<?php

namespace ByJG\Serializer;

use Symfony\Component\Yaml\Yaml;
use stdClass;

class SerializerObject
{
	protected $_model = null;
	protected $_methodPattern = ['/([^A-Za-z0-9])/', ''];
	protected $_methodGetPrefix = 'get';
	protected $_stopAtFirstLevel = false;
	protected $_onlyString = false;
	protected $_currentLevel = 0;
	protected $_doNotParse = [];
	protected $_serializeNull = true;
	protected $_sourceType = "OBJECT";


	public function __construct($model)
	{
		$this->_model = $model;
	}


	public static function instance($model)
	{
		return new SerializerObject($model);
	}


	public function fromYaml()
	{
		$this->_sourceType = "YAML";
		return $this;
	}


	public function fromJson()
	{
		$this->_sourceType = "JSON";
		return $this;
	}


	/**
	 * Build the array based on the object properties
	 *
	 * @return array
	 */
	public function serialize()
	{
		if ($this->_sourceType == "YAML") {
		    return Yaml::parse($this->_model);
		} elseif ($this->_sourceType == "JSON") {
		    return json_decode($this->_model, true);
		}

		$this->_currentLevel = 1;
		return $this->serializeProperties($this->_model);
	}


	protected function serializeProperties($property)
	{
		if ($this->isStoppingAtFirstLevel() && $this->_currentLevel > 1) {
		    return $property;
		}

		if (is_array($property)) {
		    return $this->serializeArray($property);
		}

		if ($property instanceof stdClass) {
		    return $this->serializeStdClass($property);
		}

		if (is_object($property)) {
		    return $this->serializeObject($property);
		}

		if ($this->isOnlyString()) {
		    $property = "$property";
		}
		return $property;
	}


	/**
	 * @return bool
	 */
	public function isStoppingAtFirstLevel()
	{
		return $this->_stopAtFirstLevel;
	}


	/**
	 * @param bool $stopAtFirstLevel
	 */
	public function withStopAtFirstLevel()
	{
		$this->_stopAtFirstLevel = true;
		return $this;
	}


	/**
	 * @param array $array
	 * @return array
	 */
	protected function serializeArray(array $array)
	{
		$result = [];
		$this->_currentLevel++;

		foreach ($array as $key => $value) {
		    $result[$key] = $this->serializeProperties($value);

		    if ($result[$key] === null && !$this->isSerializingNull()) {
		        unset($result[$key]);
		    }
		}

		return $result;
	}


	/**
	 * @param stdClass $stdClass
	 * @return array
	 */
	protected function serializeStdClass(stdClass $stdClass)
	{
		return $this->serializeArray((array)$stdClass);
	}


	/**
	 * @param stdClass|object $object
	 * @return array|object
	 */
	protected function serializeObject($object)
	{
		foreach ((array)$this->_doNotParse as $class) {
		    if (is_a($object, $class)) {
		        return $object;
		    }
		}

		// Start Serialize object
		$result = [];
		$this->_currentLevel++;

		foreach ((array)$object as $key => $value) {
		    $propertyName = $key;
		    if ($key[0] == "\0") {
		        // validate protected;
		        $keyName = substr($key, strrpos($key, "\0"));
		        $propertyName = preg_replace($this->getMethodPattern(0), $this->getMethodPattern(1), $keyName);

		        if (!method_exists($object, $this->getMethodGetPrefix() . $propertyName)) {
		            continue;
		        }
		        $value = $object->{$this->getMethodGetPrefix() . $propertyName}();
		    }

		    $result[$propertyName] = $this->serializeProperties($value);

		    if ($result[$propertyName] === null && !$this->isSerializingNull()) {
		        unset($result[$propertyName]);
		    }
		}

		return $result;
	}


	/**
	 * @param $key
	 * @return array
	 */
	public function getMethodPattern($key)
	{
		return $this->_methodPattern[$key];
	}


	/**
	 * @param $search
	 * @param $replace
	 */
	public function withMethodPattern($search, $replace)
	{
		$this->_methodPattern = [$search, $replace];
		return $this;
	}


	/**
	 * @return string
	 */
	public function getMethodGetPrefix()
	{
		return $this->_methodGetPrefix;
	}


	/**
	 * @param string $methodGetPrefix
	 */
	public function withMethodGetPrefix($methodGetPrefix)
	{
		$this->_methodGetPrefix = $methodGetPrefix;
		return $this;
	}


	/**
	 * @return boolean
	 */
	public function isOnlyString()
	{
		return $this->_onlyString;
	}


	/**
	 * @param boolean $onlyString
	 * @return $this
	 */
	public function withOnlyString($value = true)
	{
		$this->_onlyString = $value;
		return $this;
	}


	/**
	 * @return array
	 */
	public function getDoNotParse()
	{
		return $this->_doNotParse;
	}


	/**
	 * @param array $doNotParse
	 * @return $this
	 */
	public function withDoNotParse(array $doNotParse)
	{
		$this->_doNotParse = $doNotParse;
		return $this;
	}


	/**
	 * @return bool
	 */
	public function isSerializingNull()
	{
		return $this->_serializeNull;
	}


	/**
	 * @param bool $buildNull
	 * @return $this
	 */
	public function withDoNotSerializeNull()
	{
		$this->_serializeNull = false;
		return $this;
	}
}
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