add product ingredients

internal/processor/ingredient_unit_converter_processor.go

@@ -32,6 +32,7 @@ type IngredientUnitConverterProcessor interface {
 	ListIngredientUnitConverters(ctx context.Context, organizationID uuid.UUID, filters map[string]interface{}, page, limit int) ([]*models.IngredientUnitConverterResponse, int, error)
 	GetConvertersForIngredient(ctx context.Context, ingredientID, organizationID uuid.UUID) ([]*models.IngredientUnitConverterResponse, error)
 	ConvertUnit(ctx context.Context, organizationID uuid.UUID, req *models.ConvertUnitRequest) (*models.ConvertUnitResponse, error)
+	GetUnitsByIngredientID(ctx context.Context, organizationID, ingredientID uuid.UUID) (*models.IngredientUnitsResponse, error)
 }
 
 type IngredientUnitConverterProcessorImpl struct {
@@ -257,3 +258,64 @@ func (p *IngredientUnitConverterProcessorImpl) ConvertUnit(ctx context.Context,
 
 	return response, nil
 }
+
+func (p *IngredientUnitConverterProcessorImpl) GetUnitsByIngredientID(ctx context.Context, organizationID, ingredientID uuid.UUID) (*models.IngredientUnitsResponse, error) {
+	// Get the ingredient with its base unit
+	ingredient, err := p.ingredientRepo.GetByID(ctx, ingredientID, organizationID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get ingredient: %w", err)
+	}
+
+	// Get the base unit details
+	baseUnit, err := p.unitRepo.GetByID(ctx, ingredient.UnitID, organizationID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get base unit: %w", err)
+	}
+
+	// Start with the base unit
+	units := []*models.UnitResponse{
+		mappers.MapUnitEntityToResponse(baseUnit),
+	}
+
+	// Get all converters for this ingredient
+	converters, err := p.converterRepo.GetConvertersForIngredient(ctx, ingredientID, organizationID)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get converters: %w", err)
+	}
+
+	// Add unique units from converters
+	unitMap := make(map[uuid.UUID]bool)
+	unitMap[baseUnit.ID] = true
+
+	for _, converter := range converters {
+		if converter.IsActive {
+			// Add FromUnit if not already added
+			if !unitMap[converter.FromUnitID] {
+				fromUnit, err := p.unitRepo.GetByID(ctx, converter.FromUnitID, organizationID)
+				if err == nil {
+					units = append(units, mappers.MapUnitEntityToResponse(fromUnit))
+					unitMap[converter.FromUnitID] = true
+				}
+			}
+
+			// Add ToUnit if not already added
+			if !unitMap[converter.ToUnitID] {
+				toUnit, err := p.unitRepo.GetByID(ctx, converter.ToUnitID, organizationID)
+				if err == nil {
+					units = append(units, mappers.MapUnitEntityToResponse(toUnit))
+					unitMap[converter.ToUnitID] = true
+				}
+			}
+		}
+	}
+
+	response := &models.IngredientUnitsResponse{
+		IngredientID:   ingredientID,
+		IngredientName: ingredient.Name,
+		BaseUnitID:     baseUnit.ID,
+		BaseUnitName:   baseUnit.Name,
+		Units:          units,
+	}
+
+	return response, nil
+}