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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2020 (original work) Open Assessment Technologies SA |
| 19 | */ |
| 20 | |
| 21 | declare(strict_types=1); |
| 22 | |
| 23 | namespace oat\taoResultServer\models\Formatter; |
| 24 | |
| 25 | use oat\oatbox\service\ConfigurableService; |
| 26 | |
| 27 | class ItemResponseVariableSplitter extends ConfigurableService |
| 28 | { |
| 29 | public function splitByAttempt(array $itemVariables): array |
| 30 | { |
| 31 | $attempts = []; |
| 32 | |
| 33 | foreach ($itemVariables as $variable) { |
| 34 | if ($variable['identifier'] == 'numAttempts') { |
| 35 | $attempts[(string)$this->getVariableTime($variable['epoch'])] = []; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | foreach ($itemVariables as $variable) { |
| 40 | $cand = null; |
| 41 | $bestDist = null; |
| 42 | |
| 43 | foreach (array_keys($attempts) as $time) { |
| 44 | $dist = abs($time - $this->getVariableTime($variable['epoch'])); |
| 45 | |
| 46 | if (is_null($bestDist) || $dist < $bestDist) { |
| 47 | $bestDist = $dist; |
| 48 | $cand = $time; |
| 49 | } |
| 50 | } |
| 51 | $attempts[$cand][] = $variable; |
| 52 | } |
| 53 | |
| 54 | return $attempts; |
| 55 | } |
| 56 | |
| 57 | public function splitObjByAttempt(array $itemVariables): array |
| 58 | { |
| 59 | $attempts = []; |
| 60 | |
| 61 | foreach ($itemVariables as $variable) { |
| 62 | if ($variable->variable->getIdentifier() == 'numAttempts') { |
| 63 | $attempts[(string)$variable->variable->getCreationTime()] = []; |
| 64 | } |
| 65 | } |
| 66 | foreach ($itemVariables as $variable) { |
| 67 | $cand = null; |
| 68 | $bestDist = null; |
| 69 | |
| 70 | foreach (array_keys($attempts) as $time) { |
| 71 | $dist = abs($time - $variable->variable->getCreationTime()); |
| 72 | |
| 73 | if (is_null($bestDist) || $dist < $bestDist) { |
| 74 | $bestDist = $dist; |
| 75 | $cand = $time; |
| 76 | } |
| 77 | } |
| 78 | $attempts[$cand][] = $variable; |
| 79 | } |
| 80 | |
| 81 | return $attempts; |
| 82 | } |
| 83 | |
| 84 | |
| 85 | private function getVariableTime(string $epoch): float |
| 86 | { |
| 87 | [$usec, $sec] = explode(' ', $epoch); |
| 88 | |
| 89 | return ((float)$usec + (float)$sec); |
| 90 | } |
| 91 | } |