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<?php /** * League.Period (https://period.thephpleague.com) * * (c) Ignace Nyamagana Butera <nyamsprod@gmail.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ declare(strict_types=1); namespace League\Period\Chart; use function preg_replace; final class AffixLabel implements LabelGenerator { /** * @var LabelGenerator */ private $labelGenerator; /** * @var string */ private $prefix = ''; /** * @var string */ private $suffix = ''; /** * New instance. */ public function __construct(LabelGenerator $labelGenerator, string $prefix = '', string $suffix = '') { $this->labelGenerator = $labelGenerator; $this->prefix = $this->filterString($prefix); $this->suffix = $this->filterString($suffix); } private function filterString(string $str): string { return (string) preg_replace("/[\r\n]/", '', $str); } /** * {@inheritdoc} */ public function generate(int $nbLabels): \Iterator { foreach ($this->labelGenerator->generate($nbLabels) as $key => $label) { yield $key => $this->prefix.$label.$this->suffix; } } /** * {@inheritdoc} */ public function format(string $label): string { return $this->prefix.$this->labelGenerator->format($label).$this->suffix; } /** * Returns the suffix. */ public function suffix(): string { return $this->suffix; } /** * Returns the prefix. */ public function prefix(): string { return $this->prefix; } /** * Return an instance with the suffix. * * This method MUST retain the state of the current instance, and return * an instance that contains the suffix. */ public function withSuffix(string $suffix): self { $suffix = $this->filterString($suffix); if ($suffix === $this->suffix) { return $this; } $clone = clone $this; $clone->suffix = $suffix; return $clone; } /** * Return an instance with the prefix. * * This method MUST retain the state of the current instance, and return * an instance that contains the prefix. */ public function withPrefix(string $prefix): self { $prefix = $this->filterString($prefix); if ($prefix === $this->prefix) { return $this; } $clone = clone $this; $clone->prefix = $prefix; return $clone; } }
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