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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) 2023 (original work) Open Assessment Technologies SA; |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | namespace oat\generis\model\kernel\persistence\starsql\search; |
| 23 | |
| 24 | use common_persistence_Manager; |
| 25 | use Laudis\Neo4j\Databags\Statement; |
| 26 | use oat\oatbox\service\ServiceManager; |
| 27 | use oat\search\base\exception\SearchGateWayExeption; |
| 28 | use oat\search\base\QueryBuilderInterface; |
| 29 | use oat\search\base\ResultSetInterface; |
| 30 | use oat\search\ResultSet; |
| 31 | use oat\search\TaoSearchGateWay; |
| 32 | |
| 33 | class GateWay extends TaoSearchGateWay |
| 34 | { |
| 35 | /** |
| 36 | * |
| 37 | * @var \common_persistence_GraphPersistence |
| 38 | */ |
| 39 | protected $connector; |
| 40 | |
| 41 | protected $serialyserList = [ |
| 42 | 'taoRdf' => 'search.neo4j.serialyser' |
| 43 | ]; |
| 44 | |
| 45 | protected $driverList = [ |
| 46 | 'taoRdf' => 'search.driver.neo4j' |
| 47 | ]; |
| 48 | |
| 49 | /** |
| 50 | * resultSet service or className |
| 51 | * @var string |
| 52 | */ |
| 53 | protected $resultSetClassName = ResultSet::class; |
| 54 | |
| 55 | public function init() |
| 56 | { |
| 57 | parent::init(); |
| 58 | |
| 59 | $this->connector = ServiceManager::getServiceManager() |
| 60 | ->get(common_persistence_Manager::SERVICE_ID) |
| 61 | ->getPersistenceById($this->options['persistence'] ?? 'neo4j'); |
| 62 | |
| 63 | return $this; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * try to connect to database. throw an exception |
| 68 | * if connection failed. |
| 69 | * |
| 70 | * @throws SearchGateWayExeption |
| 71 | * @return $this |
| 72 | */ |
| 73 | public function connect() |
| 74 | { |
| 75 | return !is_null($this->connector); |
| 76 | } |
| 77 | |
| 78 | public function search(QueryBuilderInterface $Builder) |
| 79 | { |
| 80 | $result = $this->fetchObjectList(parent::search($Builder)); |
| 81 | $totalCount = $this->count($Builder); |
| 82 | |
| 83 | return new $this->resultSetClassName($result, $totalCount); |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * @param QueryBuilderInterface $Builder |
| 88 | * @param string $propertyUri |
| 89 | * @param bool $isDistinct |
| 90 | * |
| 91 | * @return ResultSetInterface |
| 92 | */ |
| 93 | public function searchTriples(QueryBuilderInterface $Builder, string $propertyUri, bool $isDistinct = false) |
| 94 | { |
| 95 | $result = $this->fetchTripleList( |
| 96 | parent::searchTriples($Builder, $propertyUri, $isDistinct) |
| 97 | ); |
| 98 | |
| 99 | return new $this->resultSetClassName($result, count($result)); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * return total count result |
| 104 | * |
| 105 | * @param QueryBuilderInterface $builder |
| 106 | * |
| 107 | * @return int |
| 108 | */ |
| 109 | public function count(QueryBuilderInterface $builder) |
| 110 | { |
| 111 | return (int)($this->fetchOne(parent::count($builder))); |
| 112 | } |
| 113 | |
| 114 | private function fetchTripleList(Statement $query): array |
| 115 | { |
| 116 | $returnValue = []; |
| 117 | $statement = $this->connector->runStatement($query); |
| 118 | foreach ($statement as $row) { |
| 119 | $triple = new \core_kernel_classes_Triple(); |
| 120 | |
| 121 | $triple->id = $row->get('id', 0); |
| 122 | $triple->subject = $row->get('uri', ''); |
| 123 | $triple->object = $row->get('object') ?? ''; |
| 124 | |
| 125 | $returnValue[] = $triple; |
| 126 | } |
| 127 | return $returnValue; |
| 128 | } |
| 129 | |
| 130 | |
| 131 | private function fetchObjectList(Statement $query): array |
| 132 | { |
| 133 | $returnValue = []; |
| 134 | $statement = $this->connector->runStatement($query); |
| 135 | foreach ($statement as $result) { |
| 136 | $object = $result->current(); |
| 137 | if (!$object) { |
| 138 | continue; |
| 139 | } |
| 140 | $returnValue[] = \common_Utils::toResource($object->getProperty('uri')); |
| 141 | } |
| 142 | return $returnValue; |
| 143 | } |
| 144 | |
| 145 | private function fetchOne(Statement $query) |
| 146 | { |
| 147 | $results = $this->connector->runStatement($query); |
| 148 | return $results->first()->current(); |
| 149 | } |
| 150 | |
| 151 | public function getQuery() |
| 152 | { |
| 153 | if ($this->parsedQuery instanceof Statement) { |
| 154 | return $this->parsedQuery->getText(); |
| 155 | } else { |
| 156 | return ''; |
| 157 | } |
| 158 | } |
| 159 | } |