apskel-pos-backend/internal/entities/product.go

package entities

import (
	"strings"
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

type Product struct {
	ID             uuid.UUID `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	OrganizationID uuid.UUID `gorm:"type:uuid;not null;index" json:"organization_id" validate:"required"`
	CategoryID     uuid.UUID `gorm:"type:uuid;not null;index" json:"category_id" validate:"required"`
	SKU            *string   `gorm:"size:100;index" json:"sku"`
	Name           string    `gorm:"not null;size:255" json:"name" validate:"required,min=1,max=255"`
	Description    *string   `gorm:"type:text" json:"description"`
	Price          float64   `gorm:"type:decimal(10,2);not null" json:"price" validate:"required,min=0"`
	Cost           float64   `gorm:"type:decimal(10,2);default:0.00" json:"cost" validate:"min=0"`
	BusinessType   string    `gorm:"size:50;default:'restaurant'" json:"business_type"`
	ImageURL       *string   `gorm:"size:500" json:"image_url"`
	// PrinterTypes are the stations the product is printed at. Set them through
	// SetPrinterTypes.
	PrinterTypes   StringSlice `gorm:"type:jsonb;not null;default:'[\"kitchen\"]'" json:"printer_types"`
	UnitID         *uuid.UUID  `gorm:"type:uuid;index" json:"unit_id"`
	SellBy         string      `gorm:"size:20;default:'unit'" json:"sell_by"`
	HasIngredients bool        `gorm:"default:false" json:"has_ingredients"`
	Metadata       Metadata    `gorm:"type:jsonb;default:'{}'" json:"metadata"`
	IsActive       bool        `gorm:"default:true" json:"is_active"`
	CreatedAt      time.Time   `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt      time.Time   `gorm:"autoUpdateTime" json:"updated_at"`

	Organization        Organization         `gorm:"foreignKey:OrganizationID" json:"organization,omitempty"`
	Category            Category             `gorm:"foreignKey:CategoryID" json:"category,omitempty"`
	Unit                *Unit                `gorm:"foreignKey:UnitID" json:"unit,omitempty"`
	ProductVariants     []ProductVariant     `gorm:"foreignKey:ProductID" json:"variants,omitempty"`
	ProductRecipes      []ProductRecipe      `gorm:"foreignKey:ProductID" json:"product_recipes,omitempty"`
	Inventory           []Inventory          `gorm:"foreignKey:ProductID" json:"inventory,omitempty"`
	OrderItems          []OrderItem          `gorm:"foreignKey:ProductID" json:"order_items,omitempty"`
	ProductOutletPrices []ProductOutletPrice `gorm:"foreignKey:ProductID" json:"product_outlet_prices,omitempty"`
}

func (p *Product) BeforeCreate(tx *gorm.DB) error {
	if p.ID == uuid.Nil {
		p.ID = uuid.New()
	}
	return nil
}

func (Product) TableName() string {
	return "products"
}

// SetPrinterTypes records the stations the product is printed at, in order, dropping
// blanks and repeats.
func (p *Product) SetPrinterTypes(printerTypes []string) {
	cleaned := StringSlice{}
	seen := make(map[string]bool, len(printerTypes))
	for _, printerType := range printerTypes {
		printerType = strings.TrimSpace(printerType)
		if printerType == "" || seen[printerType] {
			continue
		}
		seen[printerType] = true
		cleaned = append(cleaned, printerType)
	}

	p.PrinterTypes = cleaned
}

// GetPrinterTypes returns the stations the product is printed at, never nil, so a
// response always carries a list. A product that was not loaded has none.
func (p *Product) GetPrinterTypes() []string {
	if p.PrinterTypes == nil {
		return []string{}
	}
	return []string(p.PrinterTypes)
}

type ProductVariant struct {
	ID            uuid.UUID `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	ProductID     uuid.UUID `gorm:"type:uuid;not null;index" json:"product_id" validate:"required"`
	Name          string    `gorm:"not null;size:255" json:"name" validate:"required,min=1,max=255"`
	PriceModifier float64   `gorm:"type:decimal(10,2);default:0.00" json:"price_modifier"`
	Cost          float64   `gorm:"type:decimal(10,2);default:0.00" json:"cost" validate:"min=0"`
	Metadata      Metadata  `gorm:"type:jsonb;default:'{}'" json:"metadata"`
	CreatedAt     time.Time `gorm:"autoCreateTime" json:"created_at"`
	UpdatedAt     time.Time `gorm:"autoUpdateTime" json:"updated_at"`

	Product    Product     `gorm:"foreignKey:ProductID" json:"product,omitempty"`
	OrderItems []OrderItem `gorm:"foreignKey:ProductVariantID" json:"order_items,omitempty"`
}

func (pv *ProductVariant) BeforeCreate(tx *gorm.DB) error {
	if pv.ID == uuid.Nil {
		pv.ID = uuid.New()
	}
	return nil
}

func (ProductVariant) TableName() string {
	return "product_variants"
}