92 lines
2.7 KiB
PHP
92 lines
2.7 KiB
PHP
<?php
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/**
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; under version 2
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* of the License (non-upgradable).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2020 (original work) Open Assessment Technologies SA
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*/
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declare(strict_types=1);
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namespace oat\taoResultServer\models\Formatter;
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use oat\oatbox\service\ConfigurableService;
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class ItemResponseVariableSplitter extends ConfigurableService
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{
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public function splitByAttempt(array $itemVariables): array
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{
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$attempts = [];
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foreach ($itemVariables as $variable) {
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if ($variable['identifier'] == 'numAttempts') {
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$attempts[(string)$this->getVariableTime($variable['epoch'])] = [];
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}
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}
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foreach ($itemVariables as $variable) {
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$cand = null;
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$bestDist = null;
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foreach (array_keys($attempts) as $time) {
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$dist = abs($time - $this->getVariableTime($variable['epoch']));
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if (is_null($bestDist) || $dist < $bestDist) {
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$bestDist = $dist;
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$cand = $time;
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}
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}
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$attempts[$cand][] = $variable;
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}
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return $attempts;
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}
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public function splitObjByAttempt(array $itemVariables): array
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{
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$attempts = [];
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foreach ($itemVariables as $variable) {
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if ($variable->variable->getIdentifier() == 'numAttempts') {
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$attempts[(string)$variable->variable->getCreationTime()] = [];
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}
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}
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foreach ($itemVariables as $variable) {
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$cand = null;
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$bestDist = null;
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foreach (array_keys($attempts) as $time) {
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$dist = abs($time - $variable->variable->getCreationTime());
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if (is_null($bestDist) || $dist < $bestDist) {
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$bestDist = $dist;
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$cand = $time;
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}
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}
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$attempts[$cand][] = $variable;
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}
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return $attempts;
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}
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private function getVariableTime(string $epoch): float
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{
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[$usec, $sec] = explode(' ', $epoch);
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return ((float)$usec + (float)$sec);
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}
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}
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