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<?php |
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declare(strict_types=1); |
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namespace Oliverde8\Component\PhpEtl\ChainOperation\Transformer; |
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use oliverde8\AssociativeArraySimplified\AssociativeArray; |
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use Oliverde8\Component\PhpEtl\ChainOperation\AbstractChainOperation; |
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use Oliverde8\Component\PhpEtl\ChainOperation\DataChainOperationInterface; |
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use Oliverde8\Component\PhpEtl\Item\DataItem; |
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use Oliverde8\Component\PhpEtl\Item\DataItemInterface; |
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use Oliverde8\Component\PhpEtl\Item\ItemInterface; |
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use Oliverde8\Component\PhpEtl\Model\ExecutionContext; |
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use Oliverde8\Component\RuleEngine\RuleApplier; |
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/** |
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* Class RuleTransformOperation |
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* |
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* @author de Cramer Oliver<[email protected]> |
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* @copyright 2018 Oliverde8 |
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* @package Oliverde8\Component\PhpEtl\ChainOperation\Transformer |
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*/ |
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class RuleTransformOperation extends AbstractChainOperation implements DataChainOperationInterface |
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{ |
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const VARIABLE_MATCH_REGEX = '/{(?<variables>[^{}]+)}/'; |
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/** @var string[] */ |
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protected array $parsedColumns = []; |
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/** @var RuleApplier */ |
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protected RuleApplier $ruleApplier; |
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/** @var array */ |
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protected array $rules; |
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/** @var boolean */ |
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protected bool $add; |
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public function __construct(RuleApplier $ruleApplier, array $rules, bool $add) |
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{ |
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$this->ruleApplier = $ruleApplier; |
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$this->rules = $rules; |
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$this->add = $add; |
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} |
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public function processData(DataItemInterface $item, ExecutionContext $context): DataItemInterface |
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{ |
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$data = $item->getData(); |
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$newData = []; |
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// We add data and don't send new data. |
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if ($this->add) { |
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$newData = $data; |
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} |
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foreach ($this->rules as $column => $rule) { |
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// Add context to the data. |
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$data['@context'] = array_merge($context->getParameters(), $rule['context'] ?? []); |
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$columnsValues = $this->resolveColumnVariables((string) $column, $data, $newData); |
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$possibleColumns = []; |
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$this->getColumnPossibleValues($column, $columnsValues, [], $possibleColumns); |
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foreach ($possibleColumns as $column => $values) { |
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$data['@column'] = $values; |
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AssociativeArray::setFromKey($newData, $column, $this->ruleApplier->apply($data, $newData, $rule['rules'], [])); |
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} |
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} |
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return new DataItem($newData); |
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} |
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protected function resolveColumnVariables(string $columnString, array $data, array $newData): array |
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{ |
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$variables = $this->getColumnVariables($columnString); |
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$variableValues = []; |
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foreach ($variables as $variable) { |
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$data['@new'] = $newData; |
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$variableValues[] = ['variable' => $variable, 'value' => AssociativeArray::getFromKey($data, $variable, "")]; |
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} |
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return $variableValues; |
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} |
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protected function getColumnPossibleValues( |
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string $columnString, |
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array $variableValues, |
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array $preparedValues, |
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array &$valueCombinations |
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): void { |
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if (empty($variableValues)) { |
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$key = $this->getColumnName($columnString, $preparedValues); |
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$valueCombinations[$key] = $preparedValues; |
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return; |
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} |
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// Shift elements in array. |
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$firsVariable = reset($variableValues); |
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array_shift($variableValues); |
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// Handle possible multi values. |
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if (is_array($firsVariable['value'])) { |
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foreach ($firsVariable['value'] as $value) { |
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$currentPreparedValues = $preparedValues; |
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$currentPreparedValues[$firsVariable['variable']] = $value; |
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$this->getColumnPossibleValues($columnString, $variableValues, $currentPreparedValues, $valueCombinations); |
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} |
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} else { |
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$currentPreparedValues[$firsVariable['variable']] = $firsVariable['value']; |
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$this->getColumnPossibleValues($columnString, $variableValues, $currentPreparedValues, $valueCombinations); |
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} |
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} |
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protected function getColumnName(string $columnString, array $values): string |
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{ |
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$variables = []; |
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$varValues = []; |
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foreach ($values as $variableName => $value) { |
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$variables[] = '{' . $variableName . '}'; |
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$varValues[] = $value; |
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} |
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return str_replace($variables, $varValues, $columnString); |
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} |
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/** |
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* Get variables in a column. |
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*/ |
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protected function getColumnVariables(string $columnsString): array |
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{ |
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if (!isset($this->parsedColumns[$columnsString])) { |
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$matches = []; |
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preg_match_all(self::VARIABLE_MATCH_REGEX, $columnsString, $matches); |
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if (isset($matches['variables'])) { |
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$this->parsedColumns[$columnsString] = $matches['variables']; |
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} else { |
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$this->parsedColumns[$columnsString] = []; |
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} |
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} |
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return $this->parsedColumns[$columnsString]; |
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} |
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} |
oliverde8 /
php-etl
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