<?php

/**
 * Class that makes it possible to use ArlimaAbstractListTemplateRenderer on ordinary
 * wordpress loops (while have_posts() => the_post() ...)
 *
 * @package Arlima
 * @since 2.0
 */
class Arlima_WPLoop extends Arlima_ListTemplateRenderer
{

    /**
     * @var string
     */
    private $filter_suffix;

    /**
     * @var int
     */
    private $list_width;

    /**
     * @var callable
     */
    private $header_callback = 'Arlima_WPLoop::defaultHeaderCallback';

    /**
     * @param string $template_path - Optional path to directory where templates should exists (see readme.txt about how to add your own template paths from the theme)
     * @param null|string $template - Optional name of template file to be used (no extension)
     * @param int $list_width
     * @param string $filter_suffix
     */
    function __construct($template_path = null, $template = Arlima_TemplatePathResolver::DEFAULT_TMPL, $list_width=468, $filter_suffix='')
    {
        $list = new Arlima_List();
        $list->setOption('template', $template);
        $this->list_width = $list_width;
        $this->filter_suffix = $filter_suffix;
        parent::__construct($list, $template_path);
    }

    /**
     * @param int $article_counter
     * @param array $article
     * @param stdClass $post
     * @param Arlima_List $list
     * @return mixed
     */
    public static function defaultHeaderCallback($article_counter, $article, $post, $list) {
        return $article['html_title'];
    }

    /**
     * @param Closure $callback
     */
    function setHeaderCallback($callback)
    {
        $this->header_callback = $callback;
    }

    /**
     * @return bool
     */
    function havePosts()
    {
        return have_posts();
    }

    /**
     * @param bool $output
     * @return string
     */
    function renderList($output = true)
    {
        $article_counter = 0;
        $content = '';

        // Create template
        $jQueryTmpl_df = new jQueryTmpl_Data_Factory();
        $this->jQueryTmpl_default = $this->loadjQueryTmpl(
            $this->list->getOption('template'),
            new jQueryTmpl_Factory(),
            new jQueryTmpl_Markup_Factory()
        );

        // Setup tmpl object creatorv
        $this->setup_wp_post_data = false; // prevent this class from overwriting the global post object

        $this->setupObjectCreator();

        if( !empty($this->filter_suffix) ) {
            Arlima_FilterApplier::setFilterSuffix($this->filter_suffix);
        }

        Arlima_FilterApplier::setArticleWidth($this->list_width);
        Arlima_FilterApplier::applyFilters($this);

        while (have_posts()) {
            if ( $this->getOffset() > $article_counter ) {
                $article_counter++;
                continue;
            }

            the_post();
            global $post;

            $article_data = $this->extractArticleData($post, $article_counter);
            list($article_counter, $article_content) = $this->outputArticle(
                $article_data,
                $jQueryTmpl_df,
                $article_counter
            );

            if ( $output ) {
                echo $article_content;

            } else {
                $content .= $article_content;
            }

            if ( $article_counter >= 50 || ($this->getLimit() > -1 && $this->getLimit() <= $article_counter) ) {
                break;
            }
        }

        // Reset
        $GLOBALS['post'] = null;
        Arlima_FilterApplier::setFilterSuffix('');

        return $content;
    }

    /**
     * @param WP_Post $post
     * @return array
     */
    protected function extractArticleData($post, $article_counter)
    {
        $date = strtotime($post->post_date_gmt);
        $article = array(
            'post_id' => $post->ID,
            'options' => array(
                'hiderelated' => false
            ),
            'title' => get_the_title($post->ID),
            'html_title' => '<h2>' . $post->post_title . '</h2>',
            'url' => get_permalink($post->ID),
            'text' => '',
            'created' => $date,
            'publish_date' => $date
        );

        $article = Arlima_ListFactory::createArticleDataArray($article);
        $article['title_html'] = call_user_func($this->header_callback, $article_counter, $article, $post, $this->list);
        $article['text'] = apply_filters('the_content', get_the_content());

        return $article;
    }
}