folderweb/app/router.php

<?php

// Load modular components
require_once __DIR__ . '/config.php';
require_once __DIR__ . '/helpers.php';
require_once __DIR__ . '/content.php';
require_once __DIR__ . '/rendering.php';

// Check for assets in /custom/assets/ served at root level
$assetPath = dirname(__DIR__) . '/custom/assets/' . $requestPath;
if (file_exists($assetPath) && is_file($assetPath)) {
    header('Content-Type: ' . (mime_content_type($assetPath) ?: 'application/octet-stream'));
    readfile($assetPath);
    exit;
}

// Handle frontpage
if (empty($requestPath)) {
    // Find all content files in the root content directory
    $contentFiles = findAllContentFiles($contentDir, $currentLang, $defaultLang);
    
    if (!empty($contentFiles)) {
        renderMultipleFiles($contentFiles, $contentDir);
    }
}

// Parse and handle request
$parsedPath = parseRequestPath($requestPath, $contentDir, $hasTrailingSlash, $currentLang, $defaultLang);

switch ($parsedPath['type']) {
    case 'page':
        // Page-type folder with content files (no subdirectories)
        // Redirect to add trailing slash if needed
        if (!empty($parsedPath['needsSlash'])) {
            header('Location: ' . rtrim($_SERVER['REQUEST_URI'], '/') . '/', true, 301);
            exit;
        }
        renderMultipleFiles($parsedPath['files'], $parsedPath['path']);

    case 'file':
        // Direct file access or legacy single file
        // Redirect to add trailing slash if this is a directory-based page
        if (!empty($parsedPath['needsSlash'])) {
            header('Location: ' . rtrim($_SERVER['REQUEST_URI'], '/') . '/', true, 301);
            exit;
        }
        renderFile($parsedPath['path']);

    case 'directory':
        $dir = $parsedPath['path'];
        if (file_exists("$dir/index.php")) {
            renderFile("$dir/index.php");
        }

        // Check for page content files in this directory
        $pageContent = null;
        $contentFiles = findAllContentFiles($dir, $currentLang, $defaultLang);
        if (!empty($contentFiles)) {
            ob_start();
            foreach ($contentFiles as $file) {
                $ext = pathinfo($file, PATHINFO_EXTENSION);
                if ($ext === 'md') {
                    if (!class_exists('Parsedown')) {
                        require_once __DIR__ . '/vendor/Parsedown.php';
                    }
                    echo (new Parsedown())->text(file_get_contents($file));
                } else {
                    include $file;
                }
            }
            $pageContent = ob_get_clean();
        }

        // Load metadata for this directory
        $metadata = loadMetadata($dir, $currentLang, $defaultLang);

        // Select list template based on metadata page_template
        if (isset($metadata['page_template']) && !empty($metadata['page_template'])) {
            $templateName = $metadata['page_template'];
            // Add .php extension if not present
            if (!str_ends_with($templateName, '.php')) {
                $templateName .= '.php';
            }
            $customTemplate = dirname(__DIR__) . '/custom/templates/' . $templateName;
            $defaultTemplate = __DIR__ . '/default/templates/' . $templateName;
            
            if (file_exists($customTemplate)) {
                $listTemplate = $customTemplate;
            } elseif (file_exists($defaultTemplate)) {
                $listTemplate = $defaultTemplate;
            }
            // If template doesn't exist, fall back to default $listTemplate
        }

        // Default directory listing
        $subdirs = array_filter(
            scandir($dir) ?: [],
            fn($item) => !in_array($item, ['.', '..']) && is_dir("$dir/$item")
        );

        $items = array_filter(array_map(function($item) use ($dir, $requestPath, $currentLang, $defaultLang) {
            $itemPath = "$dir/$item";

            // Check if content exists for current language
            if ($currentLang !== $defaultLang) {
                $contentFiles = findAllContentFiles($itemPath, $currentLang, $defaultLang);
                if (empty($contentFiles)) return null;
            }

            $metadata = loadMetadata($itemPath, $currentLang, $defaultLang);
            $coverImage = findCoverImage($itemPath);
            $pdfFile = findPdfFile($itemPath);

            $title = $metadata['title'] ?? extractTitle($itemPath, $currentLang, $defaultLang) ?? $item;
            $date = null;
            if (isset($metadata['date'])) {
                $date = formatNorwegianDate($metadata['date']);
            } else {
                $date = extractDateFromFolder($item) ?: date("F d, Y", filemtime($itemPath));
            }

            $langPrefix = $currentLang !== $defaultLang ? "/$currentLang" : '';

            // Use translated slug if available, otherwise use folder name
            $urlSlug = ($currentLang !== $defaultLang && $metadata && isset($metadata['slug']))
                ? $metadata['slug']
                : $item;

            return [
                'title' => $title,
                'date' => $date,
                'url' => $langPrefix . '/' . trim($requestPath, '/') . '/' . urlencode($urlSlug),
                'cover' => $coverImage ? $langPrefix . '/' . trim($requestPath, '/') . '/' . urlencode($urlSlug) . '/' . $coverImage : null,
                'summary' => $metadata['summary'] ?? null,
                'pdf' => $pdfFile ? $langPrefix . '/' . trim($requestPath, '/') . '/' . urlencode($urlSlug) . '/' . $pdfFile : null,
                'redirect' => $metadata['redirect'] ?? null
            ];
        }, $subdirs));

        ob_start();
        include $listTemplate;
        $content = ob_get_clean();

        // Build navigation for base template
        $navigation = buildNavigation($contentDir, $currentLang, $defaultLang);

        include $baseTemplate;
        exit;

    case 'not_found':
        renderTemplate("<h1>404 Not Found</h1><p>The requested resource was not found.</p>", 404);
}