weijuesen
46 lines
1.6 KiB
Go
46 lines
1.6 KiB
Go
package model
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import (
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"math"
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"time"
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)
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// Consumable 耗材
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type Consumable struct {
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ID string `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
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Name string `gorm:"size:64" json:"name"`
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Category string `gorm:"size:32;index" json:"category"` // lamp_reagent/lamp_consumable/disinfectant/other
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Spec *string `gorm:"size:128" json:"spec,omitempty"`
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Quantity float64 `gorm:"type:float" json:"quantity"`
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Unit *string `gorm:"size:32" json:"unit,omitempty"`
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MinQuantity float64 `gorm:"column:min_quantity;type:float" json:"minQuantity"`
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ExpiryDate *time.Time `gorm:"column:expiry_date;type:timestamptz" json:"expiryDate,omitempty"`
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Supplier *string `gorm:"size:128" json:"supplier,omitempty"`
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Note *string `gorm:"type:text" json:"note,omitempty"`
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CreatedAt time.Time `gorm:"type:timestamptz" json:"createdAt"`
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UpdatedAt time.Time `gorm:"type:timestamptz" json:"updatedAt"`
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}
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func (Consumable) TableName() string { return "consumables" }
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// LowStockAlert 库存低于安全阈值
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func (c Consumable) LowStockAlert() bool {
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return c.Quantity < c.MinQuantity
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}
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// ExpiringAlert 效期在 days 天内到期（含已过期）
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func (c Consumable) ExpiringAlert(days int) bool {
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if c.ExpiryDate == nil {
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return false
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}
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return !c.ExpiryDate.After(time.Now().Add(time.Duration(days) * 24 * time.Hour))
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}
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// PurchaseSuggestion 建议采购量（低于安全阈值时补足差额，向上取整）
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func (c Consumable) PurchaseSuggestion() float64 {
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if !c.LowStockAlert() {
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return 0
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}
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return math.Ceil(c.MinQuantity - c.Quantity)
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}
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