Michael Chus
20309d1f0e
Renamed module path git.mchus.pro/mchus/quoteforge → git.mchus.pro/mchus/priceforge, renamed package quoteforge → priceforge, moved binary from cmd/qfs to cmd/pfs.
93 lines
3.0 KiB
Go
93 lines
3.0 KiB
Go
package models
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import (
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"database/sql/driver"
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"encoding/json"
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"errors"
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"time"
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)
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type PriceMethod string
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const (
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PriceMethodManual PriceMethod = "manual"
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PriceMethodMedian PriceMethod = "median"
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PriceMethodAverage PriceMethod = "average"
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PriceMethodWeightedMedian PriceMethod = "weighted_median"
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)
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type Specs map[string]interface{}
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func (s Specs) Value() (driver.Value, error) {
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return json.Marshal(s)
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}
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func (s *Specs) Scan(value interface{}) error {
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if value == nil {
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*s = make(Specs)
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return nil
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}
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bytes, ok := value.([]byte)
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if !ok {
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return errors.New("type assertion to []byte failed")
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}
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return json.Unmarshal(bytes, s)
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}
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type LotMetadata struct {
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LotName string `gorm:"column:lot_name;primaryKey;size:255" json:"lot_name"`
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CategoryID *uint `gorm:"column:category_id" json:"category_id"`
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Model string `gorm:"size:100" json:"model"`
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Specs Specs `gorm:"type:json" json:"specs"`
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CurrentPrice *float64 `gorm:"type:decimal(12,2)" json:"current_price"`
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PriceMethod PriceMethod `gorm:"type:enum('manual','median','average','weighted_median');default:'median'" json:"price_method"`
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PricePeriodDays int `gorm:"default:90" json:"price_period_days"`
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PriceCoefficient float64 `gorm:"type:decimal(5,2);default:0" json:"price_coefficient"`
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ManualPrice *float64 `gorm:"type:decimal(12,2)" json:"manual_price"`
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PriceUpdatedAt *time.Time `json:"price_updated_at"`
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RequestCount int `gorm:"default:0" json:"request_count"`
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LastRequestDate *time.Time `gorm:"type:date" json:"last_request_date"`
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PopularityScore float64 `gorm:"type:decimal(10,4);default:0" json:"popularity_score"`
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MetaPrices string `gorm:"size:1000" json:"meta_prices"`
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MetaMethod string `gorm:"size:20" json:"meta_method"`
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MetaPeriodDays int `gorm:"default:90" json:"meta_period_days"`
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IsHidden bool `gorm:"default:false" json:"is_hidden"`
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// Relations
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Lot *Lot `gorm:"foreignKey:LotName;references:LotName" json:"lot,omitempty"`
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Category *Category `gorm:"foreignKey:CategoryID" json:"category,omitempty"`
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}
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func (LotMetadata) TableName() string {
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return "qt_lot_metadata"
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}
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type PriceFreshness string
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const (
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FreshnessFresh PriceFreshness = "fresh"
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FreshnessNormal PriceFreshness = "normal"
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FreshnessStale PriceFreshness = "stale"
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FreshnessCritical PriceFreshness = "critical"
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)
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func (m *LotMetadata) GetPriceFreshness(greenDays, yellowDays, redDays, minQuotes int) PriceFreshness {
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if m.CurrentPrice == nil || *m.CurrentPrice == 0 {
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return FreshnessCritical
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}
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if m.PriceUpdatedAt == nil {
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return FreshnessCritical
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}
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daysSince := int(time.Since(*m.PriceUpdatedAt).Hours() / 24)
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if daysSince < greenDays && m.RequestCount >= minQuotes {
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return FreshnessFresh
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} else if daysSince < yellowDays {
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return FreshnessNormal
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} else if daysSince < redDays {
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return FreshnessStale
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}
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return FreshnessCritical
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}
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