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<?php |
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namespace Fathomminds\Rest\Database\DynamoDb; |
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use Aws\DynamoDb\DynamoDbClient; |
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use Aws\DynamoDb\Marshaler; |
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class QueryConstructor |
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{ |
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public function marshalItem($resource) |
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{ |
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$marshaler = new Marshaler; |
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$toMarshal = $resource; |
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if (gettype($resource) === 'object') { |
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$toMarshal = new \StdClass; |
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foreach (get_object_vars($resource) as $name => $value) { |
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$toMarshal->$name = $value; |
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} |
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} |
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return $marshaler->marshalItem($toMarshal); |
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} |
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public function unmarshalItem($item) |
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{ |
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$marshaler = new Marshaler; |
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if ($item === null) { |
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return new \StdClass; |
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} |
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return $marshaler->unmarshalItem($item, true); |
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} |
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public function unmarshalBatch($itemList) |
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{ |
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if ($itemList === null) { |
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return []; |
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} |
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$list = []; |
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foreach ($itemList as $item) { |
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$list[] = $this->unmarshalItem($item); |
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} |
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return $list; |
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} |
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public function createGetQuery($tableName, $primaryKey, $resourceId) |
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{ |
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$query = [ |
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'TableName' => $tableName, |
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'Key' => $this->marshalItem([$primaryKey => $resourceId]), |
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]; |
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return $query; |
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} |
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public function createScanQuery($tableName) |
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{ |
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$query = [ |
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'TableName' => $tableName, |
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]; |
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return $query; |
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} |
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public function createPostQuery($tableName, $primaryKey, $newResource) |
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{ |
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$query = [ |
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'TableName' => $tableName, |
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'Item' => $this->marshalItem($newResource), |
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'ConditionExpression' => 'attribute_not_exists(#pk)', |
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"ExpressionAttributeNames" => ["#pk" => $primaryKey], |
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]; |
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return $query; |
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} |
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public function createPutQuery($tableName, $primaryKey, $newResource) |
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{ |
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$query = [ |
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'TableName' => $tableName, |
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'Item' => $this->marshalItem($newResource), |
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'ConditionExpression' => 'attribute_exists(#pk)', |
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"ExpressionAttributeNames" => ["#pk" => $primaryKey], |
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]; |
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return $query; |
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} |
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public function createDeleteQuery($tableName, $primaryKey, $resourceId) |
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{ |
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$query = [ |
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'TableName' => $tableName, |
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'Key' => $this->marshalItem([$primaryKey => $resourceId]), |
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]; |
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return $query; |
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} |
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} |
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fathomminds /
php-rest-models
