✨ Refactor application initialization to load configuration and enhance message processing. Introduce effective subscription topic handling and improve error management in NATS consumer. Update tests for publisher error handling and add new dependency injection method for app initialization.

internal/infra/postgres/repository.go

@@ -6,6 +6,7 @@ import (
 	"caatsm/internal/domain"
 	"context"
 	"fmt"
+
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
 	"go.uber.org/zap"
@@ -45,7 +46,7 @@ func (r *Repository) InsertOne(ctx context.Context, msg *domain.ParsedMessage) e
 		ON CONFLICT (uuid) DO NOTHING
 	`
 
-	_, err = r.pool.Exec(ctx, query,
+	tag, err := r.pool.Exec(ctx, query,
 		row[0], row[1], row[2], row[3], row[4], row[5], row[6], row[7], row[8],
 		row[9], row[10], row[11], row[12], row[13], row[14],
 	)
@@ -53,6 +54,14 @@ func (r *Repository) InsertOne(ctx context.Context, msg *domain.ParsedMessage) e
 		return fmt.Errorf("failed to insert message: %w", err)
 	}
 
+	if tag.RowsAffected() == 0 {
+		r.logger.Info("Duplicate message skipped",
+			zap.String("uuid", msg.Uuid),
+			zap.String("message_id", msg.MessageID),
+		)
+		return nil
+	}
+
 	r.logger.Debug("Inserted message",
 		zap.String("uuid", msg.Uuid),
 		zap.String("message_id", msg.MessageID),