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<?php |
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declare(strict_types=1); |
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namespace Stratadox\TableLoader; |
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use function array_merge; |
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use function implode; |
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use function str_replace as replace; |
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/** |
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* Identifies the entities in the table rows. |
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* |
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* @author Stratadox |
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*/ |
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final class Identified implements IdentifiesEntities |
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{ |
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private const PROBLEMS = ['\\', ':']; |
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private const SOLUTIONS = ['\\\\', '\\:']; |
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private $identifyingColumns; |
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private $columnsForLoading; |
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private function __construct(array $identifyingColumns, array $forLoading) |
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{ |
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$this->identifyingColumns = $identifyingColumns; |
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$this->columnsForLoading = array_merge( |
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$forLoading, |
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$this->identifyingColumns |
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); |
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} |
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/** |
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* Creates an object that identifies entities based on these columns. |
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* |
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* @param string ...$identifyingColumns The columns to use for identification. |
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* |
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* @return IdentifiesEntities The identifying object. |
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*/ |
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public static function by(string ...$identifyingColumns): IdentifiesEntities |
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{ |
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return new self($identifyingColumns, []); |
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} |
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/** @inheritdoc */ |
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public function andForLoading(string ...$columns): IdentifiesEntities |
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{ |
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return new self($this->identifyingColumns, $columns); |
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} |
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/** @inheritdoc */ |
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public function forIdentityMap(array $row): string |
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{ |
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return $this->identifierFor($row, $this->identifyingColumns); |
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} |
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/** @inheritdoc */ |
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public function forLoading(array $row): string |
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{ |
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return $this->identifierFor($row, $this->columnsForLoading); |
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} |
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public function isNullFor(array $row): bool |
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{ |
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foreach ($this->columnsForLoading as $column) { |
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if (null !== $row[$column]) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** @throws CannotIdentifyEntity */ |
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private function identifierFor(array $row, array $identifyingColumns): string |
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{ |
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$id = []; |
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foreach ($identifyingColumns as $column) { |
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$this->mustHave($row, $column); |
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$id[] = replace(self::PROBLEMS, self::SOLUTIONS, $row[$column]); |
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} |
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return implode(':', $id); |
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} |
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/** @throws CannotIdentifyEntity */ |
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private function mustHave(array $row, string $column): void |
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{ |
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if (!isset($row[$column])) { |
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throw MissingIdentifyingColumn::inThe($row, $column); |
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} |
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} |
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} |
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