doctrine / dbal

declare(strict_types=1);

namespace Doctrine\DBAL\Tools;

use function class_exists;

use function count;

use function end;

use function explode;

use function extension_loaded;

use function get_class;

use function html_entity_decode;

use function ini_set;

use function is_array;

use function is_object;

use function is_string;

use function ob_get_clean;

use function ob_start;

use function strip_tags;

use function strlen;

use function strrpos;

use function substr;

use function var_dump;

/**

 * Static class used to dump the variable to be used on output.

 * Simplified port of Util\Debug from doctrine/common.

 *

 * @internal

 */

final class Dumper

{

    /**

     * Private constructor (prevents instantiation).

     */

    private function __construct()

    {

    }

    /**

     * Returns a dump of the public, protected and private properties of $var.

     *

     * @link https://xdebug.org/

     *

     * @param mixed $var      The variable to dump.

     * @param int   $maxDepth The maximum nesting level for object properties.

     */

    public static function dump($var, int $maxDepth = 2) : string

    {

        $html = ini_set('html_errors', '1');

        assert(is_string($html));

        if (extension_loaded('xdebug')) {

            ini_set('xdebug.var_display_max_depth', (string) $maxDepth);

        }

            assert(is_string($output));

            return strip_tags(html_entity_decode($output));

        } finally {

            ini_set('html_errors', $html);

        }

    }

    /**

     * @param mixed $var

     *

     * @return mixed

     */

    public static function export($var, int $maxDepth)

    {

        $return = null;

        $isObj  = is_object($var);

        if ($var instanceof Collection) {

            $var = $var->toArray();

        }

        if ($maxDepth === 0) {

            return is_object($var) ? get_class($var)

                : (is_array($var) ? 'Array(' . count($var) . ')' : $var);

        }

        if (is_array($var)) {

            $return = [];

            foreach ($var as $k => $v) {

                $return[$k] = self::export($v, $maxDepth - 1);

            }

            return $return;

        }

        if (! $isObj) {

            return $var;

        }

        $return = new stdClass();

        if ($var instanceof DateTimeInterface) {

            $return->__CLASS__ = get_class($var);

            $return->date      = $var->format('c');

            $return->timezone  = $var->getTimezone()->getName();

            return $return;

        }

        $return->__CLASS__ = self::getClass($var);

        if ($var instanceof Proxy) {

            $return->__IS_PROXY__          = true;

            $return->__PROXY_INITIALIZED__ = $var->__isInitialized();

        }

        if ($var instanceof ArrayObject || $var instanceof ArrayIterator) {

            $return->__STORAGE__ = self::export($var->getArrayCopy(), $maxDepth - 1);

        }

        return self::fillReturnWithClassAttributes($var, $return, $maxDepth);

    }

    /**

     * Fill the $return variable with class attributes

     * Based on obj2array function from {@see https://secure.php.net/manual/en/function.get-object-vars.php#47075}

     *

     * @return mixed

     */

    private static function fillReturnWithClassAttributes(object $var, stdClass $return, int $maxDepth)

    {

        $clone = (array) $var;

        foreach (array_keys($clone) as $key) {

            $aux  = explode("\0", (string) $key);

            $name = end($aux);

            if ($aux[0] === '') {

                $name .= ':' . ($aux[1] === '*' ? 'protected' : $aux[1] . ':private');

            }

            $return->$name = self::export($clone[$key], $maxDepth - 1);

        }

        return $return;

    }

    private static function getClass(object $object) : string

    {

        $class = get_class($object);

        if (! class_exists(Proxy::class)) {

            return $class;

        }

        $pos = strrpos($class, '\\' . Proxy::MARKER . '\\');

        if ($pos === false) {

            return $class;

        }

        return substr($class, $pos + strlen(Proxy::MARKER) + 2);

    }

}