// Stack is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Stack. If not, see <http://www.gnu.org/licenses/>.
/**
* Handles ajax requests to validate the input.
*/
define('AJAX_SCRIPT', true);
require_once __DIR__ . '/../../../../../config.php';
require_once $CFG->libdir . '/questionlib.php';
require_once __DIR__ . '/../options.class.php';
require_once __DIR__ . '/inputbase.class.php';
$qaid = required_param('qaid', PARAM_INT);
$inputname = required_param('name', PARAM_ALPHANUMEXT);
$inputvalue = required_param('input', PARAM_RAW);
if (!isloggedin()) {
die;
}
// This should not be necessary, but the TeX filter requires it, because it uses $OUTPUT.
$PAGE->set_context(context_system::instance());
$dm = new question_engine_data_mapper();
$qa = $dm->load_question_attempt($qaid);
$question = $qa->get_question();
$input = $question->inputs[$inputname];
$state = $question->get_input_state($inputname, $input->maxima_to_response_array($inputvalue));
$result = array('input' => $inputvalue, 'status' => $state->status, 'message' => $input->render_validation($state, $qa->get_qt_field_name($inputname)));
header('Content-type: application/json; charset=utf-8');
echo json_encode($result);
