fiktivkod/application/models/BlogPost.php

<?php

class BlogPost extends Fiktiv_Model_Abstract
{
    protected $_data = array();

    protected $_default = array(
        'id'            => 0,
        'title'         => null,
        'content'       => null,
        'pubDate'       => null,
        'author'        => null,
        'permalink'     => null,
        'isPublished'   => false,
        'tags'          => array(),
    );

    public function setAttribs(array $data) {

        foreach ($data as $key => $value) {

            switch(strtolower($key)) {
                case 'title':
                    $this->setTitle($value);
                    break;
                case 'content':
                    $this->setContent($value);
                    break;
                case 'author':
                    $this->setAuthor($value);
                    break;
                case 'pubdate':
                    $this->setPubDate(new Zend_Date($value));
                    break;
                case 'tags':
                    $this->setTags($value);
                    break;
                case 'permalink':
                    $this->setPermalink($value);
                    break;
            }
        }
    }

    public function setId($id)
    {
        if (is_numeric($id))
            $this->_data['id'] = $id;
    }

    public function setTitle($title)
    {
        if (is_string($title) && !isset($title[30])) {

            $this->_data['title'] = $title;
            $this->generatePermalink();
            return true;
        }

        return false;
    }

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

            $this->_data['content'] = $content;
            return true;
        }
        
        return false;
    }

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

            $this->_data['author'] = $author;
            return true;
        }

        return false;
    }

    public function addTag($tag)
    {
        if (is_string($tag)) {
            $this->_data['tags'][] = $tag;
            return true;
        }
        
        return false;
    }

    public function setTags(array $tags)
    {
        // make sure the all elements are strings
        foreach ($tags as $key => $tag) {

            if (!is_string($tag)) {
                return false;
            }
        }

        $this->_data['tags'] = $tags;
        return true;
    }

    public function setPubDate($date)
    {
       
        if (Fiktiv_Date::isDate($date)) {

            $this->_data['pubDate'] = new Fiktiv_Date($date);
            
        } else if ($date instanceof Zend_Date) {

            $this->_data['pubDate'] = $date;
            
        } else {

            return false;
        }

        return true;
    }

    public function isPublished($flag = null)
    {
        if (null === $flag) {
            return $this->_data['isPublished'];
        }

        $this->_data['isPublished'] = (boolean)$flag;
    }

    public function setPermalink($permalink)
    {
        if (is_string($permalink)) {
            $this->_data['permalink'] = $permalink;
            return true;
        }
        
        return false;
    }

    protected function generatePermalink()
    {
        $permalink = $this->_data['title'];

        // All to lowercase
        $permalink = strtolower($permalink);

        // Remove special characters
        $permalink = filter_var($permalink, FILTER_SANITIZE_SPECIAL_CHARS);
        
        // Replace stuff
        $replace = array(
            ' ' => '-',
            'å' => 'a',
            'ä' => 'a',
            'ö' => 'o',
            '_' => '-',
            '!' => '',
            '?' => '',
            '.' => '',
            ',' => '',
        );
        foreach($replace as $char => $value) {
            $permalink = str_replace($char,$value,$permalink);
        }

        $this->_data['permalink'] = $permalink;
    }
}