function ajax_termdates()
{
OutputModes('ajax');
if (!CheckPermissions('public')) {
return;
}
$error = false;
$years = array();
if (isset($_GET['years'])) {
$year_ranges = split(',', $_GET['years']);
foreach ($year_ranges as $year_range) {
if ($year_range === '') {
continue;
}
$ends = split('-', $year_range);
if (count($ends) > 2) {
$this->main_frame->Error(array('class' => 'error', 'text' => 'Invalid year range: ' . $year_range));
$error = true;
} else {
if (count($ends) == 1) {
$ends = array($year_range, $year_range);
}
$range_error = false;
foreach ($ends as &$end) {
if (is_numeric($end) && $end >= 1970 && $end < 2037) {
$end = (int) $end;
} else {
$this->main_frame->Error(array('class' => 'error', 'text' => 'Invalid year: ' . $end));
$range_error = true;
}
}
if (!$range_error) {
for ($year = $ends[0]; $year <= $ends[1]; ++$year) {
$years[] = $year;
}
} else {
$error = true;
}
}
}
}
if (!$error) {
$root = array('_tag' => 'calendar', 'termdates' => array());
foreach ($years as $year) {
$acyear = array('_tag' => 'academicyear', '_attr' => array('year' => $year));
for ($term = 0; $term < 6; ++$term) {
$start_ts = Academic_time::StartOfAcademicTerm($year, $term);
$monday_ts = Academic_time::MondayWeek1OfAcademicTerm($year, $term);
$start = new Academic_time($start_ts);
$days = Academic_time::LengthOfAcademicTerm($year, $term);
$end = $start->Adjust($days . 'days');
$monday = new Academic_time($monday_ts);
$acterm = array('_tag' => 'term', '_attr' => array('id' => "term_{$year}_{$term}", 'term' => $term), 'type' => $start->AcademicTermTypeName(), 'name' => $start->AcademicTermName(), 'unique' => $start->AcademicTermNameUnique(), 'start' => $start->Format('Y-m-d'), 'end' => $end->Format('Y-m-d'), 'days' => $days, 'mondayweek1' => $monday->Format('Y-m-d'), 'weeks' => $start->AcademicTermWeeks());
$acyear[] = $acterm;
}
$root['termdates'][] = $acyear;
}
$this->main_frame->SetXml($root);
}
$this->main_frame->Load();
}
/**
* @brief Perform tests on the academic calendar functions.
* @return The number of errors detected.
*
* Runs through every day in the academic calendar checking that the term
* number and week number functions are correct and that days are
* consecutive when calculated using Academic_calendar::Academic.
*/
function PerformTests()
{
// Store the previous date so can see how many days have elapsed
$prev_date = 0;
$errors = 0;
// Go through academic years
for ($year = 2004; $year < 2012; ++$year) {
// Go through all 6 academic terms
for ($term_counter = 0; $term_counter < 6; ++$term_counter) {
// Go through every week in the term
$term_days = Academic_time::LengthOfAcademicTerm($year, $term_counter);
$term_day = 0;
$dow_counter = Academic_time::DayOfStartOfAcademicTerm($year, $term_counter) + 1;
for ($week_counter = 1; $term_day < $term_days; ++$week_counter) {
// Go through every day in the week
for ($dow_counter = $dow_counter; $dow_counter <= 7 && $term_day < $term_days; ++$dow_counter) {
// Create a date object from academic year/term/week/day_of_week
$actime = $this->Academic($year, $term_counter, $week_counter, $dow_counter);
// Create a date object from academic year/term/day_of_term
$actime2 = $this->AcademicDayOfTerm($year, $term_counter, $term_day);
// Detect any inconsistencies
$error_detected = FALSE;
// Do Academic and AcademicDayOfTerm give the same result?
if ($actime != $actime2) {
echo '!!Academic and AcademicDayOfTerm give different results!!<br/>';
++$errors;
$error_detected = TRUE;
}
// Has more than one day elapsed?
if (0 !== $prev_date && 1 !== Academic_time::DaysBetweenTimestamps($prev_date->Timestamp(), $actime->Timestamp())) {
echo '!!days not consecutive!!<br/>';
++$errors;
$error_detected = TRUE;
}
// Is the calculated academic year consistent?
if ($year != $actime->AcademicYear()) {
echo '!!year doesn\'t match!!<br/>';
++$errors;
$error_detected = TRUE;
}
// Is the calculated academic term consistent?
if ($term_counter != $actime->AcademicTerm()) {
echo '!!term doesn\'t match!!<br/>';
++$errors;
$error_detected = TRUE;
}
// Is the calculated academic week consistent?
if ($week_counter != $actime->AcademicWeek()) {
echo '!!week doesn\'t match!!<br/>';
++$errors;
$error_detected = TRUE;
}
if ($error_detected) {
// an error has been detected so print date information
if (0 !== $prev_date) {
// starting with previous date
echo ' prev date: ' . $prev_date->Format(DATE_RFC822) . '<br/>';
//*/
// elapsed days
echo ' days between: ' . Academic_time::DaysBetweenTimestamps($prev_date->Timestamp(), $actime->Timestamp()) . '<br/>';
//*/;
}
// academic date input
echo ' Year: ' . $year . ', Term: ' . $term_counter . ', Week: ' . $week_counter . ', Day of week: ' . $dow_counter . ', Day of term: ' . $term_day . '<br/>';
//*/
// standard date output
echo ' date1: ' . $actime->Format(DATE_RFC822) . '<br/>';
//*/
echo ' date2: ' . $actime2->Format(DATE_RFC822) . '<br/>';
//*/
// gregorian & academic date output
echo ' date: ' . $actime->DayOfMonth() . '/' . $actime->Month() . '/' . $actime->Year() . ': ' . $actime->AcademicWeek() . ',' . $actime->AcademicTermName() . ',' . $actime->AcademicYearName() . '<br/>';
//*/
// data from inside DaysBetweenTimestamps function
// probably no longer required now its fixed
echo ' Day of year of first: ' . (int) date('z', $prev_date->Timestamp()) . '<br/>';
echo ' Day of year of second: ' . (int) date('z', $actime->Timestamp()) . '<br/>';
$difference = (int) date('z', $actime->Timestamp()) - (int) date('z', $prev_date->Timestamp());
if ($difference < 0) {
echo ' Days of year of first: ' . (365 + (int) date('L', $prev_date->Timestamp())) . '<br/>';
}
// New line to seperate error dates
echo '<br/>';
}
$prev_date = $actime;
++$term_day;
}
$dow_counter = 1;
}
}
}
return $errors;
}
