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<?php |
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namespace ByJG\AnyDataset\Store; |
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use ByJG\AnyDataset\Dataset\IteratorFilter; |
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use ByJG\AnyDataset\Enum\Relation; |
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use ByJG\AnyDataset\NoSqlDocument; |
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use ByJG\AnyDataset\NoSqlInterface; |
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use ByJG\Serializer\BinderObject; |
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use ByJG\Util\Uri; |
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use MongoDB\BSON\Binary; |
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use MongoDB\BSON\Decimal128; |
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use MongoDB\BSON\Javascript; |
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use MongoDB\BSON\ObjectID; |
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use MongoDB\BSON\Timestamp; |
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use MongoDB\BSON\UTCDateTime; |
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use MongoDB\Driver\BulkWrite; |
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use MongoDB\Driver\Manager; |
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use MongoDB\Driver\Query; |
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use MongoDB\Driver\WriteConcern; |
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class MongoDbDriver implements NoSqlInterface |
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{ |
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const MONGO_DOCUMENT = [ |
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Binary::class, |
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Decimal128::class, |
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Javascript::class, |
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ObjectID::class, |
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Timestamp::class, |
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UTCDateTime::class, |
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]; |
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/** |
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* |
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* @var Manager; |
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*/ |
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protected $mongoManager = null; |
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/** |
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* Enter description here... |
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* |
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* @var Uri |
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*/ |
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protected $connectionUri; |
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protected $database; |
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/** |
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* Creates a new MongoDB connection. |
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* |
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* mongodb://username:passwortd@host:port/database |
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* |
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* @param Uri $connUri |
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*/ |
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public function __construct(Uri $connUri) |
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{ |
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$this->connectionUri = $connUri; |
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$hosts = $this->connectionUri->getHost(); |
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$port = $this->connectionUri->getPort() == '' ? 27017 : $this->connectionUri->getPort(); |
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$path = preg_replace('~^/~', '', $this->connectionUri->getPath()); |
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$database = $path; |
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$username = $this->connectionUri->getUsername(); |
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$password = $this->connectionUri->getPassword(); |
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if ($username != '' && $password != '') { |
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$auth = array('username' => $username, 'password' => $password, 'connect' => 'true'); |
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} else { |
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$auth = array('connect' => 'true'); |
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} |
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$connectString = sprintf('mongodb://%s:%d', $hosts, $port); |
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$this->mongoManager = new Manager($connectString, $auth); |
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$this->database = $database; |
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} |
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/** |
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* Closes and destruct the MongoDB connection |
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*/ |
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public function __destruct() |
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{ |
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// $this->mongoManager-> |
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} |
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/** |
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* Gets the instance of MongoDB; You do not need uses this directly. |
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* If you have to, probably something is missing in this class |
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* @return Manager |
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*/ |
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public function getDbConnection() |
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{ |
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return $this->mongoManager; |
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} |
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/** |
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* @param $idDocument |
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* @param null $collection |
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* @return \ByJG\AnyDataset\NoSqlDocument|null |
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*/ |
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public function getDocumentById($idDocument, $collection = null) |
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{ |
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$filter = new IteratorFilter(); |
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$filter->addRelation('_id', Relation::EQUAL, $idDocument); |
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$document = $this->getDocuments($filter, $collection); |
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if (empty($document)) { |
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return null; |
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} |
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return $document[0]; |
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} |
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/** |
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* @param \ByJG\AnyDataset\Dataset\IteratorFilter $filter |
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* @param null $collection |
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* @return \ByJG\AnyDataset\NoSqlDocument[]|null |
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*/ |
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public function getDocuments(IteratorFilter $filter, $collection = null) |
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{ |
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if (empty($collection)) { |
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throw new \InvalidArgumentException('Collection is mandatory for MongoDB'); |
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} |
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$dataCursor = $this->mongoManager->executeQuery( |
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$this->database . '.' . $collection, |
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$this->getMongoFilterArray($filter) |
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); |
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if (empty($dataCursor)) { |
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return null; |
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} |
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$data = $dataCursor->toArray(); |
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$result = []; |
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foreach ($data as $item) { |
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$result[] = new NoSqlDocument( |
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$item->_id, |
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$collection, |
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BinderObject::toArrayFrom($item, false, self::MONGO_DOCUMENT) |
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); |
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} |
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return $result; |
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} |
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protected function getMongoFilterArray(IteratorFilter $filter) |
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{ |
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$result = []; |
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foreach ($filter->getRawFilters() as $itemFilter) { |
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$name = $itemFilter[1]; |
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$relation = $itemFilter[2]; |
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$value = $itemFilter[3]; |
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if ($itemFilter[0] == ' or ') { |
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throw new \InvalidArgumentException('MongoDBDriver does not support the addRelationOr'); |
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} |
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if (isset($result[$name])) { |
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throw new \InvalidArgumentException('MongoDBDriver does not support filtering the same field twice'); |
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} |
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switch ($relation) { |
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case Relation::EQUAL: |
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$result[$name] = $value; |
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break; |
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case Relation::GREATER_THAN: |
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$result[$name] = [ '$gt' => $value ]; |
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break; |
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case Relation::LESS_THAN: |
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$result[$name] = [ '$lt' => $value ]; |
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break; |
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case Relation::GREATER_OR_EQUAL_THAN: |
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$result[$name] = [ '$gte' => $value ]; |
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break; |
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case Relation::LESS_OR_EQUAL_THAN: |
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$result[$name] = [ '$lte' => $value ]; |
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break; |
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case Relation::NOT_EQUAL: |
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$result[$name] = [ '$ne' => $value ]; |
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break; |
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case Relation::STARTS_WITH: |
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$result[$name] = [ '$regex' => "^$value" ]; |
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break; |
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case Relation::CONTAINS: |
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$result[$name] = [ '$regex' => "$value" ]; |
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break; |
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} |
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} |
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return new Query($result); |
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} |
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public function deleteDocumentById($idDocument, $collection = null) |
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{ |
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$filter = new IteratorFilter(); |
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$filter->addRelation('_id', Relation::EQUAL, $idDocument); |
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$this->deleteDocuments($filter, $collection); |
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} |
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public function deleteDocuments(IteratorFilter $filter, $collection = null) |
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{ |
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if (empty($collection)) { |
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throw new \InvalidArgumentException('Collection is mandatory for MongoDB'); |
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} |
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$writeConcern = new WriteConcern(WriteConcern::MAJORITY, 100); |
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$bulkWrite = new BulkWrite(); |
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$bulkWrite->delete($this->getMongoFilterArray($filter)); |
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$this->mongoManager->executeBulkWrite( |
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$this->database . '.' . $collection, |
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$bulkWrite, |
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$writeConcern |
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); |
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} |
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public function save(NoSqlDocument $document) |
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{ |
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if (empty($document->getCollection())) { |
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throw new \InvalidArgumentException('Collection is mandatory for MongoDB'); |
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} |
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$writeConcern = new WriteConcern(WriteConcern::MAJORITY, 100); |
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$bulkWrite = new BulkWrite(); |
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$data = BinderObject::toArrayFrom($document->getDocument(), false, self::MONGO_DOCUMENT); |
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$idDocument = $document->getIdDocument(); |
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if (empty($idDocument)) { |
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$idDocument = isset($data['_id']) ? $data['_id'] : null; |
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} |
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$data['updated'] = new UTCDateTime((new \DateTime())->getTimestamp()*1000); |
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if (empty($idDocument)) { |
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$data['_id'] = $idDocument = new ObjectID(); |
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$data['created'] = new UTCDateTime((new \DateTime())->getTimestamp()*1000); |
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$bulkWrite->insert($data); |
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} else { |
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$data['_id'] = $idDocument; |
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$bulkWrite->update(['_id' => $idDocument], ["\$set" => $data]); |
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} |
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$this->mongoManager->executeBulkWrite( |
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$this->database . "." . $document->getCollection(), |
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$bulkWrite, |
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$writeConcern |
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); |
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$document->setDocument($data); |
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$document->setIdDocument($idDocument); |
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return $document; |
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} |
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} |
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If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.