Raiju/route.php

<?php
/**
 * Front controller for Apache (production).
 *
 * .htaccess sends all non-static requests here. This file handles:
 * - Clean URLs (strip .php extension)
 * - Primary language root access (/about → /en/about)
 * - Language-prefixed pages (/de/beispiel)
 * - News post URLs (/news/slug, /en/news/slug)
 * - JSON-based standard pages (via includes/page.php)
 *
 * Language detection uses SITE_LANG_DEFAULT from admin/config.php,
 * so .htaccess never needs to be edited for language changes.
 */

// Keep custom front-controller integrations on the same URL contract.
require_once __DIR__ . '/includes/routing-helper.php';
raijuRoutingCanonicalize(__DIR__);

// Load config
$configPath = __DIR__ . '/admin/config.php';
if (!file_exists($configPath)) {
    header('Location: /admin/setup.php');
    exit;
}
require_once $configPath;

require_once __DIR__ . '/includes/page-path.php';
require_once __DIR__ . '/includes/access-guard.php';
raijuAccessEnforceMaintenance();
// Owner-only preview of an AI change set: its new pages exist only as overlay, so the router must know them.
if (isset($_GET['rj_agent_preview']) && is_file(__DIR__ . '/includes/ai/agent/preview.php')) {
    require_once __DIR__ . '/includes/ai/agent/preview.php';
    raijuAgentPreviewBoot();
}
$raijuPreviewHas = static fn(string $key): bool => function_exists('raijuContentOverlayFor') && raijuContentOverlayFor($key) !== null;
require_once __DIR__ . '/includes/seo-helper.php';
// Visits are counted in includes/header.php; the router schedules a fallback
// for templates whose header does not call the tracker (see analytics-helper.php).
require_once __DIR__ . '/includes/analytics-helper.php';

// Apply migration redirects before any other routing — a redirected URL
// must never accidentally match a real page slug downstream.
require_once __DIR__ . '/includes/redirect-helper.php';
applyRedirects($_SERVER['REQUEST_URI'] ?? '/');

$primaryLang = defined('SITE_LANG_DEFAULT') ? SITE_LANG_DEFAULT : 'en';

// Parse the clean URI
$uri = parse_url($_SERVER['REQUEST_URI'] ?? '/', PHP_URL_PATH);
$cleanUri = trim($uri, '/');

if ($cleanUri === 'sitemap.xml') {
    raijuSeoServeSitemap();
}
if ($cleanUri === 'robots.txt') {
    raijuSeoServeRobots();
}

// A language homepage can also be backed only by JSON.
if (preg_match('/^[a-z]{2}$/D', $cleanUri) && isset($SITE_LANGUAGES[$cleanUri])) {
    $lang = $cleanUri;
    $slug = 'home';
    $basePath = str_ends_with((string)$uri, '/') ? '../' : '';
    $langHome = __DIR__ . '/' . $lang . '/index.php';
    if (is_file($langHome)) {
        raijuAccessEnforceCurrentTemplatePage($lang . '_home');
        raijuAnalyticsScheduleTrack($lang . '_home', $lang, 'home');
        include $langHome;
        exit;
    }
    if (is_file(raijuPageJsonPath(__DIR__, $lang, $slug)) || $raijuPreviewHas(raijuPageContentKey($lang, $slug))) {
        raijuAnalyticsScheduleTrack(raijuPageContentKey($lang, $slug), $lang, $slug);
        include __DIR__ . '/includes/page.php';
        exit;
    }
}

// Root URL → homepage
if ($cleanUri === '') {
    $basePath = '';
    $langHome = __DIR__ . '/' . $primaryLang . '/index.php';
    $jsonHome = __DIR__ . '/content/pages/' . $primaryLang . '_home.json';

    if (is_file($langHome)) {
        raijuAccessEnforceCurrentTemplatePage($primaryLang . '_home');
        raijuAnalyticsScheduleTrack($primaryLang . '_home', $primaryLang, 'home');
        include $langHome;
    } elseif (is_file($jsonHome)) {
        $lang = $primaryLang;
        $slug = 'home';
        raijuAnalyticsScheduleTrack($primaryLang . '_home', $primaryLang, 'home');
        include __DIR__ . '/includes/page.php';
    } else {
        echo '<p>No homepage found. Run the <a href="admin/setup.php">setup wizard</a> to get started.</p>';
    }
    exit;
}

// ------------------------------------------------------------------
// News post URLs: /{lang}/news/{slug} or /news/{slug}
// ------------------------------------------------------------------
if (preg_match('#^([a-z]{2})/news/([a-z0-9-]+)$#', $cleanUri, $m)) {
    $currentLang = $m[1];
    $_GET['slug'] = $m[2];
    $basePath = raijuPageBasePath('news/' . $m[2], true);
    raijuAnalyticsScheduleTrack(null, $currentLang, 'news');
    include __DIR__ . '/includes/news-post.php';
    exit;
}
if (preg_match('#^news/([a-z0-9-]+)$#', $cleanUri, $m)) {
    $currentLang = $primaryLang;
    $_GET['slug'] = $m[1];
    $basePath = raijuPageBasePath('news/' . $m[1], false);
    raijuAnalyticsScheduleTrack(null, $currentLang, 'news');
    include __DIR__ . '/includes/news-post.php';
    exit;
}

// ------------------------------------------------------------------
// Language-prefixed URL: /{lang}/{path}
// ------------------------------------------------------------------
if (preg_match('#^([a-z]{2})/(' . raijuPagePathPattern() . ')$#', $cleanUri, $m)) {
    $lang = $m[1];
    $slug = $m[2];
    $contentPage = raijuPageContentKey($lang, $slug);

    // 1. Physical PHP file
    $phpFile = raijuPageTemplatePath(__DIR__, $lang, $slug);
    if (is_file($phpFile)) {
        $basePath = raijuPageBasePath($slug, true);
        raijuAccessEnforceCurrentTemplatePage($contentPage);
        raijuAnalyticsScheduleTrack($contentPage, $lang, $slug);
        include $phpFile;
        exit;
    }

    // 2. JSON content → front controller
    $jsonFile = raijuPageJsonPath(__DIR__, $lang, $slug);
    if (is_file($jsonFile) || $raijuPreviewHas($contentPage)) {
        $basePath = raijuPageBasePath($slug, true);
        raijuAnalyticsScheduleTrack($contentPage, $lang, $slug);
        include __DIR__ . '/includes/page.php';
        exit;
    }
}

// ------------------------------------------------------------------
// Root-level path: /{path} → primary language
// ------------------------------------------------------------------
if (preg_match('#^' . raijuPagePathPattern() . '$#', $cleanUri)) {
    $lang = $primaryLang;
    $slug = $cleanUri;
    $contentPage = raijuPageContentKey($lang, $slug);

    // 1. Physical PHP file (with .php extension)
    $phpFile = raijuPageTemplatePath(__DIR__, $lang, $slug);
    if (is_file($phpFile)) {
        $basePath = raijuPageBasePath($slug, false);
        raijuAccessEnforceCurrentTemplatePage($contentPage);
        raijuAnalyticsScheduleTrack($contentPage, $lang, $slug);
        include $phpFile;
        exit;
    }

    // 2. JSON content → front controller
    $jsonFile = raijuPageJsonPath(__DIR__, $lang, $slug);
    if (is_file($jsonFile) || $raijuPreviewHas($contentPage)) {
        $basePath = raijuPageBasePath($slug, false);
        raijuAnalyticsScheduleTrack($contentPage, $lang, $slug);
        include __DIR__ . '/includes/page.php';
        exit;
    }
}

// ------------------------------------------------------------------
// Nothing matched → 404
// ------------------------------------------------------------------
http_response_code(404);
include __DIR__ . '/404.php';