init commit

app/services/finance/transaction_service.py

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+"""Transaction service"""
+
+from typing import Optional, List
+from datetime import datetime, timedelta
+from sqlalchemy.orm import Session
+from app.db.repositories import TransactionRepository, AccountRepository, BudgetRepository
+from app.db.models import Transaction, TransactionType
+from app.schemas import TransactionCreateSchema
+
+
+class TransactionService:
+    """Service for transaction operations"""
+
+    def __init__(self, session: Session):
+        self.session = session
+        self.transaction_repo = TransactionRepository(session)
+        self.account_repo = AccountRepository(session)
+        self.budget_repo = BudgetRepository(session)
+
+    def create_transaction(
+        self,
+        family_id: int,
+        user_id: int,
+        account_id: int,
+        data: TransactionCreateSchema,
+    ) -> Transaction:
+        """Create new transaction and update account balance"""
+        # Create transaction
+        transaction = self.transaction_repo.create(
+            family_id=family_id,
+            user_id=user_id,
+            account_id=account_id,
+            amount=data.amount,
+            transaction_type=data.transaction_type,
+            description=data.description,
+            notes=data.notes,
+            tags=data.tags,
+            category_id=data.category_id,
+            receipt_photo_url=data.receipt_photo_url,
+            transaction_date=data.transaction_date,
+        )
+
+        # Update account balance
+        if data.transaction_type == TransactionType.EXPENSE:
+            self.account_repo.update_balance(account_id, -data.amount)
+        elif data.transaction_type == TransactionType.INCOME:
+            self.account_repo.update_balance(account_id, data.amount)
+
+        # Update budget if expense
+        if (
+            data.transaction_type == TransactionType.EXPENSE
+            and data.category_id
+        ):
+            budget = self.budget_repo.get_category_budget(family_id, data.category_id)
+            if budget:
+                self.budget_repo.update_spent_amount(budget.id, data.amount)
+
+        return transaction
+
+    def get_family_summary(self, family_id: int, days: int = 30) -> dict:
+        """Get financial summary for family"""
+        end_date = datetime.utcnow()
+        start_date = end_date - timedelta(days=days)
+
+        transactions = self.transaction_repo.get_transactions_by_period(
+            family_id, start_date, end_date
+        )
+
+        income = sum(t.amount for t in transactions if t.transaction_type == TransactionType.INCOME)
+        expenses = sum(t.amount for t in transactions if t.transaction_type == TransactionType.EXPENSE)
+        net = income - expenses
+
+        return {
+            "period_days": days,
+            "income": income,
+            "expenses": expenses,
+            "net": net,
+            "average_daily_expense": expenses / days if days > 0 else 0,
+            "transaction_count": len(transactions),
+        }
+
+    def delete_transaction(self, transaction_id: int) -> bool:
+        """Delete transaction and rollback balance"""
+        transaction = self.transaction_repo.get_by_id(transaction_id)
+        if transaction:
+            # Rollback balance
+            if transaction.transaction_type == TransactionType.EXPENSE:
+                self.account_repo.update_balance(transaction.account_id, transaction.amount)
+            elif transaction.transaction_type == TransactionType.INCOME:
+                self.account_repo.update_balance(transaction.account_id, -transaction.amount)
+
+            # Delete transaction
+            return self.transaction_repo.delete(transaction_id)
+        return False