通用包
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
utils/pagination/v1/pagination.go

60 lines
1.0 KiB

2 years ago
package pagination
import "math"
const (
DefaultPage = 1
MinPageSize = 10
MaxPageSize = 100
)
type Pagination struct {
Page int32 `json:"page"`
PageSize int32 `json:"page_size"`
TotalPage int32 `json:"total_page"`
Total int32 `json:"total"`
}
type Integer interface {
~int | ~int32
}
func PageToOffset[T Integer](page, pageSize T) (offset, limit T) {
if page < DefaultPage {
page = DefaultPage
}
if pageSize <= MinPageSize {
pageSize = MinPageSize
}
if pageSize >= MaxPageSize {
pageSize = MaxPageSize
}
offset = (page - 1) * pageSize
limit = pageSize
return
}
func CalcPagination[T Integer, E Integer](page, pageSize T, total E) (res Pagination) {
if page < DefaultPage {
page = DefaultPage
}
if pageSize <= MinPageSize {
pageSize = MinPageSize
}
if pageSize >= MaxPageSize {
pageSize = MaxPageSize
}
res.Page = int32(page)
res.PageSize = int32(pageSize)
res.Total = int32(total)
res.TotalPage = int32(math.Ceil(float64(res.Total) / float64(res.PageSize)))
return
}