/**
* Validate related competency ID.
*
* @param int $data The related competency ID.
* @return true|lang_string
*/
protected function validate_relatedcompetencyid($data)
{
if ($this->get_competencyid() == $data) {
// A competency cannot be related to itself.
return new lang_string('invaliddata', 'error');
}
if ($this->get_competencyid() > $data) {
// The competency ID must be lower than the related competency ID.
return new lang_string('invaliddata', 'error');
} else {
if (!competency::record_exists($data)) {
return new lang_string('invaliddata', 'error');
} else {
if (!competency::share_same_framework(array($data, $this->get_competencyid()))) {
// The competencies must belong to the same framework.
return new lang_string('invaliddata', 'error');
}
}
}
return true;
}
