class StubCaster

class StubCaster {
    public static function castStub(Stub $c, array $a, Stub $stub, bool $isNested) : array {
        if ($isNested) {
            $stub->type = $c->type;
            $stub->class = $c->class;
            $stub->value = $c->value;
            $stub->handle = $c->handle;
            $stub->cut = $c->cut;
            $stub->attr = $c->attr;
            if (Stub::TYPE_REF === $c->type && !$c->class && \is_string($c->value) && !preg_match('//u', $c->value)) {
                $stub->type = Stub::TYPE_STRING;
                $stub->class = Stub::STRING_BINARY;
            }
            $a = [];
        }
        return $a;
    }
    public static function castCutArray(CutArrayStub $c, array $a, Stub $stub, bool $isNested) : array {
        return $isNested ? $c->preservedSubset : $a;
    }
    public static function cutInternals($obj, array $a, Stub $stub, bool $isNested) : array {
        if ($isNested) {
            $stub->cut += \count($a);
            return [];
        }
        return $a;
    }
    public static function castEnum(EnumStub $c, array $a, Stub $stub, bool $isNested) : array {
        if ($isNested) {
            $stub->class = $c->dumpKeys ? '' : null;
            $stub->handle = 0;
            $stub->value = null;
            $stub->cut = $c->cut;
            $stub->attr = $c->attr;
            $a = [];
            if ($c->value) {
                foreach (array_keys($c->value) as $k) {
                    $keys[] = !isset($k[0]) || "\x00" !== $k[0] ? Caster::PREFIX_VIRTUAL . $k : $k;
                }
                // Preserve references with array_combine()
                $a = array_combine($keys, $c->value);
            }
        }
        return $a;
    }
    public static function castScalar(ScalarStub $scalarStub, array $a, Stub $stub) : array {
        $stub->type = Stub::TYPE_SCALAR;
        $stub->attr['value'] = $scalarStub->value;
        return $a;
    }

}