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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 InvalidArgumentException; |
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use Stadly\PasswordPolice\Rule; |
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use Stadly\PasswordPolice\RuleException; |
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use Symfony\Component\Translation\Translator; |
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final class LowerCase implements Rule |
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{ |
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/** |
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* @var int Minimum number of lower case letters in password. |
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*/ |
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private $min; |
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/** |
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* @var int|null Maximum number of lower case letters in password. |
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*/ |
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private $max; |
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public function __construct(int $min, ?int $max = null) |
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{ |
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if ($min < 0) { |
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throw new InvalidArgumentException('Min cannot be negative.'); |
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} |
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if ($max !== null && $max < $min) { |
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throw new InvalidArgumentException('Max cannot be smaller than min.'); |
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} |
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if ($min === 0 && $max === null) { |
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throw new InvalidArgumentException('Min cannot be zero when max is unconstrained.'); |
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} |
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$this->min = $min; |
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$this->max = $max; |
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} |
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public function getMin(): int |
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{ |
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return $this->min; |
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} |
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public function getMax(): ?int |
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{ |
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return $this->max; |
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} |
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public function test(string $password): bool |
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{ |
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if ($this->getCount($password) < $this->min) { |
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return false; |
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} |
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if (null !== $this->max && $this->max < $this->getCount($password)) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @throws RuleException If the rule cannot be enforced. |
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*/ |
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public function enforce(string $password, Translator $translator): void |
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{ |
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if (!$this->test($password)) { |
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throw new RuleException($this, $this->getMessage($translator)); |
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} |
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} |
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public function getMessage(Translator $translator): string |
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{ |
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if ($this->getMax() === null) { |
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return $translator->transChoice( |
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'There must be at least one lower case character.|'. |
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'There must be at least %count% lower case characters.', |
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$this->getMin() |
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); |
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} |
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if ($this->getMax() === 0) { |
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return $translator->trans( |
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'There must be no lower case characters.' |
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); |
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} |
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if ($this->getMin() === 0) { |
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return $translator->transChoice( |
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'There must be at most one lower case character.|'. |
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'There must be at most %count% lower case characters.', |
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$this->getMax() |
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); |
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} |
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if ($this->getMin() === $this->getMax()) { |
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return $translator->transChoice( |
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'There must be exactly one lower case character.|'. |
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'There must be exactly %count% lower case characters.', |
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$this->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% lower case characters.', |
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['%min%' => $this->getMin(), '%max%' => $this->getMax()] |
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); |
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} |
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private function getCount(string $password): int |
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{ |
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$upperCase = mb_strtoupper($password); |
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$passwordCharacters = $this->splitString($password); |
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$upperCaseCharacters = $this->splitString($upperCase); |
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assert(count($passwordCharacters) === count($upperCaseCharacters)); |
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$count = 0; |
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for ($i = count($passwordCharacters)-1; $i >= 0; --$i) { |
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if ($passwordCharacters[$i] !== $upperCaseCharacters[$i]) { |
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++$count; |
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} |
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} |
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return $count; |
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} |
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private function splitString(string $string): array |
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{ |
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$characters = preg_split('{}u', $string, -1, PREG_SPLIT_NO_EMPTY); |
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assert($characters !== false); |
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return $characters; |
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} |
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} |
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Stadly /
PasswordPolice
