varlog/public/feed.php

<?php

declare(strict_types=1);

define('BASE_PATH', realpath(__DIR__ . '/../'));

require_once BASE_PATH . '/bootstrap.php';
require_once BASE_PATH . '/src/helpers.php';
require_once BASE_PATH . '/src/auth.php';
require_once BASE_PATH . '/config/config.php';
require_once BASE_PATH . '/src/ArticleManager.php';

const FEED_PAGE_SIZE = 20;

$articles = new ArticleManager(BASE_PATH . '/data');

$now  = time();
$base = rtrim(APP_URL, '/');

$all = array_values(array_filter(
    $articles->getAll(publishedOnly: true),
    static fn (array $a): bool => strtotime((string)($a['published_at'] ?? '')) <= $now
));

// ─── Détection navigateur ────────────────────────────────────────────────────
$accept    = $_SERVER['HTTP_ACCEPT'] ?? '';
$isBrowser = str_contains($accept, 'text/html')
          && !str_contains($accept, 'application/rss+xml');

if ($isBrowser) {
    require_once BASE_PATH . '/src/Parsedown.php';
    $Parsedown = new Parsedown();

    $feedUrl  = $base . '/feed';
    $recentItems = array_slice($all, 0, 10);

    ob_start();
    ?>
    <div class="row justify-content-center">
    <div class="col-lg-7">

    <div class="mb-5">
        <h1 class="h3 mb-1">Flux RSS — varlog</h1>
        <p class="text-muted mb-0">Journal personnel de Cédrix — informatique, hack et loisirs techniques.</p>
    </div>

    <div class="card mb-5">
        <div class="card-body">
            <h2 class="h6 fw-semibold mb-2">S'abonner</h2>
            <p class="text-muted small mb-3">
                Copiez cette URL dans votre lecteur RSS (Miniflux, Feedly, NetNewsWire…)
                pour recevoir les nouveaux articles automatiquement.
            </p>
            <div class="input-group">
                <input type="text" class="form-control font-monospace small"
                       value="<?= htmlspecialchars($feedUrl) ?>"
                       id="rss-url-input" readonly>
                <button class="btn btn-outline-secondary btn-sm"
                        onclick="navigator.clipboard.writeText(document.getElementById('rss-url-input').value).then(()=>{this.textContent='Copié ✓';setTimeout(()=>this.textContent='Copier',1500)})"
                        type="button">Copier</button>
            </div>
        </div>
    </div>

    <h2 class="h5 mb-3">Derniers articles</h2>
    <div class="d-flex flex-column gap-3">
    <?php foreach ($recentItems as $a):
        $slug    = $a['slug'] ?? '';
        $pubDate = date('d/m/Y', (int)strtotime((string)($a['published_at'] ?? $a['created_at'] ?? '')));
        $preview = mb_strimwidth(strip_tags($Parsedown->text($a['content'] ?? '')), 0, 100, '…');
        $cat     = trim($a['category'] ?? '');
    ?>
    <a href="/post/<?= rawurlencode($slug) ?>" class="text-decoration-none text-reset d-block p-3 border rounded">
        <div class="d-flex justify-content-between align-items-start gap-2 mb-1">
            <span class="fw-semibold"><?= htmlspecialchars($a['title'] ?? '') ?></span>
            <span class="text-muted small text-nowrap"><?= $pubDate ?></span>
        </div>
        <?php if ($cat !== ''): ?>
            <span class="badge bg-secondary fw-normal mb-1"><?= htmlspecialchars($cat) ?></span>
        <?php endif; ?>
        <p class="text-muted small mb-0"><?= htmlspecialchars($preview) ?></p>
    </a>
    <?php endforeach; ?>
    </div>

    </div>
    </div>
    <?php
    $content   = ob_get_clean();
    $title     = 'Flux RSS — varlog';
    $canonical = $base . '/feed';
    $metaRobots = 'noindex, follow';
    include BASE_PATH . '/templates/layout.php';
    exit;
}

// ─── Flux XML pour les lecteurs RSS ─────────────────────────────────────────
$total    = count($all);
$lastPage = max(1, (int)ceil($total / FEED_PAGE_SIZE));
$page     = max(1, min($lastPage, (int)($_GET['page'] ?? 1)));
$items    = array_slice($all, ($page - 1) * FEED_PAGE_SIZE, FEED_PAGE_SIZE);

$feedUrlFn = static fn (int $p): string => $base . '/feed' . ($p > 1 ? '?page=' . $p : '');

$lastBuild = '';
foreach ($all as $a) {
    $ts = (int)strtotime((string)($a['updated_at'] ?? $a['published_at'] ?? ''));
    if ($ts > (int)strtotime($lastBuild ?: '1970-01-01')) {
        $lastBuild = date(DATE_RSS, $ts);
    }
}
if ($lastBuild === '') {
    $lastBuild = date(DATE_RSS);
}

header('Content-Type: application/rss+xml; charset=UTF-8');
header('X-Content-Type-Options: nosniff');

echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
?>
<rss version="2.0"
     xmlns:atom="http://www.w3.org/2005/Atom"
     xmlns:fh="http://purl.org/syndication/history/1.0">
  <channel>
    <title>varlog</title>
    <link><?= htmlspecialchars($base) ?></link>
    <description>Journal personnel de Cédrix — informatique, hack et loisirs techniques.</description>
    <language>fr</language>
    <lastBuildDate><?= htmlspecialchars($lastBuild) ?></lastBuildDate>

    <!-- Flux canonique (toujours page 1) -->
    <atom:link href="<?= htmlspecialchars($feedUrlFn(1)) ?>" rel="self" type="application/rss+xml"/>

    <?php if ($page > 1): ?>
    <!-- Navigation entre pages -->
    <atom:link href="<?= htmlspecialchars($feedUrlFn(1)) ?>" rel="first" type="application/rss+xml"/>
    <atom:link href="<?= htmlspecialchars($feedUrlFn($page - 1)) ?>" rel="previous" type="application/rss+xml"/>
    <?php endif; ?>
    <?php if ($page < $lastPage): ?>
    <atom:link href="<?= htmlspecialchars($feedUrlFn($page + 1)) ?>" rel="next" type="application/rss+xml"/>
    <atom:link href="<?= htmlspecialchars($feedUrlFn($lastPage)) ?>" rel="last" type="application/rss+xml"/>
    <?php endif; ?>

    <?php if ($lastPage > 1): ?>
    <!-- Métadonnées de pagination (RFC 5005) -->
    <fh:archive/>
    <?php endif; ?>

<?php foreach ($items as $article):
    $pubDate = date(DATE_RSS, (int)strtotime((string)($article['published_at'] ?? $article['created_at'] ?? '')));
    $link    = $base . '/post/' . rawurlencode($article['slug'] ?? '');
    $title   = htmlspecialchars($article['title'] ?? '', ENT_XML1);
    $desc    = htmlspecialchars(mb_strimwidth(strip_tags($article['content'] ?? ''), 0, 300, '…'), ENT_XML1);
    $guid    = htmlspecialchars($base . '/post/' . rawurlencode($article['slug'] ?? ''), ENT_XML1);
    ?>
    <item>
      <title><?= $title ?></title>
      <link><?= htmlspecialchars($link) ?></link>
      <description><?= $desc ?></description>
      <pubDate><?= htmlspecialchars($pubDate) ?></pubDate>
      <guid isPermaLink="true"><?= $guid ?></guid>
    </item>
<?php endforeach; ?>
  </channel>
</rss>