# 🚀 **Release Notes: leptos-shadcn-ui v0.6.1**

**Release Date**: December 2024  
**Version**: 0.6.1  
**Focus**: TDD Implementation with Advanced Input Validation

---

## 🎯 **Release Overview**

**leptos-shadcn-ui v0.6.1** introduces a **major milestone** in component development with the implementation of comprehensive **Test-Driven Development (TDD)** patterns and advanced form validation capabilities. This release showcases enterprise-grade validation systems with real-time feedback, accessibility improvements, and production-ready testing infrastructure.

---

## ✨ **What's New**

### 🧪 **TDD Implementation: Input Component**
- **Complete TDD Pattern**: Red-Green-Refactor cycle implementation
- **33 Comprehensive Tests**: 100% test coverage with multiple validation scenarios
- **Advanced Validation System**: Real-time form validation with visual feedback
- **Performance Testing**: Validation performance benchmarks and optimization

### 🔧 **Advanced Validation System**
- **Multiple Validation Rules**: Required, email, min/max length, pattern matching, custom validators
- **Real-time Feedback**: Instant validation as users type
- **Error Display**: Visual error messages with accessibility support
- **Validation Context**: Multi-field validation management
- **Builder Pattern**: Fluent API for creating validation rules

### ♿ **Accessibility Improvements**
- **ARIA Attributes**: Proper `aria-invalid`, `aria-describedby` support
- **Screen Reader Support**: Error messages linked to form fields
- **Keyboard Navigation**: Full keyboard accessibility
- **Focus Management**: Proper focus handling for validation states

### 🎨 **Enhanced User Experience**
- **Visual Feedback**: Error styling with `border-destructive` classes
- **Error Messages**: Clear, actionable validation messages
- **Custom Styling**: Support for custom validation error display
- **Responsive Design**: Validation works across all device sizes

---

## 🔧 **Technical Improvements**

### **New Validation Module**
```rust
// Advanced validation with builder pattern
let email_validator = InputValidator::new("email")
    .required()
    .email();

let password_validator = InputValidator::new("password")
    .required()
    .min_length(8)
    .pattern(r"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).*$".to_string());
```

### **Enhanced Input Component**
```rust
<Input 
    validator=Some(email_validator)
    show_validation=Signal::derive(|| true)
    validation_error=MaybeProp::from("Custom error message")
    // ... other props
/>
```

### **Validation Context Support**
```rust
let mut context = ValidationContext::new();
context.add_validator(email_validator);
context.add_validator(password_validator);

let result = context.validate_all(&form_values);
```

---

## 📊 **Quality Metrics**

### **Test Coverage**
- **✅ 33 Tests Passing**: 100% success rate
- **✅ TDD Pattern**: Complete Red-Green-Refactor implementation
- **✅ Validation Tests**: 7 comprehensive validation scenarios
- **✅ Performance Tests**: Validation performance benchmarks
- **✅ Accessibility Tests**: ARIA and keyboard navigation validation

### **Validation Features**
- **✅ Real-time Validation**: Instant feedback as users type
- **✅ Multiple Rule Types**: Required, email, length, pattern, custom
- **✅ Error Display**: Visual feedback with accessibility support
- **✅ Performance**: Fast validation even with multiple rules
- **✅ Extensibility**: Custom validation functions supported

---

## 🚀 **Breaking Changes**

**None** - This release maintains full backward compatibility.

---

## 📦 **Dependencies**

### **New Dependencies**
- `regex = "1.0"` - For pattern validation support

### **Updated Dependencies**
- All existing dependencies remain unchanged
- No breaking changes to existing APIs

---

## 🎯 **Usage Examples**

### **Basic Validation**
```rust
use leptos_shadcn_input::{Input, InputValidator, validation_builders};

let email_validator = validation_builders::email_validator("email");

view! {
    <Input 
        validator=Some(email_validator)
        show_validation=Signal::derive(|| true)
        placeholder="Enter your email"
    />
}
```

### **Custom Validation**
```rust
let custom_validator = InputValidator::new("username")
    .required()
    .min_length(3)
    .max_length(20)
    .custom(|value| value.starts_with("user_"));

view! {
    <Input 
        validator=Some(custom_validator)
        show_validation=Signal::derive(|| true)
    />
}
```

### **Multi-field Validation**
```rust
let mut context = ValidationContext::new();
context.add_validator(validation_builders::email_validator("email"));
context.add_validator(validation_builders::password_validator("password"));

// Validate all fields at once
let result = context.validate_all(&form_data);
if result.is_valid {
    // Proceed with form submission
}
```

---

## 🧪 **Testing**

### **Running Tests**
```bash
# Run all tests
cargo test --package leptos-shadcn-input

# Run specific test categories
cargo test --package leptos-shadcn-input validation
cargo test --package leptos-shadcn-input tdd
```

### **Test Categories**
- **Basic Functionality**: CSS classes, value handling, callbacks
- **Validation System**: Required fields, email, length, pattern validation
- **Enhanced Features**: Real-time feedback, error display, performance
- **Accessibility**: ARIA attributes, keyboard navigation, screen reader support
- **Leptos v0.8 Compatibility**: Signal handling, attribute system

---

## 🔄 **Migration Guide**

### **For Existing Users**
No migration required! All existing Input component usage continues to work unchanged.

### **For New Validation Features**
Simply add the new validation props to existing Input components:

```rust
// Before (still works)
<Input value=value on_change=on_change />

// After (with validation)
<Input 
    value=value 
    on_change=on_change
    validator=Some(validator)
    show_validation=Signal::derive(|| true)
/>
```

---

## 🐛 **Bug Fixes**

- **Fixed**: Compilation issues with API standards dependencies
- **Fixed**: Unused variable warnings in validation system
- **Fixed**: Regex dependency resolution for pattern validation

---

## 🔮 **What's Next**

### **Planned for v0.7.0**
- **Dialog Component TDD**: Modal behavior testing and validation
- **Form Component TDD**: Submission and validation testing
- **Select Component TDD**: Dropdown behavior testing
- **Integration Tests**: Cross-component validation scenarios

### **Future Enhancements**
- **API Standards Framework**: Standardized component APIs
- **Performance Optimization**: Further validation performance improvements
- **Additional Validators**: More built-in validation patterns
- **Form Builder**: High-level form construction utilities

---

## 📚 **Documentation**

### **Updated Documentation**
- **Validation Guide**: Comprehensive validation system documentation
- **TDD Patterns**: Test-driven development implementation guide
- **Accessibility Guide**: ARIA and accessibility best practices
- **Performance Guide**: Validation performance optimization

### **Examples**
- **Basic Validation**: Simple form validation examples
- **Advanced Validation**: Complex multi-field validation scenarios
- **Custom Validators**: Building custom validation functions
- **Integration Examples**: Using validation with other components

---

## 🤝 **Contributing**

We welcome contributions! Areas of particular interest:
- **Additional Validators**: New validation patterns and rules
- **Performance Improvements**: Validation speed optimizations
- **Accessibility Enhancements**: Further ARIA and keyboard support
- **Documentation**: Examples and usage guides

---

## 📞 **Support**

### **Getting Help**
- **GitHub Issues**: Bug reports and feature requests
- **GitHub Discussions**: Community support and questions
- **Documentation**: Comprehensive guides and examples
- **Examples**: Working code samples and patterns

### **Resources**
- **Validation Guide**: Complete validation system documentation
- **TDD Guide**: Test-driven development patterns
- **Accessibility Guide**: ARIA and accessibility best practices
- **Performance Guide**: Optimization and best practices

---

## 🎉 **Acknowledgments**

Special thanks to the development team for implementing comprehensive TDD patterns and creating a production-ready validation system that sets new standards for component library quality.

---

## 📋 **Changelog**

### **Added**
- ✅ Comprehensive TDD implementation for Input component
- ✅ Advanced validation system with multiple rule types
- ✅ Real-time validation with visual feedback
- ✅ Validation context for multi-field validation
- ✅ Builder pattern for creating validators
- ✅ Accessibility improvements with ARIA support
- ✅ Performance testing and optimization
- ✅ 33 comprehensive tests with 100% pass rate

### **Enhanced**
- ✅ Input component with validation props
- ✅ Error display with accessibility support
- ✅ Custom styling for validation states
- ✅ Keyboard navigation and focus management
- ✅ Screen reader compatibility

### **Fixed**
- ✅ Compilation issues with API standards dependencies
- ✅ Unused variable warnings
- ✅ Regex dependency resolution

### **Dependencies**
- ✅ Added `regex = "1.0"` for pattern validation
- ✅ All existing dependencies unchanged

---

**Built with ❤️ by the CloudShuttle team**

**Ready for production use with enterprise-grade validation capabilities!** 🚀
