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<?php declare(strict_types=1); |
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/** |
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* PHP version 8.0 |
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* |
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* This source file is subject to the license that is bundled with this package in the file LICENSE. |
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*/ |
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namespace PhUml\Code\Variables; |
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use PhUml\Code\Name; |
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use Stringable; |
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/** |
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* It represents a variable's type declaration |
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*/ |
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final class TypeDeclaration implements Stringable |
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{ |
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/** @var string[] All valid types for PHP 7.1, pseudo-types, and aliases */ |
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private const BUILT_IN_TYPES = [ |
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'int', 'bool', 'string', 'array', 'float', 'callable', 'iterable', |
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// union types |
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// https://www.php.net/manual/en/language.types.declarations.php#language.types.declarations.union.nullable |
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'null', |
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// pseudo-types |
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'mixed', 'number', 'object', 'resource', 'self', |
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// aliases |
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'boolean', 'integer', 'double', |
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]; |
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/** @var Name[] */ |
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private array $names; |
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public static function absent(): TypeDeclaration |
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{ |
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return new TypeDeclaration(); |
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} |
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public static function from(?string $type): TypeDeclaration |
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{ |
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return new TypeDeclaration($type === null ? [] : [new Name($type)]); |
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} |
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public static function fromNullable(string $type): TypeDeclaration |
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{ |
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return new TypeDeclaration([new Name($type)], isNullable: true); |
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} |
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/** @param string[] $types */ |
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public static function fromUnionType(array $types): TypeDeclaration |
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{ |
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return new TypeDeclaration(array_map(static fn (string $type) => new Name($type), $types)); |
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} |
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public function isPresent(): bool |
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{ |
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return count($this->names) > 0; |
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} |
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/** @return Name[] */ |
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public function references(): array |
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{ |
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if (! $this->isPresent()) { |
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return []; |
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} |
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if ($this->isBuiltIn()) { |
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return []; |
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} |
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if ($this->isRegularType()) { |
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return [$this->isArray() ? new Name($this->removeArraySuffix()) : $this->names[0]]; |
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} |
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$typesFromUnion = array_map(fn (Name $name) => TypeDeclaration::from((string) $name), $this->names); |
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$references = array_filter($typesFromUnion, fn (TypeDeclaration $type) => ! $type->isBuiltIn()); |
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return array_map( |
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fn (TypeDeclaration $reference) => $reference->isArray() |
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? new Name($reference->removeArraySuffix()) |
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: $reference->names[0], |
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$references |
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); |
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} |
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/** |
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* It helps building the relationships between classes/interfaces since built-in |
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* types are not part of a UML class diagram |
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*/ |
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public function isBuiltIn(): bool |
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{ |
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if (! $this->isRegularType()) { |
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return false; |
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} |
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$type = (string) $this->names[0]; |
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if ($this->isArray()) { |
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$type = $this->removeArraySuffix(); |
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} |
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return in_array($type, self::BUILT_IN_TYPES, true); |
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} |
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private function removeArraySuffix(): string |
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{ |
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return substr((string) $this->names[0], 0, -2); |
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} |
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public function isBuiltInArray(): bool |
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{ |
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if ($this->isRegularType()) { |
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return (string) $this->names[0] === 'array'; |
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} |
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return false; |
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} |
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private function isArray(): bool |
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{ |
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return strpos((string) $this->names[0], '[]') === strlen((string) $this->names[0]) - 2; |
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} |
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public function isNullable(): bool |
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{ |
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return $this->isNullable; |
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} |
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private function isRegularType(): bool |
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{ |
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return count($this->names) === 1; |
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} |
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public function __toString(): string |
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{ |
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return ($this->isNullable ? '?' : '') . implode('|', $this->names); |
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} |
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/** @param Name[] $names */ |
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private function __construct(array $names = [], private bool $isNullable = false) |
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{ |
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$this->names = $names; |
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} |
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} |
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MontealegreLuis /
phuml
