<?php

class BlogPost
{

    protected $_title;
    protected $_content;
    protected $_author;
    protected $_pubDate;
    protected $_isPublished = false;
    

    public function setTitle($title)
    {
        if (is_string($title) && null == $title[30]) {

            $this->_title = $title;
            return true;
        }

        return false;
    }


    public function setContent($content)
    {
        if (is_string($content)) {

            $this->_content = $content;
            return true;
        }
        
        return false;
    }


    public function setAuthor($author)
    {
        if ($author instanceof  User) {

            $this->_author = $author;
            return true;
        }

        return false;
    }


    public function setPubDate($date)
    {
        if (is_string($date) && preg_match('/^(?:(?:19[0-9]{2})|(?:20[0-9]{2}))\-' .
            '(?:(?:0[1-9])|(?:1[012]))\-(?:(?:0[1-9])|(?:[12][0-9])|(?:3[01]))$/', $date)) {

            $this->_pubDate = $date;
        } else if ($date instanceof Zend_Date) {

            $this->_pubDate = $date->toString('yyyy-MM-dd');
        } else {

            return false;
        }

        return true;
    }


    public function isPublished($flag = null)
    {
        if (null === $flag) {
            return $this->_isPublished;
        }

        $this->_isPublished = (boolean)$flag;
    }

    public function  __call($name,$args) {

        // getX methods
        if ('get' == substr($name,0,3)) {
            $dataPart = '_'.lcfirst(substr($name,3));
            if (isset($this->$dataPart))
                return $this->$dataPart;
        }

    }
}