new frontend

backend/cmd/server/main.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"path/filepath"
 	"strconv"
 	"strings"
 	"time"
@@ -358,39 +359,9 @@ func main() {
 	admin.HandleFunc("/auth/providers/{providerId}", authHandler.UpdateProvider).Methods("PUT")
 	admin.HandleFunc("/auth/providers/{providerId}", adminHandler.DeleteProvider).Methods("DELETE")
 
-	// Serve static files (frontend) for all other routes
-	// This must be after all API route handlers to allow API routes to take precedence
-	router.PathPrefix("/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		// List of static file extensions to serve directly
-		staticExts := map[string]bool{
-			".js": true, ".css": true, ".svg": true, ".png": true,
-			".jpg": true, ".jpeg": true, ".gif": true, ".ico": true,
-			".woff": true, ".woff2": true, ".ttf": true, ".eot": true,
-		}
-
-		filePath := "./public" + r.URL.Path
-		if r.URL.Path == "/" {
-			filePath = "./public/index.html"
-		}
-
-		// Check if it's a static file (has an extension in staticExts)
-		isStatic := false
-		for ext := range staticExts {
-			if len(r.URL.Path) > len(ext) {
-				if r.URL.Path[len(r.URL.Path)-len(ext):] == ext {
-					isStatic = true
-					break
-				}
-			}
-		}
-
-		// If it doesn't look like a static file, serve index.html (SPA routing)
-		if !isStatic {
-			filePath = "./public/index.html"
-		}
-
-		http.ServeFile(w, r, filePath)
-	})
+	// Serve static files (NextJS frontend) for all other routes.
+	// Must come after all API route handlers.
+	router.PathPrefix("/").HandlerFunc(serveNextJS)
 
 	// Start server
 	server := &http.Server{
@@ -529,3 +500,107 @@ func ensureDefaultAdminUser(
 	log.Printf("default admin user synchronized from environment: %s", adminEmail)
 	return nil
 }
+
+// serveNextJS serves the NextJS static export from ./public.
+// It handles /_next/ assets directly, tries {path}/index.html for page routes,
+// and falls back to dynamic route pattern matching (NextJS [param] folders).
+func serveNextJS(w http.ResponseWriter, r *http.Request) {
+	const publicDir = "./public"
+	urlPath := r.URL.Path
+
+	// ── /_next/ and other static assets ─────────────────────────────────────
+	if strings.HasPrefix(urlPath, "/_next/") {
+		http.ServeFile(w, r, filepath.Join(publicDir, filepath.FromSlash(urlPath)))
+		return
+	}
+
+	staticExts := []string{
+		".js", ".css", ".svg", ".png", ".jpg", ".jpeg", ".gif", ".ico",
+		".woff", ".woff2", ".ttf", ".eot", ".json", ".map", ".txt", ".xml",
+	}
+	for _, ext := range staticExts {
+		if strings.HasSuffix(urlPath, ext) {
+			http.ServeFile(w, r, filepath.Join(publicDir, filepath.FromSlash(urlPath)))
+			return
+		}
+	}
+
+	// ── HTML page resolution ─────────────────────────────────────────────────
+	// NextJS static export with trailingSlash:true produces {path}/index.html
+	cleanPath := strings.TrimRight(urlPath, "/")
+	if cleanPath == "" {
+		cleanPath = "/"
+	}
+
+	// 1. Try exact {path}/index.html
+	candidate := filepath.Join(publicDir, filepath.FromSlash(cleanPath), "index.html")
+	if _, err := os.Stat(candidate); err == nil {
+		http.ServeFile(w, r, candidate)
+		return
+	}
+
+	// 2. Try {path}.html
+	candidate = filepath.Join(publicDir, filepath.FromSlash(cleanPath)+".html")
+	if _, err := os.Stat(candidate); err == nil {
+		http.ServeFile(w, r, candidate)
+		return
+	}
+
+	// 3. Walk path segments and try NextJS dynamic [param] folders
+	segments := strings.Split(strings.Trim(cleanPath, "/"), "/")
+	if result := findNextJSPage(publicDir, segments); result != "" {
+		http.ServeFile(w, r, result)
+		return
+	}
+
+	// 4. Fallback: root index.html
+	http.ServeFile(w, r, filepath.Join(publicDir, "index.html"))
+}
+
+// findNextJSPage recursively searches the public directory for an HTML file
+// that matches the given URL segments, replacing unknown segments with any
+// NextJS dynamic directory ([param] named folders).
+func findNextJSPage(publicDir string, segments []string) string {
+	return searchNextJSSegments(publicDir, segments, 0, publicDir)
+}
+
+func searchNextJSSegments(publicDir string, segments []string, idx int, currentDir string) string {
+	if idx == len(segments) {
+		candidate := filepath.Join(currentDir, "index.html")
+		if _, err := os.Stat(candidate); err == nil {
+			return candidate
+		}
+		return ""
+	}
+
+	seg := segments[idx]
+
+	// Try the exact segment directory
+	exactDir := filepath.Join(currentDir, seg)
+	if result := searchNextJSSegments(publicDir, segments, idx+1, exactDir); result != "" {
+		return result
+	}
+
+	// Try NextJS dynamic segment directories.
+	// Matches both [param] (source convention) and __param__ (static export convention).
+	entries, err := os.ReadDir(currentDir)
+	if err != nil {
+		return ""
+	}
+	for _, entry := range entries {
+		name := entry.Name()
+		if !entry.IsDir() {
+			continue
+		}
+		isBracket := len(name) > 2 && name[0] == '[' && name[len(name)-1] == ']'
+		isPlaceholder := len(name) >= 4 && strings.HasPrefix(name, "__") && strings.HasSuffix(name, "__")
+		if isBracket || isPlaceholder {
+			dynamicDir := filepath.Join(currentDir, name)
+			if result := searchNextJSSegments(publicDir, segments, idx+1, dynamicDir); result != "" {
+				return result
+			}
+		}
+	}
+
+	return ""
+}