<?php
class FuturaSciencesBridge extends FeedExpander {

    const MAINTAINER = 'ORelio';
    const NAME = 'Futura-Sciences Bridge';
    const URI = 'http://www.futura-sciences.com/';
    const DESCRIPTION = 'Returns the newest articles.';

    const PARAMETERS = array( array(
        'feed'=> array(
            'name'=>'Feed',
            'type'=>'list',
            'values'=>array(
                'Les flux multi-magazines'=>array(
                    'Les dernières actualités de Futura-Sciences'=>'actualites',
                    'Les dernières définitions de Futura-Sciences'=>'definitions',
                    'Les dernières photos de Futura-Sciences'=>'photos',
                    'Les dernières questions - réponses de Futura-Sciences'=>'questions-reponses',
                    'Les derniers dossiers de Futura-Sciences'=>'dossiers'
                ),
                'Les flux Services'=> array(
                    'Les cartes virtuelles de Futura-Sciences'=>'services/cartes-virtuelles',
                    'Les fonds d\'écran de Futura-Sciences'=>'services/fonds-ecran'
                ),
                'Les flux Santé'=>array(
                    'Les dernières actualités de Futura-Santé'=>'sante/actualites',
                    'Les dernières définitions de Futura-Santé'=>'sante/definitions',
                    'Les dernières questions-réponses de Futura-Santé'=>'sante/question-reponses',
                    'Les derniers dossiers de Futura-Santé'=>'sante/dossiers'
                ),
                'Les flux High-Tech'=>array(
                    'Les dernières actualités de Futura-High-Tech'=>'high-tech/actualites',
                    'Les dernières astuces de Futura-High-Tech'=>'high-tech/question-reponses',
                    'Les dernières définitions de Futura-High-Tech'=>'high-tech/definitions',
                    'Les derniers dossiers de Futura-High-Tech'=>'high-tech/dossiers'
                ),
                'Les flux Espace'=>array(
                    'Les dernières actualités de Futura-Espace'=>'espace/actualites',
                    'Les dernières définitions de Futura-Espace'=>'espace/definitions',
                    'Les dernières questions-réponses de Futura-Espace'=>'espace/question-reponses',
                    'Les derniers dossiers de Futura-Espace'=>'espace/dossiers'
                ),
                'Les flux Environnement'=>array(
                    'Les dernières actualités de Futura-Environnement'=>'environnement/actualites',
                    'Les dernières définitions de Futura-Environnement'=>'environnement/definitions',
                    'Les dernières questions-réponses de Futura-Environnement'=>'environnement/question-reponses',
                    'Les derniers dossiers de Futura-Environnement'=>'environnement/dossiers'
                ),
                'Les flux Maison'=>array(
                    'Les dernières actualités de Futura-Maison'=>'maison/actualites',
                    'Les dernières astuces de Futura-Maison'=>'maison/question-reponses',
                    'Les dernières définitions de Futura-Maison'=>'maison/definitions',
                    'Les derniers dossiers de Futura-Maison'=>'maison/dossiers'
                ),
                'Les flux Nature'=>array(
                    'Les dernières actualités de Futura-Nature'=>'nature/actualites',
                    'Les dernières définitions de Futura-Nature'=>'nature/definitions',
                    'Les dernières questions-réponses de Futura-Nature'=>'nature/question-reponses',
                    'Les derniers dossiers de Futura-Nature'=>'nature/dossiers'
                ),
                'Les flux Terre'=>array(
                    'Les dernières actualités de Futura-Terre'=>'terre/actualites',
                    'Les dernières définitions de Futura-Terre'=>'terre/definitions',
                    'Les dernières questions-réponses de Futura-Terre'=>'terre/question-reponses',
                    'Les derniers dossiers de Futura-Terre'=>'terre/dossiers'
                ),
                'Les flux Matière'=>array(
                    'Les dernières actualités de Futura-Matière'=>'matiere/actualites',
                    'Les dernières définitions de Futura-Matière'=>'matiere/definitions',
                    'Les dernières questions-réponses de Futura-Matière'=>'matiere/question-reponses',
                    'Les derniers dossiers de Futura-Matière'=>'matiere/dossiers'
                ),
                'Les flux Mathématiques'=>array(
                    'Les dernières actualités de Futura-Mathématiques'=>'mathematiques/actualites',
                    'Les derniers dossiers de Futura-Mathématiques'=>'mathematiques/dossiers'
                )
            )
        )
    ));

    public function collectData(){
        $url = self::URI . 'rss/' . $this->getInput('feed') . '.xml';
        $this->collectExpandableDatas($url, 10);
    }

    protected function parseItem($newsItem){
        $item = parent::parseItem($newsItem);
        $item['uri'] = str_replace('#xtor=RSS-8', '', $item['uri']);
        $article = getSimpleHTMLDOMCached($item['uri'])
            or returnServerError('Could not request Futura-Sciences: ' . $item['uri']);
        $item['content'] = $this->ExtractArticleContent($article);
        $author = $this->ExtractAuthor($article);
        $item['author'] = empty($author) ? $item['author'] : $author;
        return $item;
    }

    private function StripWithDelimiters($string, $start, $end) {
        while (strpos($string, $start) !== false) {
            $section_to_remove = substr($string, strpos($string, $start));
            $section_to_remove = substr($section_to_remove, 0, strpos($section_to_remove, $end) + strlen($end));
            $string = str_replace($section_to_remove, '', $string);
        } return $string;
    }

    private function StripRecursiveHTMLSection($string, $tag_name, $tag_start) {
        $open_tag = '<'.$tag_name;
        $close_tag = '</'.$tag_name.'>';
        $close_tag_length = strlen($close_tag);
        if (strpos($tag_start, $open_tag) === 0) {
            while (strpos($string, $tag_start) !== false) {
                $max_recursion = 100;
                $section_to_remove = null;
                $section_start = strpos($string, $tag_start);
                $search_offset = $section_start;
                do {
                    $max_recursion--;
                    $section_end = strpos($string, $close_tag, $search_offset);
                    $search_offset = $section_end + $close_tag_length;
                    $section_to_remove = substr($string, $section_start, $section_end - $section_start + $close_tag_length);
                    $open_tag_count = substr_count($section_to_remove, $open_tag);
                    $close_tag_count = substr_count($section_to_remove, $close_tag);
                } while ($open_tag_count > $close_tag_count && $max_recursion > 0);
                $string = str_replace($section_to_remove, '', $string);
            }
        }
        return $string;
    }

    private function ExtractArticleContent($article){
        $contents = $article->find('section.article-text-classic', 0)->innertext;
        $headline = trim($article->find('p.description', 0)->plaintext);
        if (!empty($headline))
            $headline = '<p><b>'.$headline.'</b></p>';

        foreach (array(
            '<div class="clear',
            '<div class="sharebar2',
            '<div class="diaporamafullscreen"',
            '<div class="module social-button',
            '<div style="margin-bottom:10px;" class="noprint"',
            '<div class="ficheprevnext',
            '<div class="bar noprint',
            '<div class="toolbar noprint',
            '<div class="addthis_toolbox',
            '<div class="noprint',
            '<div class="bg bglight border border-full noprint',
            '<div class="httplogbar-wrapper noprint',
            '<div id="forumcomments',
            '<div ng-if="active"'
        ) as $div_start) {
            $contents = $this->StripRecursiveHTMLSection($contents , 'div', $div_start);
        }

        $contents = $this->StripWithDelimiters($contents, '<hr ', '/>');
        $contents = $this->StripWithDelimiters($contents, '<p class="content-date', '</p>');
        $contents = $this->StripWithDelimiters($contents, '<h1 class="content-title', '</h1>');
        $contents = $this->StripWithDelimiters($contents, 'fs:definition="', '"');
        $contents = $this->StripWithDelimiters($contents, 'fs:xt:clicktype="', '"');
        $contents = $this->StripWithDelimiters($contents, 'fs:xt:clickname="', '"');
        $contents = $this->StripWithDelimiters($contents, '<script ', '</script>');

        return $headline.trim($contents);
    }

    // Extracts the author from an article or element
    private function ExtractAuthor($article){
        $article_author = $article->find('h3.epsilon', 0);
        if($article_author){
            return trim(str_replace(', Futura-Sciences', '', $article_author->plaintext));
        }
        return '';
    }
}