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<?php
defined('_VALID') or die('Restricted Access!');
class VComponent_link_add
{
    public function __construct()
    {
    }
    
    public function render()
    {
        if (!VUri::match('link/add/')) {
            VModule::load('404', TRUE);
        }
    
        VLanguage::load('frontend.link');
    
        $lcfg        = VF::cfg('module.link');
        $errors        = array();
        $messages    = array();
        $link       = array(
            'title' => '', 'description' => '', 'url' => '',
            'name' => '', 'email' => '', 'linkback' => ''
        );
        
        if ($lcfg['add_page'] == '0') {
            $errors[]    = 'Link exchange not enabled!';
        }
        
        if (isset($_POST['submit-link']) && !$errors) {
            $filter            = VF::factory('filter');
            $title            = $filter->get('title');
            $description    = $filter->get('description');
            $url            = $filter->get('url');
            $name            = $filter->get('name');
            $email            = $filter->get('email');
            $linkback        = $filter->get('linkback');
            
            if ($title == '') {
                $errors[] = __('title-empty');
            } else {
                $link['title']    = $title;
            }
            
            if ($description != '') {
                $link['description'] = $description;
            }
            
            if ($url == '') {
                $errors[] = __('url-empty');
            } elseif (!VValid::url($url)) {
                $errors[] = __('url-invalid');
            } else {
                $link['url'] = $url;
            }
            
            if ($name == '') {
                $errors[]    = __('name-empty');
            } else {
                $link['name']    = $name;
            }
            
            if ($email == '') {
                $errors[]    = __('email-empty');
            } elseif (!VValid::email($email)) {
                $errors[]    = __('email-invalid');
            } else {
                $link['email'] = $email;
            }
            
            if ($linkback == '') {
                $errors[]     = __('linkback-empty');
            } elseif (!VValid::url($linkback)) {
                $errors[]    = __('linkback-invalid');
            } else {
                $link['linkback'] = $linkback;
            }
            
            $code = $filter->get('code');
            if (strtoupper($code) != $_SESSION['captcha_code']) {
                  $errors[] = __('captcha-invalid');
            }
            
            $pagerank    = VPagerank::get($linkback);
            if ($lcfg['pagerank_min'] !== 0) {
                  if ((int) $pagerank < $lcfg['pagerank_min']) {
                      $errors[] = __('pagerank-invalid', array($lcfg['pagerank']));
                  }
            }
            
            if ($lcfg['backlink_check'] === 1 && $linkback && 
                !$this->check_backlink($linkback)) {
                $errors[] = __('linkback-missing');
            }
            
            if (!$errors) {
                $linkback     = str_replace(array('http://', 'www.'), '', $linkback);
            
                $db = VF::factory('database');
                $db->query("INSERT INTO #__link
                            SET title = '".$db->escape($title)."',
                                description = '".$db->escape($description)."',
                                url = '".$db->escape($url)."',
                                name = '".$db->escape($name)."',
                                email = '".$db->escape($email)."',
                                linkback = '".$db->escape($linkback)."',
                                pagerank = ".$pagerank.",
                                widget = 'footer',
                                status = '0'");
                if ($db->affected_rows()) {
                    $messages[] = __('link-success');
                } else {
                    throw new VException('Application Error! Aborting...');
                }
            }
        }
        
        $tpl = VF::factory('template');
        $tpl->menu            = 'home';
        $tpl->meta_title    = __('link-meta-title');
        $tpl->submenu        = '';
        $tpl->errors        = $errors;
        $tpl->messages        = $messages;
        $tpl->lcfg            = $lcfg;
        $tpl->link            = $link;
        $tpl->load(array('header', 'link_add', 'footer'));
        $tpl->display();
    }
    
    private function check_backlink($url)
    {
        VF::load('simple_html_dom.simple_html_dom');
        $html    = VCurl::string($url);
        $html    = str_get_html($html);
        foreach ($html->find('a') as $element) {
            if ($element->href = BASE_URL) {
                return TRUE;
            }
        }
        
        return FALSE;
    }
}