fix

lib/features/auth/presentation/utils/validators.dart

@@ -0,0 +1,86 @@
+/// Form validators for authentication
+class AuthValidators {
+  AuthValidators._();
+
+  /// Validates email format
+  static String? validateEmail(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'Email is required';
+    }
+
+    final emailRegex = RegExp(
+      r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$',
+    );
+
+    if (!emailRegex.hasMatch(value)) {
+      return 'Please enter a valid email address';
+    }
+
+    return null;
+  }
+
+  /// Validates password strength
+  /// Requirements: min 8 characters, at least one uppercase, one lowercase, one number
+  static String? validatePassword(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'Password is required';
+    }
+
+    if (value.length < 8) {
+      return 'Password must be at least 8 characters';
+    }
+
+    if (!RegExp(r'[A-Z]').hasMatch(value)) {
+      return 'Password must contain at least one uppercase letter';
+    }
+
+    if (!RegExp(r'[a-z]').hasMatch(value)) {
+      return 'Password must contain at least one lowercase letter';
+    }
+
+    if (!RegExp(r'[0-9]').hasMatch(value)) {
+      return 'Password must contain at least one number';
+    }
+
+    return null;
+  }
+
+  /// Validates name field
+  static String? validateName(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'Name is required';
+    }
+
+    if (value.length < 2) {
+      return 'Name must be at least 2 characters';
+    }
+
+    if (value.length > 50) {
+      return 'Name must not exceed 50 characters';
+    }
+
+    return null;
+  }
+
+  /// Validates password confirmation
+  static String? validateConfirmPassword(String? value, String password) {
+    if (value == null || value.isEmpty) {
+      return 'Please confirm your password';
+    }
+
+    if (value != password) {
+      return 'Passwords do not match';
+    }
+
+    return null;
+  }
+
+  /// Simple password validator for login (no strength requirements)
+  static String? validateLoginPassword(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'Password is required';
+    }
+
+    return null;
+  }
+}