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<?php |
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namespace Hoooklife\DynamodbPodm\Grammars; |
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use Aws\DynamoDb\Marshaler; |
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use Hoooklife\DynamodbPodm\Collection; |
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use Hoooklife\DynamodbPodm\DB; |
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use Hoooklife\DynamodbPodm\Query\Builder; |
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use Hoooklife\DynamodbPodm\Grammars\DynamoDBBuilder; |
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class DynamoDBGrammar |
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{ |
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protected $operators = []; |
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protected $params = []; |
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protected $insertParam = []; |
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/** |
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* @var Builder |
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*/ |
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private $builder; |
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/** |
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* @var array |
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*/ |
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private $config; |
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private $dynamoDBBuilder; |
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private $attributeValues = []; |
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/** @var Marshaler $marshaler */ |
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private $marshaler; |
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/** |
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* DynamoDBGrammar constructor. |
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* @param Builder $builder |
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* @param array $config |
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*/ |
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public function __construct(Builder $builder, array $config) |
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{ |
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$this->builder = $builder; |
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$this->config = $config; |
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$this->dynamoDBBuilder = new DynamoDBBuilder($config); |
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$this->marshaler = new Marshaler(); |
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} |
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// 表达式解析 where |
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private function parseKeyConditionExpression() |
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{ |
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$expression = []; |
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foreach ($this->builder->wheres as $index => $where) { |
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$expression[] = "{$where['column']} {$where['operator']} :{$index}"; |
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// param bind |
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$this->attributeValues[':' . $index] = $where['value']; |
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} |
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return implode("and", $expression); |
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} |
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public function parseExpressionAttributeValues() |
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{ |
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return $this->marshaler->marshalItem($this->attributeValues); |
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} |
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// select |
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public function parseProjectionExpression() |
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{ |
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if (reset($this->builder->columns) != '*') { |
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return implode(",", $this->columns); |
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} |
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return null; |
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} |
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// limit |
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public function parseLimit() |
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{ |
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return $this->builder->limit; |
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} |
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/** |
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* Get the grammar specific operators. |
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* |
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* @return array |
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*/ |
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public function getOperators() |
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{ |
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return $this->operators; |
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} |
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public function insert($data) |
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{ |
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$this->createInsertParam($data); |
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$builder = $this->dynamoDBBuilder |
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->setRequestItems([$this->builder->table => $this->insertParam]); |
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return $builder->batchWriteItem(); |
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} |
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protected function createInsertParam($data) |
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{ |
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foreach ($data as $key => $value) { |
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if (is_numeric($key) && is_array($value)) { |
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$this->createInsertParam($value); |
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} else { |
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$this->insertParam[] = [ |
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'PutRequest' => [ |
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'Item' => $this->marshaler->marshalItem($data) |
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] |
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]; |
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break; |
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} |
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} |
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} |
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public function all($columns): Collection |
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{ |
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$builder = $this->dynamoDBBuilder |
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->setTableName($this->builder->table) |
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->setKeyConditionExpression($this->parseKeyConditionExpression()) |
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->setExpressionAttributeValues($this->parseExpressionAttributeValues()); |
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return new Collection($builder->query()); |
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} |
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128
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} |
hooklife /
DynamoDBODM
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