public function checkInput()
{
$error = false;
$json = json_decode(ilUtil::stripSlashes($_POST['gap_json_post']));
$_POST['gap'] = ilUtil::stripSlashesRecursive($_POST['gap']);
$gaps_used_in_combination = array();
if (array_key_exists('gap_combination', $_POST)) {
$_POST['gap_combination'] = ilUtil::stripSlashesRecursive($_POST['gap_combination']);
$_POST['gap_combination_values'] = ilUtil::stripSlashesRecursive($_POST['gap_combination_values']);
$gap_with_points = array();
for ($i = 0; $i < count($_POST['gap_combination']['select']); $i++) {
foreach ($_POST['gap_combination']['select'][$i] as $key => $item) {
if ($item == 'none_selected_minus_one') {
return false;
}
$gaps_used_in_combination[$item] = $item;
$check_points_for_best_scoring = false;
foreach ($_POST['gap_combination_values'][$i] as $index => $answeritems) {
foreach ($answeritems as $answeritem) {
if ($answeritem == 'none_selected_minus_one') {
return false;
}
}
$points = $_POST['gap_combination']['points'][$i][$index];
if ($points > 0) {
$check_points_for_best_scoring = true;
}
}
if (!$check_points_for_best_scoring) {
return false;
}
}
}
}
if (isset($_POST['gap']) && is_array($_POST['gap'])) {
foreach ($_POST['gap'] as $key => $item) {
$_POST['clozetype_' . $key] = ilUtil::stripSlashes($_POST['clozetype_' . $key]);
$getType = $_POST['clozetype_' . $key];
$gapsize = $_POST['gap_' . $key . '_gapsize'];
$json[0][$key]->text_field_length = $gapsize > 0 ? $gapsize : '';
if ($getType == CLOZE_TEXT || $getType == CLOZE_SELECT) {
$_POST['gap_' . $key] = ilUtil::stripSlashesRecursive($_POST['gap_' . $key]);
$gapText = $_POST['gap_' . $key];
foreach ($gapText['answer'] as $row => $answer) {
if (!isset($answer) || $answer == '') {
$error = true;
}
}
$points_sum = 0;
if (array_key_exists('points', $gapText)) {
foreach ($gapText['points'] as $row => $points) {
if (isset($points) && $points != '' && is_numeric($points)) {
$points_sum += $points;
} else {
$error = true;
}
}
if (is_array($gap_with_points) && array_key_exists($key, $gap_with_points)) {
$points_sum += $gap_with_points[$key];
}
if ($points_sum == 0) {
if (!array_key_exists($key, $gaps_used_in_combination)) {
$error = true;
}
}
if ($getType == CLOZE_SELECT) {
$_POST['shuffle_' . $key] = ilUtil::stripSlashes($_POST['shuffle_' . $key]);
if (!isset($_POST['shuffle_' . $key])) {
$error = true;
}
}
} else {
$error = true;
}
}
if ($getType == CLOZE_NUMERIC) {
$_POST['gap_' . $key . 'numeric'] = ilUtil::stripSlashes($_POST['gap_' . $key . 'numeric'], FALSE);
$_POST['gap_' . $key . 'numeric_lower'] = ilUtil::stripSlashes($_POST['gap_' . $key . 'numeric_lower'], FALSE);
$_POST['gap_' . $key . 'numeric_upper'] = ilUtil::stripSlashes($_POST['gap_' . $key . 'numeric_upper'], FALSE);
$_POST['gap_' . $key . 'numeric_points'] = ilUtil::stripSlashes($_POST['gap_' . $key . 'numeric_points']);
$mark_errors = array('answer' => false, 'lower' => false, 'upper' => false, 'points' => false);
$eval = new EvalMath();
$eval->suppress_errors = true;
$formula = $_POST['gap_' . $key . '_numeric'];
$result = $eval->e(str_replace(',', '.', $_POST['gap_' . $key . '_numeric'], $formula));
if ($result === false) {
$error = true;
}
$lower = $_POST['gap_' . $key . '_numeric_lower'];
$assClozeTestObject = new assClozeTest();
$has_valid_chars = $assClozeTestObject->checkForValidFormula($lower);
$result = $eval->e(str_replace(',', '.', $lower), FALSE);
if ($result === false || !$has_valid_chars) {
$error = true;
}
$_POST['gap_' . $key . '_numeric_lower'] = $result;
$result = $eval->e(str_replace(',', '.', $_POST['gap_' . $key . '_numeric_upper']), FALSE);
if ($result === false) {
$error = true;
}
$_POST['gap_' . $key . '_numeric_upper'] = $result;
$points = $_POST['gap_' . $key . '_numeric_points'];
if (is_array($gap_with_points) && array_key_exists($key, $gap_with_points)) {
$points += $gap_with_points[$key];
}
if (!isset($points) || $points == '' || !is_numeric($points) || $points == 0) {
if (!array_key_exists($key, $gaps_used_in_combination)) {
$error = true;
}
}
$json[0][$key]->values[0]->error = $mark_errors;
}
}
}
$_POST['gap_json_post'] = json_encode($json);
return !$error;
}
