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<?php |
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declare(strict_types=1); |
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namespace Stadly\PasswordPolice\Rule; |
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use StableSort\StableSort; |
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use Stadly\PasswordPolice\Constraint\CountConstraint; |
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use Stadly\PasswordPolice\Password; |
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use Stadly\PasswordPolice\Policy; |
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use Stadly\PasswordPolice\Rule; |
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use Stadly\PasswordPolice\ValidationError; |
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final class LengthRule implements Rule |
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{ |
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/** |
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* @var CountConstraint[] Rule constraints. |
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*/ |
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private $constraints; |
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/** |
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* @param int $min Minimum password length. |
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* @param int|null $max Maximum password length. |
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* @param int $weight Constraint weight. |
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*/ |
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public function __construct(int $min = 8, ?int $max = null, int $weight = 1) |
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{ |
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$this->addConstraint($min, $max, $weight); |
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} |
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/** |
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* @param int $min Minimum password length. |
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* @param int|null $max Maximum password length. |
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* @param int $weight Constraint weight. |
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* @return $this |
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*/ |
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public function addConstraint(int $min = 8, ?int $max = null, int $weight = 1): self |
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{ |
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$this->constraints[] = new CountConstraint($min, $max, $weight); |
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StableSort::usort($this->constraints, static function (CountConstraint $a, CountConstraint $b): int { |
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return $b->getWeight() <=> $a->getWeight(); |
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}); |
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return $this; |
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} |
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/** |
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* Check whether a password is in compliance with the rule. |
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* |
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* @param Password|string $password Password to check. |
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* @param int|null $weight Don't consider constraints with lower weights. |
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* @return bool Whether the password is in compliance with the rule. |
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*/ |
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public function test($password, ?int $weight = 1): bool |
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{ |
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$count = $this->getCount((string)$password); |
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$constraint = $this->getViolation($count, $weight); |
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return $constraint === null; |
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} |
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/** |
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* Validate that a password is in compliance with the rule. |
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* |
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* @param Password|string $password Password to validate. |
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* @return ValidationError|null Validation error describing why the password is not in compliance with the rule. |
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*/ |
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public function validate($password): ?ValidationError |
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{ |
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$count = $this->getCount((string)$password); |
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$constraint = $this->getViolation($count); |
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if ($constraint !== null) { |
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return new ValidationError( |
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$this->getMessage($constraint, $count), |
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$password, |
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$this, |
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$constraint->getWeight() |
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); |
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} |
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return null; |
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} |
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/** |
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* @param int $count Number of characters. |
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* @param int|null $weight Don't consider constraints with lower weights. |
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* @return CountConstraint|null Constraint violated by the count. |
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*/ |
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private function getViolation(int $count, ?int $weight = null): ?CountConstraint |
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{ |
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foreach ($this->constraints as $constraint) { |
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if ($weight !== null && $constraint->getWeight() < $weight) { |
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continue; |
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} |
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if (!$constraint->test($count)) { |
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return $constraint; |
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} |
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} |
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return null; |
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} |
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/** |
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* @param string $password Password to count characters in. |
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* @return int Number of characters. |
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*/ |
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private function getCount(string $password): int |
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{ |
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return mb_strlen($password); |
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} |
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/** |
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* @param CountConstraint $constraint Constraint that is violated. |
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* @param int $count Count that violates the constraint. |
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* @return string Message explaining the violation. |
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*/ |
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private function getMessage(CountConstraint $constraint, int $count): string |
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{ |
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$translator = Policy::getTranslator(); |
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if ($constraint->getMax() === null) { |
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return $translator->trans( |
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'There must be at least one character.|'. |
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'There must be at least %count% characters.', |
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['%count%' => $constraint->getMin()] |
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); |
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} |
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if ($constraint->getMax() === 0) { |
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return $translator->trans( |
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'There must be no characters.' |
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); |
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} |
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if ($constraint->getMin() === 0) { |
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return $translator->trans( |
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'There must be at most one character.|'. |
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'There must be at most %count% characters.', |
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['%count%' => $constraint->getMax()] |
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); |
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} |
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if ($constraint->getMin() === $constraint->getMax()) { |
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return $translator->trans( |
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'There must be exactly one character.|'. |
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'There must be exactly %count% characters.', |
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['%count%' => $constraint->getMin()] |
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); |
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} |
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return $translator->trans( |
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'There must be between %min% and %max% characters.', |
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['%min%' => $constraint->getMin(), '%max%' => $constraint->getMax()] |
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); |
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} |
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} |
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Stadly /
PasswordPolice
This check looks for parameters that have been defined for a function or method, but which are not used in the method body.