folderweb/app/router.php

<?php

// Load modular components
require_once __DIR__ . '/constants.php';
require_once __DIR__ . '/helpers.php';
require_once __DIR__ . '/config.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)) {
    $contentFiles = findAllContentFiles($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)) {
            $pageContent = implode('', array_map('renderContentFile', $contentFiles));
        }

        // 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 = str_replace('.php', '', $templateName);
            }
            $customTemplate = dirname(__DIR__) . "/custom/templates/$templateName.php";
            $defaultTemplate = __DIR__ . "/default/templates/$templateName.php";
            
            if (file_exists($customTemplate)) {
                $listTemplate = $customTemplate;
            } elseif (file_exists($defaultTemplate)) {
                $listTemplate = $defaultTemplate;
            }
            // If template doesn't exist, fall back to default $listTemplate
        }

        // Build list items
        $subdirs = getSubdirectories($dir);
        $langPrefix = getLangPrefix($currentLang, $defaultLang);

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

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

            $baseUrl = $langPrefix . '/' . trim($requestPath, '/') . '/' . urlencode($urlSlug);

            return [
                'title' => $title,
                'date' => $date,
                'url' => $baseUrl,
                'cover' => $coverImage ? "$baseUrl/$coverImage" : null,
                'summary' => $metadata['summary'] ?? null,
                'pdf' => $pdfFile ? "$baseUrl/$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);
}