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<?php |
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namespace Wambo\Catalog\Model; |
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use Wambo\Catalog\Error\SlugException; |
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/** |
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* Class Slug represents a human-readable, descriptive URL fragment for the product (e.g. |
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* "fancy-t-shirt-1-with-ice-cream-pooping-unicorn") |
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* |
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* @package Wambo\Catalog\Model |
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*/ |
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class Slug |
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{ |
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/** |
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* @var string $whiteSpacePattern A regular expression that matches white-space characters |
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*/ |
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private $whiteSpacePattern = '/[\s]/'; |
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/** |
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* @var string $invalidCharactersPattern A regular expression that matches all characters that are invalid for a |
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* Slug |
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*/ |
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private $invalidCharactersPattern = '/[^\p{L}\w-_:.,+]/u'; |
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/** |
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* @var int $minLength Defines the minimum length for a Slug |
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*/ |
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private $minLength = 2; |
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/** |
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* @var int $maxLength Defines the maximum length of a Slug |
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*/ |
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private $maxLength = 64; |
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/** |
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* @var string |
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*/ |
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private $slug; |
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/** |
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* Create a new SlugValidator instance. |
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* |
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* @param string $slug human-readable, descriptive URL fragment for the product (e.g. |
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* "fancy-t-shirt-1-with-ice-cream-pooping-unicorn") |
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* |
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* @throws SlugException If the given $slug is invalid |
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*/ |
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public function __construct(string $slug) |
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{ |
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$this->validateSlug($slug); |
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$this->slug = $slug; |
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} |
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/** |
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* Get a string representation of the current Slug. |
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* |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return $this->slug; |
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} |
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/** |
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* Validate the given Slug |
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* |
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* @param string $sku A unique identifier for a product (e.g. "fancy-short-1") |
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* |
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* @return void |
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* |
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* @throws SlugException If the given $sku is invalid |
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*/ |
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private function validateSlug(string $sku) |
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{ |
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if (strlen($sku) == 0) { |
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throw new SlugException("A Slug cannot be empty"); |
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} |
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// check for white-space |
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$containsWhitespace = preg_match($this->whiteSpacePattern, $sku) == 1; |
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if ($containsWhitespace) { |
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throw new SlugException(sprintf("A Slug cannot contain white space characters: \"%s\"", $sku)); |
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} |
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// check for invalid characters |
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$containsInvalidCharacters = preg_match($this->invalidCharactersPattern, $sku) == 1; |
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if ($containsInvalidCharacters) { |
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throw new SlugException(sprintf("The Slug \"%s\" contains invalid characters. A Slug can only contain the following characters: a-z, 0-9 and -", |
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$sku)); |
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} |
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// check minimum length |
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if (strlen($sku) < $this->minLength) { |
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throw new SlugException(sprintf("The given Slug \"%s\" is too short. The minimum length for a Slug is: %s", |
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$sku, $this->minLength)); |
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} |
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// check maximum length |
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if (strlen($sku) > $this->maxLength) { |
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throw new SlugException(sprintf("The given Slug \"%s\" is too long (%s character). The maximum length for a Slug is: %s", |
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strlen($sku), $sku, $this->maxLength)); |
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} |
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} |
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} |
wambo-co /
module-catalog
