/plugins/serendipity_plugin_syndication/serendipity_plugin_syndication.php

<?php

if (IN_serendipity !== true) {
    die ("Don't hack!");
}

class serendipity_plugin_syndication extends serendipity_plugin {
    var $title = SYNDICATION;

    function introspect(&$propbag)
    {
        $propbag->add('name',          SYNDICATION);
        $propbag->add('description',   SHOWS_RSS_BLAHBLAH);
        $propbag->add('stackable',     true);
        $propbag->add('author',        'Serendipity Team');
        $propbag->add('version',       '2.3.0');
        $propbag->add('configuration', array(
                                        'title',
                                        'big_img',
                                        'feed_format',
                                        'show_comment_feed',
                                        'separator',
                                        'iconURL',
                                        'feed_name',
                                        'comment_name',
                                        'separator2',
                                        'fb_id',
                                        'custom_url'
                                       )
        );
        $propbag->add('groups',        array('FRONTEND_VIEWS'));

        $propbag->add('legal',    array(
            'services' => array(
                'feedburner.com' => array(
                    'url'  => 'https://www.feedburner.com',
                    'desc' => 'Feedburner can be used to track your feed subscription statistics. If used, a tracking pixel is loaded from FeedBurner.com servers and the IP address of the visitor will be known to the service.'
                ),
            ),
            'frontend' => array(
                'To allow easy subscription to feeds and optional tracking statistics, the legacy feedburner services can be used.',
            ),
            'backend' => array(
            ),
            'cookies' => array(
            ),
            'stores_user_input'     => false,
            'stores_ip'             => false,
            'uses_ip'               => true,
            'transmits_user_input'  => true
        ));


    }

    function introspect_config_item($name, &$propbag)
    {
        global $serendipity;

        switch($name) {
            case 'title':
                $propbag->add('type',        'string');
                $propbag->add('name',        TITLE);
                $propbag->add('description', TITLE_FOR_NUGGET);
                $propbag->add('default',     SYNDICATE_THIS_BLOG);
                break;

            case 'feed_format':
                $propbag->add('type', 'radio');
                $propbag->add('name', SYNDICATION_PLUGIN_FEEDFORMAT);
                $propbag->add('description', SYNDICATION_PLUGIN_FEEDFORMAT_DESC);
                $propbag->add('default', 'rss');
                $propbag->add('radio', array(
                    'value' => array('rss', 'atom', 'rssatom'),
                    'desc'  => array(SYNDICATION_PLUGIN_20, sprintf(SYNDICATION_PLUGIN_GENERIC_FEED, 'Atom 1.0'), SYNDICATION_PLUGIN_20 .' + '. sprintf(SYNDICATION_PLUGIN_GENERIC_FEED, 'Atom 1.0'))
                ));
                $propbag->add('radio_per_row', '3');
                break;

            case 'fb_id':
                $propbag->add('type',        'string');
                $propbag->add('name',        SYNDICATION_PLUGIN_FEEDBURNERID);
                $propbag->add('description', SYNDICATION_PLUGIN_FEEDBURNERID_DESC);
                $propbag->add('default',     '');
                break;

            case 'show_comment_feed':
                $propbag->add('type',        'boolean');
                $propbag->add('name',        SYNDICATION_PLUGIN_COMMENTFEED);
                $propbag->add('description', SYNDICATION_PLUGIN_COMMENTFEED_DESC);
                $propbag->add('default',     'false');
                break;

            case 'separator':
            case 'separator2':
                $propbag->add('type',        'separator');
                break;

            case 'iconURL':
                $propbag->add('type',        'string');
                $propbag->add('name',        XML_IMAGE_TO_DISPLAY);
                $propbag->add('description', SYNDICATION_PLUGIN_XML_DESC);
                $propbag->add('default',     'img/xml.gif');
                break;

            case 'big_img':
                $propbag->add('type',        'string');
                $propbag->add('name',        SYNDICATION_PLUGIN_FEEDICON);
                $propbag->add('description', SYNDICATION_PLUGIN_FEEDICON_DESC);
                $propbag->add('default',     'img/subtome.png');
                break;

            case 'feed_name':
                $propbag->add('type',        'string');
                $propbag->add('name',        SYNDICATION_PLUGIN_FEEDNAME);
                $propbag->add('description', SYNDICATION_PLUGIN_FEEDNAME_DESC);
                $propbag->add('default',     '');
                break;

             case 'comment_name':
                $propbag->add('type',        'string');
                $propbag->add('name',        SYNDICATION_PLUGIN_COMMENTNAME);
                $propbag->add('description', SYNDICATION_PLUGIN_COMMENTNAME_DESC);
                $propbag->add('default',     '');
                break;

            case 'custom_url':
                $propbag->add('type',        'boolean');
                $propbag->add('name',        SYNDICATION_PLUGIN_CUSTOMURL);
                $propbag->add('description', SYNDICATION_PLUGIN_CUSTOMURL_DESC);
                $propbag->add('default',     '');
                break;

            default:
                return false;
        }
        return true;
    }

    function generate_content(&$title)
    {
        global $serendipity;

        $title = $this->get_config('title');
        $iconURL = $this->get_config('iconURL', 'img/xml.gif');
        if ($iconURL != 'none') {
            $small_icon  = serendipity_getTemplateFile($iconURL);
        }
        $custom_feed = trim($this->get_config('feed_name'));
        $custom_comm = trim($this->get_config('comment_name'));
        $custom_img  = trim($this->get_config('big_img', 'img/subtome.png'));
        if ($custom_img != 'none' && $custom_img != "feedburner") {
            $custom_img = serendipity_getTemplateFile($custom_img);
        }
        $fbid        = $this->get_config('fb_id');
        $custom_url  = serendipity_db_bool($this->get_config('custom_url', false));
        $feed_format = $this->get_config('feed_format', 'rss');

        $useRss = true;
        if ($feed_format  == 'atom') {
            $useRss = false;
            $useAtom = true;
        } else if ($feed_format == 'rssatom') {
            $useAtom = true;
        }

        $img = 'http://feeds.feedburner.com/~fc/'.$this->get_config('fb_id').'?bg=99CCFF&amp;fg=444444&amp;anim=0';

        $icon = $small_icon;
        if (!empty($custom_img) && $custom_img != 'default' && $custom_img != 'none' && $custom_img != 'empty') {
            $icon = $custom_img;
            if ($fbid != "" && $custom_img == 'feedburner') {
                $icon = "http://feeds.feedburner.com/~fc/$fbid?bg=99CCFF&amp;fg=444444&amp;anim=0";
            }
            if ($fbid == "" && $custom_img == 'feedburner') {
                $icon = serendipity_getTemplateFile('img/subtome.png');
            }
        }

        if (empty($custom_feed) || $custom_feed == 'default' || $custom_feed == 'none' || $custom_feed == 'empty') {
            $FEED = 'Feed';
        } else {
            $FEED = $custom_feed;
        }

        if (empty($custom_comm) || $custom_comm == 'default' || $custom_comm == 'none' || $custom_comm == 'empty') {
            $COMMENTS = COMMENTS;
        } else {
            $COMMENTS = $custom_comm;
        }

        if ($custom_url) {
            $mainFeed = serendipity_get_config_var('feedCustom');
        } else {
            $mainFeed = serendipity_rewriteURL(PATH_FEEDS .'/index.rss2');
            if ($fbid != "") {
                $mainFeed ='http://feeds.feedburner.com/' . $fbid;
            } else {
                if ((isset($useAtom) && $useAtom) && ! $useRss) {
                    $mainFeed = serendipity_rewriteURL(PATH_FEEDS .'/atom10.xml');
                }
            }
        }

        echo "\n".'<ul id="serendipity_syndication_list" class="plainList">';
        echo $this->generateFeedButton($mainFeed, ($icon == $small_icon ?  ($useRss ? "RSS $FEED" : "Atom $FEED") : ""), $icon, $icon == $small_icon);

        if ($useRss && (isset($useAtom) && $useAtom)) {
            echo $this->generateFeedButton(serendipity_rewriteURL(PATH_FEEDS .'/atom10.xml'), "Atom $FEED", $small_icon);
        }

        if (serendipity_db_bool($this->get_config('show_2.0c', false)) || serendipity_db_bool($this->get_config('show_comment_feed', false))) {
            if ($useRss) {
                echo $this->generateFeedButton( serendipity_rewriteURL(PATH_FEEDS .'/comments.rss2'),
                                                $COMMENTS . ($useAtom ? " (RSS)": ""),
                                                $small_icon);
            }
            if ($useAtom) {
                echo $this->generateFeedButton( serendipity_rewriteURL(PATH_FEEDS .'/comments.atom10'),
                                                $COMMENTS . ($useRss ? " (Atom)": ""),
                                                $small_icon);
            }
        }
        echo "</ul>\n";
    }

    function generateFeedButton($feed, $label, $icon, $small = false)
    {
        $link = 'href="'.$feed.'" ';
        $output = '<li>';
        $class = "";
        if ($small) {
            $class .= " serendipity_xml_icon";
        }
        if ($icon) {
            $output .= '<a class="'. $class .'" ' . $link . '><img src="' . $icon . '" alt="XML" style="border: 0px" /></a>'."\n";
        }
        if (! empty($label)) {
            $output .= " <a $link>$label</a>\n";
        }
        return $output .= "</li>\n";
    }

}

?>