alert usecases & repository methods

internal/usecase/alert.go

@@ -0,0 +1,57 @@
+package usecase
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.computernetthings.ru/yash/crypto_alert_bot/internal/entities"
+	"github.com/shopspring/decimal"
+)
+
+func (uc *Usecase) CreateAlert(ctx context.Context, alert *entities.Alert) (entities.AlertID, error) {
+	id, err := uc.storage.SaveAlert(ctx, alert)
+	if err != nil {
+		uc.log.Error("failed to create alert", "alert", alert, "err", err)
+		return "", fmt.Errorf("failed to create alert: %w", err)
+	}
+
+	return id, nil
+}
+
+func (uc *Usecase) Alert(ctx context.Context, alertID entities.AlertID) (*entities.Alert, error) {
+	alert, err := uc.storage.AlertByID(ctx, alertID)
+	if err != nil {
+		uc.log.Error("failed to get alert", "alert_id", alertID, "err", err)
+		return nil, fmt.Errorf("failed to get alert: %w", err)
+	}
+
+	return alert, nil
+}
+
+func (uc *Usecase) Alerts(ctx context.Context, userID entities.UserID, offset, limit int) ([]entities.Alert, error) {
+	alerts, err := uc.storage.AlertsByUserID(ctx, userID, offset, limit)
+	if err != nil {
+		uc.log.Error("failed to get alerts", "user_id", userID, "err", err)
+		return nil, fmt.Errorf("failed to get alerts: %w", err)
+	}
+
+	return alerts, nil
+}
+
+func (uc *Usecase) RemoveAlert(ctx context.Context, alertID entities.AlertID) error {
+	if err := uc.storage.DeleteAlert(ctx, alertID); err != nil {
+		uc.log.Error("failed to remove alert", "alert_id", alertID, "err", err)
+		return fmt.Errorf("failed to remove alert: %w", err)
+	}
+
+	return nil
+}
+
+func (uc *Usecase) UpdateAlertPrice(ctx context.Context, alertID entities.AlertID, price decimal.Decimal) error {
+	if err := uc.storage.UpdateAlertPrice(ctx, alertID, price); err != nil {
+		uc.log.Error("failed to update alert price", "alert_id", alertID, "price", price, "err", err)
+		return fmt.Errorf("failed to update alert price: %w", err)
+	}
+
+	return nil
+}