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<?php
/**
 * Part of the Joomla Framework Registry Package
 *
 * @copyright  Copyright (C) 2005 - 2021 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Registry\Format;

use Joomla\Registry\FormatInterface;

/**
 * PHP class format handler for Registry
 *
 * @since  1.0
 */
class Php implements FormatInterface
{
	/**
	 * Converts an object into a php class string.
	 * - NOTE: Only one depth level is supported.
	 *
	 * @param   object  $object  Data Source Object
	 * @param   array   $params  Parameters used by the formatter
	 *
	 * @return  string  Config class formatted string
	 *
	 * @since   1.0
	 */
	public function objectToString($object, array $params = [])
	{
		// A class must be provided
		$class = $params['class'] ?? 'Registry';

// Build the object variables string
		$vars = '';

foreach (get_object_vars($object) as $k => $v)
		{
			$vars .= "\tpublic \$$k = " . $this->formatValue($v) . ";\n";
		}

$str = "<?php\n";

// If supplied, add a namespace to the class object
		if (isset($params['namespace']) && $params['namespace'] !== '')
		{
			$str .= 'namespace ' . $params['namespace'] . ";\n\n";
		}

$str .= "class $class {\n";
		$str .= $vars;
		$str .= '}';

// Use the closing tag if it not set to false in parameters.
		if (!isset($params['closingtag']) || $params['closingtag'] !== false)
		{
			$str .= "\n?>";
		}

return $str;
	}

/**
	 * Parse a PHP class formatted string and convert it into an object.
	 *
	 * @param   string  $data     PHP Class formatted string to convert.
	 * @param   array   $options  Options used by the formatter.
	 *
	 * @return  object   Data object.
	 *
	 * @since   1.0
	 */
	public function stringToObject($data, array $options = [])
	{
		return new \stdClass;
	}

/**
	 * Format a value for the string conversion
	 *
	 * @param   mixed  $value  The value to format
	 *
	 * @return  mixed  The formatted value
	 *
	 * @since   2.0.0
	 */
	protected function formatValue($value)
	{
		switch (\gettype($value))
		{
			case 'string':
				return "'" . addcslashes($value, '\\\'') . "'";

case 'array':
			case 'object':
				return $this->getArrayString((array) $value);

case 'double':
			case 'integer':
				return $value;

case 'boolean':
				return $value ? 'true' : 'false';

case 'NULL':
				return 'null';
		}
	}

/**
	 * Method to get an array as an exported string.
	 *
	 * @param   array  $a  The array to get as a string.
	 *
	 * @return  string
	 *
	 * @since   1.0
	 */
	protected function getArrayString($a)
	{
		$s = 'array(';
		$i = 0;

foreach ($a as $k => $v)
		{
			$s .= $i ? ', ' : '';
			$s .= "'" . addcslashes($k, '\\\'') . "' => ";
			$s .= $this->formatValue($v);

$i++;
		}

$s .= ')';

return $s;
	}
}