function validation($data)
{
$errors = parent::validation($data, null);
$colcount = matrix_qtype::count_form_rows_or_cols($data, false);
$rowcount = matrix_qtype::count_form_rows_or_cols($data);
if ($rowcount == 0) {
$errors['rowshort[0]'] = get_string('mustdefine1by1', 'qtype_matrix');
}
if ($colcount == 0) {
$errors['colshort[0]'] = get_string('mustdefine1by1', 'qtype_matrix');
}
if (array_key_exists('grademethod', $data)) {
$grademethod = $data['grademethod'];
} else {
$grademethod = matrix_qtype::single_default_grademethod();
}
if ($grademethod == QTYPE_MATRIX_GRADING_WEIGHTED && empty($data['multiple'])) {
$errors['multiple'] = get_string('weightednomultiple', 'qtype_matrix');
}
$gradeclass = matrix_qtype::grade_class($grademethod, $data['multiple']);
$matrixerrors = $gradeclass->validate_defining_form_matrix($data);
$errors = array_merge($errors, $matrixerrors);
return $errors ? $errors : true;
}
/**
* Save the units and the answers associated with this question.
* @return boolean to indicate success of failure.
*/
function save_question_options($question)
{
$existingdata = self::load_all_data($question->id);
if (!empty($question->makecopy)) {
$existingdata = false;
}
begin_sql();
$matrix = (object) array('questionid' => $question->id, 'multiple' => $question->multiple, 'grademethod' => $question->grademethod, 'renderer' => 'matrix');
if (!$existingdata) {
$matrixid = insert_record('question_matrix', $matrix);
} else {
$matrix->id = $matrixid = $existingdata->id;
update_record('question_matrix', $matrix);
}
$rowcoltemplate = array('matrixid' => $matrixid);
$rowids = array();
// mapping for indexes to db ids.
$colids = array();
$newrowcount = QTYPE_MATRIX_NEWHEADER_STARTCOUNT;
$newcolcount = QTYPE_MATRIX_NEWHEADER_STARTCOUNT;
$colcount = matrix_qtype::count_form_rows_or_cols((array) $question, false);
$rowcount = matrix_qtype::count_form_rows_or_cols((array) $question);
// rows
for ($i = 0; $i < $rowcount; $i++) {
$row = (object) array_merge($rowcoltemplate, array('shorttext' => $question->rowshort[$i], 'description' => aget($question->rowlong, $i, ''), 'feedback' => $question->rowfeedback[$i], 'id' => @$question->rowid[$i]));
if (!$existingdata || !array_key_exists($row->id, $existingdata->rows)) {
$oldid = $row->id;
unset($row->id);
$newid = insert_record('question_matrix_rows', $row);
if (!empty($oldid)) {
// this happens when we copy a question
$rowids[$oldid] = $newid;
} else {
$rowids[$newrowcount] = $newid;
$newrowcount++;
}
} else {
if (array_key_exists($row->id, $existingdata->rows)) {
$rowids[$row->id] = $row->id;
update_record('question_matrix_rows', $row);
}
}
}
// cols
for ($i = 0; $i < $colcount; $i++) {
$col = (object) array_merge($rowcoltemplate, array('shorttext' => $question->colshort[$i], 'description' => $question->collong[$i], 'id' => @$question->colid[$i]));
if (!$existingdata || !array_key_exists($col->id, $existingdata->cols)) {
$oldid = $col->id;
unset($col->id);
$newid = insert_record('question_matrix_cols', $col);
if (!empty($oldid)) {
$colids[$oldid] = $newid;
} else {
$colids[$newcolcount] = $newid;
$newcolcount++;
}
} else {
if (array_key_exists($col->id, $existingdata->cols)) {
$colids[$col->id] = $col->id;
update_record('question_matrix_cols', $col);
}
}
}
$matrix = self::formdata_to_matrix((array) $question);
$gradeclass = matrix_qtype::grade_class($question->grademethod, $question->multiple);
$percents = $gradeclass->store_percentages();
global $CFG;
delete_records_select('question_matrix_weights', 'rowid IN (
SELECT id FROM ' . $CFG->prefix . 'question_matrix_rows
WHERE matrixid = ' . $matrixid . ')
OR colid IN (
SELECT id FROM ' . $CFG->prefix . 'question_matrix_cols
WHERE matrixid = ' . $matrixid . ')');
foreach ($matrix as $r => $row) {
foreach ($row as $c => $cell) {
if (empty($cell)) {
continue;
}
$weight = (object) array('rowid' => $rowids[$r], 'colid' => $colids[$c], 'weight' => $percents ? $cell : '1');
insert_record('question_matrix_weights', $weight);
}
}
if ($rowids) {
delete_records_select('question_matrix_rows', 'matrixid = ' . $matrixid . ' AND id NOT IN (' . implode(',', $rowids) . ')');
}
if ($colids) {
delete_records_select('question_matrix_cols', 'matrixid = ' . $matrixid . ' AND id NOT IN (' . implode(',', $colids) . ')');
}
return commit_sql();
}
