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<?php |
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declare(strict_types=1); |
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namespace Stratadox\TableLoader\Loader; |
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use function array_filter as filtered; |
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use function array_map as andMapped; |
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use function strlen as lengthOf; |
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use function strpos as positionOf; |
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use function substr as aPortionOf; |
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/** |
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* Limits the data set to the relevant subset. |
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* |
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* @author Stratadox |
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*/ |
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final class Prefixed implements FiltersTheArray |
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{ |
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private $label; |
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private $prefix; |
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private $startingAt; |
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private function __construct(string $label, string $separator) |
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{ |
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$this->label = $label; |
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$this->prefix = $label . $separator; |
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$this->startingAt = lengthOf($this->prefix); |
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} |
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/** |
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* Creates a new array limiter that limits input to fields with this prefix. |
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* |
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* @param string $label The label to use in the prefix. |
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* @param string $separator The separator between the label and the field. |
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* @return FiltersTheArray The prefix limiter. |
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*/ |
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public static function with( |
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string $label, |
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string $separator = '_' |
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): FiltersTheArray { |
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return new self($label, $separator); |
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} |
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/** @inheritdoc */ |
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public function only(array $input): array |
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{ |
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return filtered(andMapped([$this, 'filterOutIrrelevantData'], $input)); |
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} |
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/** @inheritdoc */ |
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public function label(): string |
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{ |
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return $this->label; |
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} |
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private function filterOutIrrelevantData(array $row): array |
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{ |
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$result = []; |
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foreach ($row as $column => $value) { |
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if ($this->isPrefixed($column)) { |
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$result[$this->withoutPrefix($column)] = $value; |
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} |
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} |
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return $result; |
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} |
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private function isPrefixed(string $field): bool |
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{ |
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return positionOf($field, $this->prefix) === 0; |
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} |
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private function withoutPrefix(string $field): string |
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{ |
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return aPortionOf($field, $this->startingAt); |
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} |
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} |
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Stratadox /
TableLoader
