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taxes.go
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/
taxes.go
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package models
import (
"encoding/json"
"github.com/satori/go.uuid"
"github.com/shopspring/decimal"
"strings"
)
// TaxOrigin is defines tax scope according to inventory item origin
type TaxOrigin string
const (
TaxOriginAll TaxOrigin = "ALL"
TaxOriginLocal TaxOrigin = "LOCAL"
TaxOriginImport TaxOrigin = "IMPORT"
)
// TaxCondition is defines category given in tax subject or exempt from tax.
type TaxCondition string
const (
UnknownTC TaxCondition = "UNKNOWN"
ExemptToTax TaxCondition = "EXEMPT" // refers to only tax types in context will be free from tax
SubjectToTax TaxCondition = "SUBJECT" // refers to only tax types in context will be effected from tax
)
// Tax
type Tax struct {
Id uuid.UUID `json:"id"`
Name string `json:"name"`
Rate decimal.Decimal `json:"rate"`
Origin TaxOrigin `json:"origin"`
Condition TaxCondition `json:"condition"`
Categories map[uuid.UUID]bool `json:"categories"`
}
type SaleItem struct {
*InventoryItem
Taxes decimal.Decimal `json:"taxes"`
Gross decimal.Decimal `json:"gross"`
}
func (t *Tax) String() string {
b, err := json.Marshal(t)
if err != nil {
return ""
}
return string(b)
}
func (si *SaleItem) String() string {
b, err := json.Marshal(si)
if err != nil {
return ""
}
return string(b)
}
func (tt *TaxOrigin) UnmarshalText(b []byte) error {
str := strings.Trim(string(b), `"`)
switch str {
case "LOCAL", "IMPORT", "ALL":
*tt = TaxOrigin(str)
default:
*tt = TaxOriginAll
}
return nil
}
func (tc *TaxCondition) UnmarshalText(b []byte) error {
str := strings.Trim(string(b), `"`)
switch str {
case "EXEMPT", "SUBJECT":
*tc = TaxCondition(str)
default:
*tc = UnknownTC
}
return nil
}