Files
TimeTracker/app/services/expense_service.py
T
Dries Peeters 9d1ece5263 feat: Implement comprehensive architectural improvements and new features
This commit implements a complete architectural transformation of the TimeTracker
application, introducing modern design patterns and comprehensive feature set.

## Architecture Improvements

### Service Layer (18 Services)
- TimeTrackingService: Time entry management with timer functionality
- ProjectService: Project operations and lifecycle management
- InvoiceService: Invoice creation, management, and status tracking
- TaskService: Task management and workflow
- ExpenseService: Expense tracking and categorization
- ClientService: Client relationship management
- PaymentService: Payment processing and invoice reconciliation
- CommentService: Comment system for projects, tasks, and quotes
- UserService: User management and role operations
- NotificationService: Notification delivery system
- ReportingService: Report generation and analytics
- AnalyticsService: Event tracking and analytics
- ExportService: CSV export functionality
- ImportService: CSV import with validation
- EmailService: Email operations and invoice delivery
- PermissionService: Role-based permission management
- BackupService: Database backup operations
- HealthService: System health checks and monitoring

### Repository Layer (9 Repositories)
- BaseRepository: Generic CRUD operations
- TimeEntryRepository: Time entry data access
- ProjectRepository: Project data access with filtering
- InvoiceRepository: Invoice queries and status management
- TaskRepository: Task data access
- ExpenseRepository: Expense data access
- ClientRepository: Client data access
- UserRepository: User data access
- PaymentRepository: Payment data access
- CommentRepository: Comment data access

### Schema Layer (9 Schemas)
- Marshmallow schemas for validation and serialization
- Create, update, and full schemas for all entities
- Input validation and data transformation

### Utility Modules (15 Utilities)
- api_responses: Standardized API response helpers
- validation: Input validation utilities
- query_optimization: N+1 query prevention and eager loading
- error_handlers: Centralized error handling
- cache: Caching foundation (Redis-ready)
- transactions: Transaction management decorators
- event_bus: Domain event system
- performance: Performance monitoring decorators
- logger: Enhanced structured logging
- pagination: Pagination utilities
- file_upload: Secure file upload handling
- search: Full-text search utilities
- rate_limiting: Rate limiting helpers
- config_manager: Configuration management
- datetime_utils: Enhanced date/time utilities

## Database Improvements
- Performance indexes migration (15+ indexes)
- Query optimization utilities
- N+1 query prevention patterns

## Testing Infrastructure
- Comprehensive test fixtures (conftest.py)
- Service layer unit tests
- Repository layer unit tests
- Integration test examples

## CI/CD Pipeline
- GitHub Actions workflow
- Automated linting (Black, Flake8, Pylint)
- Security scanning (Bandit, Safety, Semgrep)
- Automated testing with coverage
- Docker image builds

## Documentation
- Architecture migration guide
- Quick start guide
- API enhancements documentation
- Implementation summaries
- Refactored route examples

## Key Benefits
- Separation of concerns: Business logic decoupled from routes
- Testability: Services and repositories can be tested in isolation
- Maintainability: Consistent patterns across codebase
- Performance: Database indexes and query optimization
- Security: Input validation and security scanning
- Scalability: Event-driven architecture and health checks

## Statistics
- 70+ new files created
- 8,000+ lines of code
- 18 services, 9 repositories, 9 schemas
- 15 utility modules
- 5 test files with examples

This transformation establishes a solid foundation for future development
and follows industry best practices for maintainable, scalable applications.
2025-11-23 20:00:10 +01:00

109 lines
3.1 KiB
Python

"""
Service for expense business logic.
"""
from typing import Optional, Dict, Any, List
from datetime import date
from decimal import Decimal
from app import db
from app.repositories import ExpenseRepository, ProjectRepository
from app.models import Expense
from app.utils.db import safe_commit
class ExpenseService:
"""Service for expense operations"""
def __init__(self):
self.expense_repo = ExpenseRepository()
self.project_repo = ProjectRepository()
def create_expense(
self,
project_id: int,
amount: Decimal,
description: str,
expense_date: date,
category_id: Optional[int] = None,
billable: bool = False,
receipt_path: Optional[str] = None,
created_by: int
) -> Dict[str, Any]:
"""
Create a new expense.
Returns:
dict with 'success', 'message', and 'expense' keys
"""
# Validate project
project = self.project_repo.get_by_id(project_id)
if not project:
return {
'success': False,
'message': 'Invalid project',
'error': 'invalid_project'
}
# Validate amount
if amount <= 0:
return {
'success': False,
'message': 'Amount must be greater than zero',
'error': 'invalid_amount'
}
# Create expense
expense = self.expense_repo.create(
project_id=project_id,
amount=amount,
description=description,
date=expense_date,
category_id=category_id,
billable=billable,
receipt_path=receipt_path,
created_by=created_by
)
if not safe_commit('create_expense', {'project_id': project_id, 'created_by': created_by}):
return {
'success': False,
'message': 'Could not create expense due to a database error',
'error': 'database_error'
}
return {
'success': True,
'message': 'Expense created successfully',
'expense': expense
}
def get_project_expenses(
self,
project_id: int,
start_date: Optional[date] = None,
end_date: Optional[date] = None
) -> List[Expense]:
"""Get expenses for a project"""
return self.expense_repo.get_by_project(
project_id=project_id,
start_date=start_date,
end_date=end_date,
include_relations=True
)
def get_total_expenses(
self,
project_id: Optional[int] = None,
start_date: Optional[date] = None,
end_date: Optional[date] = None,
billable_only: bool = False
) -> float:
"""Get total expense amount"""
return self.expense_repo.get_total_amount(
project_id=project_id,
start_date=start_date,
end_date=end_date,
billable_only=billable_only
)