test

admin-dashboard.html

@@ -1004,12 +1004,11 @@
     <div class="header">
         <div class="header-content">
             <h1>Admin Dashboard</h1>
-            <div class="admin-nav">
+            <nav class="admin-nav">
-                <a href="#aplikace" class="nav-link active" data-section="aplikace">Aplikace</a>
+                <a href="#aplikace" class="nav-link active">Aplikace</a>
-                <a href="#banner" class="nav-link" data-section="banner">Správa banneru</a>
+                <a href="#banner" class="nav-link">Správa banneru</a>
-                <a href="#rezervace" class="nav-link" data-section="rezervace">Správa rezervací</a>
+                <a href="#rezervace" class="nav-link">Správa rezervací</a>
-                <a href="#nastaveni" class="nav-link" data-section="nastaveni">Nastavení</a>
+            </nav>
-            </div>
         </div>
         <button class="logout-btn" id="logoutBtn">Odhlásit se</button>
     </div>
@@ -1063,62 +1062,7 @@
         .logout-btn:hover {
             background-color: #c0392b;
         }
-        </style>
+    </style>
-    
-    <!-- Credentials Management Section -->
-    <div class="card" style="margin: 2rem auto; max-width: 800px; display: none;" id="credentials">
-        <h3>Nastavení přihlašování</h3>
-        
-        <div id="credentialsAlert" class="hidden p-4 mb-4 rounded"></div>
-        
-        <form id="credentialsForm" class="space-y-4">
-            <div>
-                <label for="currentUsername" class="block text-sm font-medium text-gray-700">Aktuální uživatelské jméno</label>
-                <input type="text" id="currentUsername" name="currentUsername" required
-                       class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500">
-            </div>
-            
-            <div>
-                <label for="currentPassword" class="block text-sm font-medium text-gray-700">Aktuální heslo</label>
-                <input type="password" id="currentPassword" name="currentPassword" required
-                       class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500">
-            </div>
-            
-            <div class="border-t border-gray-200 pt-4">
-                <h4 class="text-md font-medium text-gray-900 mb-3">Nové přihlašovací údaje</h4>
-                
-                <div class="mb-4">
-                    <label for="newUsername" class="block text-sm font-medium text-gray-700">Nové uživatelské jméno</label>
-                    <input type="text" id="newUsername" name="newUsername" required
-                           class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500">
-                </div>
-                
-                <div class="mb-4">
-                    <label for="newPassword" class="block text-sm font-medium text-gray-700">Nové heslo</label>
-                    <input type="password" id="newPassword" name="newPassword" required minlength="8"
-                           class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500">
-                    <p class="mt-1 text-sm text-gray-500">Heslo musí mít alespoň 8 znaků</p>
-                </div>
-                
-                <div class="mb-4">
-                    <label for="confirmPassword" class="block text-sm font-medium text-gray-700">Potvrďte nové heslo</label>
-                    <input type="password" id="confirmPassword" name="confirmPassword" required minlength="8"
-                           class="mt-1 block w-full rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500">
-                </div>
-            </div>
-            
-            <div class="flex justify-end space-x-3 pt-4">
-                <button type="button" onclick="document.getElementById('credentials').style.display = 'none'" 
-                        class="px-4 py-2 border border-gray-300 rounded-md shadow-sm text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
-                    Zrušit
-                </button>
-                <button type="submit" 
-                        class="px-4 py-2 border border-transparent rounded-md shadow-sm text-sm font-medium text-white bg-blue-600 hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500">
-                    Uložit změny
-                </button>
-            </div>
-        </form>
-    </div>
     
     <div class="container">
         <h2>Vítejte v administraci</h2>
@@ -3102,163 +3046,6 @@ async function loadBanner() {
 // Add submission flag at the top of the script
 let isSubmitting = false;
 
-// Setup credentials form
-function setupCredentialsForm() {
-    const credentialsForm = document.getElementById('credentialsForm');
-    if (!credentialsForm) return;
-
-    credentialsForm.addEventListener('submit', async (e) => {
-        e.preventDefault();
-        
-        // Prevent multiple submissions
-        if (isSubmitting) return;
-        isSubmitting = true;
-        
-        const formData = new FormData(credentialsForm);
-        const currentUsername = formData.get('currentUsername');
-        const currentPassword = formData.get('currentPassword');
-        const newUsername = formData.get('newUsername');
-        const newPassword = formData.get('newPassword');
-        const confirmPassword = formData.get('confirmPassword');
-        
-        // Reset previous errors
-        document.querySelectorAll('.form-control').forEach(el => el.classList.remove('border-red-500'));
-        const alertEl = document.getElementById('credentialsAlert');
-        alertEl.classList.add('hidden');
-        
-        // Client-side validation
-        let isValid = true;
-        
-        if (!currentUsername || !currentPassword) {
-            showError('Vyplňte prosím aktuální přihlašovací údaje.');
-            isValid = false;
-        }
-        
-        if (newPassword && newPassword.length < 8) {
-            document.getElementById('newPassword').classList.add('border-red-500');
-            showError('Nové heslo musí mít alespoň 8 znaků.');
-            isValid = false;
-        }
-        
-        if (newPassword !== confirmPassword) {
-            document.getElementById('confirmPassword').classList.add('border-red-500');
-            showError('Nová hesla se neshodují.');
-            isValid = false;
-        }
-        
-        if (!isValid) {
-            isSubmitting = false;
-            return;
-        }
-        
-        // Prepare request data
-        const requestData = {
-            currentUsername,
-            currentPassword,
-            newUsername: newUsername || undefined,
-            newPassword: newPassword || undefined
-        };
-        
-        try {
-            const response = await fetch('/api/update-credentials', {
-                method: 'POST',
-                headers: {
-                    'Content-Type': 'application/json',
-                    'Authorization': `Bearer ${localStorage.getItem('token')}`
-                },
-                body: JSON.stringify(requestData)
-            });
-            
-            const data = await response.json();
-            
-            if (!response.ok) {
-                throw new Error(data.error || 'Nepodařilo se aktualizovat přihlašovací údaje');
-            }
-            
-            // Show success message
-            showSuccess('Přihlašovací údaje byly úspěšně aktualizovány. Budete odhlášeni za 3 sekundy...');
-            
-            // Logout after a delay
-            setTimeout(() => {
-                localStorage.removeItem('token');
-                window.location.href = '/login.html';
-            }, 3000);
-            
-        } catch (error) {
-            console.error('Chyba při aktualizaci přihlašovacích údajů:', error);
-            showError(error.message || 'Nastala chyba při aktualizaci přihlašovacích údajů');
-        } finally {
-            isSubmitting = false;
-        }
-    });
-    
-    function showError(message) {
-        const alertEl = document.getElementById('credentialsAlert');
-        alertEl.textContent = message;
-        alertEl.className = 'bg-red-100 border border-red-400 text-red-700 px-4 py-3 rounded relative mb-4';
-        alertEl.classList.remove('hidden');
-        alertEl.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-    }
-    
-    function showSuccess(message) {
-        const alertEl = document.getElementById('credentialsAlert');
-        alertEl.textContent = message;
-        alertEl.className = 'bg-green-100 border border-green-400 text-green-700 px-4 py-3 rounded relative mb-4';
-        alertEl.classList.remove('hidden');
-        alertEl.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-    }
-}
-
-// Setup navigation
-function setupNavigation() {
-    const navLinks = document.querySelectorAll('.nav-link');
-    const sections = document.querySelectorAll('.card[id]');
-    
-    // Show section based on hash or default to first section
-    function showSection(sectionId) {
-        // Hide all sections
-        sections.forEach(section => {
-            section.style.display = 'none';
-        });
-        
-        // Show selected section
-        const targetSection = document.getElementById(sectionId);
-        if (targetSection) {
-            targetSection.style.display = 'block';
-        } else if (sections.length > 0) {
-            // Default to first section if target not found
-            sections[0].style.display = 'block';
-        }
-        
-        // Update active nav link
-        navLinks.forEach(link => {
-            link.classList.toggle('active', link.getAttribute('data-section') === sectionId);
-        });
-        
-        // Update URL hash
-        window.location.hash = `#${sectionId}`;
-    }
-    
-    // Handle nav link clicks
-    navLinks.forEach(link => {
-        link.addEventListener('click', (e) => {
-            e.preventDefault();
-            const sectionId = link.getAttribute('data-section');
-            showSection(sectionId);
-        });
-    });
-    
-    // Handle initial load
-    const initialSection = window.location.hash ? window.location.hash.substring(1) : 'aplikace';
-    showSection(initialSection);
-    
-    // Handle browser back/forward
-    window.addEventListener('popstate', () => {
-        const sectionId = window.location.hash ? window.location.hash.substring(1) : 'aplikace';
-        showSection(sectionId);
-    });
-}
-
 async function saveBanner(event) {
     event.preventDefault();
     
@@ -4508,12 +4295,6 @@ document.addEventListener('DOMContentLoaded', function() {
     
     // Initialize banner image upload functionality
     const dragDropArea = document.getElementById('dragDropArea');
-    
-    // Initialize credentials form
-    setupCredentialsForm();
-    
-    // Navigation handling
-    setupNavigation();
     const uploadImageBtn = document.getElementById('uploadImageBtn');
     const bannerImageInput = document.getElementById('bannerImage');
     

auth.go

@@ -7,7 +7,6 @@ import (
 	"net/http"
 	"os"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/golang-jwt/jwt/v5"
@@ -19,17 +18,6 @@ type Credentials struct {
 	Password string `json:"password"`
 }
 
-type UpdateCredentialsRequest struct {
-	CurrentUsername string `json:"currentUsername"`
-	CurrentPassword string `json:"currentPassword"`
-	NewUsername     string `json:"newUsername"`
-	NewPassword     string `json:"newPassword"`
-}
-
-type CredentialsResponse struct {
-	IsDefaultCredentials bool `json:"isDefaultCredentials"`
-}
-
 type Claims struct {
 	Username string `json:"username"`
 	jwt.RegisteredClaims
@@ -39,17 +27,9 @@ var (
 	// In production, use environment variable for JWT key
 	jwtKey = getJWTKey()
 
-	// Default credentials
+	adminUsername = "admin"
-	defaultUsername     = "admin"
+	// In a real app, store hashed password and retrieve from a secure storage
-	defaultPassword     = "admin"
+	adminPasswordHash = mustHashPassword("admin") // Default password, should be changed after first login
-	defaultPasswordHash = mustHashPassword(defaultPassword)
-
-	// Current credentials (in-memory, would be from DB in production)
-	adminUsername     = defaultUsername
-	adminPasswordHash = defaultPasswordHash
-
-	// Mutex for thread-safe credential updates
-	credentialsMutex sync.RWMutex
 )
 
 func getJWTKey() []byte {
@@ -68,36 +48,32 @@ func mustHashPassword(password string) string {
 	return string(hash)
 }
 
-func authenticateUser(creds Credentials) (string, bool, error) {
+func authenticateUser(creds Credentials) (string, error) {
-	credentialsMutex.RLock()
+	// In a real app, verify against a database
-	defer credentialsMutex.RUnlock()
-
 	if creds.Username != adminUsername {
-		return "", false, errors.New("invalid credentials")
+		return "", errors.New("invalid credentials")
 	}
 
 	if err := bcrypt.CompareHashAndPassword([]byte(adminPasswordHash), []byte(creds.Password)); err != nil {
-		return "", false, errors.New("invalid credentials")
+		return "", errors.New("invalid credentials")
 	}
 
-	// Check if using default credentials
+	// Create JWT token
-	isDefault := creds.Username == defaultUsername && bcrypt.CompareHashAndPassword(
-		[]byte(defaultPasswordHash), []byte(creds.Password)) == nil
-
-	tokenString, err := createToken(creds.Username)
-	return tokenString, isDefault, err
-}
-
-func createToken(username string) (string, error) {
 	expirationTime := time.Now().Add(24 * time.Hour)
 	claims := &Claims{
-		Username: username,
+		Username: creds.Username,
 		RegisteredClaims: jwt.RegisteredClaims{
 			ExpiresAt: jwt.NewNumericDate(expirationTime),
 		},
 	}
+
 	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
-	return token.SignedString(jwtKey)
+	tokenString, err := token.SignedString(jwtKey)
+	if err != nil {
+		return "", err
+	}
+
+	return tokenString, nil
 }
 
 func verifyToken(tokenString string) (*Claims, error) {
@@ -150,63 +126,27 @@ func AuthMiddleware(next http.Handler) http.Handler {
 	})
 }
 
-// LoginHandler handles user login
 func LoginHandler(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodPost {
-		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		http.Error(w, `{"error":"Method not allowed"}`, http.StatusMethodNotAllowed)
 		return
 	}
 
 	var creds Credentials
-	if err := json.NewDecoder(r.Body).Decode(&creds); err != nil {
+	err := json.NewDecoder(r.Body).Decode(&creds)
-		http.Error(w, "Invalid request body", http.StatusBadRequest)
-		return
-	}
-
-	tokenString, isDefault, err := authenticateUser(creds)
 	if err != nil {
-		http.Error(w, "Invalid credentials", http.StatusUnauthorized)
+		http.Error(w, `{"error":"Invalid request body"}`, http.StatusBadRequest)
+		return
+	}
+
+	token, err := authenticateUser(creds)
+	if err != nil {
+		http.Error(w, `{"error":"Invalid credentials"}`, http.StatusUnauthorized)
 		return
 	}
 
 	w.Header().Set("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(map[string]interface{}{
+	json.NewEncoder(w).Encode(map[string]string{
-		"token":               tokenString,
+		"token": token,
-		"isDefaultCredentials": isDefault,
-	})
-}
-
-// UpdateCredentialsHandler handles credential updates
-func UpdateCredentialsHandler(w http.ResponseWriter, r *http.Request) {
-	if r.Method != http.MethodPost {
-		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
-		return
-	}
-
-	var updateCreds UpdateCredentialsRequest
-	if err := json.NewDecoder(r.Body).Decode(&updateCreds); err != nil {
-		http.Error(w, "Invalid request body", http.StatusBadRequest)
-		return
-	}
-
-	// Authenticate current credentials
-	if _, _, err := authenticateUser(Credentials{
-		Username: updateCreds.CurrentUsername,
-		Password: updateCreds.CurrentPassword,
-	}); err != nil {
-		http.Error(w, "Invalid current credentials", http.StatusUnauthorized)
-		return
-	}
-
-	// Update credentials
-	credentialsMutex.Lock()
-	defer credentialsMutex.Unlock()
-
-	adminUsername = updateCreds.NewUsername
-	adminPasswordHash = mustHashPassword(updateCreds.NewPassword)
-
-	w.Header().Set("Content-Type", "application/json")
-	json.NewEncoder(w).Encode(map[string]bool{
-		"success": true,
 	})
 }

main.go

@@ -141,7 +141,6 @@ func main() {
 
 	// Authentication routes
 	r.HandleFunc("/api/login", LoginHandler).Methods("POST", "OPTIONS")
-	r.HandleFunc("/api/update-credentials", UpdateCredentialsHandler).Methods("POST", "OPTIONS")
 
 	// Public endpoints (must be defined before protected ones)
 	r.HandleFunc("/api/banner", GetBannerHandler).Methods("GET", "OPTIONS")