app-cloudep-order-server/internal/logic/orderservice/decimal_tools.go

package orderservicelogic

import (
	"github.com/shopspring/decimal"
	"github.com/zeromicro/go-zero/core/logx"
	"go.mongodb.org/mongo-driver/bson/primitive"
)

// Helper function for decimal conversion with nil support and logging
func decimalPtrFromString(val string) *decimal.Decimal {
	if val == "" {
		return nil
	}
	dec, err := decimal.NewFromString(val)
	if err != nil {
		logx.Errorf("Failed to convert string to decimal: %v", err)

		return nil
	}

	return &dec
}

// Convert decimal.Decimal to primitive.Decimal128 and handle nil values
func convertDecimalPtrToDecimal128(d *decimal.Decimal) *primitive.Decimal128 {
	if d == nil {
		return nil
	}
	result, err := primitive.ParseDecimal128(d.String())
	if err != nil {
		logx.Errorf("Failed to convert decimal to Decimal128: %v", err)

		return nil
	}

	return &result
}

// Convert decimal.Decimal (non-pointer) to primitive.Decimal128 and log errors
func convertDecimalToDecimal128(d decimal.Decimal) primitive.Decimal128 {
	result, err := primitive.ParseDecimal128(d.String())
	if err != nil {
		logx.Errorf("Failed to convert decimal to Decimal128: %v", err)

		return primitive.NewDecimal128(0, 0)
	}

	return result
}

// 將 primitive.Decimal128 轉換為字符串
func convertDecimal128ToString(d128 *primitive.Decimal128) *string {
	if d128 == nil {
		return nil
	}
	result := d128.String()

	return &result
}

// Helper functions for optional fields
func optionalString(s *string) *string {
	if s != nil {
		return s
	}

	return nil
}

func optionalInt64(i *int64) *int64 {
	if i != nil {
		return i
	}

	return nil
}

func nilString(s *string) *string {
	if s == nil {
		return nil
	}

	return s
}

func nilInt64(i *int64) *int64 {
	if i == nil {
		return nil
	}

	return i
}