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<?php |
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namespace Guillermoandrae\DynamoDb; |
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use ErrorException; |
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7
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abstract class AbstractFilterExpressionAwareRequest extends AbstractItemRequest |
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{ |
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use LimitAwareRequestTrait; |
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/** |
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* @var string The filter expression. |
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*/ |
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protected $filterExpression; |
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/** |
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* Registers the filter expression with this object. |
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* |
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* @param array $data The filter expression data. |
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* @return AbstractFilterExpressionAwareRequest An implementation of this abstract. |
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* @throws ErrorException |
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*/ |
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final public function setFilterExpression(array $data): AbstractFilterExpressionAwareRequest |
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{ |
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$filterExpressionArray = []; |
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foreach ($data as $key => $options) { |
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$filterExpressionArray[] = $this->parseExpression($options['operator'], $key); |
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$this->addExpressionAttributeValue($key, $options['value']); |
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} |
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$this->filterExpression = implode(' and ', $filterExpressionArray); |
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return $this; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function get(): array |
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{ |
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$query = parent::get(); |
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if ($this->limit) { |
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$query['Limit'] = $this->limit; |
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} |
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if ($this->filterExpression) { |
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$query['FilterExpression'] = $this->filterExpression; |
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} |
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return $query; |
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} |
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/** |
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* Uses the operator to build the filter expression. |
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* |
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* @param string $operator The request operator. |
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* @param string $key The attribute key. |
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* @return string The expression. |
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* @throws ErrorException |
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*/ |
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protected function parseExpression(string $operator, string $key): string |
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{ |
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switch ($operator) { |
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case RequestOperators::BEGINS_WITH: |
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return sprintf('begins_with(%s, :%s)', $key, $key); |
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case RequestOperators::CONTAINS: |
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return sprintf('contains(%s, :%s)', $key, $key); |
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case RequestOperators::EQ: |
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return sprintf('%s = :%s', $key, $key); |
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case RequestOperators::GT: |
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return sprintf('%s > :%s', $key, $key); |
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case RequestOperators::GTE: |
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return sprintf('%s >= :%s', $key, $key); |
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case RequestOperators::LT: |
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return sprintf('%s < :%s', $key, $key); |
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case RequestOperators::LTE: |
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return sprintf('%s <= :%s', $key, $key); |
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default: |
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throw new ErrorException('The provided operator is not supported.'); |
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} |
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} |
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} |
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guillermoandrae /
php-dynamodb
