<?php

/**
 * Class with all the knowledge about how to convert a typical arlima
 * article array to a jquery tmpl array (the object which is available in the jquery templates)
 */
class Arlima_TmplDataObjectCreator {

    /**
     * @var Closure
     */
    private $text_callback;

    /**
     * @var Closure
     */
    private $get_article_image_callback;

    /**
     * @var Closure
     */
    private $related_callback;

    /**
     * @var Closure
     */
    private $article_end_callback;

    /**
     * @var string
     */
    private $before_title_html = '<h2>';

    /**
     * @var string
     */
    private $after_title_html = '</h2>';

    /**
     * @var bool
     */
    private $add_title_font_size = true;


    /**
     * Returns an empty jquery tmpl data object
     * @return array
     */
    private function getEmptyObjectArray() {
        return array(
            'container' => array(
                'id' =>  '',
                'class' => 'teaser'
            ),
            'article' => array(
                'title' => '',
                'url' => '',
                'html_title' => '',
                'html_text' => false
            ),
            'sub_articles' => false,
            'streamer' => array(),
            'related' => false,
            'before_related' => false,
            'article_end' => false,
            'image' => false
        );
    }

    /**
     * @param array $article
     * @return string
     */
    private function getTitleHtml( $article ) {

        if( $article[ 'title' ] == '' )
            return '';

        $title = str_replace( '__', '<br />', $article[ 'title' ]);

        if( !empty($article[ 'options' ][ 'pre_title' ]) )
            $title = '<span class="arlima-pre-title">' . $article[ 'options' ][ 'pre_title' ] . '</span> ' . $title;

        $title_html = '';

        $header_classes = array();

        if( $this->add_title_font_size )
            $header_classes[] = ' fsize-'.  $article[ 'title_fontsize' ];
        if( !empty($article['options']['header_class']) )
            $header_classes[] = $article['options']['header_class'];

        $start_tag = $this->before_title_html;
        if( !empty($header_classes) ) {
            if( stristr( $start_tag, 'class' ) !== false )
                $start_tag = str_replace( 'class="', 'class="arlima-title ' . implode(' ', $header_classes)  . ' ' , $start_tag);
            else
                $start_tag = str_replace( '>', ' class="arlima-title ' . implode(' ', $header_classes) . '">' , $start_tag);
        }

        if( ! empty( $article[ 'url' ] ) )
            $title_html .= '<a href="' . $article[ 'url' ] .'">' . $title . '</a>';
        else
            $title_html .= '<span>' . $title .'</span>';

        return $start_tag . $title_html . $this->after_title_html;
    }

    /**
     * @param $article
     * @param $display_streamer
     * @param $is_empty
     * @param $is_post
     * @param $post
     * @param $article_counter
     * @param null $img_size
     * @param bool $load_related_articles
     * @return array
     */
    public function create($article, $display_streamer, $is_empty, $is_post, $post, $article_counter, $img_size=null, $load_related_articles = true) {
        $data = $this->getEmptyObjectArray();
        $has_streamer = $display_streamer && isset( $article[ 'options' ][ 'streamer' ] );
        $img_opt_size = isset($article['image_options']) && !empty($article['image_options']['size']) ? $article['image_options']['size'] : false;

        $url = isset($article['url']) ? $article['url']:'';
        $post_id = !empty( $article['post_id'] ) ? $article['post_id']:'';

        $data['container']['id']    = 'teaser-'.(is_numeric($post_id) ? $post_id: $url);
        $data['container']['class'] = 'teaser'.($is_empty ? ' empty':'');
        $data['article']['title']   = isset($article['title']) ? $article['title']:'';
        $data['article']['html_title'] = $is_empty ? '':$this->getTitleHtml($article);
        $data['article']['url']     = $url;

        if( !$is_empty ) {

            // Text content
            $text_modifier = $this->text_callback;
            $data['article']['html_text'] = $text_modifier($article, $is_post, $post, $article_counter);

            $this->generateStreamerData($has_streamer, $data, $article);
            $this->generateImageData($article, $img_size, $article_counter, $data, $img_opt_size);

            // Related posts
            if($load_related_articles) {
                if(empty( $article[ 'options' ][ 'hiderelated' ] ) ) {
                    $get_related = $this->related_callback;
                    $data['related'] = $get_related($article, $is_post);
                }
            }
        }

        // Add article end content
        if( is_callable($this->article_end_callback) ) {
            $article_end = $this->article_end_callback;
            $data['article_end'] = $article_end($post, $article, $article_counter);
        }

        return $data;
    }

    /**
     * @param $article
     * @param $img_size
     * @param $article_counter
     * @param $data
     * @param $img_opt_size
     */
    protected function generateImageData($article, $img_size, $article_counter, &$data, $img_opt_size)  {
        $get_img = $this->get_article_image_callback;
        $img = $get_img($article, $img_size, $article_counter);
        if ($img) {
            $data['image'] = array(
                'html' => $img,
                'src' => false // src is actually only used by javascript in wp-admin
            );
            $data['container']['class'] .= $img_opt_size ? ' img-' . $img_opt_size : ' has-img';
        }
        else {
            $data['container']['class'] .= ' no-img';
        }
    }

    /**
     * @param $has_streamer
     * @param &$data
     * @param $article
     */
    protected function generateStreamerData($has_streamer, &$data, $article) {
        $data['container']['class'] .= ($has_streamer ? '' : ' no-streamer');
        if ($has_streamer) {
            $data['streamer']['type'] = $article['options']['streamer_type'];
            switch ($data['streamer']['type']) {
                case 'text' :
                    $data['streamer']['content'] = $article['options']['streamer_content'];
                    break;
                case 'image' :
                    $data['streamer']['content'] = '<img src="' . $article['options']['streamer_image'] . '" alt="Streamer" />';
                    break;
                default :
                    $data['streamer']['content'] = 'EXTRA';
            }

            $data['streamer']['style'] = !empty($article['options']['streamer_color']) && $data['streamer']['type'] == 'text' ? 'background: #' . $article['options']['streamer_color'] : '';
        }
    }

    /**
     * @param boolean $add_title_font_size
     */
    public function setAddTitleFontSize($add_title_font_size) {
        $this->add_title_font_size = $add_title_font_size;
    }

    /**
     * @param string $after_title_html
     */
    public function setAfterTitleHtml($after_title_html) {
        $this->after_title_html = $after_title_html;
    }

    /**
     * @param Closure $article_end_callback
     */
    public function setArticleEndCallback($article_end_callback) {
        $this->article_end_callback = $article_end_callback;
    }

    /**
     * @param string $before_title_html
     */
    public function setBeforeTitleHtml($before_title_html) {
        $this->before_title_html = $before_title_html;
    }

    /**
     * @param Closure $get_article_image_callback
     */
    public function setGetArticleImageCallback($get_article_image_callback) {
        $this->get_article_image_callback = $get_article_image_callback;
    }

    /**
     * @param Closure $related_callback
     */
    public function setRelatedCallback($related_callback) {
        $this->related_callback = $related_callback;
    }

    /**
     * @param Closure $text_callback
     */
    public function setTextCallback($text_callback) {
        $this->text_callback = $text_callback;
    }
}