Added structured logging across services and repositories. Updated SQL queries to use parameterized placeholders for better readability and security. Enhanced error handling for external service communication.

backend/src/api/services/receipts.go

@@ -4,8 +4,10 @@ import (
 	"FamilyHub/src/domain"
 	"FamilyHub/src/integrations/receiptProvider"
 	"FamilyHub/src/repositories"
+	"FamilyHub/src/utils"
 	"context"
 	"fmt"
+	"log"
 	"strings"
 )
 
@@ -35,18 +37,23 @@ func (s *receiptService) AddReceipt(
 	ctx context.Context,
 	req domain.AddReceiptRequest,
 ) (*domain.Receipt, error) {
+	log.Printf("receipt add request: payload=%s", utils.ToLogJSON(req))
+
 	receipt, err := s.provider.GetReceipt(ctx, req.Date, req.Number)
 	if err != nil {
+		log.Printf("receipt add failed: err=%v payload=%s", err, utils.ToLogJSON(req))
 		return nil, err
 	}
 
 	receiptID, err := s.repo.Create(ctx, receipt)
 	if err != nil {
+		log.Printf("receipt persist failed: err=%v receipt=%s", err, utils.ToLogJSON(receipt))
 		return nil, err
 	}
 	receipt.ID = int(receiptID)
 
 	if !s.shouldCreateTransaction(req) {
+		log.Printf("receipt add response: payload=%s", utils.ToLogJSON(receipt))
 		return receipt, nil
 	}
 
@@ -59,6 +66,7 @@ func (s *receiptService) AddReceipt(
 	}
 
 	receipt.TransactionID = &transaction.ID
+	log.Printf("receipt add response: payload=%s", utils.ToLogJSON(receipt))
 	return receipt, nil
 }
 
@@ -94,11 +102,14 @@ func (s *receiptService) createTransactionForReceipt(
 		CreatedBy:   *req.CreatedBy,
 		ReceiptID:   &receiptID,
 	}
-
+	log.Printf("%+v\n", transaction)
+	log.Printf("receipt transaction create request: payload=%s", utils.ToLogJSON(transaction))
 	if err := s.transactionRepo.Create(ctx, transaction); err != nil {
+		log.Printf("receipt transaction create failed: err=%v payload=%s", err, utils.ToLogJSON(transaction))
 		return nil, err
 	}
 
+	log.Printf("receipt transaction create response: payload=%s", utils.ToLogJSON(transaction))
 	return transaction, nil
 }