<?php
/**
 * Article domain model
 */
class Blog_Model_Article extends App_Model_ModelAbstract
{
    /**
     * @see App_Model_ModelAbstract::$_fields
     * @var array
     */
    protected $_fields = array(
        'id',
        'title',
        'content',
        'slug',
        'datetime',
        'comments',
        'tags',
        'permanentUrl',
        'absolutePermanentUrl'
    );

    /**
     * Set the title
     *
     * @param  string $title
     * @return void
     */
    protected function _setTitle($title)
    {
        $this->_values['title'] = $title;
        $this->_setSlug($title);
    }
       
    /**
     * Set the slug, will automatically be normalized
     *
     * @param  string $slug
     * @return void
     */
    protected function _setSlug($slug)
    {
        $slug = iconv('utf-8', 'ascii//translit', $slug);
        $slug = strtolower($slug);
        $slug = preg_replace('#[^a-z0-9\-_]#', '-', $slug);
        $slug = preg_replace('#-{2,}#', '-', $slug);
        
        $this->_values['slug'] = $slug;
    }
    
    /**
     * Get the perment URL
     *
     * @return string
     */
    protected function _getPermanentUrl()
    {
        if (!isset($this->_values['permanentUrl'])) {
            $urlHelper = new Zend_View_Helper_Url();
    
            $this->_values['permanentUrl'] = $urlHelper->url(array(
                'year'  => $this->datetime->get('yyyy'),
                'month' => $this->datetime->get('MM'),
                'day'   => $this->datetime->get('dd'),
                'slug'  => $this->slug
            ), 'blog-article');
        }

        return $this->_values['permanentUrl'];
    }

    /**
     * Get the absolute permanent URL
     *
     * @return string
     */
    protected function _getAbsolutePermanentUrl()
    {
        $front   = Zend_Controller_Front::getInstance();
        $request = $front->getRequest();
        $baseUri = $request->getScheme() . '://'
                 . $request->getHttpHost();

        return $baseUri . $this->permanentUrl;
    }
}