<?php

/**
 * @package tikiwiki
 */

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

require_once('tiki-setup.php');
$rsslib = TikiLib::lib('rss');

$access->check_feature('feature_articles');

if ($prefs['feed_articles'] != 'y') {
    $errmsg = tra("rss feed disabled");
    require_once('tiki-rss_error.php');
}

$res = $access->authorize_rss(['tiki_p_read_article','tiki_p_admin_cms', 'tiki_p_articles_read_heading']);
if ($res) {
    if ($res['header'] == 'y') {
        header('WWW-Authenticate: Basic realm="' . $tikidomain . '"');
        header('HTTP/1.0 401 Unauthorized');
    }
    $errmsg = $res['msg'];
    require_once('tiki-rss_error.php');
}

$feed = "articles";
if (isset($_REQUEST["topic"])) {
    $topic = $_REQUEST["topic"];
    $uniqueid = $feed . "." . $topic;
    $topic = (int) preg_replace('/[^0-9]/', '', $topic);
} elseif (isset($_REQUEST['topicname'])) {
    $artlib = TikiLib::lib('art');
    $topic = $artlib->fetchtopicId($_REQUEST['topicname']);
    $uniqueid = $feed . "." . $topic;
} else {
    $uniqueid = $feed;
    $topic = "";
}

if (isset($_REQUEST["type"])) {
        $type = $_REQUEST["type"];
        $uniqueid .= '-' . $type;
} else {
        $type = '';
}

if (isset($_REQUEST['lang'])) {
    $articleLang = $_REQUEST['lang'];
    $prefs['feed_language'] = $articleLang;
} else {
    $articleLang = '';
}
$uniqueid .= '/' . $articleLang;

$categId = '';
if (isset($_REQUEST["category"])) {
    $categlib = TikiLib::lib('categ');
    if (is_array($_REQUEST["category"])) {
        foreach ($_REQUEST["category"] as $categname) {
            $categIds[] = $categlib->get_category_id($categname);
        }
        sort($categIds);
        $categId = ['AND' => $categIds];
        $uniqueid .= '-' . implode('-', $categIds);
        ;
    } else {
        $categId = $categlib->get_category_id($_REQUEST["category"]);
        $uniqueid .= '-' . $categId;
    }
}
// Specifying categories by ID takes precedence, as it is more reliable
if (isset($_REQUEST["categId"])) {
    if (is_array($_REQUEST["categId"])) {
        sort($_REQUEST["categId"]);
        $categId = (int) $_REQUEST["categId"];
        $categId = ['AND' => $_REQUEST["categId"]];
        $uniqueid .= '-' . implode('-', $_REQUEST["categId"]);
        ;
    } else {
        $categId = (int) $_REQUEST["categId"];
        $uniqueid .= '-' . $categId;
    }
}

if ($topic and ! $tikilib->user_has_perm_on_object($user, $topic, 'topic', 'tiki_p_read_article')) {
    $smarty->assign('errortype', 401);
    $errmsg = tra("You do not have permission to view this section");
    require_once('tiki-rss_error.php');
}

$output = $rsslib->get_from_cache($uniqueid);

if ($output["data"] == "EMPTY") {
    $title = $prefs['feed_articles_title'];
    $desc = $prefs['feed_articles_desc'];
    $id = "articleId";
    $titleId = "title";
    $descId = "heading";
    $dateId = "publishDate";
    $authorId = "author";
    $readrepl = "tiki-read_article.php?$id=%s";

    $tmp = $prefs['feed__' . $feed . '_title'];
    if ($tmp <> '') {
        $title = $tmp;
    }
    $tmp = $prefs['feed_' . $feed . '_desc'];
    if ($desc <> '') {
        $desc = $tmp;
    }

    $artlib = TikiLib::lib('art');
    $changes = $artlib->list_articles(0, $prefs['feed_articles_max'], $dateId . '_desc', '', 0, $tikilib->now, $user, $type, $topic, 'y', '', $categId, '', '', $articleLang, '', '', false, 'y');
    $tmp = [];
    include_once('tiki-sefurl.php');
    foreach ($changes["data"] as $data) {
        $data["$descId"] = TikiLib::lib('parser')->parse_data($data[$descId], ['print' => true]);
        $data["body"] = null;
        $data['sefurl'] = filter_out_sefurl(sprintf($readrepl, $data['articleId']), 'article', $data['title']);
        $tmp[] = $data;
    }
    $changes["data"] = $tmp;
    $tmp = null;
    $output = $rsslib->generate_feed($feed, $uniqueid, '', $changes, $readrepl, '', $id, $title, $titleId, $desc, $descId, $dateId, $authorId);
}
header("Content-type: " . $output["content-type"]);
print $output["data"];