site/ring/index.php

98 lines
3.5 KiB
PHP

<?php
$filepath = __FILE__;
$action = $_GET["action"] ?? "index";
$users = array_map(function ($f) { return basename(dirname($f)); }, glob("/home/*/.ring"));
if ($action !== "index") {
// handle webring redirects
$me = $_GET["me"] ?? "";
if (!in_array($me, $users) && $action != "random") {
header("Location: https://tilde.team/ring/?error");
die();
}
$i = array_search($me, $users);
switch ($action) {
case "random":
$notme = array_diff($users, [$me]);
$user = $notme[array_rand($notme)];
break;
case "next":
$user = $users[$i + 1] ?? reset($users);
break;
case "prev":
$user = $users[$i - 1] ?? end($users);
break;
default:
die("invalid action");
}
// use custom link from second line of ~/.ring
if (filesize("/home/$user/.ring") > 0) {
$ringfile = file("/home/$user/.ring", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
if (count($ringfile) > 1 && $ringfile[1] !== "")
$dest = trim($ringfile[1]);
}
$location = $dest ?? "/~$user/";
header("Location: $location");
die();
}
else {
// keep this as a string so we can escape it easily with htmlspecialchars()
$snippet = '<!-- tilde.team ring fragment-->
<div id="newring">
<div style="text-align: center;">
[<a href="https://tilde.team/ring/?action=prev&me=USERNAME">previous</a>]
[<a href="https://tilde.team/ring/?action=random&me=USERNAME">random</a>]
[<a href="https://tilde.team/ring/?action=next&me=USERNAME">next</a>]
<br>
<a href="https://tilde.team/ring/">how to join this webring</a>
</div>
</div>';
$title = "webring - how to join";
include __DIR__ . '/../header.php';
?>
<h1>how to join the webring</h1>
<?php if (isset($_GET["error"])): ?>
<div class="alert alert-danger" role="alert"><strong>ERROR</strong> please be sure that me=USERNAME is set to your user and have created a <code>~/.ring</code> file.</div>
<?php endif; ?>
<p>this webring can be joined by any user on tilde.team.</p>
<p>first, add the following links to your page, replacing USERNAME by your username (no ~):</p>
<pre><?=htmlspecialchars($snippet)?></pre>
<p>you may edit the code however you want. it should work as long as the URLs are kept in place and have your user in them.</p>
<p>then create a .ring file in your ~ to be added in the webring:</p>
<pre>$ touch ~/.ring</pre>
<p>the first line of ~/.ring will be displayed here as a tagline.</p>
<p>the second line of the file is used as a custom link if your webring tags are not on your homepage.</p>
<h3 id="explore">explore webring</h3>
<p><a href="?action=random">jump to random page</a></p>
<p><?=count($users)?> members in the webring:</p>
<ul>
<?php foreach ($users as $user):
if (filesize("/home/$user/.ring") > 0) {
$ringfile = file("/home/$user/.ring", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
$tagline = htmlspecialchars($ringfile[0]);
if (count($ringfile) > 1 && $ringfile[1] !== "")
$link = htmlspecialchars($ringfile[1]);
}
else {
unset($tagline);
unset($link);
} ?>
<li><a href="<?=$link ?? "/~$user/"?>">~<?=$user?></a><?=(isset($tagline) ? " &mdash; $tagline" : "")?></li>
<?php endforeach; ?>
</ul>
<p>it will probably work if you copy it to your own <code>~/public_html</code> and adjust the links accordingly.</p>
<?php
include __DIR__ . '/../footer.php';
}