/**
* Validate a CAS string field to make sure that: 1. it fits in the DB, and
* 2. that it is syntactically valid.
* @param array $errors the errors array that validation is assembling.
* @param string $value the submitted value validate.
* @param string $fieldname the name of the field add any errors to.
* @return array updated $errors array.
*/
protected function validate_cas_keyval($errors, $value, $fieldname)
{
if ('' == trim($value)) {
return $errors;
}
$keyval = new stack_cas_keyval($value, $this->options, $this->seed, 't');
if (!$keyval->get_valid()) {
$errors[$fieldname][] = $keyval->get_errors();
}
return $errors;
}
} else {
$simp = false;
}
// Initially simplification should be on.
if (!$vars and !$string) {
$simp = true;
}
if ($string) {
$options = new stack_options();
$options->set_site_defaults();
$options->set_option('simplify', $simp);
$session = new stack_cas_session(null, $options);
if ($vars) {
$keyvals = new stack_cas_keyval($vars, $options, 0, 't');
$session = $keyvals->get_session();
$varerrs = $keyvals->get_errors();
}
if (!$varerrs) {
$ct = new stack_cas_text($string, $session, 0, 't');
$displaytext = $ct->get_display_castext();
$errs = $ct->get_errors();
$debuginfo = $ct->get_debuginfo();
}
}
echo $OUTPUT->header();
echo $OUTPUT->heading($title);
echo html_writer::tag('p', stack_string('chatintro'));
// If we are editing the General Feedback from a question it is very helpful to see the question text.
if ($questionid) {
echo $OUTPUT->heading(stack_string('questiontext'), 3);
echo html_writer::tag('pre', $question->questiontext, array('class' => 'questiontext'));
