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<?php |
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namespace Fathomminds\Rest\Database\DynamoDb; |
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use Aws\Sdk; |
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use Aws\DynamoDb\DynamoDbClient as Client; |
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use Fathomminds\Rest\Exceptions\RestException; |
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use Fathomminds\Rest\Contracts\IResource; |
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use Fathomminds\Rest\Helpers\Uuid; |
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use Aws\DynamoDb\Exception\DynamoDbException; |
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use Fathomminds\Rest\Database\DynamoDb\QueryConstructor; |
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class Resource implements IResource |
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{ |
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protected $client; |
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protected $databaseName; |
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protected $collection; |
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protected $fullTableName; |
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protected $resourceName; |
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protected $primaryKey; |
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protected $queryConstructor; |
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public function __construct($resourceName, $primaryKey, Client $client = null, $databaseName = null) |
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{ |
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$this->resourceName = $resourceName; |
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$this->primaryKey = $primaryKey; |
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$this->client = $client === null ? $this->createClient() : $client; |
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$this->databaseName = $databaseName === null ? $this->getFullDatabaseName() : $databaseName; |
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$this->fullTableName = $this->databaseName . '-' . $this->resourceName; |
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$this->queryConstructor = new QueryConstructor; |
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} |
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private function createClient() |
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{ |
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$sdk = new Sdk([ |
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'region' => getenv('AWS_SDK_REGION'), |
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'version' => getenv('AWS_SDK_VERSION'), |
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'http' => [ |
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'verify' => getenv('AWS_SDK_HTTP_VERIFY') === 'false' ? false : getenv('AWS_SDK_HTTP_VERIFY'), |
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] |
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]); |
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return $sdk->createDynamoDb(); |
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} |
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private function getFullDatabaseName() |
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{ |
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return getenv('AWS_DYNAMODB_NAMESPACE') . '-' . getenv('AWS_DYNAMODB_DATABASE'); |
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} |
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public function get($resourceId = null) |
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{ |
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if ($resourceId !== null) { |
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return $this->getOne($resourceId); |
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} |
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return $this->getAll(); |
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} |
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protected function getOne($resourceId) |
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{ |
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$query = $this->queryConstructor->createGetQuery($this->fullTableName, $this->primaryKey, $resourceId); |
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$res = $this->client->getItem($query); |
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return $this->queryConstructor->unmarshalItem($res['Item']); |
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} |
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protected function getAll() |
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{ |
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$query = $this->queryConstructor->createScanQuery($this->fullTableName); |
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$res = $this->client->scan($query); |
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return $this->queryConstructor->unmarshalBatch($res['Items']); |
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} |
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protected function throwAwsPostError($exception) |
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{ |
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switch ($exception->getAwsErrorCode()) { |
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case 'ConditionalCheckFailedException': |
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throw new RestException( |
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'Primary key collision', |
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['exception' => $exception] |
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); |
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} |
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throw new RestException($exception->getMessage(), ['exception' => $exception]); |
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} |
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public function post($newResource) |
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{ |
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try { |
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$query = $this->queryConstructor->createPostQuery($this->fullTableName, $this->primaryKey, $newResource); |
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$this->client->putItem($query); |
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} catch (DynamoDbException $ex) { |
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$this->throwAwsPostError($ex); |
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} catch (\Exception $ex) { |
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throw new RestException($ex->getMessage(), ['exception' => $ex]); |
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} |
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return $newResource; |
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} |
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protected function throwAwsPutError($exception) |
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{ |
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switch ($exception->getAwsErrorCode()) { |
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case 'ConditionalCheckFailedException': |
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throw new RestException( |
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'Resource does not exist', |
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['exception' => $exception] |
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); |
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} |
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throw new RestException($exception->getMessage(), ['exception' => $exception]); |
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} |
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public function patch($resourceId, $newResource) |
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{ |
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return $this->put($resourceId, $newResource); |
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} |
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public function put($resourceId, $newResource) |
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{ |
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try { |
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$newResource->{$this->primaryKey} = $resourceId; |
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$query = $this->queryConstructor->createPutQuery($this->fullTableName, $this->primaryKey, $newResource); |
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$res = $this->client->putItem($query); |
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} catch (DynamoDbException $ex) { |
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$this->throwAwsPutError($ex); |
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} catch (\Exception $ex) { |
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throw new RestException($ex->getMessage(), ['result'=>empty($res)?null:$res]); |
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} |
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return $newResource; |
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} |
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public function delete($resourceId) |
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{ |
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try { |
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$query = $this->queryConstructor->createDeleteQuery($this->fullTableName, $this->primaryKey, $resourceId); |
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$res = $this->client->deleteItem($query); |
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return $resourceId; |
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} catch (\Exception $ex) { |
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throw new RestException($ex->getMessage(), ['result'=>empty($res)?null:$res]); |
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} |
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} |
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} |
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fathomminds /
php-rest-models
