Reapply "feat(loyalty): EnakPoint & EnakCoin" (#32)

This reverts commit 4e24f9bbb0.

internal/service/customer_device_service.go

@@ -0,0 +1,58 @@
+package service
+
+import (
+	"context"
+	"errors"
+
+	"github.com/google/uuid"
+
+	"apskel-pos-be/internal/constants"
+	"apskel-pos-be/internal/contract"
+	"apskel-pos-be/internal/processor"
+	"apskel-pos-be/internal/repository"
+)
+
+// CustomerDeviceService registers the customer app's devices for push notifications.
+type CustomerDeviceService interface {
+	Register(ctx context.Context, customerID uuid.UUID, req *contract.RegisterCustomerDeviceRequest) *contract.Response
+	Unregister(ctx context.Context, customerID uuid.UUID, deviceID string) *contract.Response
+}
+
+type CustomerDeviceServiceImpl struct {
+	devices *processor.CustomerDeviceProcessor
+}
+
+func NewCustomerDeviceService(devices *processor.CustomerDeviceProcessor) *CustomerDeviceServiceImpl {
+	return &CustomerDeviceServiceImpl{devices: devices}
+}
+
+func (s *CustomerDeviceServiceImpl) Register(ctx context.Context, customerID uuid.UUID, req *contract.RegisterCustomerDeviceRequest) *contract.Response {
+	err := s.devices.Register(ctx, repository.CustomerDevice{
+		CustomerID: customerID,
+		DeviceID:   req.DeviceID,
+		FCMToken:   req.FCMToken,
+		Platform:   req.Platform,
+		AppVersion: req.AppVersion,
+	})
+	if err != nil {
+		return customerDeviceErrorResponse(err)
+	}
+	return contract.BuildSuccessResponse(map[string]interface{}{"device_id": req.DeviceID})
+}
+
+func (s *CustomerDeviceServiceImpl) Unregister(ctx context.Context, customerID uuid.UUID, deviceID string) *contract.Response {
+	if err := s.devices.Unregister(ctx, customerID, deviceID); err != nil {
+		return customerDeviceErrorResponse(err)
+	}
+	return contract.BuildSuccessResponse(map[string]interface{}{"device_id": deviceID})
+}
+
+func customerDeviceErrorResponse(err error) *contract.Response {
+	code := constants.InternalServerErrorCode
+	if errors.Is(err, processor.ErrInvalidCustomerDevice) {
+		code = constants.ValidationErrorCode
+	}
+	return contract.BuildErrorResponse([]*contract.ResponseError{
+		contract.NewResponseError(code, constants.RequestEntity, err.Error()),
+	})
+}