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<?php |
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namespace Respect\Structural\Driver\DynamoDb; |
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use Aws\DynamoDb\DynamoDbClient; |
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use Aws\DynamoDb\Marshaler; |
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use Ramsey\Uuid\Uuid; |
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use Ramsey\Uuid\UuidFactoryInterface; |
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use Respect\Data\CollectionIterator; |
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use Respect\Data\Collections\Collection; |
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use Respect\Structural\Driver as BaseDriver; |
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class Driver implements BaseDriver |
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{ |
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/** |
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* @var \Aws\DynamoDb\DynamoDbClient |
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*/ |
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private $connection; |
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/** |
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* @var \Aws\DynamoDb\Marshaler |
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*/ |
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private $marshaler; |
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/** |
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* @var UuidFactoryInterface |
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*/ |
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private $uuid; |
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/** |
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* Driver constructor. |
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* |
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* @param \Aws\DynamoDb\DynamoDbClient $connection |
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*/ |
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public function __construct(DynamoDbClient $connection, UuidFactoryInterface $uuid) |
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{ |
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$this->connection = $connection; |
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$this->marshaler = new Marshaler(); |
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$this->uuid = $uuid; |
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} |
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/** |
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* @return \Aws\DynamoDb\DynamoDbClient |
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*/ |
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public function getConnection() |
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{ |
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return $this->connection; |
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} |
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/** |
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* @param \Iterator $cursor |
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* |
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* @return array |
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*/ |
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public function fetch(\Iterator $cursor) |
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{ |
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$data = []; |
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if ($cursor->valid()) { |
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$data = $cursor->current(); |
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$cursor->next(); |
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} |
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return $data; |
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} |
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/** |
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* @param array $collection |
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* @param array $query |
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* |
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* @return \Iterator |
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*/ |
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public function find($collection, array $query = []) |
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{ |
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$expression = [ |
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'TableName' => $collection, |
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]; |
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if (!empty($query)) { |
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$expression['ScanFilter'] = $query; |
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} |
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$result = $this->getConnection()->scan($expression); |
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return $this->formatResults($result); |
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} |
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/** |
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* @param Collection $collection |
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* |
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* @return array |
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*/ |
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public function generateQuery(Collection $collection) |
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{ |
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return $this->parseConditions($collection); |
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} |
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/** |
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* @param Collection $collection |
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* |
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* @return array |
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*/ |
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protected function parseConditions(Collection $collection) |
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{ |
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$collections = iterator_to_array( |
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CollectionIterator::recursive($collection) |
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); |
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$collections = array_slice($collections, 1); |
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$condition = $this->getConditionArray($collection); |
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foreach ($collections as $name => $coll) { |
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$condition += $this->getConditionArray($coll); |
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} |
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return $condition; |
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} |
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/** |
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* @param Collection $collection |
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* |
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* @return array |
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*/ |
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protected function getConditionArray(Collection $collection) |
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{ |
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$condition = $collection->getCondition(); |
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if (!is_array($condition)) { |
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$condition = ['_id' => $condition]; |
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} |
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$conditions = []; |
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foreach ($condition as $key => $value) { |
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$conditions = [ |
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$key => [ |
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'AttributeValueList' => [ |
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$this->marshaler->marshalValue($value), |
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], |
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'ComparisonOperator' => 'EQ', |
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], |
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]; |
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} |
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return $conditions; |
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} |
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/** |
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* @param Collection $collection |
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* @param $document |
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*/ |
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public function insert($collection, $document) |
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{ |
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$document->_id = $this->uuid->uuid4()->toString(); |
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$args = [ |
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'TableName' => $collection, |
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'Item' => $this->marshaler->marshalItem($document), |
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]; |
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$this->getConnection()->putItem($args); |
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} |
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/** |
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* @param Collection $collection |
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* @param $criteria |
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* @param $document |
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*/ |
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public function update($collection, $criteria, $document) |
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{ |
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$args = [ |
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'TableName' => $collection, |
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'Key' => $this->marshaler->marshalItem($criteria), |
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'AttributeUpdates' => $this->formatAttributes($document), |
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]; |
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$this->getConnection()->updateItem($args); |
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} |
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/** |
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* @param Collection $collection |
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* @param $criteria |
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*/ |
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public function remove($collection, $criteria) |
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{ |
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$args = [ |
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'TableName' => $collection, |
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'Key' => $this->marshaler->marshalItem($criteria), |
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]; |
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$this->getConnection()->deleteItem($args); |
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} |
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/** |
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* @param $values |
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* |
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* @return array |
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*/ |
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protected function formatAttributes($values) |
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{ |
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$attributes = []; |
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foreach ($values as $key => $value) { |
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$attributes[$key] = [ |
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'Value' => $this->marshaler->marshalValue($value), |
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]; |
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} |
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return $attributes; |
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} |
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protected function formatResults(\Aws\Result $result) |
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{ |
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$items = new \ArrayIterator(); |
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if ($result['Count'] === 0) { |
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return $items; |
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} |
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foreach ($result['Items'] as $item) { |
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$items[] = $this->marshaler->unmarshalItem($item); |
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} |
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return $items; |
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} |
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} |
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