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<?php |
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declare(strict_types=1); |
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namespace Cerbero\LaravelEnum; |
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use UnitEnum; |
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/** |
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* Retrieve the type in common with the given types. |
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*/ |
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function commonType(string ...$types): string |
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{ |
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$null = ''; |
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$types = array_unique($types); |
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if (($index = array_search('null', $types)) !== false) { |
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$null = '?'; |
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unset($types[$index]); |
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} |
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return match (true) { |
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! is_null($common = commonInterfaceOrParent(...$types)) => $null . $common, |
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count($types) == 1 => $null . reset($types), |
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default => implode('|', $types) . ($null ? '|null' : ''), |
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}; |
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} |
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/** |
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* Retrieve the first interface or parent class in common with the given classes. |
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* |
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* @return ?class-string |
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*/ |
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function commonInterfaceOrParent(string ...$classes): ?string |
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{ |
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if ($classes !== array_filter($classes, namespaceExists(...))) { |
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return null; |
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} |
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foreach (['class_implements', 'class_parents'] as $callback) { |
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/** @var array<class-string, class-string> $common */ |
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if ($common = array_intersect(...array_map($callback, $classes))) { |
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return reset($common); |
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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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* Determine whether the given namespace exists. |
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*/ |
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function namespaceExists(string $namespace): bool |
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{ |
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return class_exists($namespace) || interface_exists($namespace); |
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} |
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/** |
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* Retrieve the return type of the given meta for the provided cases. |
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* |
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* @param list<UnitEnum> $cases |
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*/ |
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function metaReturnType(string $meta, array $cases): string |
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{ |
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$returnTypes = array_map(function (UnitEnum $case) use ($meta) { |
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$value = $case->resolveMetaAttribute($meta); |
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return is_string($value) && namespaceExists($value) ? $value : get_debug_type($value); |
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}, $cases); |
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return commonType(...$returnTypes); |
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} |
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cerbero90 /
laravel-enum
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