function __construct($crn, $begin_change, $end_change, $day_change = '')
{
// precondition check on begin and end times
if (intval($begin_change) >= intval($end_change)) {
throw new BadTimeSemanticException("begin time must be earlier than end time");
}
// this is the change description for the section (potentially)
$this->desc = array($begin_change, $end_change, $day_change);
// look up the section by CRN; use the selected term code
$use_term = self::$term_id;
$opt = self::$term_id != '' ? "AND term_code = {$use_term}" : "";
$q = new DBQuery("SELECT id, begin_time, end_time, dow FROM banner.section WHERE crn = {$crn} {$opt};");
if ($q->is_empty()) {
throw new SectionNotFoundException();
}
if ($q->get_row_cnt() > 1) {
// this should not occur given preconditions of the database
throw new HandlerException("more than one section found given input CRN");
}
// remember important attributes about the section
$row = $q->get_next_row();
// the query should have only retrieved one query
$this->sid = $row[0];
$this->curdesc = array($row[1], $row[2], $row[3]);
// if no dow was supplied in the section change description, then use the current dow for the course
// this is important as it allows a correct REGEX to be generated by 'generate_sql_where_dow_overlap'
if ($day_change == '') {
$this->desc[2] = $this->curdesc[2];
}
}
if (!isset($_GET) || !array_key_exists('noBackLink', $_GET) || $_GET['noBackLink'] == 'false') {
echo "<a style= \"margin-top:10px;margin-left:10px;\" class=\"pure-button pure-button-primary\" href=\"/index.html\">Banner Main</a></div>";
}
if (!isset($_GET) || !array_key_exists('crn', $_GET)) {
echo "<p><strong>Bad request</strong></p>\n";
exit(0);
}
$crn = $_GET['crn'];
if (!is_numeric($crn)) {
echo "<p>{$crn} is not a valid CRN value</p>";
exit(0);
}
// get the course title information
$q1 = new DBQuery("SELECT subject_code, number, title, begin_time, end_time, dow, first_name, last_name FROM banner.course\nINNER JOIN banner.section ON section.course_id = course.id AND crn={$crn}\nINNER JOIN banner.professor ON professor.id = professor_id;");
if ($q1->is_empty()) {
echo "<p>No results for CRN={$crn}</p>";
exit(0);
}
$heading = $q1->get_next_row();
$q2 = new DBQuery("SELECT student.id, first_name, middle_name, last_name, classification FROM banner.section\nINNER JOIN banner.student_section ON crn={$crn} AND section.id = section_id\nINNER JOIN banner.student ON student_id = student.id\nORDER BY student.classification, last_name;");
if ($q2->is_empty()) {
// section shouldn't be empty
echo "<p>No students where associated with the specified section</p>";
exit(0);
}
echo "<h1>Section listing for {$heading[0]} {$heading[1]} {$heading[2]} [CRN={$crn}]</h1>" . "<h2>Start Time: {$heading[3]}<br />End Time: {$heading[4]}<br />Meeting Days: {$heading[5]}<br />Professor: {$heading[6]} {$heading[7]}</h2>" . $q2->htmlitize();
?>
</center></body>
</html>
