通用包
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utils/pagination/v1/pagination.go

52 lines
866 B

package pagination
import "math"
const (
DefaultPage = 1
MinPageSize = 10
MaxPageSize = 100
)
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
}