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<?php
/**
* Publically available page to feed the news to feedreaders
*/
function user_atom()
{
global $user, $display_news;
if (!isset($_REQUEST['key']) || !preg_match('/^[0-9a-f]{32}$/', $_REQUEST['key'])) {
engelsystem_error('Missing key.');
}
$key = $_REQUEST['key'];
$user = User_by_api_key($key);
if ($user == null) {
engelsystem_error('Key invalid.');
}
if (!in_array('atom', privileges_for_user($user['UID']))) {
engelsystem_error('No privilege for atom.');
}
$news = sql_select("
SELECT *
FROM `News`
" . (empty($_REQUEST['meetings']) ? '' : 'WHERE `Treffen` = 1 ') . "
ORDER BY `ID`
DESC LIMIT " . (int)$display_news
);
$output = make_atom_entries_from_news($news);
header('Content-Type: application/atom+xml; charset=utf-8');
header('Content-Length: ' . strlen($output));
raw_output($output);
}
/**
* @param array[] $news_entries
* @return string
*/
function make_atom_entries_from_news($news_entries)
{
$html = '<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>Engelsystem</title>
<id>' . $_SERVER['HTTP_HOST']
. htmlspecialchars(preg_replace(
'#[&?]key=[a-f0-9]{32}#',
'',
$_SERVER['REQUEST_URI']
))
. '</id>
<updated>' . date('Y-m-d\TH:i:sP', $news_entries[0]['Datum']) . '</updated>' . "\n";
foreach ($news_entries as $news_entry) {
$html .= make_atom_entry_from_news($news_entry);
}
$html .= '</feed>';
return $html;
}
function make_atom_entry_from_news($news_entry)
{
return ' <entry>
<title>' . htmlspecialchars($news_entry['Betreff']) . '</title>
<link href="' . page_link_to_absolute('news_comments&nid=') . $news_entry['ID'] . '"/>
<id>' . preg_replace('#^https?://#', '', page_link_to_absolute('news')) . '-' . $news_entry['ID'] . '</id>
<updated>' . date('Y-m-d\TH:i:sP', $news_entry['Datum']) . '</updated>
<summary type="html">' . htmlspecialchars($news_entry['Text']) . '</summary>
</entry>' . "\n";
}
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