL_ROUND_DIGITS . "), -1)\n as coursescore, ifnull(round(avg(a.ques3), \n " . EVAL_ROUND_DIGITS . "), -1) as score FROM or_comment c, \n or_professor p, or_comment a WHERE c.courseid='{$courseid}' and \n c.profid=p.profid and a.profid=p.profid and p.status NOT \n IN " . PROFESSOR_INVISIBLE_STATES . " and c.status NOT IN \n " . COMMENT_INVISIBLE_STATES . " and a.status NOT IN \n " . COMMENT_INVISIBLE_STATES . " GROUP BY c.profid ORDER BY \n score desc, p.lname, p.fname");
} else {
$profids = $dbHandle->SelectAll("SELECT DISTINCT c.profid \n FROM or_comment c, or_professor p WHERE courseid='{$courseid}' and \n c.profid=p.profid AND p.status NOT IN \n " . PROFESSOR_INVISIBLE_STATES . " AND c.status NOT IN \n " . COMMENT_INVISIBLE_STATES . " ORDER BY p.lname, p.fname");
}
}
return $profids;
}
function GetCourseID($abv, $num)
{
assert(isValidCourseNumber($abv, $num));
$dbh = GetCachedDBConnection();
$cid = $dbh->SelectRow("SELECT courseid FROM or_course WHERE abbrev='{$abv}'\n AND number='{$num}'");
// if the course doesn't exist, this will be null
// so we're still good
return $cid['courseid'];
}
function CreateCourse($abbrev, $number, $type, $title)
{
assert(isValidCourseNumber($abbrev, $number));
$dbh = GetCachedDBConnection();
$transactionID = $dbh->BeginTransaction('course-new');
assert(!is_null($transactionID));
$deptid = $dbh->SelectRow("SELECT deptid FROM or_abbrev_map WHERE \n abbrev='{$abbrev}'");
assert(!is_null($deptid['deptid']) && $deptid['deptid'] > 0);
$did = $deptid['deptid'];
$oid = $dbh->GetObjectID();
$sqlCourseTitle = $dbh->Quote($title);
$rows = $dbh->DoOp("INSERT INTO or_course (deptid, abbrev, number, type, \n title, objectid) VALUES ('{$did}', '{$abbrev}', '{$number}', '{$type}', \n '{$sqlCourseTitle}', '{$oid}')");
assert($rows == 1);
$courseid = $dbh->SelectRow("SELECT courseid FROM or_course WHERE \n objectid='{$oid}'");
$transactionEnd = $dbh->EndTransaction();
assert($transactionEnd);
return $courseid['courseid'];
}