<?php

namespace lib\Core;

abstract class Entity
{
    private $_origins = [];
    private $_values = [];
    private $_isChanged = false;
    private $_changedFields = [];

    protected function __construct() {} //

    final public function __get($key)
    {
        return $this->_values[$key];
    }
    final public function __set($key, $value)
    {
        if (array_key_exists($key, $this->_values)) {
            // echo "{$this->_values[$key]} !== {$value}";
            if ($this->_values[$key] !== $value) {
                $this->_isChanged    = true;
                $this->_changedFields[] = $key;
                $this->_origins[$key] = $this->_values[$key];
                $this->_values[$key] = $value;
            }
        } else {
            $this->_isChanged    = true;
            $this->_changedFields[] = $key;
            $this->_origins = $this->_values;
            $this->_values[$key] = $value;
        }
    }

    final public function isChanged()
    {
        return $this->_isChanged;
    }
    final public function clearChangedFields()
    {
        $this->_isChanged = false;
        $this->_changedFields = $this->_values;
    }
    final public function getChangedFields(): array
    {
        return $this->_changedFields;
    }
    final public function getOrigins(): array
    {
        return $this->_origins;
    }
} //Class