Add automatic page title linking functionality

- Added autoLinkPageTitles() function to link page titles
- Added getAllPageTitles() to scan all content pages
- Added extractPageTitle() for MD/PHP/HTML files
- Added CSS styling for auto-links with dotted underline
- Page titles in content now automatically link to their pages
- Prevents linking inside existing HTML tags and links

index.php

@@ -219,6 +219,9 @@ class CodePressCMS {
         $body = preg_replace('/href="\/blog\/([^"]+)"/', 'href="?page=blog/$1"', $body);
         $body = preg_replace('/href="\/([^"]+)"/', 'href="?page=$1"', $body);
         
+        // Auto-link page titles to existing content pages
+        $body = $this->autoLinkPageTitles($body);
+        
         $body = preg_replace('/\n\n/', '</p><p>', $body);
         $body = '<p>' . $body . '</p>';
         $body = preg_replace('/<p><\/p>/', '', $body);
@@ -231,6 +234,88 @@ class CodePressCMS {
         ];
     }
     
+    private function autoLinkPageTitles($content) {
+        // Get all available pages with their titles
+        $pages = $this->getAllPageTitles();
+        
+        foreach ($pages as $pagePath => $pageTitle) {
+            // Create a pattern that matches the exact page title (case-insensitive)
+            $pattern = '/\b' . preg_quote($pageTitle, '/') . '\b/i';
+            
+            // Replace with link, but avoid linking inside existing links or headings
+            $replacement = function($matches) use ($pageTitle, $pagePath) {
+                // Check if we're inside an HTML tag or link
+                $before = substr($matches[0], 0, 50);
+                if (preg_match('/<[^>]*$/', $before) || preg_match('/href=/', $before)) {
+                    return $matches[0]; // Don't link inside HTML tags
+                }
+                
+                return '<a href="?page=' . $pagePath . '" class="auto-link" title="Ga naar ' . htmlspecialchars($pageTitle) . '">' . $matches[0] . '</a>';
+            };
+            
+            $content = preg_replace_callback($pattern, $replacement, $content);
+        }
+        
+        return $content;
+    }
+    
+    private function getAllPageTitles() {
+        $pages = [];
+        $this->scanForPageTitles($this->config['content_dir'], '', $pages);
+        return $pages;
+    }
+    
+    private function scanForPageTitles($dir, $prefix, &$pages) {
+        if (!is_dir($dir)) return;
+        
+        $items = scandir($dir);
+        sort($items);
+        
+        foreach ($items as $item) {
+            if ($item[0] === '.') continue;
+            
+            $path = $dir . '/' . $item;
+            $relativePath = $prefix ? $prefix . '/' . $item : $item;
+            
+            if (is_dir($path)) {
+                $this->scanForPageTitles($path, $relativePath, $pages);
+            } elseif (preg_match('/\.(md|php|html)$/', $item)) {
+                $title = $this->extractPageTitle($path);
+                if ($title && !empty(trim($title))) {
+                    $pagePath = preg_replace('/\.[^.]+$/', '', $relativePath);
+                    $pages[$pagePath] = $title;
+                }
+            }
+        }
+    }
+    
+    private function extractPageTitle($filePath) {
+        $content = file_get_contents($filePath);
+        $extension = pathinfo($filePath, PATHINFO_EXTENSION);
+        
+        if ($extension === 'md') {
+            // Extract first H1 from Markdown
+            if (preg_match('/^#\s+(.+)$/m', $content, $matches)) {
+                return trim($matches[1]);
+            }
+        } elseif ($extension === 'php') {
+            // Extract title from PHP file
+            if (preg_match('/\$title\s*=\s*["\']([^"\']+)["\']/', $content, $matches)) {
+                return trim($matches[1]);
+            }
+        } elseif ($extension === 'html') {
+            // Extract title from HTML file
+            if (preg_match('/<title>(.*?)<\/title>/i', $content, $matches)) {
+                return trim(strip_tags($matches[1]));
+            }
+            if (preg_match('/<h1[^>]*>(.*?)<\/h1>/i', $content, $matches)) {
+                return trim(strip_tags($matches[1]));
+            }
+        }
+        
+        return null;
+    }
+    
     private function parsePHP($filePath) {
         ob_start();
         $title = 'Untitled';

templates/layout.html

@@ -162,6 +162,17 @@
         .site-info a:hover {
             text-decoration: underline;
         }
+        .auto-link {
+            color: #0d6efd;
+            text-decoration: none;
+            border-bottom: 1px dotted #0d6efd;
+            font-weight: 500;
+        }
+        .auto-link:hover {
+            color: #0a58ca;
+            text-decoration: none;
+            border-bottom-style: solid;
+        }
         .search-form {
             max-width: 300px;
         }