# Tender Management System

A comprehensive tender management backend system built with Go, following Clean Architecture principles with Domain-Driven Design (DDD) patterns.

## 📚 Documentation

All documentation has been organized in the [`docs/`](./docs/) directory for better structure and maintainability.

### Quick Links
- **[📖 Main Documentation](./docs/README.md)** - Comprehensive project overview and guidelines
- **[🔧 Setup Guides](./docs/setup/)** - HTTP server and Swagger setup
- **[🚀 Implementation Details](./docs/implementation/)** - Architecture and implementation overview
- **[📡 API Examples](./docs/examples/)** - API usage examples and endpoints

## 🚀 Quick Start

1. **Setup Environment**
   ```bash
   # Follow setup guides in docs/setup/
   ```

2. **Run the Application**
   ```bash
   make run
   ```

3. **Access API Documentation**
   - Swagger UI: `http://localhost:8081/swagger/index.html`
   - API Base URL: `http://localhost:8081/api/v1`

## 🏗️ Architecture

This system implements **Clean Architecture** with:
- **Domain Layer**: Business entities and core rules
- **Service Layer**: Business logic and use cases
- **Handler Layer**: HTTP controllers and request handling
- **Repository Layer**: Data access implementations
- **Infrastructure Layer**: External dependencies

## 📋 Key Features

- **Clean Architecture**: DDD principles with clear separation of concerns
- **MongoDB Integration**: Robust data persistence with proper indexing
- **Structured Logging**: Comprehensive logging with context
- **Input Validation**: Govalidator integration for request validation
- **Error Handling**: Consistent error responses and logging
- **Time Handling**: Unix timestamps throughout the application
- **Generic XML Parser**: Parse any XML structure into Go structs using generics

## 🚧 Phase 1 Implementation Status

**Current Completion: 70-75%** - The foundation is excellent with TED integration, company management, and admin panel. Critical gaps exist in mobile app features and feedback system.

### ✅ **Completed Features (100%)**

#### 1. **TED Integration**
- ✅ TED XML Bulk Import with comprehensive parser
- ✅ XML Parser supporting all TED notice types
- ✅ Complete data storage with all required fields
- ✅ Unique tender ID generation system
- ✅ Submission deadline calculation (2 weeks before notice)
- ✅ Source tracking and metadata management

#### 2. **Company Profile Management**
- ✅ Username & password authentication system
- ✅ Complete tags system (CPV codes, categories, keywords)
- ✅ Company verification and compliance tracking
- ✅ Address and contact information management

#### 3. **Admin Panel (Web)**
- ✅ Complete company CRUD operations
- ✅ User management and authentication
- ✅ Tag assignment and management
- ✅ Tender management and search
- ✅ Scraping job control and monitoring

### 🔄 **Partially Implemented (60-80%)**

#### 4. **Tender Matching Logic**
- ✅ Basic CPV code matching algorithm
- ✅ Category tags structure
- ❌ Abstract text relevance analysis
- ✅ Basic match percentage calculation

#### 5. **Mobile App Backend**
- ✅ Authentication system (login/logout)
- ✅ Basic tender access endpoints
- ❌ Advanced filtering capabilities
- ❌ Comprehensive search functionality
- ❌ Like/Dislike feedback system

### ❌ **Missing Features (0%)**

#### 6. **Feedback System**
- ❌ Like/Dislike functionality
- ❌ Interest tracking and history
- ❌ Company-tender feedback relationships

#### 7. **Advanced Mobile Features**
- ❌ Comprehensive filtering (date, status, location)
- ❌ Advanced search (title, abstract, buyer)
- ❌ Detailed tender information endpoints
- ❌ Feedback and rating system

## 📋 **TODO List - Phase 1 Completion**

### 🔴 **High Priority - Critical Features**

#### 1. **Feedback System Implementation**
- [ ] Create new domain `internal/feedback/`
- [ ] Implement `TenderFeedback` entity
- [ ] Add repository for feedback storage
- [ ] Implement feedback management service
- [ ] Add API endpoints for like/dislike
- [ ] Implement authentication middleware for feedback

#### 2. **Enhanced Tender Matching Algorithm**
- [ ] Improve `CalculateMatchPercentage` function
- [ ] Add abstract text analysis for relevance scoring
- [ ] Implement matching based on keywords and specializations
- [ ] Add weighting system for different match criteria
- [ ] Optimize matching algorithm performance

#### 3. **Database Optimization**
- [ ] Create indexes for search fields in MongoDB
- [ ] Add compound indexes for complex queries
- [ ] Optimize queries for better performance
- [ ] Add text indexes for text search

### 🟡 **Medium Priority - Mobile Features**

#### 4. **Advanced Mobile APIs**
- [ ] Add endpoint for company-matched tenders
- [ ] Implement advanced filtering (date, status, location)
- [ ] Add search by title and abstract
- [ ] Implement pagination for long lists
- [ ] Add sorting by match percentage and date

#### 5. **Advanced Filtering System**
- [ ] Filter by deadline time range
- [ ] Filter by tender status
- [ ] Filter by country and region
- [ ] Filter by tender type
- [ ] Filter by estimated value
- [ ] Filter by CPV codes

#### 6. **Advanced Search System**
- [ ] Search in tender titles
- [ ] Search in abstract text
- [ ] Search in buyer organization names
- [ ] Combined search (title + text + location)
- [ ] Fuzzy search for better results

### 🟢 **Low Priority - Enhancements**

#### 7. **Recommendation System**
- [ ] Implement recommendation algorithm based on feedback history
- [ ] Add "similar tenders" based on CPV codes
- [ ] Implement "suggested tenders" for companies
- [ ] Add scoring system for prioritization

#### 8. **Analytics and Reporting**
- [ ] Add feedback statistics to admin panel
- [ ] Report companies with most feedback activity
- [ ] Statistics on popular and unpopular tenders
- [ ] Company matching effectiveness reports

#### 9. **Performance Optimization**
- [ ] Add caching for matching results
- [ ] Optimize queries using aggregation pipelines
- [ ] Implement background jobs for match calculations
- [ ] Add rate limiting for APIs

### 🔧 **Testing and Documentation**

#### 10. **Testing**
- [ ] Write unit tests for feedback system
- [ ] Integration tests for new APIs
- [ ] Performance tests for matching algorithm
- [ ] Load tests for mobile endpoints

#### 11. **Documentation**
- [ ] Update Swagger documentation
- [ ] API documentation for mobile
- [ ] Implementation guide for feedback system
- [ ] Matching algorithm documentation

### 📱 **Mobile-Specific Features**

#### 12. **Authentication and Security**
- [ ] Improve JWT token management
- [ ] Add refresh token rotation
- [ ] Implement rate limiting for login attempts
- [ ] Add device tracking

#### 13. **Push Notifications**
- [ ] Implement notification system for new tenders
- [ ] Notifications for high-match tenders
- [ ] Deadline approaching notifications
- [ ] Personalized notification settings

### 🗄️ **Data Management**

#### 14. **Data Migration**
- [ ] Migration scripts for new tables
- [ ] Update existing schemas
- [ ] Data cleanup and validation
- [ ] Backup and restore procedures

#### 15. **Monitoring and Logging**
- [ ] Add metrics for feedback system
- [ ] Logging for matching operations
- [ ] Alerting for critical errors
- [ ] Performance monitoring

## 📊 **Project Status Summary**

- **Completed**: 70-75%
- **In Progress**: 0%
- **Remaining**: 25-30%

## ⏱️ **Estimated Completion Time**

- **High Priority**: 2-3 weeks
- **Medium Priority**: 3-4 weeks
- **Low Priority**: 2-3 weeks
- **Total Estimated Time**: 7-10 weeks

## 🚀 **Next Steps**

To complete Phase 1, start with the **Feedback System** implementation because:
1. It's the foundation for other features
2. Has lower complexity
3. Directly impacts user experience

## 🔧 New Features

### Generic XML Parser

A powerful, generic XML parser built with Go generics that can parse any XML structure into Go structs. Perfect for handling complex XML formats like TED (Tenders Electronic Daily) notices.

#### Features
- **Generic Support**: Parse any XML structure that implements the `Parseable` interface
- **Flexible Configuration**: Customizable parsing options for different use cases
- **Built-in Validation**: Automatic validation of parsed structures
- **Metadata Extraction**: Extract XML metadata and parsing information
- **TED XML Support**: Pre-built models for TED contract notices
- **Error Reporting**: Detailed error and warning reporting

#### Quick Example
```go
// Define your XML structure
type Contract struct {
    XMLName xml.Name `xml:"Contract"`
    ID      string   `xml:"id,attr"`
    Name    string   `xml:"name"`
    Value   string   `xml:"value"`
}

func (c Contract) Validate() error { /* validation logic */ }
func (c Contract) GetID() string { return c.ID }

// Parse XML
parser := xmlparser.NewParser[Contract](nil)
contract, err := parser.ParseString(xmlData)
```

See [pkg/xmlparser/README.md](pkg/xmlparser/README.md) for complete documentation and examples.

## 📦 Package Structure

```
├── cmd/                    # Application entry points
├── internal/               # Private application code
│   ├── company/           # Company domain
│   ├── customer/          # Customer domain
│   └── user/              # User domain
├── pkg/                   # Public packages
│   ├── authorization/     # Authorization utilities
│   ├── logger/           # Structured logging
│   ├── mongo/            # MongoDB utilities
│   ├── redis/            # Redis utilities
│   ├── response/         # HTTP response utilities
│   └── xmlparser/        # Generic XML parser
├── infra/                # Infrastructure configuration
└── docs/                 # Documentation
```

## 🧪 Testing

```bash
# Run all tests
make test

# Test specific package
go test ./pkg/xmlparser/...

# Test with coverage
make test-coverage
```

## 🛠️ Development

### Prerequisites
- Go 1.23+
- MongoDB
- Redis (optional)

### Local Development
```bash
# Clone repository
git clone <repository-url>
cd tm_back

# Install dependencies
go mod tidy

# Run tests
make test

# Start development server
make dev
```

### Adding New Features
1. Follow Clean Architecture principles
2. Implement proper logging in service layer
3. Add comprehensive validation
4. Write unit tests
5. Update documentation

## 📝 Contributing

1. Fork the repository
2. Create a feature branch
3. Follow coding standards
4. Add tests for new features
5. Update documentation
6. Submit a pull request

## 📄 License

This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.