engelsystem/includes/pages/user_atom.php

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