<?php

class Mapper_BlogPost extends Fiktiv_Model_Mapper_DbTableAbstract
{

    protected $_mapperUser = null;

    public static function generatePermalink(BlogPost $post)
    {
        $chars = array(
            ' ' => '-',
        );

        $permalink = $post->getTitle();

        foreach ($chars as $ch => $rep) {
            $permalink = str_replace($ch, $rep, $permalink);
        }

        return strtolower($permalink);
    }

    public function  __construct($dbtable = null) {
        parent::__construct($dbtable);

        $this->_mapperUser = new Mapper_User(new Table_User());
    }

    protected function _createBlogPost($obj)
    {

        if ($obj instanceof Zend_Db_Table_Row)
            $obj = $obj->toArray();
        

        if ($obj instanceof stdClass)
            $obj = (array) $obj;


        if (is_array($obj)) {
            
            if (isset($obj['userId'])) {
                $obj['author'] = Fiktiv_Data_Service::getInstance()->User->findById($obj['userId']);
                unset($obj['userId']);
            }

            $blogPost = new BlogPost($obj);

        } else {
            $blogPost = null;
        }

        return $blogPost;
    }


    public function findById($id)
    {
        if (is_numeric($id)) {
            return $this->_createBlogPost($this->_dbTable->find($id)->current());
        }

        return null;
    }

    public function findAllPostByAuthor($user)
    {
        if ($user instanceof  User) {
            return $this->_createBlogPost($this->_dbTable->findByUser($user->getId()));
        }
    }

    public function findAll($limit = null)
    {

        if (!is_numeric($limit))
            throw new Fiktiv_Exception('limit must be numeric');

        $rows = $this->_dbTable->fetchAll(null, 'pubDate DESC', $limit);

        $posts = array();
        
        foreach ($rows as $row) {
            $posts[] = $this->_createBlogPost($row);
        }

        return $posts;
    }

    public function save(BlogPost $post)
    {
        $data = $post->toArray();
        unset($data['id']);

        return $this->_dbTable->update(
                $data,
                $this->_dbTable->getAdapter()->quoteInto('id = ?',$post->getId())
        );
    }
}