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<?php

/**

* @package phpBB3

* @version $Id$

* @copyright (c) 2009 phpBB Group

* @license http://opensource.org/licenses/gpl-license.php GNU Public License

*

* Idea and original RSS Feed 2.0 MOD (Version 1.0.8/9) by leviatan21

* Original MOD: http://www.phpbb.com/community/viewtopic.php?f=69&t=1214645

* MOD Author Profile: http://www.phpbb.com/community/memberlist.php?mode=viewprofile&u=345763

* MOD Author Homepage: http://www.mssti.com/phpbb3/

*

**/

/**

* @ignore

**/

define('IN_PHPBB', true);

$phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';

$phpEx = substr(strrchr(__FILE__, '.'), 1);

include($phpbb_root_path . 'common.' . $phpEx);

if (!$config['feed_enable'])

{

        trigger_error('NO_FEED_ENABLED');

}

// Start session

$user->session_begin();

if (!empty($config['feed_http_auth']) && request_var('auth', '') == 'http')

{

        phpbb_http_login(array(

                'auth_message'        => 'Feed',

                'viewonline'        => request_var('viewonline', true),

        ));

}

$auth->acl($user->data);

$user->setup();

// Initial var setup

$forum_id        = request_var('f', 0);

$topic_id        = request_var('t', 0);

$mode                = request_var('mode', '');

// We do not use a template, therefore we simply define the global template variables here

$global_vars = $item_vars = array();

$feed_updated_time = 0;

// Generate params array for use in append_sid() to correctly link back to this page

$params = false;

if ($forum_id || $topic_id || $mode)

{

        $params = array(

                'f'                => ($forum_id) ? $forum_id : NULL,

                't'                => ($topic_id) ? $topic_id : NULL,

                'mode'        => ($mode) ? $mode : NULL,

        );

}

// This boards URL

$board_url = generate_board_url();

// Get correct feed object

$feed = phpbb_feed_factory::init($mode, $forum_id, $topic_id);

// No feed found

if ($feed === false)

{

        trigger_error('NO_FEED');

}

// Open Feed

$feed->open();

// Iterate through items

while ($row = $feed->get_item())

{

        // BBCode options to correctly disable urls, smilies, bbcode...

        if ($feed->get('options') === NULL)

        {

                // Allow all combinations

                $options = 7;

                if ($feed->get('enable_bbcode') !== NULL && $feed->get('enable_smilies') !== NULL && $feed->get('enable_magic_url') !== NULL)

                {

                        $options = (($row[$feed->get('enable_bbcode')]) ? OPTION_FLAG_BBCODE : 0) + (($row[$feed->get('enable_smilies')]) ? OPTION_FLAG_SMILIES : 0) + (($row[$feed->get('enable_magic_url')]) ? OPTION_FLAG_LINKS : 0);

                }

        }

        else

        {

                $options = $row[$feed->get('options')];

        }

        $title = (isset($row[$feed->get('title')]) && $row[$feed->get('title')] !== '') ? $row[$feed->get('title')] : ((isset($row[$feed->get('title2')])) ? $row[$feed->get('title2')] : '');

        $published = ($feed->get('published') !== NULL) ? (int) $row[$feed->get('published')] : 0;

        $updated = ($feed->get('updated') !== NULL) ? (int) $row[$feed->get('updated')] : 0;

        $item_row = array(

                'author'                => ($feed->get('creator') !== NULL) ? $row[$feed->get('creator')] : '',

                'published'                => ($published > 0) ? feed_format_date($published) : '',

                'updated'                => ($updated > 0) ? feed_format_date($updated) : '',

                'link'                        => '',

                'title'                        => censor_text($title),

                'category'                => ($config['feed_item_statistics'] && !empty($row['forum_id'])) ? $board_url . '/viewforum.' . $phpEx . '?f=' . $row['forum_id'] : '',

                'category_name'        => ($config['feed_item_statistics'] && isset($row['forum_name'])) ? $row['forum_name'] : '',

                'description'        => censor_text(feed_generate_content($row[$feed->get('text')], $row[$feed->get('bbcode_uid')], $row[$feed->get('bitfield')], $options)),

                'statistics'        => '',

        );

        // Adjust items, fill link, etc.

        $feed->adjust_item($item_row, $row);

        $item_vars[] = $item_row;

        $feed_updated_time = max($feed_updated_time, $published, $updated);

}

// If we do not have any items at all, sending the current time is better than sending no time.

if (!$feed_updated_time)

{

        $feed_updated_time = time();

}

// Some default assignments

// FEED_IMAGE is not used (atom)

$global_vars = array_merge($global_vars, array(

        'FEED_IMAGE'                        => ($user->img('site_logo', '', false, '', 'src')) ? $board_url . '/' . substr($user->img('site_logo', '', false, '', 'src'), strlen($phpbb_root_path)) : '',

        'SELF_LINK'                                => feed_append_sid('/feed.' . $phpEx, $params),

        'FEED_LINK'                                => $board_url . '/index.' . $phpEx,

        'FEED_TITLE'                        => $config['sitename'],

        'FEED_SUBTITLE'                        => $config['site_desc'],

        'FEED_UPDATED'                        => feed_format_date($feed_updated_time),

        'FEED_LANG'                                => $user->lang['USER_LANG'],

        'FEED_AUTHOR'                        => $config['sitename'],

));

$feed->close();

// Output page

// gzip_compression

if ($config['gzip_compress'])

{

        if (@extension_loaded('zlib') && !headers_sent())

        {

                ob_start('ob_gzhandler');

        }

}

// IF debug extra is enabled and admin want to "explain" the page we need to set other headers...

if (defined('DEBUG_EXTRA') && request_var('explain', 0) && $auth->acl_get('a_'))

{

        header('Content-type: text/html; charset=UTF-8');

        header('Cache-Control: private, no-cache="set-cookie"');

        header('Expires: 0');

        header('Pragma: no-cache');

        $mtime = explode(' ', microtime());

        $totaltime = $mtime[0] + $mtime[1] - $starttime;

        if (method_exists($db, 'sql_report'))

        {

                $db->sql_report('display');

        }

        garbage_collection();

        exit_handler();

}

header("Content-Type: application/atom+xml; charset=UTF-8");

header("Last-Modified: " . gmdate('D, d M Y H:i:s', $feed_updated_time) . ' GMT');

if (!empty($user->data['is_bot']))

{

        // Let reverse proxies know we detected a bot.

        header('X-PHPBB-IS-BOT: yes');

}

echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";

echo '<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="' . $global_vars['FEED_LANG'] . '">' . "\n";

echo '<link rel="self" type="application/atom+xml" href="' . $global_vars['SELF_LINK'] . '" />' . "\n\n";

echo (!empty($global_vars['FEED_TITLE'])) ? '<title>' . $global_vars['FEED_TITLE'] . '</title>' . "\n" : '';

echo (!empty($global_vars['FEED_SUBTITLE'])) ? '<subtitle>' . $global_vars['FEED_SUBTITLE'] . '</subtitle>' . "\n" : '';

echo (!empty($global_vars['FEED_LINK'])) ? '<link href="' . $global_vars['FEED_LINK'] .'" />' . "\n" : '';

echo '<updated>' . $global_vars['FEED_UPDATED'] . '</updated>' . "\n\n";

echo '<author><name><![CDATA[' . $global_vars['FEED_AUTHOR'] . ']]></name></author>' . "\n";

echo '<id>' . $global_vars['SELF_LINK'] . '</id>' . "\n";

foreach ($item_vars as $row)

{

        echo '<entry>' . "\n";

        if (!empty($row['author']))

        {

                echo '<author><name><![CDATA[' . $row['author'] . ']]></name></author>' . "\n";

        }

        echo '<updated>' . ((!empty($row['updated'])) ? $row['updated'] : $row['published']) . '</updated>' . "\n";

        if (!empty($row['published']))

        {

                echo '<published>' . $row['published'] . '</published>' . "\n";

        }

        echo '<id>' . $row['link'] . '</id>' . "\n";

        echo '<link href="' . $row['link'] . '"/>' . "\n";

        echo '<title type="html"><![CDATA[' . $row['title'] . ']]></title>' . "\n\n";

        if (!empty($row['category']) && isset($row['category_name']) && $row['category_name'] !== '')

        {

                echo '<category term="' . $row['category_name'] . '" scheme="' . $row['category'] . '" label="' . $row['category_name'] . '"/>' . "\n";

        }

        echo '<content type="html" xml:base="' . $row['link'] . '"><![CDATA[' . "\n";

        echo $row['description'];

        if (!empty($row['statistics']))

        {

                echo '<p>' . $user->lang['STATISTICS'] . ': ' . $row['statistics'] . '</p>';

        }

        echo '<hr />' . "\n" . ']]></content>' . "\n";

        echo '</entry>' . "\n";

}

echo '</feed>';

garbage_collection();

exit_handler();

/**

* Run links through append_sid(), prepend generate_board_url() and remove session id

**/

function feed_append_sid($url, $params)

{

        global $board_url;

        return append_sid($board_url . $url, $params, true, '');

}

/**

* Generate ISO 8601 date string (RFC 3339)

**/

function feed_format_date($time)

{

        static $zone_offset;

        static $offset_string;

        if (empty($offset_string))

        {

                global $user;

                $zone_offset = (int) $user->timezone + (int) $user->dst;

                $sign = ($zone_offset < 0) ? '-' : '+';

                $time_offset = abs($zone_offset);

                $offset_seconds        = $time_offset % 3600;

                $offset_minutes        = $offset_seconds / 60;

                $offset_hours        = ($time_offset - $offset_seconds) / 3600;

                $offset_string        = sprintf("%s%02d:%02d", $sign, $offset_hours, $offset_minutes);

        }

        return gmdate("Y-m-d\TH:i:s", $time + $zone_offset) . $offset_string;

}

/**

* Generate text content

**/

function feed_generate_content($content, $uid, $bitfield, $options)

{

        global $user, $config, $phpbb_root_path, $phpEx, $board_url;

        if (empty($content))

        {

                return '';

        }

        // Prepare some bbcodes for better parsing

        $content        = preg_replace("#\[quote(=&quot;.*?&quot;)?:$uid\]\s*(.*?)\s*\[/quote:$uid\]#si", "[quote$1:$uid]<br />$2<br />[/quote:$uid]", $content);

        $content = generate_text_for_display($content, $uid, $bitfield, $options);

        // Add newlines

        $content = str_replace('<br />', '<br />' . "\n", $content);

        // Convert smiley Relative paths to Absolute path, Windows style

        $content = str_replace($phpbb_root_path . $config['smilies_path'], $board_url . '/' . $config['smilies_path'], $content);

        // Remove "Select all" link and mouse events

        $content = str_replace('<a href="#" onclick="selectCode(this); return false;">' . $user->lang['SELECT_ALL_CODE'] . '</a>', '', $content);

        $content = preg_replace('#(onkeypress|onclick)="(.*?)"#si', '', $content);

        // Firefox does not support CSS for feeds, though

        // Remove font sizes

//        $content = preg_replace('#<span style="font-size: [0-9]+%; line-height: [0-9]+%;">([^>]+)</span>#iU', '\1', $content);

        // Make text strong :P

//        $content = preg_replace('#<span style="font-weight: bold?">(.*?)</span>#iU', '<strong>\1</strong>', $content);

        // Italic

//        $content = preg_replace('#<span style="font-style: italic?">([^<]+)</span>#iU', '<em>\1</em>', $content);

        // Underline

//        $content = preg_replace('#<span style="text-decoration: underline?">([^<]+)</span>#iU', '<u>\1</u>', $content);

        // Remove embed Windows Media Streams

        $content        = preg_replace( '#<\!--\[if \!IE\]>-->([^[]+)<\!--<!\[endif\]-->#si', '', $content);

        // Do not use < and >, because we want to retain code contained in [code][/code]

        // Remove embed and objects

        $content        = preg_replace( '#<(object|embed)(.*?) (value|src)=(.*?) ([^[]+)(object|embed)>#si',' <a href=$4 target="_blank"><strong>$1</strong></a> ',$content);

        // Remove some specials html tag, because somewhere there are a mod to allow html tags ;)

        $content        = preg_replace( '#<(script|iframe)([^[]+)\1>#siU', ' <strong>$1</strong> ', $content);

        // Remove Comments from inline attachments [ia]

        $content        = preg_replace('#<div class="(inline-attachment|attachtitle)">(.*?)<!-- ia(.*?) -->(.*?)<!-- ia(.*?) -->(.*?)</div>#si','$4',$content);

        // Replace some entities with their unicode counterpart

        $entities = array(

                ' '        => "\xC2\xA0",

                '•'        => "\xE2\x80\xA2",

                '·'        => "\xC2\xB7",

                '©'        => "\xC2\xA9",

        );

        $content = str_replace(array_keys($entities), array_values($entities), $content);

        // Remove CDATA blocks. ;)

        $content = preg_replace('#\<\!\[CDATA\[(.*?)\]\]\>#s', '', $content);

        // Other control characters

        $content = preg_replace('#(?:[\x00-\x1F\x7F]+|(?:\xC2[\x80-\x9F])+)#', '', $content);

        return $content;

}

/**

* Factory class to return correct object

* @package phpBB3

*/

class phpbb_feed_factory

{

        /**

        * Return correct object for specified mode

        *

        * @param string        $mode                The feeds mode.

        * @param int        $forum_id        Forum id specified by the script if forum feed provided.

        * @param int        $topic_id        Topic id specified by the script if topic feed provided.

        *

        * @return object        Returns correct feeds object for specified mode.

        */

        function init($mode, $forum_id, $topic_id)

        {

                global $config;

                switch ($mode)

                {

                        case 'forums':

                                if (!$config['feed_overall_forums'])

                                {

                                        return false;

                                }

                                return new phpbb_feed_forums();

                        break;

                        case 'topics':

                        case 'topics_new':

                                if (!$config['feed_topics_new'])

                                {

                                        return false;

                                }

                                return new phpbb_feed_topics();

                        break;

                        case 'topics_active':

                                if (!$config['feed_topics_active'])

                                {

                                        return false;

                                }

                                return new phpbb_feed_topics_active();

                        break;

                        case 'news':

                                global $db;

                                // Get at least one news forum

                                $sql = 'SELECT forum_id

                                        FROM ' . FORUMS_TABLE . '

                                        WHERE ' . $db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');

                                $result = $db->sql_query_limit($sql, 1, 0, 600);

                                $s_feed_news = (int) $db->sql_fetchfield('forum_id');

                                $db->sql_freeresult($result);

                                if (!$s_feed_news)

                                {

                                        return false;

                                }

                                return new phpbb_feed_news();

                        break;

                        default:

                                if ($topic_id && $config['feed_topic'])

                                {

                                        return new phpbb_feed_topic($topic_id);

                                }

                                else if ($forum_id && $config['feed_forum'])

                                {

                                        return new phpbb_feed_forum($forum_id);

                                }

                                else if ($config['feed_overall'])

                                {

                                        return new phpbb_feed_overall();

                                }

                                return false;

                        break;

                }

        }

}

/**

* Base class with some generic functions and settings.

*

* @package phpBB3

*/

class phpbb_feed_base

{

        /**

        * SQL Query to be executed to get feed items

        */

        var $sql = array();

        /**

        * Keys specified for retrieval of title, content, etc.

        */

        var $keys = array();

        /**

        * Number of items to fetch. Usually overwritten by $config['feed_something']

        */

        var $num_items = 15;

        /**

        * Separator for title elements to separate items (for example forum / topic)

        */

        var $separator = "\xE2\x80\xA2"; // •

        /**

        * Separator for the statistics row (Posted by, post date, replies, etc.)

        */

        var $separator_stats = "\xE2\x80\x94"; // —

        /**

        * Constructor

        */

        function phpbb_feed_base()

        {

                global $config;

                $this->set_keys();

                // Allow num_items to be string

                if (is_string($this->num_items))

                {

                        $this->num_items = (int) $config[$this->num_items];

                        // A precaution

                        if (!$this->num_items)

                        {

                                $this->num_items = 10;

                        }

                }

        }

        /**

        * Set keys.

        */

        function set_keys()

        {

        }

        /**

        * Open feed

        */

        function open()

        {

        }

        /**

        * Close feed

        */

        function close()

        {

                global $db;

                if (!empty($this->result))

                {

                        $db->sql_freeresult($this->result);

                }

        }

        /**

        * Set key

        */

        function set($key, $value)

        {

                $this->keys[$key] = $value;

        }

        /**

        * Get key

        */

        function get($key)

        {

                return (isset($this->keys[$key])) ? $this->keys[$key] : NULL;

        }

        function get_readable_forums()

        {

                global $auth;

                static $forum_ids;

                if (!isset($forum_ids))

                {

                        $forum_ids = array_keys($auth->acl_getf('f_read', true));

                }

                return $forum_ids;

        }

        function get_moderator_approve_forums()

        {

                global $auth;

                static $forum_ids;

                if (!isset($forum_ids))

                {

                        $forum_ids = array_keys($auth->acl_getf('m_approve', true));

                }

                return $forum_ids;

        }

        function is_moderator_approve_forum($forum_id)

        {

                static $forum_ids;

                if (!isset($forum_ids))

                {

                        $forum_ids = array_flip($this->get_moderator_approve_forums());

                }

                if (!$forum_id)

                {

                        // Global announcement, your a moderator in any forum than it's okay.

                        return (!empty($forum_ids)) ? true : false;

                }

                return (isset($forum_ids[$forum_id])) ? true : false;

        }

        function get_excluded_forums()

        {

                global $db, $cache;

                static $forum_ids;

                // Matches acp/acp_board.php

                $cache_name        = 'feed_excluded_forum_ids';

                if (!isset($forum_ids) && ($forum_ids = $cache->get('_' . $cache_name)) === false)

                {

                        $sql = 'SELECT forum_id

                                FROM ' . FORUMS_TABLE . '

                                WHERE ' . $db->sql_bit_and('forum_options', FORUM_OPTION_FEED_EXCLUDE, '<> 0');

                        $result = $db->sql_query($sql);

                        $forum_ids = array();

                        while ($forum_id = (int) $db->sql_fetchfield('forum_id'))

                        {

                                $forum_ids[$forum_id] = $forum_id;

                        }

                        $db->sql_freeresult($result);

                        $cache->put('_' . $cache_name, $forum_ids);

                }

                return $forum_ids;

        }

        function is_excluded_forum($forum_id)

        {

                $forum_ids = $this->get_excluded_forums();

                return isset($forum_ids[$forum_id]) ? true : false;

        }

        function get_passworded_forums()

        {

                global $user;

                return $user->get_passworded_forums();

        }

        function get_item()

        {

                global $db, $cache;

                static $result;

                if (!isset($result))

                {

                        if (!$this->get_sql())

                        {

                                return false;

                        }

                        // Query database

                        $sql = $db->sql_build_query('SELECT', $this->sql);

                        $result = $db->sql_query_limit($sql, $this->num_items);

                }

                return $db->sql_fetchrow($result);

        }

        function user_viewprofile($row)

        {

                global $phpEx, $user;

                $author_id = (int) $row[$this->get('author_id')];

                if ($author_id == ANONYMOUS)

                {

                        // Since we cannot link to a profile, we just return GUEST

                        // instead of $row['username']

                        return $user->lang['GUEST'];

                }

                return '<a href="' . feed_append_sid('/memberlist.' . $phpEx, 'mode=viewprofile&amp;u=' . $author_id) . '">' . $row[$this->get('creator')] . '</a>';

        }

}

/**

* Abstract class for post based feeds

*

* @package phpBB3

*/

class phpbb_feed_post_base extends phpbb_feed_base

{

        var $num_items = 'feed_limit_post';

        function set_keys()

        {

                $this->set('title',                'post_subject');

                $this->set('title2',        'topic_title');

                $this->set('author_id',        'user_id');

                $this->set('creator',        'username');

                $this->set('published',        'post_time');

                $this->set('updated',        'post_edit_time');

                $this->set('text',                'post_text');

                $this->set('bitfield',        'bbcode_bitfield');

                $this->set('bbcode_uid','bbcode_uid');

                $this->set('enable_bbcode',                'enable_bbcode');

                $this->set('enable_smilies',        'enable_smilies');

                $this->set('enable_magic_url',        'enable_magic_url');

        }

        function adjust_item(&$item_row, &$row)

        {

                global $phpEx, $config, $user;

                $item_row['link'] = feed_append_sid('/viewtopic.' . $phpEx, "t={$row['topic_id']}&p={$row['post_id']}#p{$row['post_id']}");

                if ($config['feed_item_statistics'])

                {

                        $item_row['statistics'] = $user->lang['POSTED'] . ' ' . $user->lang['POST_BY_AUTHOR'] . ' ' . $this->user_viewprofile($row)

                                . ' ' . $this->separator_stats . ' ' . $user->format_date($row[$this->get('published')])

                                . (($this->is_moderator_approve_forum($row['forum_id']) && !$row['post_approved']) ? ' ' . $this->separator_stats . ' ' . $user->lang['POST_UNAPPROVED'] : '');

                }

        }

}

/**

* Abstract class for topic based feeds

*

* @package phpBB3

*/

class phpbb_feed_topic_base extends phpbb_feed_base

{

        var $num_items = 'feed_limit_topic';

        function set_keys()

        {

                $this->set('title',                'topic_title');