public function validation($data, $files)
{
$errors = parent::validation($data, $files);
// Check number of appointments vs exclusivity
$numappointments = 0;
for ($i = 0; $i < $data['appointment_repeats']; $i++) {
if ($data['studentid'][$i] > 0) {
$numappointments++;
}
}
if ($data['exclusivityenable'] && $data['exclusivity'] <= 0) {
$errors['exclusivitygroup'] = get_string('exclusivitypositive', 'scheduler');
} else {
if ($data['exclusivityenable'] && $numappointments > $data['exclusivity']) {
$errors['exclusivitygroup'] = get_string('exclusivityoverload', 'scheduler', $numappointments);
}
}
// Avoid empty slots starting in the past
if ($numappointments == 0 && $data['starttime'] < time()) {
$errors['starttime'] = get_string('startpast', 'scheduler');
}
// Check whether students have been selected several times
for ($i = 0; $i < $data['appointment_repeats']; $i++) {
for ($j = 0; $j < $i; $j++) {
if ($data['studentid'][$i] > 0 && $data['studentid'][$i] == $data['studentid'][$j]) {
$errors['studgroup[' . $i . ']'] = get_string('studentmultiselect', 'scheduler');
$errors['studgroup[' . $j . ']'] = get_string('studentmultiselect', 'scheduler');
}
}
}
if (!isset($data['ignoreconflicts'])) {
// Avoid overlapping slots, by asking the user if they'd like to overwrite the existing ones...
// for other scheduler, we check independently of exclusivity. Any slot here conflicts
// for this scheduler, we check against exclusivity. Any complete slot here conflicts
$conflicts_remote = scheduler_get_conflicts($this->scheduler->id, $data['starttime'], $data['starttime'] + $data['duration'] * 60, $data['teacherid'], 0, SCHEDULER_OTHERS, false);
$conflicts_local = scheduler_get_conflicts($this->scheduler->id, $data['starttime'], $data['starttime'] + $data['duration'] * 60, $data['teacherid'], 0, SCHEDULER_SELF, true);
if (!$conflicts_remote) {
$conflicts_remote = array();
}
if (!$conflicts_local) {
$conflicts_local = array();
}
$conflicts = $conflicts_remote + $conflicts_local;
// remove itself from conflicts when updating
if (array_key_exists($this->slotid, $conflicts)) {
unset($conflicts[$this->slotid]);
}
if (count($conflicts)) {
$msg = get_string('slotwarning', 'scheduler');
foreach ($conflicts as $conflict) {
$students = scheduler_get_appointed($conflict->id);
$slotmsg = userdate($conflict->starttime);
$slotmsg .= ' [';
$slotmsg .= $conflict->duration . ' ' . get_string('minutes');
$slotmsg .= ']';
if ($students) {
$slotmsg .= ' (';
$appointed = array();
foreach ($students as $astudent) {
$appointed[] = fullname($astudent);
}
if (count($appointed)) {
$slotmsg .= implode(', ', $appointed);
}
unset($appointed);
$slotmsg .= ')';
$slotmsg = html_writer::tag('b', $slotmsg);
}
$msg .= html_writer::div($slotmsg);
}
$errors['starttime'] = $msg;
}
}
return $errors;
}
}
if (count($conflicts)) {
if ($subaction == 'confirmdelete' && confirm_sesskey()) {
foreach ($conflicts as $conflict) {
if ($conflict->id != @$slotid) {
delete_records('scheduler_slots', 'id', $conflict->id);
delete_records('scheduler_appointment', 'slotid', $conflict->id);
scheduler_delete_calendar_events($conflict);
}
}
} else {
echo "<br/><br/>";
print_simple_box_start('center', '', '');
echo get_string('slotwarning', 'scheduler') . '<br/><br/>';
foreach ($conflicts as $conflict) {
$students = scheduler_get_appointed($conflict->id);
echo !empty($students) ? '<b>' : '';
echo userdate($conflict->starttime);
echo ' [';
echo $conflict->duration . ' ' . get_string('minutes');
echo ']<br/>';
if ($students) {
$appointed = array();
foreach ($students as $aStudent) {
$appointed[] = fullname($aStudent);
}
if (count($appointed)) {
echo '<span style="font-size : smaller">';
echo implode(', ', $appointed);
echo '</span>';
}
