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order.go
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order.go
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package order_clause
import (
"strings"
"github.com/beego/beego/v2/client/orm/clauses"
)
type Sort int8
const (
None Sort = 0
Ascending Sort = 1
Descending Sort = 2
)
type Option func(order *Order)
type Order struct {
column string
sort Sort
isRaw bool
}
func Clause(options ...Option) *Order {
o := &Order{}
for _, option := range options {
option(o)
}
return o
}
func (o *Order) GetColumn() string {
return o.column
}
func (o *Order) GetSort() Sort {
return o.sort
}
func (o *Order) SortString() string {
switch o.GetSort() {
case Ascending:
return "ASC"
case Descending:
return "DESC"
}
return ``
}
func (o *Order) IsRaw() bool {
return o.isRaw
}
func ParseOrder(expressions ...string) []*Order {
var orders []*Order
for _, expression := range expressions {
sort := Ascending
column := strings.ReplaceAll(expression, clauses.ExprSep, clauses.ExprDot)
if column[0] == '-' {
sort = Descending
column = column[1:]
}
orders = append(orders, &Order{
column: column,
sort: sort,
})
}
return orders
}
func Column(column string) Option {
return func(order *Order) {
order.column = strings.ReplaceAll(column, clauses.ExprSep, clauses.ExprDot)
}
}
func sort(sort Sort) Option {
return func(order *Order) {
order.sort = sort
}
}
func SortAscending() Option {
return sort(Ascending)
}
func SortDescending() Option {
return sort(Descending)
}
func SortNone() Option {
return sort(None)
}
func Raw() Option {
return func(order *Order) {
order.isRaw = true
}
}